| 外源ABA预处理对Pb胁迫下水稻种子萌发的影响 |
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| 引用本文： | 赵鹂,夏更寿,李莉萍. 外源ABA预处理对Pb胁迫下水稻种子萌发的影响[J]. 上海交通大学学报(农业科学版), 2008, 26(2): 153-157 |
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| 作者姓名： | 赵鹂 夏更寿 李莉萍 |
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| 作者单位： | 丽水学院,丽水,323000;浙江大学,生命科学学院,杭州310058 |
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| 摘 要： | 以水稻南京40品种（Oryza sativaL．cv．Nanjing40）为材料，研究了外源ABA处理对Pb胁迫下水稻种子萌发的影响。研究结果表明：Pb胁迫条件下水稻种子萌发活力严重受损，且随Pb浓度的增加而加剧，其中胚根生长的抑制程度较胚芽更为显著。低浓度的外源ABA预处理能够有效恢复Pb胁迫条件下种子萌发活力的降低，提高种子发芽率、发芽势、发芽指数和活力指数，而且胚根、胚芽生长抑制得到了缓解，根系氧化能力也得以恢复。胚芽中Pb含量的降低揭示低浓度的ABA是通过减少Pb由胚根向胚芽的输送来降低Pb毒害作用的．
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| 关 键 词： | ABA Pb 萌发 水稻种子 重金属 |
| 文章编号： | 1671-9964(2008)02-0153-04 |
| 修稿时间： | 2007-11-20 |
Effects of Exogenous ABA on Seed Germination and Seedling Growth of Rice under Pb Stress |
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| ZHAO Li XIA Geng-shou LI Li-ping. Effects of Exogenous ABA on Seed Germination and Seedling Growth of Rice under Pb Stress[J]. Journal of Shanghai Jiaotong University (Agricultural Science), 2008, 26(2): 153-157 |
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| Authors: | ZHAO Li XIA Geng-shou LI Li-ping |
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| Affiliation: | ZHAO Li~1 XIA Geng-shou~1 LI Li-ping~2 (1.Lishui University,Lishui 323000,China,2.College of Life Sciences,Zhejiang University,Hangzhou 310058,China) |
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| Abstract: | The effects of exogenous ABA on seed germination and seedling growth of rice under Pb stress were studied using a com- mon cultivar Oryza sativa L cv.Nanjing40.The results show that Pb stress damage the vigor of rice seed seriousely,the damage ag- gravate as the increasing of the Pb concentration,the length inhibition of radicle is more obviously than embryo.Low concentration of exogenous ABA pretreatment recover the vigor of rece seed significantly and improve germination rate,germination trend,germination... |
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| Keywords: | ABA Pb germination rice seeds heavy metal |
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