RESPONSE OF GROWTH, FLOWERING, SEED YIELD AND SEED GERMINABILITY OF SWEET PEPPER TO PACLOBUTRAZOL FOLIAR SPRAY | ||
| Fayoum Journal of Agricultural Research and Development | ||
| Article 7, Volume 19, Issue 2, July 2005, Pages 64-78 PDF (454 K) | ||
| Document Type: Research articles. | ||
| DOI: 10.21608/fjard.2005.197834 | ||
| Author | ||
| Mostafa M. Rady | ||
| Botany Dept., Fac. Agric., Fayoum Branch, Cairo Univ., Egypt. | ||
| Abstract | ||
| A field trial was conducted during the two successive seasons 2003 and 2004 in the Experimental Farm, Faculty of Agriculture, Fayoum, Cairo University to investigate the influence of paclobutrazol (PP333) foliar spray at the rates 5, 10, 15 and 20 mg l-1 on growth, flowering, seed yield, seed germinability as well as some chemical constituents of sweet pepper (Capsicum annuum L.) plants. Convincing influences of PP333 treatments, especially at the rate 15 mg l-1 were observed on all studied parameters during the two growing seasons. Vegetative growth characters, floral traits, seed yield and its components, seed germinability, leaf pigments concentrations, and some nutrients concentrations in leaves were positively affected in PP333-treated plants. Spraying plants foliage with PP333 at all studied rates significantly reduced plant height, leaf area leaf-1, and leaf area plant-1 at the same time in which No. of main shoots plant-1, No. of lateral shoots on main stem plant-1, No. of leaves plant-1, fresh and dry weights of leaves and canopy plant-1, stem thickness upon the soil surface, flowering time, No. of flowers plant-1, pollen viability, fruit set% (only in the second season), No. of fruits plant-1, No. of seeds fruit-1, seed yield fruit-1, plant-1 and feddan-1, seed germination%, germination rate, chlorophylls (a, b and total) and carotenoids concentrations in fresh leaves, and nutrients (N, P, K, Fe, Mn, and Zn) concentrations in dry matter of leaves were significantly increased. On the other hand, fruit set% (only in the first season) and seed weight index nonsignificantly affected under the same treatments In view of these results, growth, flowering, seed production, and germinability of the developing seeds of sweet pepper could be improved by the foliar application of PP333 at the rate 15 mg l-1. | ||
| Keywords | ||
| Sweet pepper; Capsicum annuum L; paclobutrazol (PP333); growth; flowering; seed yield; seed germinability | ||
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