GrainGenes Reference Report: PGR-42-125
Reference
PGR-42-125
Title
Relationship between gibberellins, height, and stress tolerance in barley (Hordeum vulgare L.) seedlings
Journal
Plant Growth Regulation
Year
2004
Volume
42
Pages
125-135
Author
[ Hide all but 1 of 6 ] Sarkar S Perras MR Falk DE Zhang RC Pharis RP Fletcher RA
Abstract
Summary: The relationship between gibberellin (GA) levels, height, and stress tolerance was investigated using barley (Hordeum vulgare L.) seedlings, which were exposed to heat stress (50(degree)C for 3 h) and a free radical generator (Paraquat). Barley cv. Perth seedlings were treated with GA-inhibitors, either a triazole or one of two acylcyclohexanediones. They were tested along with four mutants that were either responsive (MC96 and dwf1) or non-responsive (MC90 and Dwf2) to applied growth-active GAs. Analyses of seedlings, whether mutants, or treated with GA-inhibitors, gave a negative correlation between height and tolerance. We also observed that the shorter seedlings with the least amount of growth active GAs were the most tolerant to stress. The overall results of this study suggest that reduced GA levels or sensitivity to GA, with a concomitant reduction in height are important for induction of stress tolerance
Keyword
barley
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GrainGenes is a product of the Agricultural Research Service of the US Department of Agriculture.
GrainGenes Reference Report: PGR-42-125
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GrainGenes is a product of the Agricultural Research Service of the US Department of Agriculture. | |||