田间冬小麦叶片光合午休过程中的非气孔限制

被引：30

作者：

郑国生

王焘

机构：

[1] 山东农业大学生命科学学院,山东农业大学生命科学学院泰安,泰安

来源：

应用生态学报 | 2001年 / 05期

关键词：

Field winter wheat; Midday depression of photosy nthesis; Nonstomatic limitations;

D O I：

10.13287/j.1001-9332.2001.0190

中图分类号：

S512.11 [];

学科分类号：

0901 ;

摘要：

Diurnal changes in leave photosynthesis at the late development stage o f winter wheat were examined.The results indicated that the photosynthetic rate was parallelly changed with,but not totally dependent on the variation of st omatic conductance.At 10∶00 am, the photosynthetic rate reached its highest le ve l,then gradually decreased along with the stomatic conductance.Before 12∶00 am, the decrease in photosynthetic rate was mainly caused by stomatic limitation s.Following it,stomatic limitations (Ls) were decreased,and the intercellu ler CO 2 concentration (Ci) was increased.Inhibition of photosynthesis,in cluding the decrease of leaf photosynthetic capacity (J max ) and Rubisco ca rboxy lic activity and efficiency (A/Ci) was mainly resulted from nonstomatic limitations,not stomatic limitations.

引用

页码：799 / 800

页数：2

共 4 条

[1] 冬小麦对有限水分高效利用的生理机制 [J].