水分胁迫下南洋楹苗期不同种源叶片SOD活性变化研究

杨海燕,陈红跃

投注app;华南农业大学林学院,投注app;华南农业大学林学院

摘要:

对23个南洋楹种源进行不同PEG浓度的水分胁迫处理，包括轻度（10% PEG）、中度（15% PEG）和重度（25% PEG）的三个胁迫水平，测定超氧化物歧化酶(SOD)活性，以期筛选出单一指标下抗旱性较强的种源。结果分析显示，在重度水分胁迫下，抗性强的有y1、p11种源，抗性弱的有y4、n1、n3、s1种源。

关键词: 南洋楹〓种源〓水分胁迫〓SOD活性

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基金项目：国家“948”引进项目“南洋楹优良种质资源及栽培技术引进”的部分内容（编号：98410）。

Analyses of Superoxide Dismutase in Seedlings of Paraserianthes= falcataria under Water Stress

Yang Haiyan and Chen Hongyue

Guangdong Academy of Forestry,Guangzhou;College of Forestry,South China Agricultural University

Abstract:

Superoxide Dismutase (SOD) content of Paraserianthes falcataria seedlings from different provenance regions were respectively measured for outstanding the drought resistance ability of different strains. There are 23 P. falcataria from different provenance regions under water stress with polyethylene glycol concentration in the control, low (10% PEG), moderate (15% PEG) and severe (25% PEG). The results showed that the strains with strong resistance under severe water stress (25% PEG) were y1 and p11. At the same time, the provenance y4, n1, n3 and s1 presented weak resistance.

Key words: Paraserianthes falcataria, provenance, water stress, SOD activity

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