生态环境学报2009，Vol.18Issue(5)：1872-1876,5.
茉莉酸甲酯(MeJA)对干旱胁迫下水稻幼苗光合作用特性的影响
Effects of methyl jasmonate (MeJA) on photosynthetic traits of rice seedlings under drought stress
摘要
Abstract
Jasmonic acid (JA) and its its methyl ester, methyl jasmonate (MeJA), are known to be important growth regulators which naturally occur in higher plants. They are also involved in incrcased plant resistance to different environmental stress, including abiotic stress such as mechanically damage, low temperature, drought, salinity etc., and biotic stress such as pathogen and insect damage. Seedlings of rice variety Zhong-Er-Ou-6 were exposed to four treatments including well-watered, drought, drought plus MeJA, drought plus MeJA and inhibitor of jasmonic acid signal pathways (SHAM) to determine effects of MeJA application on chlorophyll content, chlorophyll fluorescence and photosynthetic traits of rice seedling leaves. The results showed that MeJA application significantly increased leaf water potential, chlorophyll content, chlorophyll fluorescence parameter F_v/F_0 and F_v/F_m, transpi-ration rate, stomata conductance and CO_2 concentration in cell interval under drought conditions, while it reduced ABA content in rice leaves. SHAM application under drought plus MeJA effectively inhibited these effects and led to decreases in leaf water poten-tial, chlorophyll content, chlorophyll fluorescence parameter Fv/F0 and Fv/Fm and photosynthetic parameters, as well as increase in ABA content.关键词
茉莉酸甲酯(MeJA)/水稻/干旱/水杨苷异羟肟酸(SHAM)Key words
MeJA/ rice/ drought/ SHAM分类
农业科技引用本文复制引用
董桃杏,蔡昆争,曾任森..茉莉酸甲酯(MeJA)对干旱胁迫下水稻幼苗光合作用特性的影响[J].生态环境学报,2009,18(5):1872-1876,5.基金项目
教育部博士点基金资助项目(2000065402) （2000065402）
