GROWTH-RESPONSES OF RICE IN AMMONIUM-BASED NUTRIENT SOLUTION WITH VARIABLE CALCIUM SUPPLY

被引：22

作者：

SUNG, FJM

LO, WS

机构：

[1] Department of Agronomy National Chung Hsing University Taichung

来源：

PLANT AND SOIL | 1990年 / 125卷 / 02期

关键词：

ammonium; calcium; CO[!sub]2[!/sub] exchange rate; GS/GOGAT; rice rubisco;

D O I：

10.1007/BF00010662

中图分类号：

S3 [农学（农艺学）];

学科分类号：

0901 ;

摘要：

It is commonly known that calcium promotes NO3- uptake in many crop species. However, calcium enhancement of NH4+ uptake by plants has received little attention. This study aimed to evaluate the effect of Ca supplements on NH4+ uptake and plant growth in solution cultured rice. Supplemental Ca applied at vegetative and reproductive phases of plant ontogeny tended to stimulate NH4+ absorption, and accordingly resulted in a better straw and grain yield. However, excessively supplied Ca (400 ppm) was detrimental to plant growth. Increases in straw and grain yield observed at Ca levels up to 300 ppm were linked to the Ca-enhanced activities of glutamine synthetase (GS), glutamate synthase (GOGAT), and ribulose 1, 5-bisphosphate carboxylase/oxygenase (Rubisco). © 1990 Kluwer Academic Publishers.

引用

页码：239 / 244

页数：6

共 24 条

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[2]

BRAVDO B, 1982, PHOTOSYNTHETICA, V16, P36

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