Response of rice-mycorrhizal association to arsenate exposure

  • Varsha Pathare
  • Anurakti Shukla
  • Sudhakar Srivastava
  • Penna Suprasanna

Abstract

Rice-mycorrhizal association helps the plants in
phosphate acquisition and improves stress tolerance.
The aim of present study was to analyse the impact
of arsenic (As) - stress on mycorrhiza colonized (Co)
and non-colonized (NCo) rice plants with respect to antioxidant
mechanism. The rice seedlings were grown
initially under control conditions for 45 d for establishment
of mycorrhizal association. The Co and NCo
plants were then subjected to 12.5 ¹M arsenate [As(V)]
exposure for 1 d and 3 d in hydroponics. The Co
plants showed significant stimulation in activities of
various antioxidant enzymes viz., superoxide dismutase
(SOD), guaiacol peroxidase (GPX), catalase (CAT) and
glutathione reductase (GR) in both root and shoot upon
As(V) exposure as compared to that of NCo plants. Consequently,
a notable increase in the photosynthetic pigments
and decrease in H2O2 level and lipid peroxidationwas
observed in Co plants subjected to As(V) stress
in comparison to that of NCo plants. Hence, myccorhizal
symbiosis was found to be effective in imparting
tolerance to As stress and could serve as a potential
strategy to mitigate As toxicity in rice in future.

Published
2017-05-16
How to Cite
PATHARE, Varsha et al. Response of rice-mycorrhizal association to arsenate exposure. Bulletin of Environmental and Scientific Research, [S.l.], v. 6, n. 2, p. 1-6, may 2017. ISSN 2278-5205. Available at: <http://besr.org.in/index.php/besr/article/view/80>. Date accessed: 17 sep. 2019.
Section
Articles