Role of cytokinins in the regulation of stomatal conductance of wheat seedlings under conditions of rapidly changing local temperature

被引：20
|
作者：
Veselova, S. V. [1 ]
Farkhutdinov, R. G. [1 ]
Veselov, D. S. [1 ]
Kudoyarova, G. R. [1 ]
机构：
[1] Russian Acad Sci, Ufa Sci Ctr, Inst Biol, Ufa 450054, Bashkortostan, Russia
来源：
RUSSIAN JOURNAL OF PLANT PHYSIOLOGY | 2006年 / 53卷 / 06期
关键词：
Triticum durum; stomatal conductance; cytokinins; local stress; hormonal signal;
D O I：
10.1134/S1021443706060057
中图分类号：
Q94 [植物学];
学科分类号：
071001 ;
摘要：
The influence of an air temperature increase by 4 degrees C and nutrient solution cooling down to 5 VC on stomatal conductance and hormone level of seven-day-old wheat (Triticum durum L., cv. Bezenchukskaya 139) seedlings was studied. An elevated air temperature resulted in a rapid rise of stomatal conductance preceded by the increase in the level of cytokinins in leaves. Cooling of the nutrient solution induced gradual stomatal closure along with a decreasing cytokinin level in leaves. Hormone concentration in the xylem sap of wheat seedlings was determined, and the rate of hormone transport from the roots to shoots was calculated. The role of cytokinins in the regulation of stomatal conductance under conditions of local thermal treatments is discussed.
引用
收藏
页码：756 / 761
页数：6
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