Growth and photosynthetic pigments responses of two varieties of Catharanthus roseus to triadimefon treatment

Cheruth Abdul Jaleel, Ragupathi Gopi, Rajaram Panneerselvam

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56 Citations (Scopus)


Triadimefon, potential fungicide cum plant-growth retardant was used in this study to investigate its effect on the growth and the photosynthetic pigment contents of two varieties of Catharanthus roseus (L.) G. Don. The plants of both varieties were subjected to 15 mg l-1 triadimefon treatment by soil drenching 30, 45, 60, and 75 days after planting (DAP). Plants were uprooted on 90 DAP, and morphological parameters, like plant height, number of leaves, leaf area, root length and fresh and dry weights were determined. The photosynthetic pigments, like chlorophylls a and b, total chlorophyll, carotenoids, floral pigment, anthocyanin, were extracted and estimated. It was observed that plant height, number of leaves and leaf area were decreased and that root length, fresh and dry weights were increased under triadimefon treatment. The photosynthetic and floral pigments were increased under triadimefon treatment in both varieties. The results suggest that the application of this plant-growth retardant (triadimefon) has favourable effects on the reduction of plant height; it can thus be used for replacing manual hand pruning and for improving floral and vegetation colour in bedding plants like C. roseus. To cite this article: C.A. Jaleel et al., C. R. Biologies 331 (2008).

Original languageEnglish
Pages (from-to)272-277
Number of pages6
JournalComptes Rendus - Biologies
Issue number4
Publication statusPublished - Apr 2008
Externally publishedYes


  • Anthocyanin
  • Carotenoid
  • Catharanthus roseus
  • Chlorophyll
  • Plant growth retardant
  • Triadimefon

ASJC Scopus subject areas

  • General Biochemistry,Genetics and Molecular Biology
  • General Immunology and Microbiology
  • General Agricultural and Biological Sciences


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