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Plant Growth Regulation
Chmelnitsky, I., Kennedy-Leigh Center of Horticultural Research, Faculty of Agriculture, Food and Environmental Science, Hebrew University of Jerusalem, Rehovot 76100, Israel
Azizbekova, N., Kennedy-Leigh Center of Horticultural Research, Faculty of Agriculture, Food and Environmental Science, Hebrew University of Jerusalem, Rehovot 76100, Israel
Khayat, E., Department of Research and Development, Rahan Meristem, Rosh Hanikra, Western Galilee 22825, Israel
Zieslin, N., Kennedy-Leigh Center of Horticultural Research, Faculty of Agriculture, Food and Environmental Science, Hebrew University of Jerusalem, Rehovot 76100, Israel
Anatomical and morphological development of a homeotic malformation known as phyllody has been investigated in rose flowers (Rosa hybrida cv. Motrea). The anatomical examination revealed that the phyllody of rose flowers is ensured from pistil transformation into leaf-like organs (phylloids). The study showed that the formation of leaf-like organs in place of the pistils results from the cessation of normal pistil development expressed by absence of marginal cell fusion of the style-tube primordia. The unfolded style-tube develops transformed to a green leaf-like organ containing chlorophyll and stomata. On the other hand, the ovary-sack although containing stomata as well as remained chlorophyll, only partially malformed. Transverse section SEM showed that the anatomical structure of the leaf-like organs was similar to that of cauline leaves rather than to sepals. Following the results of the present study demonstrating the evolutionary association of floral organs with leaves a hypothesis describing phyllody formation as an evolutionary regression is proposed.
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Morphological development of normal and phyllody expressing Rosa hybrida cv. Motrea flowers
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Chmelnitsky, I., Kennedy-Leigh Center of Horticultural Research, Faculty of Agriculture, Food and Environmental Science, Hebrew University of Jerusalem, Rehovot 76100, Israel
Azizbekova, N., Kennedy-Leigh Center of Horticultural Research, Faculty of Agriculture, Food and Environmental Science, Hebrew University of Jerusalem, Rehovot 76100, Israel
Khayat, E., Department of Research and Development, Rahan Meristem, Rosh Hanikra, Western Galilee 22825, Israel
Zieslin, N., Kennedy-Leigh Center of Horticultural Research, Faculty of Agriculture, Food and Environmental Science, Hebrew University of Jerusalem, Rehovot 76100, Israel
Morphological development of normal and phyllody expressing Rosa hybrida cv. Motrea flowers
Anatomical and morphological development of a homeotic malformation known as phyllody has been investigated in rose flowers (Rosa hybrida cv. Motrea). The anatomical examination revealed that the phyllody of rose flowers is ensured from pistil transformation into leaf-like organs (phylloids). The study showed that the formation of leaf-like organs in place of the pistils results from the cessation of normal pistil development expressed by absence of marginal cell fusion of the style-tube primordia. The unfolded style-tube develops transformed to a green leaf-like organ containing chlorophyll and stomata. On the other hand, the ovary-sack although containing stomata as well as remained chlorophyll, only partially malformed. Transverse section SEM showed that the anatomical structure of the leaf-like organs was similar to that of cauline leaves rather than to sepals. Following the results of the present study demonstrating the evolutionary association of floral organs with leaves a hypothesis describing phyllody formation as an evolutionary regression is proposed.
Scientific Publication
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