摘要
以1年生盆栽美味猕猴桃‘秦美’和中华猕猴桃‘红阳’实生苗为试材,研究了淹水胁迫对不同抗性猕猴桃幼苗光合特性的影响。结果表明:持续淹水14d内随着淹水时间的延长,叶片净光合速率、蒸腾速率、气孔导度显著下降,而胞间CO2浓度显著上升;中华猕猴桃对淹水较敏感,淹水时叶片净光合速率受到的影响大于美味猕猴桃,而美味猕猴桃合成同化物能力强于中华猕猴桃;美味猕猴桃叶片气孔导度日变化规律呈明显的双峰曲线变化,但峰值均低于对照值;中华猕猴桃经淹水后,叶片气孔导度日变化趋势呈单峰曲线变化,峰值时较对照降低60.95%;2个猕猴桃品种蒸腾速率日变化呈先升后降的趋势,且均低于对照。
Taking one-year-old potted Actinidia deliciosa ＇Qinmei＇ and ＇ Hongyang＇ kiwifruit seedlings as test materials, effect of waterlogging stress on photosynthetic characteristics of different resistance of kiwifruit seedlings were studied. The results showed that,with the continuous flooding 14 days with the extension of waterlogging time,net photosynthetic rate, transpiration rate and stomatal conductance decreased, while intercellular CO2 concentration significantly increased. A. chinensis was sensitive to waterlogging stress,and the leaf net photosynthetic decreased rate was greater than that of A. deliciosa. While the synthesis and assimilation ability of A. deliciosa was stronger than that of A. chinensis. A. deliciosa leaf stomatal conductance regulation showed double-peak curve changes obviously,but the peak value was lower than the control values. A. chinensis leaf stomatal conductance trends showed a single peak curve,the peak was decreased 60. 95%. Diurnal changes of transpiration rate of two kiwifruit increased first and then decreased, and was lower than that of control.
出处
《北方园艺》
CAS
北大核心
2015年第2期14-17,共4页
Northern Horticulture
基金
河南科技大学博士科研基金资助项目(09001473)
关键词
猕猴桃
幼苗
淹水胁迫
日光合特性
kiwifruit
seedlings
waterlogging stress
photosynthetic characteristics
