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作 者 ：赵可夫,冯立田,张圣强,宋杰

期 刊 ：生态学报 2000年 20卷 5期 页码：795~799

关键词：芦苇；生态型；光合气体交换；气孔限制；Ru；BPCasc和PE；PCasc活性；Fv/Fm；

Keywords:Phragmites communis, ecotype, photosynthetic gas exchange, stomatal limitation, activities of RuBPCase and PEPCase, Fv/Fm,

摘 要 ：黄河三角洲不同生态型芦苇光合速率和气孔导度有明显差异 ,随生境盐度的增加而降低 ,气孔限制因素是盐胁迫下芦苇光合降低的原因之一。低盐度生境中生长的芦苇的 Rn BPCase活性均大于高盐度下的 ,而 PEPCase活性均小于高盐度下的 ,表明在盐渍条件下 ,叶肉光合器官光合活性的降低也限制芦苇的光合速率。随盐度升高 ,Ru BPCase与PEPCasc活性之比降低。高 PFD下 ,盐胁迫加剧 Fv/Fm降低程度。此外 ,在高盐度下由于叶片蒸腾下降而导致的叶温较高也可能与光合活性降低有关。

Abstract:Among the different ecotypes of Phragmites communis in the Yellow River Delta,the photosynthetic rate and the stomatal conductance were significantly different.They decreased with the increase of salinity level in the habitat,so the stomatal limitation is one of the main causes decreasing the photosynthetic rate of P.communis. With the increase of salinity level in the habitats,the RuBPCase activity decreased,and PEPCase activity increased.It indicated that,under salt stress,the decrease of the photo...

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