RESPONSES OF DIFFERENT WHEAT CULTIVARS TO POST ANTHESIS DROUGHT STRESS

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MOMTAZI F.

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

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Paper Information

Journal: PLANT ECOPHYSIOLOGY (ARSANJAN BRANCH) Year:2011 | Volume:3 | Issue:9 Page(s): 1-17

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Title

RESPONSES OF DIFFERENT WHEAT CULTIVARS TO POST ANTHESIS DROUGHT STRESS

Author(s)

MOMTAZI F. | Issue Writer Certificate

Keywords

WHEATQ3

YIELDQ2

GRAIN WEIGHTQ2

REMOBILIZATIONQ2

STEM RESERVESQ2

CURRENT PHOTOSYNTHESISQ2

Abstract

Stem-stored carbohydrate from pre-anthesis period had an important role in supporting assimilates for growing grain in drought stress during grain filling period. An experiment was conducted in 2007-8 in experimental farm of Islamic Azad University of Arsanjan, to investigate the quantity of STEM RESERVES in different WHEAT cultivars of different heights. The randomized block, split-plot design was used in the experiment. Main plots consisted of three irrigation regimes (full irrigation, only one irrigation in post-anthesis and without irrigation during post-anthesis period) and subplot consisted of six WHEAT cultivars (Marvdasht, Falat, Ghods, Karaj3, Adl and Kaveh). At physiological maturity, grain YIELD, biological YIELD, YIELD components, plant height and stem weight were measured. The results showed that water holding in post-anthesis period significantly reduced grain YIELD, biological YIELD, GRAIN WEIGHT and stem weight. Grain YIELD, biological YIELD, harvest index, number of ear m-2, number of seed ear-1 and plant height were significantly different in different cultivars. The interaction effects of cultivars and irrigation indicates that different cultivars respond differently to reduction of irrigation. By withholding post-anthesis irrigation the adverse effects of drought on GRAIN WEIGHT and grain YIELD in tall cultivars were lower in comparison with dwarf cultivars. Losses of stem weight with irrigation withholding were higher in tall cultivars. These results indicates that tall cultivars have more stored reserves in stem, which can be used in unfavourable condition for grain filling. In other words, REMOBILIZATION is higher in tall cultivars and this trait can be used for developing drought tolerance in breeding programs.

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APA: Copy

MOMTAZI, F.. (2011). RESPONSES OF DIFFERENT WHEAT CULTIVARS TO POST ANTHESIS DROUGHT STRESS. PLANT ECOPHYSIOLOGY (ARSANJAN BRANCH), 3(9), 1-17. SID. https://sid.ir/paper/188375/en

Vancouver: Copy

MOMTAZI F.. RESPONSES OF DIFFERENT WHEAT CULTIVARS TO POST ANTHESIS DROUGHT STRESS. PLANT ECOPHYSIOLOGY (ARSANJAN BRANCH)[Internet]. 2011;3(9):1-17. Available from: https://sid.ir/paper/188375/en

IEEE: Copy

F. MOMTAZI, “RESPONSES OF DIFFERENT WHEAT CULTIVARS TO POST ANTHESIS DROUGHT STRESS,” PLANT ECOPHYSIOLOGY (ARSANJAN BRANCH), vol. 3, no. 9, pp. 1–17, 2011, [Online]. Available: https://sid.ir/paper/188375/en

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