水土保持学报2012，Vol.26Issue(6)：268-273,6.
外源水杨酸对铝胁迫下栝楼光合特性及耐铝性的影响
Effect of Exogenous SA on Photosynthesis and Al Tolerance of Trichosanthes kirilowii Maxim Under Aluminum Stress
摘要
Abstract
A solution culture experiment was conducted to study the effects of different SA concentration on growth characteristics,photosynthesis,oxidation resistance,UV-B absorbing compounds and MDA content of two Trichosanthes kirilowii cultivars,Anguo(Al-tolerant genotype) and Pujiang(Al-sensitive genotype),under 800 μmol/L aluminum stress.The results showed that 800 μmol/L Al treated for 15 days,the relative root length,plant height and fresh shoot weight,chlorophyll content,the maximum energy conversion efficiency(Fv/Fm),maximum fluorescence yield(Fm) and electron transport rate(ETR) were significantly lower of the two T.kirilowii cultivars.SOD,CAT activity changed in the opposite trend,indicating the differences of the two T.kirilowii cultivars in aluminum tolerance,POD activity and UV-B absorbing compounds decreased,MDA content and initial fluorescence(F0) increased.Adding 10,30,50 μmol/L exogenous SA could reduce aluminum accumulation in the apical cell wall,MDA content and initial fluorescence(F0),also increased the relative root length,plant height,fresh shoot weight,chlorophyll content,chlorophyll fluorescence of the relevant indicators and antioxidant enzyme activity to a certain extent.By increasing antioxidant enzyme activities and photosynthesis-related indicators,SA enhanced the ability of T.kirilowii to resistance to aluminum toxicity.Comprehensive analyzing evaluation by the method of subjection function,the results showed that the external source of SA could alleviate aluminum toxicity to some extent,but it did not eliminate the inhibition of T.kirilowii growth caused by aluminum.关键词
栝楼/铝胁迫/光合特性/抗氧化酶Key words
Trichosanthes kirilowii Maxim/aluminum stress/photosynthesis/antioxidant enzyme分类
农业科技引用本文复制引用
高培培,章艺,吴玉环,徐根娣,郑人卫,罗虹,陈果果,周桑桑,刘鹏..外源水杨酸对铝胁迫下栝楼光合特性及耐铝性的影响[J].水土保持学报,2012,26(6):268-273,6.基金项目
国家自然科学基金项目 （）
浙江省自然科学基金项目 （）
浙江省公益技术研究农业项目 （）
