水分胁迫对皇竹草形态及叶片光合特性的影响  

Effects of water stress on morphological and photosynthetic characteristics of Hybrid giant napier (Pennisetum hydridum)

作　　者：郑海[1] 陈小华[1] 黎健龙[1,2] 黎华寿[1] 

机构地区：[1]华南农业大学农业部热带农业环境重点开放实验室,广东广州510642 [2]广东省农科院饮用植物研究所,广东广州510640

出　　处：《广东农业科学》2014年第13期25-28,共4页Guangdong Agricultural Sciences

基　　金：国家重大基础研究项目(2011CB100400-G)子项目;国家自然科学基金(41073059);广东省科技计划项目(B020304008;0203-E12147)

摘　　要：采用盆栽方式模拟田间试验,研究了水分胁迫对皇竹草形态和叶片光合特性的影响。结果表明,在短期(6 d)淹水条件下皇竹草形态没有明显变化,而长期(21 d)淹水导致皇竹草茎长出大量须根、叶片出现失绿;淹水条件下皇竹草叶片的净光合速率、气孔导度、蒸腾速率均低于对照,叶绿素荧光Fv/Fm、Fo、Fm下降明显,叶绿素含量减少;干旱条件下,皇竹草叶片逐渐出现枯黄,且随着干旱程度的加深,叶绿素荧光Fv/Fm、Fo、Fm降低,叶绿素含量减少。A pot experiment was conducted to clarify the effects of water stress on morphological and photosynthetic characteristics of hybrid giant napier （Pennisetum hydridum）. The results showed as follows： there were no obviously changes of Hybrid giant napier under the short-term flooding （6 d）, however stems grew a large number of fibrous roots and leaves lost green under long-term flooded （21d）. The photosynthetic performance, chlorophyll fluorescence Fv/Fm, Fo, Fm and chlorophyll content decreased significantly in the leave of Hybrid giant napier under flooding. Leaves became yellow under drought condition. Chlorophyll fluorescence Fv/Fm, Fo, Fm and chlorophyll content decreased with the drought degree deepen.

关 键 词：皇竹草 水分胁迫 光合特性 

分 类 号：S365[农业科学—作物栽培与耕作技术] S543.9[农业科学—农艺学]