摘要
以"美味"猕猴桃Actinidia deliciosa(A.Chev.)C.F.Liang et A.R.Ferguson实生苗为对照砧木,研究了淹水胁迫对嫁接于"对萼"猕猴桃A.valvata Dunn优良株系扦插苗(耐涝砧木)上的2年生"红阳"猕猴桃叶片叶绿素荧光特性,以阐明猕猴桃耐淹砧木的生理机制。研究结果表明,淹水处理12d后,美味猕猴桃苗叶片的光系统Ⅱ最大光化学效率(Fv/Fm)、有效量子产量(Y(Ⅱ))和光化学猝灭系数(qP)的下降幅度分别比对萼猕猴桃高19.2%、14.9%和10.9%;淹水胁迫后,猕猴桃叶片qN迅速上升,并且在胁迫过程中,一直保持较高的水平,其中美味猕猴桃显著高于对萼猕猴桃。并且对萼猕猴桃的根系活力显著高于美味猕猴桃。上述变化规律表明,在淹水胁迫下对萼猕猴桃苗叶片的光合功能和根系损伤明显比美味猕猴桃小。
The rootstock seedlings of Actinidia deliciosa were used as control to study the effects of waterlogging stress on the leaf chlorophyll florescence characteristics of the 2-year‘Hongyang＇kiwifruit grafted on excellent strains of Actinidia valvata Dunn cuttings（waterlogging tolerant rootstock）to clarify the physiological mechanism of waterlogging tolerant rootstock of kiwifruit.The results showed that the decrease rate of maximal photochemistry efficiency of photosystem II（Fv/Fm）、the effective quantum yield（Y（Ⅱ））and photochemical quenching coefficient（qP）of Actinidia deliciosaleaves were 19.2%,14.9%and 10.9% higher,respectively,than that of the Actinidia valvata Dunn after waterlogging treatment for 12 days.After the waterlogging stress,qN of kiwifruit leaves increased rapidly and maintained at a high level in the process,which Actinidia deliciosa was significantly higher than that of Actinidia valvata Dunn.Besides,the root vigor of Actinidia valvata Dunn was significantly higher than that of Actinidia deliciosa.The results of this study showed that the photosynthetic function of seedling and root damage of Actinidia valvata Dunn were less influenced than that of Actinidia deliciosa under waterlogging stress.
出处
《中国南方果树》
北大核心
2016年第5期29-33,共5页
South China Fruits
基金
浙江省大学生科技创新活动计划暨新苗人才计划项目(2015R412001)资助
关键词
猕猴桃
砧木
淹水
叶绿素荧光
耐涝性
kiwifruit
rootstock
water-flooding
chlorophyll fluorescence
tolerance
