Mitigation of low temperature stress and plant growth promotion in barley (Hordeum vulgare L.) by inoculation of psychrotrophic P-solubilizing Serratia nematodiphila EU-PW75

Kour, Divjot and Yadav, Ajar Nath (2023) Mitigation of low temperature stress and plant growth promotion in barley (Hordeum vulgare L.) by inoculation of psychrotrophic P-solubilizing Serratia nematodiphila EU-PW75. CEREAL RESEARCH COMMUNICATIONS, 51 (2). pp. 527-535. ISSN 0133-3720 (print), 1788-9170 (online)

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Abstract

Agriculture is one of the exposed sectors to abiotic stress conditions. There are diverse abiotic stress in which low temperature is an important abiotic stress limiting plant growth and development. The low temperature (0–20 °C) adaptive microbial communities are of particular interest because of their adaptability to prevailing conditions. Phosphorus is an important growth nutrient for the plants. Low temperature and phosphorus limitations act as the stress factors for the plants. Psychrotrophic microbiomes with P-solubilizing ability are gaining attention because of their amazing role in enhancing the availability of P and growth under low temperatures. In the present study, different crops with their rhizospheric soil from Poonch region of Jammu and Kashmir were collected for isolation of potential plant growth promoting psychrotrophic bacteria. A total of 65 isolates were obtained on different growth media. Among 65 isolates, 29 exhibited P-solubilizing capability. On basis of P-solubilizing ability and multiple PGP attributes, bacterial strain EU-PW75 was identified on basis of 16S rRNA gene sequencing as Serratia nematodiphila. The strain EU-PW75 was used for plant growth promotion of barley under conditions of low temperature where it efficiently improved the growth and physiological parameters of barley. The low temperature adaptive microbes with PGP activities could be useful for cold stress alleviation and plant growth promotion of crops growing under the low temperature.

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