Beheshti, A.R. and Behboodi fard, B.
(2010)
Dry matter accumulation and remobilization in grain sorghum genotypes
(Sorghum bicolor L. Moench) under drought stress.
Australian Journal of Crop Science, 4 (3).
pp. 185-189.
Abstract
A field experiment was conducted during growing season of 2007-2008 at Khorasan Agricultural and Natural Resource
Research Center, Mashhad-Iran, to study dry matter accumulation and remobilization in grain sorghum genotypes under
water stress and normal conditions. The main plots were allocated to two levels of moisture regimes, including water deficit
after anthesis and normal condition (no water stress) and the subplots were disturbance photosynthesis with potassium
iodide and non disturbance on current photosynthesis and three grain sorghum genotypes (Sepideh, M5 and M2 promising
lines). The results showed that water stress significantly (p≤0.01) increased amounts of remobilized dry matter (ARDM),
remobilization efficiency (REE), remobilization percentage (REP) by 11.21%, 32.37 % and 14.20%, respectively,
compared with normal condition over all treatments. However it significantly (p≤0.05) decreased biological and grain
yield. Disturbance in current photosynthesis caused 57.79 % and 21.20 % increase in remobilization percentage and
remobilization efficiency compared to non disturbance status across all treatments. M5 genotype had the highest
remobilization percentage and remobilization efficiency as compared with the two other genotypes in all experimental
plots. The stepwise linear multiple regression
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