Seed Biopriming with Salt-Tolerant Endophytic Pseudomonas geniculata -Modulated Biochemical Responses Provide Ecological Fitness in Maize ( Zea mays L.) Grown in Saline Sodic Soil

Shailendra Singh, Udai B. Singh, Mala Trivedi, Pramod Kumar Sahu, Surinder Paul, Diby Paul and Anil Kumar Saxena
Additional contact information
Shailendra Singh: Plant-Microbe Interaction and Rhizosphere Biology Lab, ICAR-National Bureau of Agriculturally Important Microorganisms, Kushmaur, MaunathBhanjan 275 103, India
Udai B. Singh: Plant-Microbe Interaction and Rhizosphere Biology Lab, ICAR-National Bureau of Agriculturally Important Microorganisms, Kushmaur, MaunathBhanjan 275 103, India
Mala Trivedi: Amity Institute of Biotechnology, Amity University Uttar Pradesh, Lucknow 227 105, India
Pramod Kumar Sahu: Plant-Microbe Interaction and Rhizosphere Biology Lab, ICAR-National Bureau of Agriculturally Important Microorganisms, Kushmaur, MaunathBhanjan 275 103, India
Surinder Paul: Plant-Microbe Interaction and Rhizosphere Biology Lab, ICAR-National Bureau of Agriculturally Important Microorganisms, Kushmaur, MaunathBhanjan 275 103, India
Diby Paul: Pilgram Marpeck School of Science, Technology, Engineering and Mathematics, TruettMcConnel University, 100 Alumni Dr., Cleveland, GA 30528, USA
Anil Kumar Saxena: Plant-Microbe Interaction and Rhizosphere Biology Lab, ICAR-National Bureau of Agriculturally Important Microorganisms, Kushmaur, MaunathBhanjan 275 103, India

IJERPH, 2019, vol. 17, issue 1, 1-19

Abstract: Under changing climate, soil salinity and sodicity is a limiting factor to crop production and are considered a threat to sustainability in agriculture. A number of attempts are being made to develop microbe-based technologies for alleviation of toxic effects of salts. However, the mechanisms of salt tolerance in agriculturally important crops are not fully understood and still require in-depth study in the backdrop of emerging concepts in biological systems. The present investigation was aimed to decipher the microbe-mediated mechanisms of salt tolerance in maize. Endophytic Pseudomonas geniculate MF-84 was isolated from maize rhizosphere and tagged with green fluorescent protein for localization in the plant system. Confocal microphotographs clearly indicate that MF-84 was localized in the epidermal cells, cortical tissues, endodermis and vascular bundles including proto-xylem, meta-xylem, phloem and bundle sheath. The role of P. geniculate MF-84 in induction and bioaccumulation of soluble sugar, proline and natural antioxidants enzymes in maize plant was investigated which lead not only to growth promotion but also provide protection from salt stress in maize. Results suggested that application of P. geniculate MF-84 reduces the uptake of Na + and increases uptake of K + and Ca 2+ in maize roots indicative of the role of MF-84 in maintaining ionic balance/homeostasis in the plant roots under higher salt conditions. It not only helps in alleviation of toxic effects of salt but also increases plant growth along with reduction in crop losses due to salinity and sodicity.

Keywords: Pseudomonas geniculata; seed biopriming; ecological fitness; maize; soil salinity and sodicity; salt stress (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2019
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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