Morphophysiological and molecular evidence supporting the augmentative role of Piriformospora indica in mitigation of salinity in Cucumis melo L.

Authors:
Dr Danial Hassani, PhD
Dr Danial Hassani, PhD
Nanjing Forestry University
China
Muhammad Khalid
Muhammad Khalid
The Royal Veterinary College
United Kingdom
Danfeng Huang
Danfeng Huang
Shanghai Jiaotong University
China
Yi-dong Zhang
Yi-dong Zhang
North China Coal Medical University
China

Acta Biochim Biophys Sin (Shanghai) 2019 Mar;51(3):301-312

School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, China.

Salinity is one of the major limiting factors in plant growth and productivity. Cucumis melo L. is a widely cultivated plant, but its productivity is significantly influenced by the level of salinity in soil. Symbiotic colonization of plants with Piriformospora indica has shown a promotion in plants growth and tolerance against biotic stress. In this study, physiological markers such as ion analysis, antioxidant determination, proline content, electrolyte leakage and chlorophyll measurement were assessed in melon cultivar under two concentrations (100 and 200 mM) of NaCl with and without P. indica inoculation. Results showed that the endophytic inoculation consistently upregulated the level of antioxidants, enhanced plants to antagonize salinity stress. The expression level of an RNA editing factor (SLO2) which is known to participate in mitochondria electron transport chain was analyzed, and its full mRNA sequence was obtained by rapid amplification of cDNA ends (RACE). Under salinity stress, the expression level of SLO2 was increased, enhancing the plant's capability to adapt to the stress. However, P. indica inoculation further elevated the expression level of SLO2. These findings suggested that the symbiotic association of fungi could help the plants to tolerate the salinity stress.

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Source
http://dx.doi.org/10.1093/abbs/gmz007DOI Listing
March 2019
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