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| 1 | 镉对两品种玉豆生长和抗氧化酶的影响显示文摘利用水培盆栽试验,研究了不同浓度的镉胁迫对两种(优选和特选)玉豆(Phaseolus vulgaris Linn)株高、植株生物量、根构型和叶片中抗氧化酶活性的影响。结果表明:镉胁迫显著抑制了两种玉豆的株高、生物量、总根长、总根表面积、根平均直径和根总体积,且对特选玉豆的抑制程度大于优选玉豆;镉胁迫使两种玉豆的丙二醛(Malondialdehyde,MDA)含量和过氧化物酶(Peroxidase,POD)活性持续增强,超氧化物歧化酶(Superoxide dismutase,SOD)活性则呈现低浓度增加高浓度下降的趋势;特选玉豆的过氧化氢酶(Catalase,CAT)活性呈低浓度增加高浓度下降趋势,但优选玉豆的CAT活性则持续增强,且特选玉豆的MDA含量、SOD活性和CAT活性的变化幅度都大于优选玉豆,但优选玉豆的POD活性大于特选玉豆。上述结果说明优选玉豆对镉胁迫的耐性高于特选玉豆。 | 李冬琴 陈桂葵 郑海 黎华寿 李小兵 | 2015 | 农业环境科学学报2015，34，2： | 28 |
| 2 | 沉水植物对沉积物微生物群落结构影响:以洪泽湖湿地为例显示文摘应用磷脂脂肪酸(PLFA)方法分析洪泽湖湿地典型沉水植物菹草群丛、蓖齿眼子菜群丛、菹-蓖混丛对其根系沉积物微生物群落结构的影响,以期了解沉水植物种类以及在不同生长时期对沉积物微生物群落结构的影响规律.结果表明,植物群丛根系沉积物PLFA总量在不同的时期发生了明显的变化,而同一时期的不同群丛PLFA总量差异不显著.沉积物微生物群落结构受沉水植物根系影响,菹草群丛中G^+/G^-(革兰氏阳性菌/革兰氏阴性菌)在3个不同生长时期比值为0.74、1.35、1.26,蓖齿眼子菜群丛G^+/G^-比值为0.89、0.98、1.49,菹-蓖混合群丛G^+/G^-比值为0.95、1.39、1.35,其G^+/G^-的变化和植物根系生长有密切关系.沉积物微生物群落结构受环境因子的影响,环境因子如T、p H、TOC、DO等与沉积物PLFA中特征磷脂存在相关性. | 张丁予 章婷曦 董丹萍 李德芳 王国祥 | 2016 | 环境科学2016，37，5： | 13 |
| 3 | Illumina-Based Analysis of Bulk and Rhizosphere Soil Bacterial Communities in Paddy Fields Under Mixed Heavy Metal Contamination显示文摘There is an increasing concern about rice(Oryza sativa L.) soil microbiomes under the influence of mixed heavy metal contamination. We used the high-throughput Illumina Mi Seq sequencing approach to explore the bacterial diversity and community composition of soils in four paddy fields, exhibiting four degrees of mixed heavy metal(Cd, Pb and Zn) pollution, and examined the effects of these metals on the bacterial communities. Our results showed that up to 2 104 to 4 359 bacterial operational taxonomic units(OTUs)were found in the bulk and rhizosphere soils of the paddy fields, with the dominant bacterial phyla(greater than 1% of the overall community) including Proteobacteria, Actinobacteria, Firmicutes, Acidobacteria, Gemmatimonadetes, Chloroflexi, Bacteroidetes and Nitrospirae. A number of rare and candidate bacterial groups were also detected, and Saprospirales, HOC36, SC-I-84 and Anaerospora were rarely detected in rice paddy soils. Venn diagram analysis showed that 174 bacterial OTUs were shared among the bulk soils with four pollution degrees. Rice rhizosphere soils displayed higher bacterial diversity indices(ACE and Chao 1) and more unique OTUs than bulk soils. Total Cd and Zn in the soils were significantly negatively correlated with ACE and Chao 1, respectively, and the Mantel test suggested that total Pb, total Zn, p H, total nitrogen and total phosphorus significantly affected the community structure.Overall, these results provided baseline data for the bacterial communities in bulk and rhizosphere soils of paddy fields contaminated with mixed heavy metals. | HE Huaidong LI Waichin Riqing YU YE Zhihong | 2017 | Pedosphere2017，27，3： | 10 |
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