Effect of plant growth regulators on floral differentiation and seed production in Jojoba (Simmondsia chinensis (Link) Schneider) |
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| Authors: | Loreto Prat Claudia Botti Thomas Fichet |
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| Institution: | 1. RISE Research Institutes of Sweden, Agrifood and Biosciences, Box 5401, 402 29, Göteborg, Sweden;2. Department of Viticulture and Oenology, Stellenbosch University, Private Bag X1, Matieland 7062, South Africa;3. Institute for Wine Biotechnology, Department of Viticulture and Oenology, Stellenbosch University, Private Bag X1, Matieland 7062, South Africa;4. Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, DK-1871 Frederiksberg, Denmark;5. School of Agriculture, Food and Rural Development, Newcastle University, Newcastle upon Tyne, United Kingdom;1. Institute for Wine Biotechnology, Department of Viticulture and Oenology, Faculty of AgriSciences, Stellenbosch University, Matieland 7602, South Africa;2. Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, DK-1001, Denmark;1. Beijing Key Laboratory of Grape Science and Enology, and CAS Key Laboratory of Plant Resources, Institute of Botany, The Chinese Academy of Sciences, Beijing 100093, PR China;2. Shijiazhuang Academy of Agriculture and Forestry Sciences, Shijiazhuang 050041, PR China;3. Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, The Chinese Academy of Sciences, Wuhan 430074, PR China |
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| Abstract: | The effect of foliar application of cytokinin (benzyl-adenine, 150 mg L?1) and gibberellin (GA4 + GA7, 150 mg L?1) on growth and flower development of 5-year-old plants of two jojoba clones was studied. The plant growth regulators were applied on October 5, 1999 (spring) and the plants were evaluated 120, 240 and 360 days after application. Shoot length, total number of nodes and number of nodes with branching were statistically different between clones but not between the growth regulator treatments.The total number of flowers on both clones was significantly increased by treatment with benzyl-adenine (BA) and significantly reduced by treatment with gibberellin. The seed yields, evaluated 180 days after application, were not statistically different from the control due to an increase in flower abortion. One clone treated with gibberellin showed a significant decrease in number and weight of seeds, the other did not.Histology of axillary buds revealed that BA application on one clone (4.11.32) enlarged the flower meristem, differentiating multiple flower production. |
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