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Alleviating Heat Stress in Spring Canola (Brassica napus L.) with Foliar Boron Treatment

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Title: Alleviating Heat Stress in Spring Canola (Brassica napus L.) with Foliar Boron Treatment
Author: Ramsahoi, Laxhman
Department: Department of Plant Agriculture
Program: Plant Agriculture
Advisor: Earl, Hugh
Abstract: This thesis is an investigation of the effects of foliar boron (B) application on alleviating heat stress in spring canola (Brassica napus L.). Canola is a cool season crop and as such it is sensitive to high temperature stress during flowering. Heat stress during this period results in yield loss due to pod abortions. Field and controlled environment experiments were conducted to investigate the benefits of foliar B applications and to determine if B application could alleviate the effects of heat stress. Field results indicated that benefits of B application are inconsistent, but may be more likely when the growing season is very warm and dry. In controlled environment experiments, plants were exposed to three temperature regimes at three development stages for three durations. Based on this a heat stress protocol that produced a 25% reduction in viable pod numbers was selected to be used for testing B effects. Using this protocol, B application was shown to significantly reduce pod abortions when compared with the treatments without B. B application reduced pod abortion in the presence of heat stress.
Description: Foliar Boron application to Spring Canola during early flower enhances yield by alleviating the effects of heat stress.
Date: 2013-10
Rights: Attribution-NoDerivs 2.5 Canada
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Attribution-NoDerivs 2.5 Canada Except where otherwise noted, this item's license is described as Attribution-NoDerivs 2.5 Canada