Table of Contents
Journal of Botany
Volume 2012, Article ID 803413, 6 pages
http://dx.doi.org/10.1155/2012/803413
Review Article

Adaptation to High Temperature and Water Deficit in the Common Bean (Phaseolus vulgaris L.) during the Reproductive Period

1Tropical Agriculture Research Front, Japan International Research Center for Agricultural Sciences (JIRCAS), 1091-1, Maezato, Ishigaki, Okinawa 907-0002, Japan
2Department of Agronomy, CCS Haryana Agricultural University, Hisar 125004, India

Received 6 February 2012; Revised 23 March 2012; Accepted 29 March 2012

Academic Editor: William K. Smith

Copyright © 2012 Hide Omae et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This paper reviews the adaption to heat and drought stresses in Phaseolus vulgaris, a grain and vegetable crop widely grown in both the Old and New World. Substantial genotypic differences are found in morphophysiological characteristics such as phenology, partitioning, plant-water relations, photosynthetic parameters, and shoot growth, which are related to reproductive responses. The associations between (a) days to podding and leaf water content and (b) the number of pods per plant and seed yield are consistent across different environments and experiments. Leaf water content is maintained by reductions in leaf water potential and shoot extension in response to heat and drought stress. Heat-tolerant cultivars have higher biomass allocation to pods and higher pod set in branches. These traits can be used as a marker to screen germplasm for heat and drought tolerance. In this paper, we briefly review the results of our studies carried out on heat and drought tolerance in the common bean at the Tropical Agriculture Research Front, Ishigaki, Japan.