| 4种芒属观赏草对干旱胁迫的生理响应 |
| |
| 引用本文： | 马芳蕾,陈莹,聂晶晶,林思祖.4种芒属观赏草对干旱胁迫的生理响应[J].福建林学院学报,2016(2):180-187. |
| |
| 作者姓名： | 马芳蕾 陈莹 聂晶晶 林思祖 |
| |
| 作者单位： | 1. 福建农林大学园林学院，福建 福州350002; 内蒙古赤峰市林西县规划局，内蒙古 林西025250;2. 福建农林大学园林学院,福建 福州,350002;3. 福建农林大学林学院,福建 福州,350002 |
| |
| 基金项目： | 福建省教育厅科技项目( JB13052)。 |
| |
| 摘 要： | 为研究芒属观赏草的抗旱性，采用聚乙二醇( PEG)模拟不同程度的干旱胁迫(10%、20%、30%)，研究干旱胁迫对1年生芒属4种观赏草生理生化指标的影响。测定其质膜透性，叶绿素a、叶绿素b、可溶性糖、丙二醛( MDA)等的含量、超氧化物歧化酶( SOD)、过氧化氢酶( CAT)、过氧化物酶( POD)、抗坏血酸过氧化物酶( AsA-POD)等4种酶活性共9个生理生化指标，并根据测定值判断4种观赏草的抗旱性强弱。结果表明，干旱胁迫下4种芒属观赏草的相对电导率、可溶性糖含量、 MDA含量升高； AsA-POD活性、叶绿素a、 b含量降低； SOD活性、 CAT活性、 POD活性先升高后降低。对4种观赏草的9个生理生化指标进行方差分析发现，在最高胁迫浓度时，各指标与对照组均存在显著差异( P<0.05)。采用模糊数学隶属函数分析法综合评价，抗旱性强弱顺序为斑叶芒>细叶芒>花叶芒>芒。
|
| 关 键 词： | 聚乙二醇6000 干旱胁迫 生理生化指标 综合评价 |
Physiological response of 4 species of Miscanthus ornamental grass to drought stress |
| |
| Abstract: | To investigate the drought resistance of 4 species of Miscanthus ornamental grass, polyethylene glycol ( PEG) was used to simulate different levels of drought stress ( 10%, 20%, 30%) and make clear the effects of drought stress on the physiological and biochemical indices of 4 species of annual Miscanthus ornamental grass. 9 physiological and biochemical indices such as membrane permeability, chlorophyll a, chlorophyll b, soluble sugar, MDA, SOD, CAT, POD, AsA-POD were measured to assess the drought resistance of 4 species of Miscanthus ornamental grass. With the increase of drought stress, the relative electric conductivities, soluble sugar concentration and MDA increased significantly while AsA-POD, chlorophyll a and chlorophyll b decreased significantly. Activities of SOD, CAT and POD increased and then decreased. According to variance analysis there was significant difference in the indices between the treated groups and the control(P<0.05) at the highest stress concentration. The drought resistance of 4 ornamental grass species of Miscanthus was evaluated preliminarily with subordinate function analysis and the finally order of the drought resistance was as follows:M. sinensis‘Zebrinus’ >M. sinensis‘Gracilimus’ >M. sinensis‘Variegatus’> M. sinensis Anderss.. |
| |
| Keywords: | polyethylene glycol 6000 drought stress physiological and biochemical indices comprehensive assessment |
| 本文献已被 万方数据 等数据库收录！ |
|
