摘要
大麦在拔节孕穗期受渍后,根系伤流强度下降,伤流液中氨基酸含量减少;同时,地上部叶绿素降解,气孔开度减小,光合速率下降,植株生长发育受阻,最终导致产量下降。渍水后光合速率下降主要与气孔开度减小和叶绿素不断降解有关。不同耐渍性品种受渍后表现出明显不同的生理响应,其中以气孔开度最为敏感,表明其有可能作为大麦耐渍性品种筛选的指标用之于育种实践。
After barley was subjected to waterlogging at elongation and booting stage,its bleeding inten- sity and the capacity of amino acids of bleeding sap were decreased,the chlorophyll was broken down the stomatal aperture reduced,and the net photosynthetic rate was decreased.Finally the growth and deve- lopment of plant were retarded,as a result,the output was reduced severely.The decrease in photosythesis after waterlogging was mainly related to the decrease in the stomatal aperture and the chlorophyll content.Barley varieties with different capability of waterlogging tolerance showed various physiologocal responses after.waterloggng,in which stomatal aperture was most sensitive.The results reveal a possibility that stomatal aperture minght serve as an index for screening waterlogging tolerance in barley breeding.
出处
《浙江农业学报》
CSCD
1990年第1期18-22,共5页
Acta Agriculturae Zhejiangensis
关键词
大麦
品种
渍害
孕穗期
生理
Hordeum vulgare
Waterlogging
Stomatal aperture
Photosynthesis
Bleeding sap
