摘要
以美国红树莓为试材 ,对其光合特性进行了研究。结果表明 :树莓叶片光合速率日变化呈双峰曲线 ,有明显的“午休”现象 ;光合速率与气孔导度呈显著的正相关 ,但光合速率变化与气孔导度和胞间CO2 浓度的变化并不完全同步 ;光合速率季节性变化也呈双峰曲线变化 ;影响光合作用的主导环境因子为光照强度和湿度 ;光合作用的饱和点和补偿点分别为 75 0 μmol·m-2 ·s-1和 2 1 4 μmol·m-2 ·s-1。
Photosynthetic characteristics were carried out with Rubus strigosus Mick.The results indicated:the curve of diurnal variation of Rubus strigosus Mick.leaf photosynthesis showed two peaks, appeared'Wuxiu'phenomenon. Pn was positively significantly correlated with Gs,at the same time, the variation of Pn,Gs and Ci was synchronism;the principal environmental factors,which effected Pn,were PFD and RH; the curve of seasonal variation had two peaks; The light compensation point of photosynthesis and light saturation point of Rubus strigosus Mick.leaves were 750 μmol·m -2·s -1 and 21·4 μmol·m -2·s -1,respectively.
出处
《园艺学报》
CAS
CSCD
北大核心
2003年第3期314-316,共3页
Acta Horticulturae Sinica
关键词
树莓
光合特性
气孔导度
细胞间隙
CO2浓度
Rubus strigosus Mick.
Photosynthesis
Stomata conductance
Intercellular CO 2 concentration
