Cochliobolus sp. acts as a biochemical modulator to alleviate salinity stress in okra plants

Salinity stress can severely affect the growth and production of the crop plants. Cheap and reliable actions are needed to enable the crop plants to grow normal under saline conditions. Modification at the molecular level to produce resistant cultivars is one of the promising, yet highly expensive t...

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Bibliographic Details
Published in:Plant physiology and biochemistry 2019-06, Vol.139, p.459-469
Main Authors: Bibi, Nusrat, Jan, Gul, Jan, Farzana Gul, Hamayun, Muhammad, Iqbal, Amjad, Hussain, Anwar, Rehman, Hazir, Tawab, Abdul, Khushdil, Faiza
Format: Article
Language:English
Subjects:
Cochliobolus lunatus
Endophytic fungi
Okra plants
Physicochemical attributes
Salinity tolerance
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Summary:Salinity stress can severely affect the growth and production of the crop plants. Cheap and reliable actions are needed to enable the crop plants to grow normal under saline conditions. Modification at the molecular level to produce resistant cultivars is one of the promising, yet highly expensive techniques, whereas application of endophytes on the other hand are very cheap. In this regard, the role of Cochliobolus sp. in alleviating NaCl-induced stress in okra has been investigated. The growth and biomass yield, relative water content, chlorophyll content and IAA were decreased, whereas malondialdehyde (MDA) and proline content were increased in okra plants treated with 100 mM NaCl. On the contrary, okra plants inoculated with C. lunatus had higher shoot length, root length, plant dry weight, chlorophyll, carotenoids, xanthophyll, phenolicss, flavonoids, IAA, total soluble sugar and relative water content, while lower MDA. LC-MS/MS analysis of the Cochliobolus sp. extract revealed the presence of pinocembrin, chlorogenic acids, wogonin, calycosin and diadzein as a salinity stress reliever. From the results, it can be concluded that colonization of Cochliobolus sp. improves the NaCl tolerance by ameliorating the physicochemical attributes of the host plants. •A potent entophytic fungus isolated from the Mirabilis jalapa was tested for plant growth promotion in okra plants under salinity stress.•The exogenous supply of Cochliobolus sp. supported the okra plants under salinity by influencing the plant endogenous hormones and biomolecules.•The Cochliobolus sp. acted as a salt stress reliever in okra plants indicated that it can be used as bio-fertilizer to grow crops in saline areas.
ISSN:0981-9428
1873-2690
DOI:10.1016/j.plaphy.2019.04.019