Prospects for applications ofrol genes for crop improvement |
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Authors: | Theo P M van der Salm Charlotte H Hänisch ten Cate Hans J M Dons |
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Institution: | (1) Department of Developmental Biology, Centre for Plant Breeding and Reproduction Research (CPRO-DLO), P.O. Box 16, 6700 AA Wageningen, The Netherlands |
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Abstract: | Prospects for the applications ofrol genes for crop improvement are discussed. As suggested in many reports, rol genes are suitable tools to modify plant developmental
processes, such as formation of adventitious roots and release of axillary buds from apical dominance. Practical applications,
however, might be hampered by the many pleiotropic side effects that are observed in plants transformed withrol genes. Alternative approaches need to be developed, therefore, to overcome these undesired effects. We offer a novel approach
for application that is clearly different from earlier strategies, and that is based on the application ofrol genes incombination plants; i.e., plants consisting of an untransformed scion grafted on a rootstock transformed with arol gene. In rose it was demonstrated for the first time that expression ofrol genes in rootstocks led to an accelerated release of axillary buds of the untransformed scion, but without the transmission
of many undesired pleiotropic effects. We expect that this stimulation will result in a changed plant architecture leading
to a more efficient production of roses. Alternatively, the pleiotropic effects may be overcome by employingrol genes that are driven by organ- or tissue-specific promoters, leading to a more defined expression of these genes. |
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Keywords: | Agrobacterium rhizogenes A tumefaciens growth rol genes roots transformation |
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