Effect of ethrel, chlormequat chloride and paclobutrazol on growth and pyrethrins accumulation in Chrysanthemum cinerariaefolium Vis

Pyrethrins and flower yield of pyrethrum (Chrysanthemum cinerariaefolium Viz.) plants were determined after application of ethrel, chlormequat chloride and paclobutrazol. Ethrel at 50, 100, 250 and 500 mg l-l produced a significant positive effect on pyrethrins level, decreased plant height, while 5...

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Bibliographic Details
Published in:Plant growth regulation 2007-03, Vol.51 (3), p.263-269
Main Authors: Haque, S, Farooqi, A. H. A, Gupta, M. M, Sangwan, R. S, Khan, A
Format: Article
Language:English
Subjects:
Biosynthesis
Chlormequat chloride
ethephon
Flowers
paclobutrazol
pyrethrins
Retardants
Tanacetum cinerariifolium
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Summary:Pyrethrins and flower yield of pyrethrum (Chrysanthemum cinerariaefolium Viz.) plants were determined after application of ethrel, chlormequat chloride and paclobutrazol. Ethrel at 50, 100, 250 and 500 mg l-l produced a significant positive effect on pyrethrins level, decreased plant height, while 50 and 100 mg l-l significantly increased fresh and dry flower yield. Chlormequat chloride at 1000 and 2000 mg l-l and paclobutrazol (80 and 160 mg l-l) increased pyrethrins level, single flower weight and decreased plant height and flower yield. ¹⁴C-acetate incorporation studies further substantiated positive effect of growth retardants on pyrethrins biosynthesis. The effect of growth retardants on pyrethrins seems to be mediated through its effect on biosynthesis.
ISSN:0167-6903
1573-5087
DOI:10.1007/s10725-007-9170-6