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| 1 | Value of ecosystem services in China显示文摘The function and services are the important components of the life-support system in theplanet, as well as the basic elements for sustainable development of environment and society. It is a must to evaluate it for incorporating it with the social-economic system. It is also an important approach to draw the public attention on the environmental and ecosystem conservation. In this study, the ecosystem function and services in China were estimated by employing the classification and economic parameters from Costanza et al. The type and area of terrestrial ecosystems were extracted from Vegetation Map of China (1:4 000 000), and then the distribution map of ecosystem services of China was drawn. According to our calculation, the total value of ecosystem services in China is 77 834.48×108 RMB yuan per annum. The value for terrestrial ecosystem is 56 098.46×108 yuan per annum, and that for marine ecosystem is 21 736.02×108 yuan per annum. The value of ecosystem services in China is 1.73 times bigger | CHEN Zhongxin & ZHANG XinshiLaboratory of Quantitative Vegetation Ecology, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China Current address: Institute of Natural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China | 2000 | Chinese Science Bulletin2000，45，10： | 128 |
| 2 | Fluxes of CO_2, N_2O and CH_4 from a typical temperate grassland in Inner Mongolia and its daily variation显示文摘Using a dark enclosed chamber technique, the fluxes of CO2, N2O and CH4 from nature and disturbed grassland were measured on the spot in Inner Mongolian Temperate Grassland along the annual rainfall gradient section ranging from 450 to 200 mm. The results showed that the measured mean fluxes of CO2, N2O and CH4were (1 180.4 ±308.7), (0.010 ± 0.004) and (-0.039 ± 0.016) mg · m-2/h, respectively. The decrease of the fluxes of CO2, N2O and CH4 follows with that of annual rainfall gradient in the measurement area. Human activities, such as grazing and reclamation are also critical factors to affect the fluxes of these gases from grassland. Daily continuous measurement of CO2, N2O and CH4 fluxes showed a strong diurnal variation with higher emission in the daytime. A good relationship between the fluxes of CO2, N2O, CH4 and temperature was exposed in this study. | DONG Yunshe, ZHANG Shen, Ql Yuchun, CHEN Zuozhong & GENG Yuanbo1. Institute of Geography, Chinese Academy of Sciences, Beijing 100101, China:2, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China Correspondence should be addressed to Dong Yunshe | 2000 | Chinese Science Bulletin2000，45，17： | 66 |
| 3 | The characteristics of CO_2 assimilation of photosynthesis and chlorophyll fluorescence in transgenic PEPC rice显示文摘With PEPC, PPDK, NADP-ME and PEPC+ PPDK transgenic and untransformed rice (Orysa sativa L.), the activities of related C4 photosynthesis enzymes, the chlorophyll fluorescence parameters, CO2 exchange and other physiological indexes were compared, in which the physiological characteristics of PEPC transgenic rice were mainly studied. The results were as follows: (i) The activities of PEPC in PEPC transgenic rice were 20-fold higher than those in untransformed rice; the light-saturation photosynthetic rates and the carboxylation efficiency of PEPC transgenic rice were increased by 55% and 50% more than those of untransformed rice, respectively, while the CO2 compensation point decreased by 27%. (ii) The PS II photochemical efficiency (Fv/Fm) and photochemical quenching (qp) of transgenic PEPC rice decreased less in comparison with those of untransformed rice after the treatment with high light intensity (3 h) or methyl viologen (MV), a photooxidative reagent, which demonstrated that the tolerance of PEPC | JIAO Demao, LI Xia, HUANG Xueqing, CHI Wei, KUANG Tingyun & Ku SB Maurice1. Institute of Agrobiological Genetics and Physiology, Jiangsu Academy of Agricultural Sciences, Nangjing 210014, China 2. Institute of Botany, the Chinese Academy of Sciences, Beijing 100093, China 3. Botany Department, Washington State University, Pullman, WA 99164-4236, USA | 2001 | Chinese Science Bulletin2001，46，13： | 29 |
| 4 | Quantitative relationships between vegetation and several pollen taxa in surface soil from North China显示文摘According to the vegetation investigation and pollen analysis of surface samples sampled along a precipitation gradient of the Northeast China Transect (NECT), several pollen taxa, including Pinus, Betula, Quercus, Tilia, Acer, Ulmus, Artemisia, Chenopodiaceae, Gramineae and Cyperaceae, were chosen to make the regression and correlation analyses. The results indicated that there exists a close relationship between vegetation and pollen taxa in surface samples. The regression parameters for ten taxa in the forests in the eastern part of NECT were different from those in the steppes in the western part. Pinus, Betula, Artemisia and Chenopodiaceae, which have large slope and y-intercept terms, were over-representative taxa. Acer, Gramineae and Cyperaceae, which have small slope and y-intercept terms, were under-representative taxa. Quercus, Tilia and Ulmus whose slope terms have negative correlation with y-intercept terms were equi-representative taxa. The pollen taxa with large slope or large y-intercept | LI Yiyin, ZHANG Xinshi & ZHOU Guangsheng1. Department of Urbon and Environmental Sciences, Peking University, Beijing 100871, China 2. Laboratory of Quantitative Vegetation Ecology, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China 3. School of Urban and Environmental Sciences, Northeast Normal University, Changchun 130024, China Correspondence should be addressed to Li Yiyin | 2000 | Chinese Science Bulletin2000，45，16： | 24 |
| 5 | DNA barcoding:species delimitation in tree peonies显示文摘Delimitations of species are crucial for correct and precise identification of taxa.Unfortunately 'spe-cies' is more a subjective than an objective concept in taxonomic practice due to difficulties in revealing patterns of infra-or inter-specific variations.Molecular phylogenetic studies at the population level solve this problem and lay a sound foundation for DNA barcoding.In this paper we exemplify the necessity of adopting a phylogenetic concept of species in DNA barcoding for tree peonies(Paeonia sect.Moutan).We used 40 samples representing all known populations of rare and endangered species and several populations of widely distributed tree peonies.All currently recognized species and major variants have been included in this study.Four chloroplast gene fragments,i.e.ndhF,rps16-trnQ,trnL-F and trnS-G(a total of 5040 characters,96 variable and 69 parsimony-informative characters) and one variable and single-copy nuclear GPAT gene fragment(2093?2197 bp,279 variable and 148 parsi-mony-informative characters) were used to construct phylogenetic relationships among the taxa.The evolutionary lineages revealed by the nuclear gene and the chloroplast genes are inconsistent with the current circumscriptions of P.decomposita,P.jishanensis,P.qiui,and P.rockii based on morphology.The inconsistencies come from(1) significant chloroplast gene divergence but little nuclear GPAT gene divergence among population systems of P.decomposita + P.rockii,and(2) well-diverged nuclear GPAT gene but little chloroplast gene divergence between P.jishanensis and P.qiui.The incongruence of the phylogenies based on the chloroplast genes and the nuclear GPAT gene is probably due to the chloro-plast capture event in evolutionary history,as no reproductive barriers exist to prevent inter-specific hybridization.We also evaluated the suitability of these genes for use as DNA barcodes for tree peonies.The variability of chloroplast genes among well-defined species or population systems of a species complex is 4.82 times the figure within the groups,and the GPAT gene is twice as variable between the groups as within the groups.The number of completely divergent sites is sufficient to mark the two subsections,the two species in subsection Delavayanae,and the well-divergent species in subsection Vaginatae.But the genes currently used either from the chloroplast genome or from the nuclear genome alone cannot correctly assign samples of P.decomposita,P.jishanensis,P.qiui,or P.rockii to the spe-cies as currently defined.We conclude that(1) DNA barcoding should be based on prior phylogenetic studies to understand the evolutionary lineages and how well the taxonomic species correspond to the lineages;(2) it is unlikely to find a single short fragment as a barcode for every plant and such a frag-ment could result in misidentification when a chloroplast capture event happened in the evolutionary history of plants like tree peonies;and(3) we suggest striving for a universal marker at the familial level and locally universal barcodes within a family instead of looking for a universal barcode for all plants. | ZHANG JinMei1,2,WANG JianXiu1,2,XIA Tao1,2 & ZHOU ShiLiang1 1State Key Laboratory of Systematic and Evolutionary Botany,Institute of Botany,the Chinese Academy of Sciences,Beijing 100093,China 2Graduate School of the Chinese Academy of Sciences,Beijing 100039,China | 2009 | Science China(Life Sciences)2009，52，6： | 22 |
| 6 | A Genome-wide Functional Characterization of Arabidopsis Regulatory Calcium Sensors in Pollen Tubes显示文摘Calcium, an ubiquitous second messenger, plays an essential and versatile role in cellular signaling. The diverse function of calcium signals is achieved by an excess of calcium sensors. Plants possess large numbers of calcium sensors, most of which have not been functionally characterized. To identify physiologically relevant calcium sensors in a specific cell type, we conducted a genome-wide functional survey in pollen tubes, for which spatiotemporal calcium signals are well-characterized and required for polarized tip growth. Pollen-specific members of calmodulin (CaM), CaM-like (CML), calcium-dependent protein kinase (CDPK) and calcineurin B-like protein (CBL) families were tagged with green fluorescence protein (GFP) and their localization patterns and overexpression phenotypes were characterized in tobacco pollen tubes. We found that several fusion proteins showed distinct overexpression phenotypes and subcellular localization patterns. CDPK24-GFP was localized to the vegetative nucleus and the generative cell/sperms. CDPK32-GFP caused severe growth depolarization. CBL2-GFP and CBL3-GFP exhibited dynamic patterns of subcellular localization, including several endomembrane compartments, the apical plasma membrane (PM), and cytoskeleton-like structures in pollen tubes. Their overexpression also inhibited pollen tube elongation and induced growth depolarization. These putative calcium sensors are excellent candidates for the calcium sensors responsible for the regulation of calcium homeostasis and calciumdependent tip growth and growth oscillation in pollen tubes. | Liming Zhou1,2, Ying Fu1,2 and Zhenbiao Yang2,3 (1State Key Laboratory of Plant Physiology and Biochemistry, Department of Plant Sciences, College of Biological Sciences, China Agricultural University, Beijing 100193, China 2China Agricultural University (CAU)-University of California, Riverside (UCR) Joint Center for Biological Sciences and Biotechnology, College of Biological Sciences, China Agricultural University, Beijing 100193, China 3Center for Plant Cell Biology and Department of Botany and Plant Sciences, University of California, Riverside, CA 92521, USA) | 2009 | Journal of Integrative Plant Biology2009，51，8： | 21 |
| 7 | Two Novel Antifungal Saponins from Tibetan Herbal Medicine Clematis tangutica显示文摘Antifungal assay-guided isolation of the ethanol extract of the aerial parts of Clematis tangutica yielded two novel triterpene saponins. Their structures were determined to be 3-O-a-L-arabinopyranosyl hederagenin 28-O-a-L-rhamnopyranosyl ester (1) and 3-O-b-D- glucopyranosyl(14)-a-L-arabinopyranosyl hederagenin 28-O-a-L-rhamnopyranosyl ester (2) on the basis of spectral data and chemical reactions. | Zhi Zhi DU, Na ZHU, Yue Mao SHEN* Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650204 | 2003 | Chinese Chemical Letters2003，14，7： | 20 |
| 8 | Distribution of C_4 plants along the Northeast China transect and its correlation to the environmental factors显示文摘The distribution of C4 plants and the C4/C3 ratio along Northeast China transect (NECT) have been studied. A model to quantify their relation with environmental factors has been set up. The ratio of the number of C4 plants to that of C3 plants along NECT shows two low and two high trends from east to west, and their distribution is mainly decided by annual average temperature and precipitation. | TANG HaipingOpen Research Laboratory of Environmental Changes and Natural Disaster of the Ministry of National Education, Beijing Normal University , Beijing 100875, Laboratory of Quantitative Vegetation Ecology , Institute of Botany , Chinese Academy of Sciences , Beijing 100093, China | 1999 | Chinese Science Bulletin1999，44，14： | 16 |
| 9 | Carbon isotope ratios of C_(4) plants in loess areas of North China显示文摘Carbon isotope ratios (δ 13C) of 89 C4 plant samples were determined from the loess area in North China. δ 13C values vary between –10.5‰ and –14.6‰ with a mean of –12.6‰. Along a pre-cipitation gradient from the semi-moist area to the semiarid area, then to the arid area, the δ 13C val-ues of C4 plants show a slight decreasing trend. The δ 13C values of C4 plants in the dry season are found lower than those in the wet season. These trends are opposite to those observed for C3 spe-cies. | WANG Guoan1,2,3, HAN Jiamao 2, ZHOU Liping3, XIONG Xiaogang4, TAN Ming2, WU Zhenhai5 & PENG Jun6 1. Department of Plant Nutrition, China Agricultural University, Beijing 100094, China 2. Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China 3. College of Environmental Sciences, MOE Laboratory for Earth Surface Processes, Peking University, Beijing 100871, China 4. Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China 5. Northwest Sci-Tech University of Agriculture and Forestry, Yangling 712100, China 6. Network Center, China Agricultural University, Beijing 100094, China | 2006 | Science China Earth Sciences2006，49，1： | 16 |
| 10 | Polyphenol Oxidase, Peroxidase and PhenylalanineAmmonium Lyase Induced in Postharvest Peach Fruitsby Inoculation with Pichia membranefaciensor Rhizopus stolonifer显示文摘Rhizopus rot of peach fruits could be significantly suppressed by Pichia membranefaciens.Polyphenol oxidase (PPO), peroxidase (POD) and phenylalanine ammonium-lyase (PAL) activities inducedby inoculation with P. membranefaciens or R. stolonifer were studied in postharvest peach fruits. The activ-ities of PPO and PAL in peaches increased significantly after being inoculated with P. membranefaciens + R.stolonifer by 24 h, the activities maintained at a high level throughout the experiment. Under the condition ofinfected with R. stolonifer alone, activity of PPO and PAL could also increased, but the levels were lowerthan those treated with P. membranefaciens+ R. stolonifer. However, fruits inoculaed with P. membrane-faciens+ R. stolonifer or R. stolonifer alone did not stimulated POD activity. The results suggest that theactivation of these defense enzymes is involved in the action of P. membranefaciens against R. stolonifer. | QIN Guo-zheng, TIAN Shi-ping, LIU Hai-bo and XU Yong(Key Laboratory of Photosynthesis and Environmental Molecular Physiology, Institute of Botany , Chinese Academy of Sciences , Beijing 100093 , P. R. China) | 2002 | Agricultural Sciences in China2002，1，12： | 13 |
| 11 | New diterpenoid glucosides from Siegesbeckia pubescens显示文摘Five new diterpenoids isolated from Siegesbeckia pubescens, pubesides A^E, were established as ent-2a,15,16-trihydroxypimar-8(14)-en-2-O-b-D-glucopyranoside (1), ent-15,16,19-trihydroxypimar-8(14)-en-19-O-b-D-glucopyranoside (2), b-D-glucopyranosyl-ent-15,16-dihydroxypimar-8(14)-en-19-oiclate (3), ent-2-oxo-15,16,19-trihydroxypimar-8(14)-en-19-O-b-D-gluco-pyranoside (4), ent-2-oxo-15,16,19-trihydroxypimar-8(14)-en-19-O-b-D-glucopyranoside-15,16-acetonide (5) by 1D and 2D NMR techniques. | Jiang XIONG, Qi Duan JIN, Yun Long XU* Kunming Institute of Botany, The Chinese Academy of Sciences, Kunming 650204 | 2001 | Chinese Chemical Letters2001，12，1： | 12 |
| 12 | A Novel Hexanordammarane Glycoside from the Roots of Panax notoginseng显示文摘Notoginsenoside R10, a novel hexanordammarane glycoside was isolated from the roots of Panax nototginseng, as a minor constituent. Its structure was determined as 6-O-(?-D-glucopyranosyl)-3?,6?,12?-trihydroxy-22,23,24,25,26,27-hexanordammaran-20-one(1), by means of spectroscopic methods. | Hai Zhou LI, Rong Wei TENG, Chong Ren YANG* Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650204 | 2001 | Chinese Chemical Letters2001，12，1： | 12 |
| 13 | Toward a general evaluation model for soil respiration (GEMSR)显示文摘Soil respiration is an important component of terrestrial carbon budget. Its accurate evaluation is es- sential to the study of terrestrial carbon source/sink. Studies on soil respiration at present mostly focus on the temporal variations and the controlling factors of soil respiration, but its spatial variations and controlling factors draw less attention. Moreover, the evaluation models for soil respiration at present include only the effects of water and heat factors, while the biological and soil factors controlling soil respiration and their interactions with water and heat factors have not been considered yet. These models are not able to accurately evaluate soil respiration in different vegetation/terrestrial ecosystems at different temporal and spatial scales. Thus, a general evaluation model for soil respiration (GEMSR) including the interacting meteorological (water and heat factors), soil nutrient and biological factors is suggested in this paper, and the basic procedure developing GEMSR and the research tasks of soil respiration in the future are also discussed. | ZHOU GuangSheng, JIA BingRui, HAN GuangXuan & ZHOU Li Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China | 2008 | Science China(Life Sciences)2008，51，3： | 12 |
| 14 | Two New Indole Alkaloids from Evodia rutaecarpa显示文摘Two new indole alkaloids. wuchuyuamide Ⅰ and Ⅱ were isolated from the fruits of Evodia rutaecarpa (Juss.) Benth and their structures were elucidated on the basis of spectral data. | Guo Ying ZUO1,2 Xiao Sheng YANG 1 Xiao Jiang HAO1 (1 Laboratory of Phytochemistry. Kunming Institute of Botany, the Chinese Academy of Sciences. Kunming 650204 2Kunming 43 Hospital. PLA, Kunming 650032) | 2000 | Chinese Chemical Letters2000，11，2： | 12 |
| 15 | Production of β-1,3-glucanase and chitinase of two biocon-trol agents and their possible modes of action显示文摘Pichia membranefaciens Hansen and Candida guilliermondii (Cast) Langeronet Guerra are two antagonists of R. stolonifer on harvested nectarine and peach fruits. In this study, β-1,3-glucanase and chitinase activities of the antagonists were induced in vitro and in vivo. The highest β-1, 3-glucanase activity was detected in Lilly-Barnett minimal salt medium supplemented with glucose in combination with CWP of R. stolonifer as a carbon source. The β-1,3-glucanase activity of P. membranefaciens reached the maximum level, being 114.0 SU (specific activity unit), and that of C. guilliermondii reached 103.2 SU. The lowest β-1,3-glucanase activity was observed in the medium containing glucose as sole car-bon source. P. membranefaciens was able to produce signifi-cantly higher levels of chitinase (exochitinase and endochiti-nase) in vitro than C. guilliermondii grown in Czapeck mini-mal medium. An increase in β-1,3-glucanase and chitinase activity was also triggered by wounding, adding of carbon sources | FAN Qing, TIAN Shiping, LIU Haibo & XU YongInstitute of Botany, Chinese Academy of Sciences, Beijing 100093, China | 2002 | Chinese Science Bulletin2002，47，4： | 11 |
| 16 | Identification of seed-specific promoter nap300 and its comparison with 7S promoter显示文摘By fusing seed-specific promoter nap300 with β-glucuronidase gene, it was found that this about 300bp DNA fragment was sufficient to direct seed-specific gene expression. The substitution mutation in both distB and proxB elements had a little effect on the expression efficiency and almost no effect on the organ-specific expression pattern. In the experiment designed to compare nap300 with 7S promoter, the result showed that tissue specificity for nap300 was higher than that for 7S, and its expression level was lower than 7S's. There was no big difference in their expression pattern, and the maximal activity stage for the two promoters was identical, which indicated they could be used simultaneously for expressing different foreign genes in seeds. | ZHANG Jingyu, LI Li and SONG Yanru(Key Laboratory of Photosynthesis and Enviromental Molecular Physiology, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China) | 2002 | Progress in Natural Science:Materials International2002，12，10： | 9 |
| 17 | Influences of double aerial CO_2 concentration on plant root surface area and viability and infection intensity of vesicular-arbuscular mycorrhizal fungi显示文摘Using recently developed methods for root research, an investigation initiated concerning effects of doubled atmospheric CO2 concentration on root surface area and infection of vesicular-arbuscular mycorrhizal (VAM) fungi in seedlings of maize, wheat and soybean. Results showed that doubled CO2 concentration significantly extended root system surface area and promoted VAM fungal infection intensity and viability. However, interspecific variation existed in these responses. It is suggested that plant community succession would be changed due to altered characteristics of roots among species in the future climate. | WANG Xingfen, LI Shiyi, BAI Kezhi KUANG TingyunInstitute of Botany, Chinese Academy of Sciences, Beijing 100093, China Corresponding author | 1999 | Chinese Science Bulletin1999，44，1： | 8 |
| 18 | The role of MC1R gene in buffalo coat color显示文摘Melanocortin-1 receptor (MC1R) plays a major role in pigmentation in many species.To investigate if the MC1R gene is associated with coat color in water buffalo,the coding region of MC1R gene of 216 buffalo samples was sequenced,which included 49 black river buffalo (Murrah and Nili-Ravi),136 swamp buffalo (Dehong,Diandongnan,Dechang,Guizhou,and Xilin) with white and gray body,and 31 hybrid offspring of river buffalo Nili-Ravi (or Murrah) and swamp buffalo.Among the three variation sites found,SNP684 was synonymous,while SNP310 and SNP384 were nonsynonymous,leading to p.S104G and p.I128M changes,respectively.Only Individuals carrying homozygote EBR/EBR were black.The genotype and phenotype analysis of the hybrid offspring of black river buffalo and gray swamp buffalo further revealed that the river buffalo type allele EBR or the allele carrying the amino acid p.104S was important for the full function of MC1R.The in silico functional analysis showed that the amino acid substitutions p.G104S and p.M128I had significant impact on the function of MC1R.Above results indicate that the allele EBR or the allele carrying the amino acid p.104S was associated with the black coat color in buffalo. | MIAO YongWang1,2,WU GuiSheng3,WANG Lei2,LI DaLin4,TANG ShouKun5,LIANG JianPing2,MAO HuaMing2,LUO HuaiRong3 & ZHANG YaPing1,6 1 Laboratory for Conservation and Utilization of Bio-resource,Yunnan University,Kunming 650091,China 2 Faculty of Animal Science and Technology,Yunnan Agricultural University,Kunming 650201,China 3 Kunming Institute of Botany,Chinese Academy of Sciences,Kunming 650204,China 4 Yunnan Institute of Buffalo Science and Technology,Kunming 650021,China 5 Animal Husbandry and Veterinary Station of Luxi city,Luxi 678400,China 6 State Key Laboratory of Genetic Resources and Evolution,Kunming Institute of Zoology,Chinese Academy of Sciences,Kunming 650223,China | 2010 | Science China(Life Sciences)2010，53，2： | 8 |
| 19 | Responses of soil respiration in non-growing seasons to environmental factors in a maize agroecosystem,Northeast China显示文摘Based on continuous three-year measurements (from 2004 to 2007) of eddy covariance and related environmental factors, environmental controls on variation in soil respiration (Rs) during non-growing season were explored in a maize agroecosystem in Northeast China. Our results indicated that during non-growing seasons, daily Rs was 1.08-4.08 g CO2 m-2 d-1, and the lowest occurred in late November. The average Rs of non-growing season was 456.06 ± 20.01 g CO2 m-2, accounting for 11% of the gross primary production (GPP) of the growing season. Additionally, at monthly scale, the lowest value of Rs appeared in January or February. From the beginning to the end of non-growing season, daily Rs tended to decrease first, and then increase to the highest. There was a significant quadratic curve relationship between Rs and soil temperature at 10 cm depth when soil temperature was more than 0°C (P<0.001), with the explaining ratio of 38%-70%. When soil water content was more than 0.1 m3 m-3, soil moisture at 10 cm depth was significantly parabolically correlated with Rs (P<0.001), explaining the rate of 18%-60%. Based on all the data of soil temperature of more than 0°C, a better model for Rs was established by coupling soil temperature and moisture, which could explain the rate of up to 53%-79%. Meanwhile, the standard error of regression estimation between the values of prediction and observation for Rs could reach 2.7%-11.8%. Rs in non-growing season can account for 22.4% of Rs in growing season, indicating that it plays a critical role in assessing the carbon budget in maize agroecosystem, Northeast China. | LI RongPing1,2,3, ZHOU GuangSheng1,4 & WANG Yu1,3 1 State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China 2 Institute of Atmospheric Environment, China Meteorological Administration, Shenyang 110016, China 3 Graduate University of Chinese Academy of Sciences, Beijing 100049, China 4 Chinese Academy of Meteorological Sciences, Beijing 100081, China | 2010 | Chinese Science Bulletin2010，55，24： | 7 |
| 20 | Relationship between stomatal density and the changes of atmospheric CO_2 concentrations显示文摘The relationship between the stomatal density of five woody plants endemic to China, i.e. Eucommia ulmoides, Quercus liaotungensis, Q. glandulifera var. brevipetiolata, Cyclocarya paliurus and Ficus heteromorpha, and the atmospheric CO-2 concentrations was studied by observations on leaves of the herbarium-stored specimens(1920s-1990s). The results showed that the stomatal density in Eucommia ulmoides, Quercus liaotungensis and Q. glandulifera% var. brevipetiolata decreased significantly in response to the elevated atmospheric CO-2 concentrations, while in Cyclocarya paliurus it decreased slightly and in Ficus heteromorpha there were no responses. | HE Xinqiang, LIN Yuehui, LIN Jinxing and HU YuxiInstitute of Botany, Chinese Academy of Sciences, Beijing, 100093, China | 1998 | Chinese Science Bulletin1998，43，11： | 7 |
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