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Piriformospora indica improves salinity stress tolerance in Zea mays L. plants by regulating N+ and K+ loading in root and allocating K+ in shoot

Yun, P, Xu, L, Wang, S-S, Shabala, L ORCID: 0000-0002-5360-8496, Shabala, S ORCID: 0000-0003-2345-8981 and Zhang, W-Y 2018 , 'Piriformospora indica improves salinity stress tolerance in Zea mays L. plants by regulating N+ and K+ loading in root and allocating K+ in shoot' , Plant Growth Regulation, vol. 86, no. 2 , pp. 323-331 , doi: 10.1007/s10725-018-0431-3.

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Abstract

Piriformospora indica is known as a fungus that can easily colonize a wide range of plants and enhance host’s growth and tolerance to abiotic stresses, including salinity. The mechanistic basis behind this phenomenon remains poorly understood. This work was aimed to fill in this gap and reveal mechanisms enhancing salinity tolerance in maize roots colonised by P. indica. A range of agronomic and physiological characteristics were compared between inoculated and non-inoculated maize plants under 0/100/200 mM NaCl conditions. The impact of P. indica inoculation or root’s cytosolic K+ retention ability were also assessed using micro-electrode ion flux estimation technique. The results showed that inoculated plants had higher biomass, higher stomatal conductance, lower K+ efflux from roots and higher potassium content in shoots than non-inoculated plants under salt stress. Collectively, the results indicated that the beneficial effects of inoculation on plant performance under saline conditions were mainly attributed to the improved stomata operation associated with higher rate of K delivery into the shoots.

Item Type: Article
Authors/Creators:Yun, P and Xu, L and Wang, S-S and Shabala, L and Shabala, S and Zhang, W-Y
Keywords: Piriformospora indica, salinity stress, potassium loading, micro-electrode ion flux estimation, salinity, xylem loading, stomata
Journal or Publication Title: Plant Growth Regulation
Publisher: Kluwer Academic Publ
ISSN: 0167-6903
DOI / ID Number: 10.1007/s10725-018-0431-3
Copyright Information:

Copyright 2018 Springer Nature B.V.

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