油菜素内酯对湿地松幼苗抗逆性的影响  

EFFECTS OF BRASSINOLIDE (BR) ON THE STRESS RESISTANCE IN PINUS ELLIOTTH ENGELM. SEEDLINGS

作　　者：汪安琳[1] 王永银[1] 

机构地区：[1]南京林业大学林学系

出　　处：《南京林业大学学报（自然科学版）》1993年第3期27-31,共5页Journal of Nanjing Forestry University：Natural Sciences Edition

基　　金：国家自然科学基金资助项目 NO.39170613

摘　　要：在干旱、低温、盐(0.4％NaCl)及酸(H_2SO_4 pH3)的胁迫下,经BR预处理的湿地松幼苗均表现不同程度的抗逆效应。幼苗中叶绿素和可溶性蛋白质含量高于对照、电解质渗漏率及MDA含量则低于对照、SOD活性显著提高。MDA含量与SOD活性呈明显的负相关。Brassinolide (BR) pretreatment significantly promoted the increase of superoxide dismutase (SOD) activity, as well as the chlorophyll and protein contents, the decrease of malondialdehyde (MDA) content and the electrolyte leakage in seedlings of Pinus elliottii Engelm. treated with drought, low temperature (4-5°C, 12°C), salt(0. 4% NaCl), and acid (H2SO pH 3) stress, respectively. There was an obvious inverse correlation between SOD activity and MDA content. The suitable concentration of BR was 0. 5 or 1 ppm. The experimental results showed that BR could enhance the stress resistance of the seedlings.

关 键 词：油菜素内酯 抗逆性 湿地松 幼苗 

分 类 号：S791.246[农业科学—林木遗传育种]