Record Details

Heat tolerance mechanisms in cattle—status in zebu cattle: A review

Indian Agricultural Research Journals

View Archive Info
 
 
Field Value
 
Title Heat tolerance mechanisms in cattle—status in zebu cattle: A review
 
Creator BEHL, RAHUL
BEHL, JYOTSNA
JOSHI, B K
 
Subject Cattle; Cutaneous heat loss; Cellular heat shock response; Heat tolerance
 
Description Bos taurus cattle breeds that have evolved in temperate environments fail to fully adapt to extreme heat conditions. The better adaptation to these environments by Bos indicus cattle is primarily related to the greater sweating rates due to higher density and larger perimeter of sweat glands, quick transfer of metabolic heat to the skin due to a less tissue resistance and less hair coat resistance to heat loss. These characteristics permit these cattle to maintain body temperature more efficiently than Bos taurus breeds. At increased core body temperatures, there is increase in glucose and amino acid oxidation, decrease in fatty acid metabolism, alteration in endocrine system and activation of the stress response genes to environmental heat loads. The cellular heat shock response is another component of adaptation to heat stress. Heat stress activates heat shock transcription factor-1 (HSF1) leading to increased expression of heat shock proteins (HSP) coupled with decreased expression and synthesis of other proteins, and HSP induced activation of immune system. The central role that HSF1 has in coordinating thermal tolerance suggests that there is opportunity to improve thermal tolerance via gene manipulation. Determining the basis of heat tolerance, especially the Bos indicus including Indian zebu cattle breeds will lead to opportunities for optimum utilization via altered breeding and management of these magnificent genetic resources.
 
Publisher Directorate of Knowledge Management in Agriculture
 
Contributor ICAR
 
Date 2010-09-09
 
Type info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Review Article
 
Format application/pdf
 
Identifier http://epubs.icar.org.in/ejournal/index.php/IJAnS/article/view/893
 
Source The Indian Journal of Animal Sciences; Vol 80, No 9 (2010)
0367-8318
 
Language eng
 
Relation http://epubs.icar.org.in/ejournal/index.php/IJAnS/article/view/893/363
 
Rights Copyright (c) 2014 The Indian Journal of Animal Sciences