PHOTOREGULATION OF BETA-TUBULIN MESSENGER-RNA ABUNDANCE IN ETIOLATED OAT AND BARLEY SEEDLINGS

被引:17
作者
COLBERT, JT [1 ]
COSTIGAN, SA [1 ]
ZHAO, ZF [1 ]
机构
[1] COLORADO STATE UNIV,DEPT BIOL,FT COLLINS,CO 80523
关键词
D O I
10.1104/pp.93.3.1196
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
The effect of light on the abundance of β-tubulin mRNA was measured in etiolated Avena sativa L. and Hordeum vulgare L. seedlings. Slot blot analysis employing an oat β-tubulin cDNA clone was used to measure β-tubulin mRNA levels. White light induced a 45% decrease in oat β-tubulin mRNA abundance by 2 hours after transfer. A saturating red light pulse induced 40 and 55% decreases in β-tubulin mRNA levels in oats and barley, respectively. Recovery of β-tubulin mRNA levels was observed after a red light pulse but not after transfer to continuous white light. The red light induced decrease in oat β-tubulin mRNA abundance was not reversible by a subsequent far-red light treatment. The mesocotyl portion of etiolated oat seedlings exhibited a more dramatic decrease in β-tubulin mRNA abundance in response to red light than did the coleoptile portion. The results indicate that the well-documented effects of red light on the growth of etiolated seedlings are accompanied by changes in the expression of the β-tubulin genes.
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页码:1196 / 1202
页数:7
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