Journal of Stress Physiology &
Biochemistry, Vol. 9 No. 1
2013, pp. 258-272 ISSN 1997-0838
Original Text Copyright (cc) 2013 by Ibrahim, El-Shahaby,
Abo-Hamed and Younis
ORIGINAL
ARTICLE
Data source : Google Scholar
QueryDate : 2016-12-24
Cites : 4
Parental Drought and
Defoliation Effect on Yield, Grains Biochemical Aspects and Drought
Performance of Sorghum Progeny
Ibrahim A.H.1,2,
El-Shahaby O.A.3, Abo-Hamed S.A.3, Younis M.E.3 1 Department of Biological Sciences, Faculty of
Education at Al-Arish, North Sinai, Egypt 2 Present address: University college at Al Qunfida, Umm
Al-Qura University, Saudia Arabia 3 Department of Botany, Faculty of Science, Mansoura
University, Egypt
*E-Mail: ibrahim2910@yahoo.com
Received October 30, 2012
This study was
designed to evaluate the effect of drought stress and drought with
defoliation on yield parameters of three sorghum varieties (Giza 15,
Dorado and Hybrid 113). Also, the effect of these parental stress
treatments on drought performance of progeny of the most drought
tolerant variety was investigated. Application of drought stress in the
vegetative stage non significantly affected panicles number, grain
yield and harvest index of all cultivars. Drought stress in the
reproductive stage of Giza 15 and Hybrid 113 cultivars caused a two
fold increase in length of lateral branch and panicles number. However,
grain yield and total panicles weight were significantly reduced in all
cultivars due to this stress. Application of drought with defoliation
in the vegetative stage reduced shoot and straw weights, and grain
yield in sorghum in comparison with drought stress only. Protein-N and
polysaccharides content were decreased in parent grains in response to
water stress.
The stress intensity index (SII) of progeny from drought- subjected
parents was about 30-fold greater than SII of progeny from control
parents. Further, SII of progeny from parents exposed to drought stress
in the reproductive stage was higher than the SII of progeny from
parents subjected to drought stress in the vegetative stage . A strong
negative correlation appeared between the stress intensity index of the
progeny and polysaccharides content of parent grains. Based on
our research parental defoliation did not improve the drought
resistance of sorghum progeny.
