广西植物2012，Vol.32Issue(5)：679-685,7.DOI:10.3969/j.issn.1000-3142.2012.05.021
低温胁迫下不同甘蔗品种(系)光合特性的变化及其与耐寒性的关系
Correlation between changes of photosynthetic characteristics of different sugarcane varieties and their cold tolerance under low temperature
摘要
Abstract
In order to explore the correlations between changes of photosynthetic characteristics and cold tolerance in different sugarcane varieties,7 newly bred sugarcane lines and 2 main cultivars from Sugarcane Research Institute, Guangxi Academy of Agricultural Sciences were employed to examine the changes of chilling injury index,chlorophyll content and photosynthetic perameters under low temperature stress at seedling stage. The chilling injury index was continually increased with the prolonging of low temperature treatment, but different sugarcane varieties showed dif-ferent changes. The chlorophyll content in all the sugarcane varieties were continually decreased with the prolonging of low temperature treatment. There were significant differences in net photosynthetic rate and stomatal con-ductance between room temperature treatment and low-temperature treatment. The Fv/Fm,ΦPPSⅡ , Fv'/ Fm', qP and ETR were decreased obviously, but Fo, Fs and qNP were increased after the low temperature treatment. There were significant correlations between chlorophyll content, various photosynthetic perameters and chilling injury indexes,and the correlation coefficients between Fv/Fm,Fv'/Fm ,ΦPPSⅡ and chilling inju-ry indexes were higher than 0. 800, which suggested that Fv/Fm,Fv'/Fm' ,ΦPPSⅡ could be used as the indexes of cold tolerance identification in sugarcane.关键词
甘蔗/品种/抗寒性/叶绿素荧光/低温胁迫Key words
sugarcane/variety/cold tolerance/chlorophyll fluorescence/low temperature stress分类
农业科技引用本文复制引用
唐仕云,杨丽涛,李杨瑞..低温胁迫下不同甘蔗品种(系)光合特性的变化及其与耐寒性的关系[J].广西植物,2012,32(5):679-685,7.基金项目
国家科技支撑计划项目(2008BADB8B00) （2008BADB8B00）
广西甘蔗研究所基本科研业务专项(G2009012) （G2009012）
科技部国际合作项目(2008DFA30600,2009DFA30820) （2008DFA30600,2009DFA30820）
农业部"948"项目(2009-Z8(2)) （2009-Z8(2）
广西科学研究与技术开发计划项目(桂科产1123008-1) （桂科产1123008-1）
广西自然科学基金(2011GXNSFF018002) （2011GXNSFF018002）
