Journal
RUSSIAN JOURNAL OF PLANT PHYSIOLOGY
Volume 56, Issue 5, Pages 616-620Publisher
PLEIADES PUBLISHING INC
DOI: 10.1134/S1021443709050057
Keywords
Pelargonium graveolens; 24-epibrassinolide; growth; photosynthesis; essential oil; carbohydrates; chlorophylls
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Funding
- University Grants Commission, New Delhi, India
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The effects of 24-epibrassinolide on growth, photosynthesis, chlorophyll content, carbohydrate fractions, and essential oil content of rose scented geranium (Pelargonium graveolens (L.) Herit) were investigated. Foliar application of 24-epibrassinolide at 0.5, 1, and 3 mu M concentrations substantially increased the growth. 24-epibrassinolide at all concentrations improved herbage yield as reflected in the increase of foliar biomass. Exogenous application of 24-epibrassinolide increased the rate of photosynthesis. Growth promotion was also associated with increased chlorophyll content and resulted in the accumulation of carbohydrate fractions. At 3-mu M concentration, 24-epibrassinolide increased the total content of essential oils. The quantitative analysis of geranium oil from the geranium plant treated with 3-mu M concentration revealed an increase in geraniol content and decrease in citronellol content. The present study demonstrates a positive impact of the new group of phytohormones on the performance of geranium plant, a highly valued aromatic plant.
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