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1细胞壁在植物重金属耐性中的作用显示文摘植物细胞壁主要是由多糖、蛋白质和木质素等组成的一个复合体,广泛参与植物生长发育及对各种逆境胁迫的响应,是重金属离子进入细胞质的第一道屏障。本文主要综述了植物细胞壁主要成分,包括细胞壁多糖、细胞壁蛋白质和木质素,在响应重金属胁迫反应中的作用及其参与重金属耐性的机制,以期能对植物细胞壁在重金属耐性中的作用有更深入的了解。刘清泉 陈亚华 沈振国 郑录庆 2014植物生理学报2014,50,5:52
2Contribution of phenylpropanoid metabolism to plant development and plant–environment interactions显示文摘Phenylpropanoid metabolism is one of the most important metabolisms in plants, yielding more than 8,000 metabolites contributing to plant development and plant-environment interplay.Phenylpropanoid metabolism materialized during the evolution of early freshwater algae that were initiating terrestrialization and land plants have evolved multiple branches of this pathway, which give rise to metabolites including lignin, flavonoids, lignans, phenylpropanoid esters, hydroxycinnamic acid amides, and sporopollenin.Recent studies have revealed that many factors participate in the regulation of phenylpropanoid metabolism, and modulate phenylpropanoid homeostasis when plants undergo successive developmental processes and are subjected to stressful environments. In this review, we summarize recent progress on elucidating the contribution of phenylpropanoid metabolism to the coordination of plant development and plant–environment interaction, and metabolic flux redirection among diverse metabolic routes. In addition, our review focuses on the regulation of phenylpropanoid metabolism at the transcriptional, post-transcriptional, post-translational,and epigenetic levels, and in response to phytohormones and biotic and abiotic stresses.Nai-Qian Dong Hong-Xuan Lin 2021Journal of Integrative Plant Biology2021,63,1:43
3植物食品原料中酚酸的生物合成与调控及其生物活性研究进展显示文摘酚酸是高等植物中广泛分布的含有酚羟基和羧基的一类次生代谢产物,主要通过酯键及醚键与细胞壁结构组分以结合态存在于植物食品原料中,具有抗氧化、抗菌和抗癌等多种生物活性。植物食品原料中的酚类物质已成为当前食品领域研究热点之一。通过一系列生物调控技术能够在植物食品原料中富集酚酸,从而提高其营养价值。本文综述了植物食品原料中酚酸的类型与结构、生物合成与调控及其生物活性,并对此进行了展望。陈志杰 吴嘉琪 马燕 王沛 顾振新 杨润强 2018食品科学2018,39,7:20
4Roles of lignin biosynthesis and regulatory genes in plant development显示文摘Lignin is an important factor affecting agricultural traits,biofuel production,and the pulping industry.Most lignin biosynthesis genes and their regulatory genes are expressed mainly in the vascular bundles of stems and leaves,preferentially in tissues undergoing lignification.Other genes are poorly expressed during normal stages of development,but are strongly induced by abiotic or biotic stresses.Some are expressed in non-lignifying tissues such as the shoot apical meristem.Alterations in lignin levels affect plant development.Suppression of lignin biosynthesis genes causes abnormal phenotypes such as collapsed xylem,bending stems,and growth retardation.The loss of expression by genes that function early in the lignin biosynthesis pathway results in more severe developmental phenotypes when compared with plants that have mutations in later genes.Defective lignin deposition is also associated with phenotypes of seed shattering or brittle culm.MYB and NAC transcriptional factors function as switches,and some homeobox proteins negatively control lignin biosynthesis genes.Ectopic deposition caused by overexpression of lignin biosynthesis genes or master switch genes induces curly leaf formation and dwarfism.Jinmi Yoon Heebak Choi Gynheung An 2015Journal of Integrative Plant Biology2015,57,11:17
5植物响应非生物胁迫的分子机制显示文摘通过对现有研究的梳理和分析,综述植物应答极端温度、干旱、水淹和盐胁迫的分子机制。结合不同非生物胁迫对植物生长发育的影响,介绍植物响应逆境的信号感知方式和信号转导途径;分析基因表达调控过程中重要转录因子的调控机制以及胁迫耐受性产生期间重要次生代谢产物的作用方式。最后,从多信号网络调控机制以及农业可持续发展的角度,对未来的研究方向作了展望。陈柯岐 邓星光 林宏辉 2021生物学杂志2021,38,6:14
6高温干旱下油菜的木质化应答及其在茎与根中的差异显示文摘以正常生长和高温干旱复合胁迫下甘蓝型油菜中双10号的茎和根为材料,采用组织化学、生物化学、气相色谱-质谱联用(GC-MS)分析技术,研究了木质部结构和木质素成分的胁迫应答规律及其在茎和根中的差别。冰冻切片组织化学染色显示,与正常生长的网室植株(正常植株)相比,高温干旱下生长的温室植株(胁迫植株)的茎和根中木质部均显著加厚,染色更深;与此对应,溴乙酰法测定的茎木质素总量比对照增加31.64%。此外,胁迫茎中的导管孔径明显变小,但根中的导管孔径和导管数量均明显增加。硫代酸解法测定木质素单体表明,胁迫茎中被解离出的木质素单体总量比对照降低40.08%,说明有更高的缩合键比例;S/G值(1.82)比对照(1.29)大大增高,说明S型木质素比例增加而G型木质素比例下降。油菜茎与根木质化性状比较显示,根木质素比茎木质素含有更高比例的缩合键,茎中S型木质素占主体(S/G=1.29),而根中G型木质素占主体(S/G=0.49)且H型木质素含量(7.43%)比茎中(0.83%)高近10倍。H型和G型木质素单体的苯环甲基化程度比S型低,单体间更容易形成缩合键,根中高比例H型和G型木质素单体可能是导致其具有高比例缩合键的主要原因。尹能文 李加纳 刘雪 练剑平 付春 李威 蒋佳怡 薛雨飞 王君 柴友荣 2017作物学报2017,43,11:12
7低温胁迫下烟苗多酚代谢及其抗氧化能力分析显示文摘为了明确在低温胁迫条件下烟苗中多酚物质代谢与抗氧化能力的关系,本研究以烟草K326为材料,对比分析了低温胁迫处理(4℃)和对照处理(25℃)烟苗叶片中多酚物质含量及其代谢酶活性和基因表达水平变化与植物抗氧化酶活性的关系。结果表明,低温胁迫处理后,烟草叶片萎蔫、细胞膜损伤严重,相对电导率升高;总酚含量受低温胁迫影响较小,木质素含量显著增加(p<0.05);低温处理后,SOD活性显著升高(p<0.05),CAT活性和总抗氧化能力(T-AOC)均低于对照;PAL、HCT和POD酶活性均升高,PAL、HCT和POD基因表达水平均上调。以上结果表明,低温胁迫促进烟苗多酚代谢中木质素合成,通过提高木质素含量增强细胞壁的保护作用是植物抵御环境胁迫的重要机制。周培禄 刘光亮 王树声 李琦瑶 许娜 王程栋 杨银菊 曾文龙 陈爱国 2018中国烟草科学2018,39,5:10
8Phosphorylation of LTF1, an MYB Transcription Factor in Populus, Acts as a Sensory Switch Regulating Lignin Biosynthesis in Wood Cells显示文摘Lignin is specifically deposited in plant secondary cell walls,and initiation of lignin biosynthesis is regulated by a variety of developmental and environmental signals.However,the mechanisms governing the regulation of lignin biosynthesis remain to be elucidated.In this study,we identified a lignin biosynthesis-associated transcription factor(LTF)from Populus,LTF1,which binds the promoter of a key lignin biosynthetic gene encoding 4-coumarate-CoA ligase(4CL).We showed that LTF1 in its unphosphorylated state functions as a regulator restraining lignin biosynthesis.When LTF1 becomes phosphorylated by PdMPK6 in response to external stimuli such as wounding,it undergoes degradation through a proteasome pathway,resulting in activation of lignification.Expression of a phosphorylation-null mutant version of LTF1 led to stable protein accumulation and persistent attenuation of lignification in wood cells.Taken together,our study reveals a mechanism whereby LTF1 phosphorylation acts as a sensory switch to regulate lignin biosynthesis in response to environmental stimuli.The discovery of novel modulators and mechanisms modifying lignin biosynthesis has important implications for improving the utilization of cell-wall biomass.Jinshan Gui Laifu Luo Yu Zhong Jiayan Sun Toshiaki Umezawa Laigeng Li 2019Molecular Plant2019,12,10:10
9Survey of Genomics Approaches to Improve Bioenergy Traits in Maize,Sorghum and Sugarcane显示文摘Bioenergy crops currently provide the only source of alternative energy with the potential to reduce the use of fossil transportation fuels in a way that is compatible with existing engine technology,including in developing countries.Even though bioenergy research is currently receiving considerable attention,many of the concepts are not new,but rather build on intense research efforts from 30 years ago.A major difference with that era is the availability of genomics tools that have the potential to accelerate crop improvement significantly.This review is focused on maize,sorghum and sugarcane as representatives of bioenergy grasses that produce sugar and/or lignocellulosic biomass.Examples of how genetic mapping,forward and reverse genetics,highthroughput expression profiling and comparative genomics can be used to unravel and improve bioenergy traits will be presented.Wilfred Vermerris 2011Journal of Integrative Plant Biology2011,53,2:9
10植物盐胁迫的信号调控机制显示文摘盐胁迫会引起渗透胁迫、离子毒害和次级胁迫,极大危害到植物的生存。之前的研究中,借助于分子生物学和遗传学手段,已经鉴定出多个基因参与到盐胁迫信号通路的调控,其中SOS途径是主要的植物抗盐调节机制。氨基酸、甜菜碱、可溶性糖等渗透调节物质,脯氨酸、多胺等信号小分子,SOD、CAT等抗氧化酶,HKT等离子通道蛋白均参与到了植物对盐胁迫的响应。本研究总结了盐胁迫条件下植物调控离子平衡、氧化胁迫、生长发育的最新研究进展,为之后的研究提供依据。秦晓惠 段志坤 2019基因组学与应用生物学2019,38,8:9
11种植密度对2个青稞品种抗倒伏及秸秆饲用特性的影响显示文摘种植密度是影响青稞抗倒伏和秸秆饲用特性的重要因子。以抗倒伏品种昆仑14号和倒伏品种门源亮蓝为试验材料,比较研究种植密度对这2个品种生长发育、抗倒伏特性和秸秆饲用特性的影响。结果表明,种植密度对2个品种的抗倒伏和秸秆饲用特性的影响存在差异。随着种植密度的增加,昆仑14号根长、根体积、根数和根干重先增后降,茎粗和壁厚依次下降;门源亮蓝根系和茎秆相关指标则随种植密度增大而下降。昆仑14号抗倒伏相关指标先增后降,但整个生育期未发生倒伏;门源亮蓝各指标均显著降低,诱发倒伏现象提前发生,致使倒伏率增大、倒伏程度加剧。昆仑14号茎秆中性洗涤纤维、酸性洗涤纤维、半纤维素、纤维素和木质素等化学成分含量随密度增加先增后降,门源亮蓝各成分含量呈下降趋势,相对饲喂价值随密度增加呈现增高的趋势。综合抗倒伏特性与秸秆饲用特性,昆仑14号最佳种植密度为375×10^4株hm^-2,门源亮蓝粮饲兼用时适宜密度为300×10^4~375×10^4株hm^-2。赵小红 白羿雄 王凯 姚有华 姚晓华 吴昆仑 2020作物学报2020,46,4:9
12不同种植密度对机采辣椒品种性状和产量的影响显示文摘为明确不同种植密度对机采辣椒品种性状、产量的影响,以适宜机采的辣椒‘辣研102’为研究对象,设置4个种植密度(P0:38480株/hm^(2)、P1:51307株/hm^(2)、P2:76961株/hm^(2)、P3:102615株/hm^(2)),分别于贵阳、遵义两地开展田间小区试验。结果表明,随着种植密度的增加,辣椒株高呈增加趋势,茎粗呈下降趋势。辣椒根部、地上部生物量均在高密植条件下(P3)时达到最小。辣椒的发病率与病情指数均随种植密度的增加而显著提高,高密植处理条件下(P3)达到最大,发病率分别为41.67%(贵阳)、43.33%(遵义),病情指数分别为31.05%(贵阳)、29.86%(遵义)。过高的种植密度导致单株辣椒光合作用大幅下降:P1、P2、P3处理条件下光合速率分别较P0处理显著降低13.94%、24.73%、29.66%(遵义);P1、P2、P3处理条件下辣椒叶片蒸腾速率较P0降低10.02%、19.81%、42.12%(贵阳)。辣椒总产量随种植密度增加而显著提高,而商品果产量随种植密度的增加呈先增加后降低的趋势。商品果产量在P1条件下获得最大值,相对于P0、P2、P3贵阳辣椒商品果产量显著提高了16.43%、32.81%、41.67%,遵义提高了20.25%、26.67%、61.02%。综合辣椒生长与商品果产量,贵州机采辣椒‘辣研102’最佳种植密度为51307株/hm^(2)。王岩 牟玉梅 张爱民 邢丹 郭涛 2021热带作物学报2021,42,5:9
13The interaction of CpEBF1 with CpMADSs is involved in cell wall degradation during papaya fruit ripening显示文摘Ethylene plays a pivotal role in climacteric fruit ripening;whereas 1-MCP,a non-toxic antagonist of ethylene,prevents ethylene-dependent responses and fruit ripening.In this study,a short-term treatment(1 h)with 400 nL L^(−1)1-MCP delayed the ripening of harvested papaya.However,long-term application of 1-MCP(400 nL L^(−1),16 h)resulted in abnormal fruit ripening,with the fruits exhibiting normal yellowing without softening,significantly higher cellulose and lignin contents,and intact cell walls(CW).Furthermore,we found that long-term treatment with 1-MCP significantly inhibited the expression of CpEBF1,an EIN3-binding F-box-1 gene.A protein interaction analysis using yeast two-hybrid,BiFC and GST pull-down assays showed that CpEBF1 interacts with the CpMADS1/3 and CpEIL1 proteins.The interaction of CpEBF1 with CpMADS1/3 further activated the activities of CW-degradation gene promoters.Subcellular localization showed that these proteins were localized in the nucleus.Additionally,the expression levels of CpMADS1/3,CpEIL1,and several CW-degradation-related genes were significantly downregulated by long-term 1-MCP treatment.Therefore,we propose that the inhibited expression of CpEBF1 and CpMADS1/3 resulted in the repressed activation of CW-degradation-related genes via their interaction,thereby resulting in fruit softening disorders.Xiaochun Ding Xiaoyang Zhu Lanlan Ye Shuangling Xiao Zhenxian Wu Weixin Chen Xueping Li 2019Horticulture Research2019,6,1:7
14桑叶菜采后商品化处理前的品质变化规律显示文摘该文以新鲜桑叶菜为原料,采用自发气调包装技术贮藏,研究了采后处理时间间隔(1、2、4 h)对桑叶菜品质的影响。结果发现,随着采后处理时间间隔的延长,桑叶菜的可溶性糖、可溶性蛋白、VC和多酚等含量降低,木质素含量和硬度等逐渐增加,细胞膜透性增大和丙二醛积累加剧。这些结果表明,采后处理时间间隔的延长会加速桑叶菜采后品质劣变,不利于后续贮藏过程中品质的维持,桑叶菜采后商品化处理前的品质变化规律的明确,有望为桑叶菜采后商品化处理及贮运保鲜提供理论基础。杨腾达 陈飞平 陈于陇 孔念晴 曾凡坤 2019食品与发酵工业2019,45,22:7
15木质素及其合成基因在作物抗倒伏中的功能及其研究进展显示文摘木质素是植物细胞壁中提供结构支持、增加细胞强度和茎秆强度的重要成分,其含量仅次于纤维素。鉴于木质素在增加植物细胞壁强度和茎秆抗弯折力方面的作用,常将其作为研究作物抗倒伏性的切入点。通过对木质素生物合成途径关键酶的研究,能更好地揭示木质素含量及木质素合成关键基因在作物抗倒伏方面的功能,为作物抗逆育种提供理论支持。本综述主要概括总结了木质素生物合成途径和相关基因在植物抗倒伏方面的功能及其研究进展。刘欣婷 王娟 侯献飞 李强 贾东海 顾元国 兰海燕 2019分子植物育种2019,17,2:7
16套袋对翠冠果实外果皮褐斑形成结构及生理影响显示文摘套袋技术是提高梨果实外观品质的有效手段,为了探明梨果实发育期到成熟期套袋对锈斑发生的抑制机理,以半锈砂梨翠冠为试材,套袋果实为处理,不套袋果实为对照,观测果实发育期到成熟期锈斑的发生进程、测定不同时期果实外果皮果锈指数、木质素含量及相关合成代谢酶PAL酶、4CL酶、C4H酶、CAD酶、POD酶的活性。结果表明:套袋后梨果实外果皮锈斑发生进程明显减缓且程度轻,套袋果实锈斑发生在盛花后50 d,比不套袋(对照)晚20 d;果实迅速膨大期(盛花后70 d),套袋果实与不套袋(对照)果锈指数差异最大,套袋果锈指数减少41.67%;不套袋的翠冠褐斑严重,外果皮中木质素单体含量以及木质素合成代谢关键酶(PAL酶、4CL酶、CAD酶、C4H酶)活性普遍高于套袋翠冠果实外果皮。施春晖 王晓庆 张学英 骆军 2018江西农业学报2018,30,8:7
17Water limitation and rootstock genotype interact to alter grape berry metabolism through transcriptome reprogramming显示文摘Grapevine is a perennial crop often cultivated by grafting a scion cultivar on a suitable rootstock.Rootstocks influence scions,particularly with regard to water uptake and vigor.Therefore,one of the possibilities to adapt viticulture to the extended drought stress periods is to select rootstocks conferring increased tolerance to drought.However,the molecular mechanisms associated with the ability of rootstock/scion combination to influence grape berry metabolism under drought stress are still poorly understood.The transcriptomic changes induced by drought stress in grape berries(cv.Pinot noir)from vines grafted on either 110R(drought-tolerant)or 125AA(drought-sensitive)rootstock were compared.The experiments were conducted in the vineyard for two years and two grape berry developmental stages(50%and 100%veraison).The genome-wide microarray approach showed that water stress strongly impacts gene expression in the berries,through ontology categories that cover cell wall metabolism,primary and secondary metabolism,signaling,stress,and hormones,and that some of these effects strongly depend on the rootstock genotype.Indeed,under drought stress,berries from vines grafted on 110R displayed a different transcriptional response compared to 125AA-concerning genes related to jasmonate(JA),phenylpropanoid metabolism,and pathogenesis-related proteins.The data also suggest a link between JA and secondary metabolism in water-stressed berries.Overall,genes related to secondary metabolism and JA are more induced and/or less repressed by drought stress in the berries grafted on the drought-sensitive rootstock 125AA.These rootstock-dependent gene expression changes are relevant for berry composition and sensory properties.Mariam Berdeja Philippe Nicolas Christian Kappel Zhan Wu Dai Ghislaine Hilbert Anthony Peccoux Magali Lafontaine Nathalie Ollat Eric Gomès Serge Delrot 2015Horticulture Research2015,2,1:5
18QCM实时监测五价砷胁迫对水稻悬浮细胞粘弹性的影响显示文摘本文通过QCM技术实时监测水稻悬浮细胞在不同浓度五价砷连续及单独胁迫下的粘弹性变化,从细胞整体水平评估了重金属对水稻悬浮细胞力学性质的影响。结果表明:1)在2~10 mmol/L范围内,五价砷对水稻悬浮细胞的连续和单独胁迫的影响均随着浓度增加而增强;2)在连续胁迫和单独胁迫下,随着五价砷浓度的增加,水稻悬浮细胞粘弹性指数均下降,细胞软硬度减小即细胞变软;3)在五价砷连续梯度浓度胁迫下,水稻悬浮细胞粘弹性指数呈梯度下降;4)在五价砷不同浓度单独胁迫下,随着五价砷浓度的增加,水稻悬浮细胞粘弹性指数变化逐渐平缓,即水稻悬浮细胞随着五价砷浓度升高,敏感程度降低。以期建立一种用来衡量重金属胁迫对植物影响的一种新方法。周菲 周铁安 潘炜松 2019激光生物学报2019,28,5:3
19OsIDD2, a zinc finger and INDETERMINATE DOMAIN protein, regulates secondary cell wall formation显示文摘Previously, we found 123 transcription factors(TFs) as candidate regulators of secondary cell wall(SCW)formation in rice by using phylogenetic and co-expression network analyses. Among them, we examined in this work the role of OsIDD_2, a zinc finger and indeterminate domain(IDD) family TF. Its overexpressors showed dwarfism, fragile leaves, and decreased lignin content, which are typical phenotypes of plants defective in SCW formation, whereas its knockout plants showed slightly increased lignin content.The RNA-seq and quantitative reverse transcription polymerase chain reaction analyses confirmed that some lignin biosynthetic genes were downregulated in the OsIDD_2-overexpressing plants, and revealed the same case for other genes involved in cellulose synthesis and sucrose metabolism. The transient expression assay using rice protoplasts revealed that OsIDD_2 negatively regulates the transcription of genes involved in lignin biosynthesis, cinnamyl alcohol dehydrogenase 2 and 3(CAD_2 and 3), and sucrose metabolism, sucrose synthase 5(SUS_5), whereas an Alpha Screen assay, which can detect the interaction between TFs and their target DNA sequences, directly confirmed the interaction between OsIDD_2 and the target sequences located in the promoter regions of CAD_2 and CAD_3. Based on these observations, we conclude that OsIDD_2 is negatively involved in SCW formation and other biological events by downregulating its target genes.Peng Huang Hideki Yoshida Kenji Yano Shunsuke Kinoshita Kyosuke Kawai Eriko Koketsu Masako Hattori Sayaka Takehara Ji Huang Ko Hirano Reynante Lacsamana Ordonio Makoto Matsuoka Miyako Ueguchi-Tanaka 2018Journal of Integrative Plant Biology2018,60,2:3
20不同贮藏温度对糙皮侧耳采后品质及木质素积累的影响显示文摘以糙皮侧耳早秋615为试验材料,将其置于自然敞口的聚乙烯(PE)保鲜袋中,分析1℃和5℃贮藏期间糙皮侧耳的硬度、失重率、丙二醛(MDA)含量、抗氧化酶活性、营养物质含量和木质素合成相关酶活性等指标的变化。结果表明,1℃贮藏的糙皮侧耳能更好地抑制失重率、MDA含量、可溶性糖和总酚含量的增加;维持较高的硬度、可溶性蛋白质、纤维素和木质素含量;提高过氧化物酶(POD)、苯丙氨酸解氨酶(PAL)、肉桂醇脱氢酶(CAD)和贮藏前期过氧化氢酶(CAT)活性。由此表明,低温贮藏能更好地维持采后糙皮侧耳的贮藏品质,促进木质素的生物合成和积累,以1℃低温贮藏的糙皮侧耳品质更优。李甜竹 孙玉文 汪季涛 甘德芳 胡克玲 2021浙江农业学报2021,33,2:3
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