EFFECT OF WATER DEFICIT STRESS ON HETEROTROPHIC SEEDLING GROWTH OF WHEAT

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ZEYNALI E.; SOLTANI A.A.F.

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Journal: Journal of Agricultural Sciences and Natural Resources Year:2001 | Volume:7 | Issue:4 Page(s): 113-122

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Title

EFFECT OF WATER DEFICIT STRESS ON HETEROTROPHIC SEEDLING GROWTH OF WHEAT

Author(s)

ZEYNALI E. | SOLTANI A.A.F. | Issue Writer Certificate

Keywords

HETEROTROPHIC SEEDLING GROWTHQ4

WHEATQ3

DROUGHT STRESSQ2

SEED RESERVE DEPLETION RATIOQ4

CONVERSION EFFICIENCY.Q4

Abstract

In germination stage, decreasing WHEAT seedling growth as affected by DROUGHT STRESS is a common phenomenon. Seedling growth can be defined as a product of three components: (1) Initial seed dry weight, (2) Fraction of seed reserves mobilized, and (3) CONVERSION EFFICIENCY.of mobilized reserves to seedling tissue. The objective of this study was the determination of sensitive seedling growth component in response to DROUGHT STRESS. To do this, two factorial experiments with two WHEAT cultivars (Tajan and Baconara) and various osmotic pressures induced by PEG (0 to1.8 MPa) were carried out. In experiment II, seeds were moistened for 24 h before transferring to osmotic solutions. In both experiments seedling growth (dry weight), seed reserve mobilization ratio and CONVERSION EFFICIENCY.of mobilized reserves were measured. Results showed that in both experiments seedling growth and seed reserve mobilization ratio are linearly (more or less) decreased with increasing osmotic pressure. However, PEG induced DROUGHT STRESS had no effect on CONVERSION EFFICIENCY. Pre-moistened treatment had no effect on response of seedling growth, seed reserve mobilization ratio or CONVERSION EFFICIENCY.to induced DROUGHT STRESS. But across osmotic pressures higher seedling growth (5.5 mg seedling-1) and SEED RESERVE DEPLETION RATIO (0.35 mg mg-1) and lower CONVERSION EFFICIENCY.(0.1 mg mg-1) were observed. It was concluded that decrease in seedling growth of WHEAT under DROUGHT STRESS is a result of decrease in mobilization of seed reserves (i.e. metabolic processes relating to production and activation of Gibberlin and hydrolytic enzymes).

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APA: Copy

ZEYNALI, E., & SOLTANI, A.A.F.. (2001). EFFECT OF WATER DEFICIT STRESS ON HETEROTROPHIC SEEDLING GROWTH OF WHEAT. JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES, 7(4), 113-122. SID. https://sid.ir/paper/9457/en

Vancouver: Copy

ZEYNALI E., SOLTANI A.A.F.. EFFECT OF WATER DEFICIT STRESS ON HETEROTROPHIC SEEDLING GROWTH OF WHEAT. JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES[Internet]. 2001;7(4):113-122. Available from: https://sid.ir/paper/9457/en

IEEE: Copy

E. ZEYNALI, and A.A.F. SOLTANI, “EFFECT OF WATER DEFICIT STRESS ON HETEROTROPHIC SEEDLING GROWTH OF WHEAT,” JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES, vol. 7, no. 4, pp. 113–122, 2001, [Online]. Available: https://sid.ir/paper/9457/en

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