28-Homobrassinolide mitigates boron induced toxicity through enhanced antioxidant system in Vigna radiata plants

Mohammad Yusuf, Qazi Fariduddin, Aqil Ahmad

Research output: Contribution to journalArticlepeer-review

42 Citations (Scopus)

Abstract

The objective of this study was to establish relationship between boron induced oxidative stress and antioxidant system in Vigna radiata plants and also to investigate whether brassinosteroids will enhance the level of antioxidant system that could confer tolerance to the plants from the boron induced oxidative stress. The mung bean (V. radiata cv. T-44) plants were administered with 0.50, 1.0 and 2.0mM boron at 6d stage for 7d along with nutrient solution. At 13d stage, the seedlings were sprayed with deionized water (control) or 10-8M of 28-homobrassinolide and plants were harvested at 21d stage to assess growth, leaf gas-exchange traits and biochemical parameters. The boron treatments diminished growth, water relations and photosynthetic attributes along with nitrate reductase and carbonic anhydrase activity in the concentration dependent manner whereas, it enhanced lipid peroxidation, electrolyte leakage, accumulation of H2O2 as well as proline, and various antioxidant enzymes in the leaves of mung bean which were more pronounced at higher concentrations of boron. However, the follow-up application of 28-homobrassinolide to the boron stressed plants improved growth, water relations and photosynthesis and further enhanced the various antioxidant enzymes viz. catalase, peroxidase and superoxide dismutase and content of proline. The elevated level of antioxidant enzymes as well as proline could have conferred tolerance to the B-stressed plants resulting in improved growth, water relations and photosynthetic attributes.

Original languageEnglish
Pages (from-to)1574-1584
Number of pages11
JournalChemosphere
Volume85
Issue number10
DOIs
Publication statusPublished - Nov 2011
Externally publishedYes

Keywords

  • Antioxidant enzymes
  • Boron toxicity
  • Brassinosteroids
  • Lipid peroxidation
  • Oxidative stress
  • Photosynthesis

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • Chemistry(all)
  • Pollution
  • Health, Toxicology and Mutagenesis

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