Evaluation of abiotic stress tolerance in transgenic potato plants with reduced expression of PSII manganese stabilizing protein

Mayank Anand Gururani, Chandrama Prakash Upadhyaya, Reto J. Strasser, Jae Woong Yu, Se Won Park

Research output: Contribution to journalArticlepeer-review

42 Citations (Scopus)

Abstract

Manganese stabilizing protein (MSP) is an important component of the Photosystem II (PSII) oxygen evolving complex. In our previous work, transgenic potato plants with reduced expression of MSP (MSP-As) were developed and their physiological and biochemical responses were studied. In this report, we address the response of MSP-As plants toward salinity, heavy metal and osmotic stresses. MSP-As plants treated with NaCl, ZnCl2 or mannitol solution showed significant level of tolerance under all the stress conditions. Specific enzyme activities of major ROS-scavenging enzymes were found significantly higher in MSP-As plants than the control plants. MSP-As plants accumulated increased levels of proline and low molecular weight metabolites such as ascorbate and α-tocopherol, which indicated that these plants were much more resistant to stress compared to the corresponding control plants. The primary photochemical efficiencies and the OJIP kinetics analyses further confirmed that MSP-As plants were in better optimal health under stress compared to the control plants. Although the exact reason behind the increased stress tolerance in stressed MSP-As plants is unclear, our results strongly indicate the role of MSP of unknown function in abiotic stress tolerance.

Original languageEnglish
Pages (from-to)7-16
Number of pages10
JournalPlant Science
Volume198
DOIs
Publication statusPublished - Jan 2013
Externally publishedYes

Keywords

  • Abiotic stress
  • Manganese stabilizing protein
  • Oxygen evolving complex
  • Performance index
  • Photosystem II
  • Solanum tuberosum

ASJC Scopus subject areas

  • Agronomy and Crop Science
  • Genetics
  • Plant Science

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