AMELIORATION OF THE EFFECTS OF POLYETHYLENE GLYCOL-INDUCED DROUGHT STRESS ON SIXCULTIVARS OF ALFALFA BY PACLOBUTRAZOL TREATMENT

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RAJABPOOR SHAKIBA; Hajihashemi Shokoofeh

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Journal: JOURNAL OF PLANT PROCESS AND FUNCTION Year:2017 | Volume:6 | Issue:20 Page(s): 37-48

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Title

AMELIORATION OF THE EFFECTS OF POLYETHYLENE GLYCOL-INDUCED DROUGHT STRESS ON SIXCULTIVARS OF ALFALFA BY PACLOBUTRAZOL TREATMENT

Author(s)

RAJABPOOR SHAKIBA | Hajihashemi Shokoofeh | Issue Writer Certificate

Keywords

CULTIVARQ2

DROUGHT SENSITIVEQ2

DROUGHT TOLERANTQ1

MEDICAGO SATIVAQ2

PLANT GROWTH REGULATORQ1

WATER STRESSQ1

Abstract

This investigation was carried out with the aim of determining the effect of polyethylene glycol 6000 (PEG; 0, 3%, 6% and 9% w/v) treatment on six CULTIVARs of MEDICAGO SATIVA. PEG treatment significantly decreased the germination index inCULTIVARs of Isfahani, Hamedani, Bami, Baghdadi, Yazdi and Ghare-Medicago, with the highest reduction in Ghare-Medicago and Hamedani CULTIVARs by about 50% and 44%, respectively. PEG treatment significantly decreased germination percentage and germination rate in two CULTIVARs of Ghare-Medicago (22% and 20%, respectively) and Hamedani (28% and27%, respectively) while increased mean germination time. The seedlings height, fresh weight and water content significantlydecreased in all PEG-treated CULTIVARs. The highest reduction in the mentioned factors was observed in Ghare-Medicago(43%, 24% and 55%, respectively) and Hamedani (57%, 23% and 53%, respectively), while the lowest reduction wasobserved in Yazdi, by about 28%, 9% and 17%, respectively. Data showed that PEG treatment reduced seedling dry massonly in Ghare-Medicago and Hamedani CULTIVARs by about 16% in both CULTIVARs. PEG treatment significantly decreased thechlorophyll a, b and total, anthocyanins, phenols and a-tocopherol contents of six Medicago CULTIVARs. The results ofgreenhouse experiments showed that PEG treatments resulted in a significant reduction in fresh weight, dry weight andwater content of all studied CULTIVARs. In conclusion, the findings of both petri dish and greenhouse experiments suggested that Ghare-Medicago and Hamedani CULTIVARs can be regarded as DROUGHT SENSITIVE CULTIVARs while Yazdi is a DROUGHT TOLERANT CULTIVAR. It should be noticed that Bami and Baghdadi CULTIVARs were also relatively DROUGHT TOLERANT. Also, our studyon paclobutrazol (PBZ) treatment showed that PBZ effectively decreased the negative effect of drought stress on growth ofall CULTIVARs of Medicago.

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APA: Copy

RAJABPOOR, SHAKIBA, & Hajihashemi, Shokoofeh. (2017). AMELIORATION OF THE EFFECTS OF POLYETHYLENE GLYCOL-INDUCED DROUGHT STRESS ON SIXCULTIVARS OF ALFALFA BY PACLOBUTRAZOL TREATMENT. JOURNAL OF PLANT PROCESS AND FUNCTION, 6(20), 37-48. SID. https://sid.ir/paper/234138/en

Vancouver: Copy

RAJABPOOR SHAKIBA, Hajihashemi Shokoofeh. AMELIORATION OF THE EFFECTS OF POLYETHYLENE GLYCOL-INDUCED DROUGHT STRESS ON SIXCULTIVARS OF ALFALFA BY PACLOBUTRAZOL TREATMENT. JOURNAL OF PLANT PROCESS AND FUNCTION[Internet]. 2017;6(20):37-48. Available from: https://sid.ir/paper/234138/en

IEEE: Copy

SHAKIBA RAJABPOOR, and Shokoofeh Hajihashemi, “AMELIORATION OF THE EFFECTS OF POLYETHYLENE GLYCOL-INDUCED DROUGHT STRESS ON SIXCULTIVARS OF ALFALFA BY PACLOBUTRAZOL TREATMENT,” JOURNAL OF PLANT PROCESS AND FUNCTION, vol. 6, no. 20, pp. 37–48, 2017, [Online]. Available: https://sid.ir/paper/234138/en

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