Plant Growth-Promoting Rhizobacteria Enhance Abiotic Stress Tolerance in Solanum tuberosum Through Inducing Changes in the Expression of ROS-Scavenging Enzymes and Improved Photosynthetic Performance

Mayank Anand Gururani, Chandrama Prakash Upadhyaya, Venkidasamy Baskar, Jelli Venkatesh, Akula Nookaraju, Se Won Park

Research output: Contribution to journalArticlepeer-review

275 Citations (Scopus)

Abstract

In this report we address the changes in the expression of the genes involved in ROS scavenging and ethylene biosynthesis induced by the inoculation of plant growth-promoting rhizobacteria (PGPR) isolated from potato rhizosphere. The two Bacillus isolates used in this investigation had earlier demonstrated a striking influence on potato tuberization. These isolates showed enhanced 1-aminocyclopropane-1-carboxylic acid deaminase activity, phosphate solubilization, and siderophore production. Potato plants inoculated with these PGPR isolates were subjected to salt, drought, and heavy-metal stresses. The enhanced mRNA expression levels of the various ROS-scavenging enzymes and higher proline content in tubers induced by PGPR-treated plants contributed to increased plant tolerance to these abiotic stresses. Furthermore, the photosynthetic performance indices of PGPR-inoculated plants clearly exhibited a positive influence of these bacterial strains on the PSII photochemistry of the plants. Overall, these results suggest that the PGPR isolates used in this study are able to confer abiotic stress tolerance in potato plants.

Original languageEnglish
Pages (from-to)245-258
Number of pages14
JournalJournal of Plant Growth Regulation
Volume32
Issue number2
DOIs
Publication statusPublished - Jun 2013
Externally publishedYes

Keywords

  • Abiotic stress
  • PGPR
  • Photosynthesis
  • ROS
  • Solanum tuberosum

ASJC Scopus subject areas

  • Agronomy and Crop Science
  • Plant Science

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