Differential responses in water use efficiency in two varieties of Catharanthus roseus under drought stress

Cheruth Abdul Jaleel, Ragupathi Gopi, Beemarao Sankar, Muthiah Gomathinayagam, Rajaram Panneerselvam

Research output: Contribution to journalArticlepeer-review

138 Citations (Scopus)

Abstract

Two varieties, rosea and alba, of Catharanthus roseus (L.) G. Don. were screened for their water use efficiency under two watering regimes, viz. 60 and 100% filed capacity in the present study. Drought stress was imposed at 60% filed capacity from 30 to 70 days after sowing, while the control pots were maintained at 100% filed capacity throughout the entire growth period. Leaf area duration, cumulative water transpired, water use efficiency, net assimilation rate, mean transpiration rate, harvest index, biomass and yield under the water deficit level were measured from both stressed and well-watered control plants. Water use efficiency significantly increased in both varieties under water stress. Drought stress decreased leaf area duration, cumulative water transpired, net assimilation rate, mean transpiration rate, harvest index, and biomass yield in both varieties studied. Among the varieties, rosea variety showed the best results. To cite this article: C.A. Jaleel et al., C. R. Biologies 331 (2008).

Original languageEnglish
Pages (from-to)42-47
Number of pages6
JournalComptes Rendus - Biologies
Volume331
Issue number1
DOIs
Publication statusPublished - Jan 2008
Externally publishedYes

Keywords

  • Biomass yield
  • Catharanthus roseus
  • Drought
  • Gravimetric method
  • Leaf area duration
  • Net assimilation rate
  • Water use efficiency

ASJC Scopus subject areas

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

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