Volume 10, Issue 45 (vol. 10, no. 45 2021)                   2021, 10(45): 207-234 | Back to browse issues page

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Shahbazi N, Kazemitabar S K, kiani G, Pakdin Parizi A, Mehraban Joubani P. Physiological and biochemical responses of different sesame (sesamum indicum L.) genotypes under salinity stress. Plant Process and Function 2021; 10 (45) : 14
URL: http://jispp.iut.ac.ir/article-1-1533-en.html
1- 1Department of Plant Breeding, Faculty of Crop Sciences, Sari Agricultural Sciences and Natural Resources University (SANRU), Sari, Iran
2- 1Department of Plant Breeding, Faculty of Crop Sciences, Sari Agricultural Sciences and Natural Resources University (SANRU), Sari, Iran , sdklkr@ymail.com
3- Agricultural Genetics and Biotechnology Research Institute of Tabarestan, Sari University of Agricultural Sciences and Natural Resources, sari, Iran.
4- Department of Basic Sciences, Sari University of Agricultural Sciences and Natural Resources, sari, Iran.
Abstract:   (1175 Views)
By examining physiological reactions related to salinity tolerance among different landraces and cultivars, tolerant and sensitive cultivars can be selected and used in breeding programs and cultivation development of this important oilseed. For this purpose, physiological reactions in eight different sesame genotypes in a factorial experiment based on a completely randomized design with the main salinity factor due to mixing Caspian Sea water with normal water at 3 levels (control, 6 & 9 dSm-1) and sub-factor 8 Sesame genotype including Babol, Dashtestan 2, Oltan, Pakistani, tn-78-389 and tn-78-393, Halil, Naz single-branched genotypes in three replications in pots in the greenhouse of the Plant Breeding Department of Sari University of Agricultural Sciences and Natural Resources in the year 2020 were examined. The results of this experiment showed that at salinity levels of 6 and 9 dS, among the eight different genotypes of sesame studied, Oltan cultivar with the highest amount of total dry weight (8.42 & 5.27 gr), amino acid proline (10.35 & 15 μmol/g fresh leaf weight), membrane stability index ( 82.65 & 74.14%), relative water content (81.33 & 69.33%), leaf chlorophyll and carotenoid content (based on mg/g fresh weight), chlorophyll a (0.74 & 0.7), total chlorophyll (1.12 & 0.95) and carotenoids (0.41 & 0.46) and antioxidant enzymes activities (based on enzyme unit per gram fresh weight), superoxide dismutase (18.22 & 29.05), ascorbate peroxidase (14.9 & 19.21), catalase (1.51), guaiacol peroxidase (4.8 & 5.43), potassium concentration (6.6%), sodium to potassium concentration ratio index (0.06 & 0.12) and the lowest amount of sodium ion concentration (0.41 & 0.7) were more tolerant of stress compared to other cultivars. In contrast, Pakistani cultivar with the lowest amount of total dry weight (5.12 & 2.14 gr), amino acid proline (5.86 & 6.7 μmol/g fresh leaf weight), membrane stability index (66.31 & 57.86%), relative water content (58 & 48.33%), leaf chlorophyll and carotenoid content (based on mg / g fresh weight), chlorophyll a (0.46 & 0.37), total chlorophyll (0.69 & 0.5) and carotenoids (0.25 & 0.27) and Antioxidant enzymes activities (based on unit of enzyme per gram of fresh weight), superoxide dismutase (11.61 & 10.31), ascorbate-peroxidase (8.61 & 8.78), catalase (0.84), guaiacol peroxidase ( 1.77 & 2.16), potassium concentration (3.68%), sodium to potassium concentration ratio index (0.59 & 1.12) and the highest amount of sodium ion concentration (2.15 & 2.57) were the most sensitive cultivar in stress tolerance compared to other cultivars. Based on the evaluated traits and the response of the studied cultivars to salinity stress, oltan was identified as a tolerant cultivar and Pakistani as a salinity sensitive cultivar compared to the other cultivars. Therefore, these cultivars can be suggested for use in future breeding programs to introduce new cultivars.
Article number: 14
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Type of Study: Research | Subject: Salt Stress
Received: 2021/04/30 | Accepted: 2021/07/13 | Published: 2021/12/20

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