Changes in the isoform pattern and subunit composition of GS-1 in sugar beet leaves dependent on leaf age

被引：3

作者：

Brechlin, P

Mäck, G

Burba, M

Tischner, R

机构：

[1] Univ Gottingen, Albrecht V Haller Inst Pflanzenwissensch, D-37073 Gottingen, Germany

[2] Kleinwanzlebener Saatzucht, Einbeck, Germany

来源：

JOURNAL OF PLANT PHYSIOLOGY | 1999年 / 155卷 / 4-5期

关键词：

Beta vulgaris L; glutamine synthetase; senescence; subunit composition;

D O I：

10.1016/S0176-1617(99)80044-3

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

This investigation reports on changes in the subunit composition of glutamine synthetase 1 (GS-1, E.C. 6.3.1.2) in sugar beet (Beta vulgaris L.) leaves dependent on leaf age. The highest GS-1 activity was found in young and in senescing leaves of sugarbeet. Dependent on the ontogeny of the leaves, the isoform pattern of GS-1 and the subunit composition were changed. In young leaves GS-1 was found to be a hetero-octamer, while in senescent leaves this enzyme was functional as a homo-octamer. This different subunit composition of GS-1 is discussed with respect to changes in the physiological role of leaves from sink to source.

引用

页码：497 / 502

页数：6

共 23 条

[1] A role for cytosolic glutamine synthetase in the remobilization of leaf nitrogen during water stress in tomato [J].