上海农业学报2012，Vol.28Issue(1)：11-16,6.
高温胁迫对不同类型黄瓜幼苗叶绿素荧光特性的影响
Effects of high temperature stress on chlorophyll fluorescence characteristics of different-type cucumber seedlings
摘要
Abstract
Seedlings of 5 different-type cucumber inbred lines under high temperature stress (day 38 ℃/night 28 ℃ and day 42 ℃/night 32 ℃ )were investigated in terms of heat injury index and chlorophyll fluorescence parameters. The results indicated that under high temperature stress,the maximum fluorescence (Fm),maximum photochemical efficiency (Fv/Fm)of photosystem Ⅱ (PS Ⅱ),actual photochemical yield (Yield), photochemical fluorescence quenching coefficient (Qp), actual photochemical efficiency (ΦPSⅡ)of PS Ⅱ,alterable fluorescence drop ratio (Rfd)and partition coefficient (α)of excited energy of PS I were decreased with the temperature rising. The initial fluorescence (Fo),excited energy pressure (1 - Qp)of PS Ⅱ , partition coefficient (β) of excited energy of PS Ⅱ ,and partition imbalance (β/α-1)of excited energy between PS Ⅰ and Ⅱ were increased with the temperature rising. The apparent electron transport rate (ETR)was rapidly increased after 38 ℃ treatment but sharply decreased after 42 ℃ treatment. The correlation analysis showed that the Yield and ETR had a significant negative correlation with the heat injury index and could be used as reliable indexes to determine the heat tolerance of cucumber at seedling stage.关键词
高温胁迫/黄瓜幼苗/叶绿素荧光参数Key words
High temperature stress/Cucumber seedling/Chlorophyll fluorescence parameters分类
农业科技引用本文复制引用
张红梅,金海军,丁小涛,余纪柱..高温胁迫对不同类型黄瓜幼苗叶绿素荧光特性的影响[J].上海农业学报,2012,28(1):11-16,6.基金项目
上海市科技兴农项目(沪农科攻字2009第2-1号)资助 （沪农科攻字2009第2-1号）
