ISOFORMS OF GLUTAMINE-SYNTHETASE IN COTYLEDONS, LEAVES AND ROOTS OF SUNFLOWER PLANTS

被引：11

作者：

CABELLO, P

DELAHABA, P

MALDONADO, JM

机构：

[1] Departamento de Biología Vegetal y Ecología, División de Fisiología Vegetal, Facultad de Ciencias, Universidad de Córdoba, Córdoba

来源：

JOURNAL OF PLANT PHYSIOLOGY | 1991年 / 137卷 / 03期

关键词：

HELIANTHUS-ANNUS; GLUTAMINE SYNTHETASE; ION-EXCHANGE CHROMATOGRAPHY; ISOFORMS;

D O I：

10.1016/S0176-1617(11)80149-5

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

Isoforms of glutamine synthetase (GS) have been isolated from different tissues of sunflower plants by ion-exchange chromatography. Two forms (GS1 and GS2) of GS were identified in leaves and only one form (GS(r)) was identified in roots. The relative proportions of GS1 and GS2 in leaves were 5% and 95% of the total GS activity, respectively. Green cotyledons also contained both GS1 (21%) and GS2 (79%). In etiolated cotyledons, the activity level of the GS2 isoform greatly decreased while GS1 activity slightly increased.

引用

页码：378 / 380

页数：3

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