TY  - JOUR
AV  - public
A1  - Kannangara, T
A1  - Durley, R C
A1  - Simpson, G M
A1  - Seetharama, N
TI  - Drought resistance of Sorghum bicolor. 6. Changes in endogenous growth regulators of plants grown across an irrigation gradient
UR  - http://dx.doi.org/10.4141/cjps83-013
JF  - Canadian Journal of Plant Science
SN  - 1918-1833
PB  - Agricultural Institute of Canada 
N2  - A gradient of water stress was created among sorghum plants with a line-source sprinkler irrigation system. Changes in endogenous growth regulators, leaf water potential (?w), solute potential (?s), leaf conductance, leaf temperature, leaf senescence, leaf area and plant height were monitored. Abscisic acid (AbA) levels were increased and phaseic acid (PA) levels were reduced under stress. IAA levels could not be related to stress. Leaf ?w, leaf ?s and leaf conductance were reduced and leaf temperature was increased by water stress. Leaf area development was more sensitive to stress than stem elongation. Linear correlations between irrigation, AbA, leaf ?w, leaf ?s and plant height were high (r?>?0.9). The correlation between AbA and grain yield (r?=???0.65) was similar to that between irrigation and grain yield (r?=?0.68), but opposite in sign. Leaf AbA content measured during early growth could thus be used to predict grain yield under a given irrigation regime.Key words: Abscisic acid, phaseic acid, indole-3-acetic acid, water stress, grain yield, sorghum
KW  - Abscisic acid
KW  -  phaseic acid
KW  -  indole-3-acetic acid
KW  -  water stress
KW  -  grain yield
KW  -  sorghum
Y1  - 1983///
SP  - 147
ID  - icrisat6924
EP  - 155
VL  - 63
IS  - 1
ER  -