高温对棉花叶片叶绿素荧光参数的影响研究
毕业论文关键字:高温；棉花；叶绿素荧光参数；光合作用
The research of chlorophyll florescence parameters of cotton leaves under high temperature
Abstract：With global warming, high temperature is one of the main environmental factors affecting the cotton growth and development, a rapid screening method for high temperature resistant varieties of cotton leaves. In order to study the changes of chlorophyll fluorescence parameters in different growth stages of cotton leaves under high temperature stress. This paper is based on 15 cotton varieties and using the plant efficiency analyzer and LI-6400 photosynthesis instrument to determine change rules of leaf chlorophyll fluorescence parameters after different growth stages and different temperature treatments. After high temperature treatment, the result is the chlorophyll fluorescence of Fv/Fo、PHI(Po)、Sum K、Kn、Kp、RC/CSm、TRo/CSm、ETo/CSm、PI(abs) is tended to increased, FM、ABS/RC、DIo/CSm is tended to decreased, No.50 the highest. This peper laid the foundation for screening of high temperature resistance and high efficiency cotton varieties. Having great significance for the selection of high temperature resistant varieties and the high yield of cotton.
Key words: High temperature; Cotton; Chlorophyll fluorescence; Photosynthesis
目 录
摘要3
关键词3
Abstract3
Key words 3
引言4
1 材料与方法4
1.1 试验材料4
1.2 实验方法4
1.2.1 叶绿素荧光参数的测定方法4
1.2.2 花器官性状测定和日最高温统计5
1.2.3 棉花叶片光响应曲线及光合速率测定5
1.2.4 田间产量及考种性状调查5
2 结果与分析5
2.1 日最高温变化规律5
2.2 不同生育期棉花叶片叶绿素荧光参数分析6
2.2.1 最小荧光强度Fo变化 6
2.2.2 最大荧光强度Fm变化 6
2.2.3 潜在光化学活性Fv/Fo变化7
2.2.4 最大光化学效率PHI(Po) 8
2.2.5 总速率常数Sum K变化8
2.2.6 淬灭系数Kn变化 9
2.2.7 光化学反应速率常数Kp变化 10
2.2.8 单位反应中心吸收的光能ABS/RC变化 10
2.2.9 末期单位面积内反应中心数量RC/CSm变化 11
2.2.10 末期单位面积吸收光能ABS/CSm变化 11
2.2.11 末期单位面积捕获光能TRo/CSm变化 12
2.2.12 末期单位面积电子传递量子产额ETo/CSm变化 13
2.2.13 末期单位面积热耗散DIo/CSm变化 14
2.2.14 光能吸收性能指数PI(abs)变化 14
2.3 棉花的光响应曲线与光合速率 15
2.4 高温期棉花花器官的相关特性 15
2.4.1 棉花柱头突出情况 16
2.4.2 棉花花丝长度情况 16
2.4.3 棉花花粉萌发率情况 17
2.5 棉花品种的考种性状和产量性状 17
2.5.1 棉花品种的考种性状 17
2.5.2 棉花品种的产量性状 18
3 讨论 18
3.1 叶绿素荧光参数分析 18
3.2 叶绿素荧光参数与耐高温高光效特性关系 18
3.3结论 18
致谢 19
参考文献 20