TITLE:
Amelioration of Aluminium Toxicity in Pigeon Pea [Cajanus cajan (L.) Millsp.] Plant by 24-Epibrassinolide
AUTHORS:
N. Divya Sri, M. Madhan Mohan, K. Mahesh, K. Raghu, S. Seeta Ram Rao
KEYWORDS:
Aluminium Toxicity, 24-Epibrassinolide, Cajanus cajan, Antioxidative Enzymes
JOURNAL NAME:
American Journal of Plant Sciences,
Vol.7 No.12,
August
23,
2016
ABSTRACT: The effect of 24-epibrassinolide on growth of pigeon pea [Cajanus cajan (L.) Millsp.] under aluminium toxicity was studied. 24-EBL reduced
the impact of Al stress on plant growth. Particularly 24-EBL reduced the inhibitory
impact of aluminium toxicity on root growth which was further manifested in overall
improvement of vegetative growth. Application of 24-epibrassinolide removed the
inhibitory influence of Al nodulation. The growth stimulation in Cajanus plants by 24-EBL under Al stress
was associated with elevated levels of chlorophylls, nucleic acids and soluble proteins.
24-Epibrassinolide application enhanced proline content in Al3+ stressed Cajanus plants. Further, the supplementation
of 24-epibrassinolide to Al stress treatments increased the activities of antioxidative
enzymes viz., catalase [EC 1.11.1.6];
peroxidase [EC 1.11.1.7]; superoxide dismutase [EC 1.15.1.1] and ascorbate peroxidase
[EC 1.11.1.11]. Lipid peroxidation induced by Al was found reduced with the supplementation
of 24-epibrassinolide. The present studies demonstrated the ameliorating capability
of 24-epibrassinolide on the Al induced inhibition of plant growth of C. cajan.