Changes in antioxidant potential and sink-organ dry matter with pigment accumulation induced by hexaconazole in Plectranthus forskholii Briq

Ganapathy Murugan Alagu Lakshmanan, Cheruth Abdul Jaleel, Muthiah Gomathinayagam, Rajaram Panneerselvam

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

An investigation was conducted in Plectranthus forskholii by giving it different concentrations (10, 15, 20, 25, and 30 mg L-1) of hexaconazole, a fungicide cum plant-growth regulator, in order to find out its effects on growth, pigment composition, and antioxidant potential. The treatments were given as soil drenching on different growth stages. All the concentrations of hexaconazole used significantly decreased the stem length and leaf area, whereas side branches, fresh and dry matter content, photosynthetic pigments, and antioxidant potential were increased. The number of tubers, length and girth of tubers, fresh and dry weight of tubers and tuber pigments were found to be the highest at a 25 mg L-1 concentration of hexaconazole. Hexaconazole application at 25 mg L-1 concentration was found to be more effective than 10, 15, 20, 25, and 30 mg L-1 in promoting fresh and dry weight of root tuber over 165 days after planting. The pigments like chlorophyll, carotenoid; anthocyanins, xanthophylls and antioxidants such as ascorbic acid, reduced glutathione and total phenol were significantly increased under hexaconazole treatment when compared to untreated control plants. To cite this article: G.M.A. Lakshmanan et al., C. R. Biologies 330 (2007).

Original languageEnglish
Pages (from-to)814-820
Number of pages7
JournalComptes Rendus - Biologies
Volume330
Issue number11
DOIs
Publication statusPublished - Nov 2007
Externally publishedYes

Keywords

  • Ascorbic acid
  • Dry matter
  • Hexaconazole
  • Pigments
  • Plectranthus forskholii
  • Reduced glutathione
  • Total phenol

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)
  • Immunology and Microbiology(all)
  • Agricultural and Biological Sciences(all)

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