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Study of Morpho-physiological responses of Purslane to methyl jasmonate under salinity stress conditions

Document Type : Research Paper

Authors

1 Assistant Professor, Medicinal Plants Research Center, Shahed University, Tehran, Iran.

2 Former M.Sc. Student, Green Space of Tehran Municipality, Tehran, Iran.

3 Former M.Sc. Student, Medicinal Plants Research Center, Shahed University, Tehran, Iran.

Abstract

In order to investigate the morpho-physiological responses of Purslane plant to methyl jasmonate under salinity stress a split plot based on a completely randomized design with two factors and three replications was carried out in medicinal plants research center, Shahed University, Tehran during 2017. The factors were, salinity with four levels (0, 3, 6 and 9 dS/m) as a main factor and methyl jasmonate with four levels (0, 0.25, 0.5 and 0.75 mM) as a sub factor. The results showed that by increasing salinity levels, the growth indices such as root length, fresh weight of root, chlorophyll b, total chlorophyll and the amount of superoxide dismutase decreased, while by increasing the salinity levels the proline content and the activity of catalase and MDA in the leaf increased. Applying methyl jasmonate under salinity stress reduced the growth indices and photosynthetic pigments. The highest number of branches, number of leaves and chlorophyll b was obtained at 6 dS/m salinity and 0.5 mM methyl jasmonate. By increasing methyl jasmonate level, the proline content and the activity of CAT increased, while the amount of MDA and SOD enzymes decreased. Therefore, it can be concluded that the is the tolerance of Portulaca oleracea plant to salinity was up to six dS/m, and consuming low amounts of methyl jasmonate can improve yield and physiological indices in Purslane.

Keywords

References
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Journal of Crops Improvement
Volume 20, Issue 3
November 2018
Pages 667-678
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