ISSN:
1573-5036
Keywords:
ammonium
;
calcium
;
CO2 exchange rate
;
GS/GOGAT
;
rice rubisco
Source:
Springer Online Journal Archives 1860-2000
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
Notes:
Abstract 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).
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00010662
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