NITRATE UPTAKE IN COMMON BUCKWHEAT (FAGOPYRUM-ESCULENTUM MOENCH) - KINETICS

被引：2
|
作者：
PAULSAMY, S [1 ]
CHRUNGOO, NK [1 ]
机构：
[1] NE HILL UNIV, DEPT BOT, SHILLONG 793014, INDIA
来源：
ENVIRONMENTAL AND EXPERIMENTAL BOTANY | 1994年 / 34卷 / 02期
关键词：
BUCKWHEAT; FAGOPYRUM-ESCULENTUM; KINETICS; NITRATE UPTAKE;
D O I：
10.1016/0098-8472(94)90040-X
中图分类号：
Q94 [植物学];
学科分类号：
071001 ;
摘要：
The uptake of nitrate by seedlings of common buckwheat (Fagopyrum esculentum) increased gradually with time (t) and with increasing medium nitrate concentration (c) UP to t60 minutes and c1 mM, respectively. Glucose had a stimulatory effect on nitrate uptake. 3(3,4-Dichlorophenyl 1,1-dimethylurea) (DCMU) markedly suppressed the uptake of nitrate by buckwheat seedlings. NH4+ and ClO3- ions also suppressed nitrate uptake. While the inhibition due to NH4+ was non-competitive in nature, the inhibition due to ClO3- ions was competitive. Uptake of nitrate was also markedly affected by pH of the nutrient medium, with the optimum uptake at near neutral pH.
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页码：207 / 212
页数：6
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