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United States Department of Agriculture

Agricultural Research Service

Research Project: DEVELOP MANAGEMENT TOOLS FOR EARLY STRESS DETECTION AND EFFICIENT AGROCHEMICAL UTILIZATION FOR PROTECTED HORTICULTURE CROPS

Location: Application Technology Research Unit

Title: Effect of acute heat stress on plant nutrient metabolism proteins

Authors
item Giri, Anju -
item Mishra, Sasmita -
item Heckathorn, Scott -
item Frantz, Jonathan -
item Krause, Charles

Submitted to: Symposium Proceedings
Publication Type: Proceedings
Publication Acceptance Date: April 18, 2013
Publication Date: April 20, 2013
Citation: Giri, A., Mishra, S., Heckathorn, S., Frantz, J., Krause, C.R. 2013. Effect of acute heat stress on plant nutrient metabolism proteins. Symposium Proceedings. 4th Annual University of Toledo Graduate Student Association Midwest Graduate Research Symposium, April 20, 2013, University of Toledo, Toledo, Ohio.

Technical Abstract: Abrupt heating decreased the levels (per unit total root protein) of all but one of the nutrient metabolism proteins examined, and for most of the proteins, effects were greater for severe vs. moderate heat stress. For many of the nutrient metabolism proteins, initial effects of heat (1 d) were reversed by day 6 of heating or within 7 d of post-heat recovery, indicating acclimation during the heat treatment or rapid recovery from it. Root growth, respiration, and %N were decreased by heat, especially severe vs. moderate heat, and recovery of root growth and respiration was incomplete even after 7 d for the severe heat treatment. Hence, roots are very sensitive to damage from high temperatures. Because heat stress decreases root growth, %N (and thus total protein per g root), respiration (and thus ATP production), as well as decreasing levels of many nutrient metabolism proteins , heat stress will have a pronounced overall negative impact on total plant nutrient uptake and assimilation capacity for many nutrients. These results indicate that increases in heat waves with global climate change will negatively impact plant, including crop, nutrient relations.

Last Modified: 7/28/2014
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