Studies on germination, seedling vigour, lipid peroxidation and proline metabolism in Catharanthus roseus seedlings under salt stress

C. Abdul Jaleel, R. Gopi, B. Sankar, P. Manivannan, A. Kishorekumar, R. Sridharan, R. Panneerselvam

Research output: Contribution to journalArticlepeer-review

228 Citations (Scopus)

Abstract

In the present investigation, 'rosea' and 'alba' varieties of Catharanthus roseus (L.) G. Don. seeds were grown with different concentrations (15, 30, 45 and 60 mM) of sodium chloride (NaCl), in order to study the effects of salinity on germination behaviour, seedling vigour (root and shoot length), lipid peroxidation (LPO) and proline metabolism. It was found that germination was delayed at lower salinity levels and inhibited at higher salinity regimes. NaCl treatment caused a serious decrease in the early seedling growth by means of reduced seedling vigour at higher salinity levels. The LPO was estimated as thiobarbituric acid reactive substances (TBARS) and found increased under salt stress. Glycine betaine (GB) and proline (PRO) contents significantly accumulated in both the varieties of seedlings under salt stress. Under NaCl stress, the activity of proline oxidase (PROX) decreased and the γ-glutamyl kinase (γ-GK) activity increased.

Original languageEnglish
Pages (from-to)190-195
Number of pages6
JournalSouth African Journal of Botany
Volume73
Issue number2
DOIs
Publication statusPublished - Apr 2007
Externally publishedYes

Keywords

  • Catharanthus roseus
  • Glycine betaine
  • Proline
  • Proline oxidase
  • Salinity
  • γ-Glutamyl kinase

ASJC Scopus subject areas

  • Plant Science

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