| 水分胁迫下外源ABA提高甘蔗抗旱性的作用机制 |
| |
| 引用本文： | 李长宁,农倩,李杨瑞.水分胁迫下外源ABA提高甘蔗抗旱性的作用机制[J].作物学报,2010,36(5):863-870. |
| |
| 作者姓名： | 李长宁 农倩 李杨瑞 |
| |
| 作者单位： | 1 广西大学农学院，广西南宁530004；2广西作物遗传改良生物技术重点开放实验室，广西南宁530007 |
| |
| 基金项目： | 广西农业科学院博士后研究专项，广西科技攻关项目，国家科技支撑计划，现代农业产业技术体系建设专项资金资助 |
| |
| 摘 要： | 以抗旱甘蔗品种ROC22为材料，调查水分胁迫及胁迫加喷施脱落酸(ABA)对甘蔗内源ABA合成及相关生理生化作用的影响。结果表明，干旱及干旱加外施ABA的条件下，甘蔗内源ABA合成水平上升，但干旱加ABA处理增幅更显著，甘蔗叶内的脯氨酸(Pro)、H2O2、丙二醛(MDA)含量增加，而ABA处理能缓解MDA的积累，使其含量处于低水平，ABA处理能防止叶绿素降解并对干旱引起的最大光能转化效率(Fv/Fm)、PSII实际量子效率(ΦPSII)下降有明显的缓解作用。干旱条件下，H2O2的积累伴随着抗氧化作用的酶CAT、GPX、GR和APX的活性提高，而ABA处理能进一步提高这些相关酶的活性而逐渐降低H2O2的含量，表明干旱条件下，外施ABA能增强甘蔗的抗氧化防护系统，提高抗旱性。
|
| 关 键 词： | ABA 甘蔗 抗旱性 H2O2 抗氧化酶 叶绿素荧光 |
| 收稿时间： | 2009-10-20 |
Mechanism of Tolerance to Drought in Sugarcane Plant Enhanced by Foliage Dressing of Abscisic Acid under Water Stress |
| |
| LI Chang-Ning,Manoj Kumar SRIVASTAVA,NONG Qian,LI Yang-Rui.Mechanism of Tolerance to Drought in Sugarcane Plant Enhanced by Foliage Dressing of Abscisic Acid under Water Stress[J].Acta Agronomica Sinica,2010,36(5):863-870. |
| |
| Authors: | LI Chang-Ning Manoj Kumar SRIVASTAVA NONG Qian LI Yang-Rui |
| |
| Affiliation: | 1.College of Agriculture,Guangxi University,Nanning 530004,China;2.Guangxi Crop Genetic Improvement and Biotechnology Laboratory,Nanning 530007,China |
| |
| Abstract: | Drought is a major limiting factor for sugarcane growth.Abscisic acid (ABA) regulates much important plant physiological and biochemical processes,and induces tolerance to different stresses including drought.Understanding the mechanism of tolerance to drought in sugarcane plant with foliage dressing of ABA under water stress would facilitate breeding and field management for improving drought resistance.Thus,an experiment was set up to investigate the interrelationship between drought induced ABA biosynthe... |
| |
| Keywords: | ABA H2O2 |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《作物学报》浏览原始摘要信息 |
|
点击此处可从《作物学报》下载全文 |
