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:: Volume 13, Issue 3 (10-2011) ::
علوم زراعی 2011, 13(3): 481-494 Back to browse issues page
Changes in polyamines concentration in grains of two bread wheat cultivars under post-anthesis water stress conditions
Abstract:   (4254 Views)
To evaluate the effect of water stress at cell division stage (from anthesis until 14 days later) and grain filling (from 14 days after anthesis until physiological maturity) on polyamines concentration in the grains and their relationships with grain development in two wheat cultivars differing in drought tolerance cv. Marvdasht (sensitive) and cv. Zagross (tolerant). A factorial experiment in randomized complet block design with three replications was carried out in glass-houses, the University of Tehran, Karaj, Iran, in 2006-2007. The concentration of putrescine in the grains of cv. Zagross was higher than cv. Marvdasht, in control treatment, however, in two water stress conditions, it significantly decreased in cv. Zagross as compared to cv. Marvdasht. The highest concentration of spermine and spermidine was observed at first sampling date at cell division stage. Water stress, in the grains of both cultivars, especially during cell division stage, concenetration of spermine and spermidine significantly increased, but was greater in cv. Zagross. In conclusion, spermine and spermidine play improratnt roles in regulating cell division and delaying of senescence and it is likely that they act in the same way as IAA and CK or in cooperation with these compounds. They are also involved in regulation and stability of cell division at early stage of development of wheat grain and formation of sink strength under water stress conditions.
Keywords: Polyamines, Putrescine, Spermidine, Spermine, Water stress and Bread wheat.
Full-Text [PDF 317 kb]   (1280 Downloads)    
Type of Study: Scientific & Research | Subject: Special
Received: 2015/02/17 | Accepted: 2015/02/17 | Published: 2015/02/17
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Changes in polyamines concentration in grains of two bread wheat cultivars under post-anthesis water stress conditions. علوم زراعی 2011; 13 (3) :481-494
URL: http://agrobreedjournal.ir/article-1-153-en.html


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Volume 13, Issue 3 (10-2011) Back to browse issues page
نشریه علوم زراعی ایران Iranian Journal of Crop Sciences
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