African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6709

Full Length Research Paper

Induction of antioxidant system in niger (Guizotia abyssinica Cass.) under drought stress

Kavya H. Naik
  • Kavya H. Naik
  • Department of Biochemistry, Central College Campus, Bangalore University, Bengaluru, India.
  • Google Scholar
Varadahalli R. Devaraj
  • Varadahalli R. Devaraj
  • Department of Biochemistry, Central College Campus, Bangalore University, Bengaluru, India.
  • Google Scholar


  •  Received: 03 September 2017
  •  Accepted: 27 September 2017
  •  Published: 12 October 2017

Abstract

Drought stress is a highly pervasive and economically damaging abiotic stress that affects plant yield and productivity worldwide. Physiologically, drought stress in plants is associated with oxidative stress leading to tissue damage. Drought stress imposed over 72 h in 10 days old seedlings of Guizotia abyssinica Cass, niger (cv; RCR-18) under greenhouse conditions resulted in elevated levels of oxidative stress markers such as H2O2, malondialdehyde, proline, reduced glutathione and ascorbate in a time-dependent manner. Levels of antioxidant enzymes: peroxidases and glutathione reductase, and metabolic enzyme: amylase and acid phosphatase were moderately enhanced. The levels of stress markers, antioxidants, and recovery upon re-watering suggested that the antioxidant system in niger could withstand the drought stress for up to 48 h under greenhouse conditions.

 

Key words: Drought stress, antioxidants, antioxidant enzymes, malondialdehyde, abiotic stress.