水分胁迫对甘薯叶绿素荧光和光合特性的影响  

Effects of Water Stress on Chlorophyll Fluorescence and Photosynthesis Characteristics in Sweet Potato(Ipomoea Batatas Lam.)

作　　者：张云华[1] 王荣富[1] 阮龙[2] 

机构地区：[1]安徽农业大学生命科学学院,合肥230036 [2]安徽农业科学院,合肥230031

出　　处：《中国农学通报》2005年第8期208-210,共3页Chinese Agricultural Science Bulletin

基　　金：安徽省自然科学基金项目"水稻光抑制和强光适应机制"(01041106);校长青年基金"水分胁迫条件下不同甘薯品种的光合特性的研究"(0400112)资助

摘　　要：以甘薯品种皖84-559,徐州18,为材料,测定功能叶片的光合和叶绿素荧光参数的变化。水分胁迫下,徐州18叶绿素含量、光合速率、PSⅡ原初光化学效率(Fv/Fm)和光化学猝灭系数(qP)的下降较少;非光化学猝灭系数(qN)增加较少。表明徐州18在水分胁迫条件下,光合机构受破坏较轻,其吸收的光能能较多的用于光化学转化能力,通过热耗散的能量较少。Using sweet potato cuhivars Xuezhoul8 and Wan84-559 as materials changes of photosynthesis and chlorophyll fluorescence parameters were measured. Under water stress, The decrement of contents of chlorophyll , PS I1 primary photochemical efficiency （Fv/Fm）and photochemical quenching coefficient （qP） were less; increment of non-photochemical quenching coefficient （qN）were less in Xuezhoul8. The above results suggested that damage of photosynthetic apparatus were lighter; more light energy absorbed by Xuezhou18 was converted into chemical energy and less light energy was dissipated through thermal energy.

关 键 词：甘薯 叶绿素荧光 光合特性 水分胁迫 原初光化学效率 光化学猝灭系数 

分 类 号：S531[农业科学—作物学]