THE ROLE OF POTASSIUM FERTILIZER IN NODULATION AND NITROGEN-FIXATION OF FABA BEAN (VICIA-FABA L) PLANTS UNDER DROUGHT STRESS

被引：28

作者：

WAHAB, AMA ^{[1
]}

ABDALLA, MH ^{[1
]}

机构：

[1] ASSIUT UNIV,FAC SCI,DEPT BOT,ASSIUT 71516,EGYPT

来源：

BIOLOGY AND FERTILITY OF SOILS | 1995年 / 20卷 / 02期

关键词：

FABA BEAN; WATER STRESS; NODULATION; NITROGEN FIXATION; LEGHEMOGLOBIN; INVERTASE; PROTEASE; K FERTILIZER;

D O I：

10.1007/BF00336594

中图分类号：

S15 [土壤学];

学科分类号：

0903 ; 090301 ;

摘要：

Three-week-old nodulated faba bean plants were subjected to different levels of drought stress (one-half, one-quarter, or one-eighth field capacity) for 5 weeks. Half the stressed plants were treated with KCI at 10 mg kg(-1) soil or 150 mg kg(-1) soil at the beginning of the drought stress. Nodulation and nitrogenase activity were significantly decreased by increasing drought stress. Leghaemoglobin and protein contents of nodule cytosol were also severely inhibited by drought stress. This decline was attributed to the induction of protease activity. However, carbohydrate contents of the nodule cytosol increased significantly. This accumulation was attributed to a sharp decline in invertase activity and low use of sugar by the bacteroids. We conclude that harmful effects of water deficits can be alleviated by increasing K+ supplementation.

引用

页码：147 / 150

页数：4

共 21 条

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