Volume 12, Issue 33 (4-2020)                   jcb 2020, 12(33): 150-161 | Back to browse issues page


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alipour Z, gerami M, ghorbanpour A, majidian P. (2020). Study of some Morphological Responses of Stevia (Stevia rebaudiana Bertoni) to Chitosan Elicitor under Salt Stress. jcb. 12(33), 150-161. doi:10.29252/jcb.12.33.150
URL: http://jcb.sanru.ac.ir/article-1-1084-en.html
sana institute of higher education
Abstract:   (2473 Views)
     Salt stress is one of significant abiotic stresses which has negative effects on growth and production of important medicinal plants such as stevia. Thus, the aim of this study was to evaluate the interaction of chitosan in four levels (0, 0.2, 0.4 and 0.6 g/L) and salt in four levels (0, 50, 100 and 150 mM NaCl) on some of morphological properties of stevia based on factorial completely randomized design with three replication at Sana Institute of Higher Education in 2016-2017. The traits studied were plant height, fresh and dry weight of root and shoot, number of leaf, internode number, root height, leaf area index (LAI), relative leaf growth rate (RLGR) and leaf area rate (LAR). The results of analysis of variance showed that salt stress resulted in significant change of plant height, leaf number, internode number, fresh and dry weight of root and shoot, RLGR, LAR. However, the interaction of chitosan and salt stress caused improvement in the each trait above mentioned. For instance, the increase of internode number in Ch2S2 (0.4 g/L chitosan-100 mM NaCl), leaf number, fresh and dry weight of root and shoot and root height in Ch1S3 (0.2 g/L chitosan-150 mM NaCl), plant height in Ch2S2 (0.4 g/L chitosan-100 mM NaCl) and Ch1S3 (0.2 g/L chitosan-150 mM NaCl) was indicated. In addition, the treatments of Ch1S2 (0.2 g/L chitosan-100 mM NaCl), Ch2S3 (0.4 g/L chitosan-150 mM NaCl) and Ch3S3 (0/6 g/Lchitosan-150 mM NaCl) on LAR, Ch1S3 (0/2 g/L chitosan-150 mM NaCl) on RLGR showed significant increase. Therefore, the achievement of this study could present profitable data with respect to morphological traits variation in stevia under salt stress condition and chitosan elicitor in order to conserve these plants by improvement of these traits under stress.
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Type of Study: Research | Subject: General
Received: 2019/10/6 | Revised: 2020/07/8 | Accepted: 2020/01/28 | Published: 2020/05/18

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