RESPONSE OF ONION CULTIVARS TO DROUGHT AND SALINITY STRESSES AT GERMINATION STAGE AND SEED PRIMING BY CHEMICALS TO IMPROVE GERMINATION

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ARVIN M.J.; KAZEMI POOR N.

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Journal: IRANIAN JOURNAL OF HORTICULTURAL SCIENCE AND TECHNOLOGY Year:2003 | Volume:4 | Issue:3-4 Page(s): 95-104

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Title

RESPONSE OF ONION CULTIVARS TO DROUGHT AND SALINITY STRESSES AT GERMINATION STAGE AND SEED PRIMING BY CHEMICALS TO IMPROVE GERMINATION

Author(s)

ARVIN M.J. | KAZEMI POOR N. | Issue Writer Certificate

Keywords

DROUGHTQ2

GERMINATIONQ2

GIBBERELLIC ACIDQ3

ONIONQ3

POLYETHYLENE GLYCOLQ2

SALINITYQ2

Abstract

Two experiments were conducted to evaluate the response of nine ONION cultivars to DROUGHT and SALINITY stresses at GERMINATION stage and the possibility of improving stress tolerance via seed priming. In the first experiment, the treatments consisted of control (distilled water), solutions containing 25 mM POLYETHYLENE GLYCOL 6000 (PEG) to impose DROUGHT and 85mM sodium chloride to impose SALINITY stress. Traits recorded were GERMINATION percentage (GP), mean time to GERMINATION (MTG), dry weight (DW) of root and shoot and root length (RL). In the second experiment, seeds of: cv. Texas were soaked in 35mM PEG, 200ppm GIBBERELLIC ACID (GA3) and mixtures of both solutions. Treated seeds were then kept at 10°C for 21 d, thereafter; GP and MTG were recorded under salt and DROUGHT at 3 stages (wk 0, wk 1, wk 2). Effects of DROUGHT were more severe on GP than SALINITY, while for the most traits the effects of SALINITY were more severe. Under stress conditions GP of cvs. Dessex and Milky was very high, while that of cv.PX was very low. Although, significant correlation was found between DROUGHT and SALINITY for GP, some cultivars responded differently. Cvs. Primavera and Savanna were more tolerant to salt than DROUGHT. Response of cultivars to MTG was significantly different such that cvs. Primavera and Nastic had the highest and the lowest values for MTG, respectively. Significant differences were also evident between cultivars for SDW, RDW and RL. Cv. Milky had the highest SDW and the longest RL, whereas cv. Texas had the lowest RDW and the smallest RL and cv. PX had the lowest SDW. Results from the second experiment indicated that PEG and EG+GA3 treatments significantly increased GP. Interaction of seed priming and storage period was also significant so that PEG, PEG+GA3 and GA3+PEG treatments significantly increased GP of seeds tested at wk 0; whereas seeds tested at wk1 and wk 2 were only affected by PEG+GA3. Seed priming also reduced MTG compared with control and the effect of PEG was more pronounced. The effectiveness of seed priming treatments was also maintained under stress conditions and storage periods. In order to increase GP and deerease MTG, it is suggested that seeds be treated with PEG or PEG+GA3.

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اثر پتانسیلهای مختلف حاصل از پلی اتیلن گلیکول و کلرید سدیم توام با درجه حرارت بر جوانه زنی توده های گندم دیم

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APA: Copy

ARVIN, M.J., & KAZEMI POOR, N.. (2003). RESPONSE OF ONION CULTIVARS TO DROUGHT AND SALINITY STRESSES AT GERMINATION STAGE AND SEED PRIMING BY CHEMICALS TO IMPROVE GERMINATION. IRANIAN JOURNAL OF HORTICULTURAL SCIENCE AND TECHNOLOGY, 4(3-4), 95-104. SID. https://sid.ir/paper/80929/en

Vancouver: Copy

ARVIN M.J., KAZEMI POOR N.. RESPONSE OF ONION CULTIVARS TO DROUGHT AND SALINITY STRESSES AT GERMINATION STAGE AND SEED PRIMING BY CHEMICALS TO IMPROVE GERMINATION. IRANIAN JOURNAL OF HORTICULTURAL SCIENCE AND TECHNOLOGY[Internet]. 2003;4(3-4):95-104. Available from: https://sid.ir/paper/80929/en

IEEE: Copy

M.J. ARVIN, and N. KAZEMI POOR, “RESPONSE OF ONION CULTIVARS TO DROUGHT AND SALINITY STRESSES AT GERMINATION STAGE AND SEED PRIMING BY CHEMICALS TO IMPROVE GERMINATION,” IRANIAN JOURNAL OF HORTICULTURAL SCIENCE AND TECHNOLOGY, vol. 4, no. 3-4, pp. 95–104, 2003, [Online]. Available: https://sid.ir/paper/80929/en

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