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The non-gibberellic acid-responsive semi-dwarfing gene uzu affects Fusarium crown rot resistance in barley


Chen, G and Yan, W and Liu, Y and Wei, Y and Zhou, M and Zheng, Y-L and Manners, JM and Liu, C, The non-gibberellic acid-responsive semi-dwarfing gene uzu affects Fusarium crown rot resistance in barley, BMC Plant Biology, 14, (1) Article 22. ISSN 1471-2229 (2014) [Refereed Article]


Copyright Statement

Copyright 2014 the Authors: This is an Open Access article distributed under the terms of the Creative Commons Attribution License (

DOI: doi:10.1186/1471-2229-14-22


Background: Studies in Arabidopsis show that DELLA genes may differentially affect responses to biotrophic and necrophic pathogens. A recent report based on the study of DELLA-producing reduced height (Rht) genes in wheat and barley also hypothesized that DELLA genes likely increased susceptibility to necrotrophs but increased resistance to biotrophs.

Results: Effects of uzu, a non-GA (gibberellic acid)-responsive semi-dwarfing gene, on Fusarium crown rot (FCR) resistance in barley were investigated. Fifteen pairs of near isogenic lines for this gene were generated and assessed under two different temperature regimes. Similar to its impacts on plant height, the semi-dwarfing gene uzu also showed larger effects on FCR severity in the high temperature regime when compared with that in the low temperature regime.

Conclusions: Results from this study add to the growing evidence showing that the effects of plant height on Fusarium resistances are unlikely related to DELLA genes but due to direct or indirect effects of height difference per se. The interaction between these two characteristics highlights the importance of understanding relationships between resistance and other traits of agronomic importance as the value of a resistance gene could be compromised if it dramatically affects plant development and morphology.

Item Details

Item Type:Refereed Article
Keywords:plant height, Fusarium crown rot, uzu gene, near isogenic lines, DELLA proteins
Research Division:Agricultural, Veterinary and Food Sciences
Research Group:Crop and pasture production
Research Field:Crop and pasture biochemistry and physiology
Objective Division:Plant Production and Plant Primary Products
Objective Group:Grains and seeds
Objective Field:Barley
UTAS Author:Zhou, M (Professor Meixue Zhou)
ID Code:88372
Year Published:2014
Web of Science® Times Cited:24
Deposited By:Tasmanian Institute of Agriculture
Deposited On:2014-01-31
Last Modified:2017-11-06
Downloads:272 View Download Statistics

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