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Effects of Paclobutrazol and its method of application on the growth and transpiration of Acacia Mangium Seedlings


Citation

S. A., Abod and L. T., Jeng (1993) Effects of Paclobutrazol and its method of application on the growth and transpiration of Acacia Mangium Seedlings. Pertanika Journal of Tropical Agricultural Science, 16 (2). pp. 143-150. ISSN 0126-6128

Abstract

Ten-week-old potted A. mangium seedlings were subjected to a growth retardant, paclobutrazol (PP333), at concentrations of 0, 0.5, 1, 4 and 12 gil. Four methods of application were tested namely S, soil drenching at week 0; F1, foliar spray (potting soil protected from chemical) at week 0; F2, foliar spray (potting soil protected from chemical) at week 0 and 6; and S+F, soil and foliar spray (potting soil exposed to chemical spray) at week O. Plants were harvested after 12 weeks for various growth measurements. Height and leaf area increments, transpiration and stomatal conductance were monitored at weekly intervals. Paclobutrazol was found to be effective in reducing root and shoot growth, transpiration and stomatal conductance of the seedlings. Treated plants had higher root to shoot ratios. The effects of the chemical increased with increasing concentration and frequency of application for the foliar spray. The chemical was most effective when applied through the soil either l7y drenching (S) or soil and foliar spray (S+F).


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Additional Metadata

Item Type: Article
Divisions: Universiti Pertanian Malaysia
Publisher: Universiti Putra Malaysia Press
Keywords: Growth regulator; Planting stock; Plant water relations; Triazole
Depositing User: Nasirah Abu Samah
Date Deposited: 24 Nov 2009 01:47
Last Modified: 01 Sep 2015 03:25
URI: http://psasir.upm.edu.my/id/eprint/3105
Statistic Details: View Download Statistic

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