Expression of rice OSH1 gene is localized in developing vascular strands and its ectopic expression in transgenic rice causes altered morphology of leaf |
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| Authors: | Makoto Matsuoka Masanori Tamaoki Yuichi Tada Tatsuhito Fuyjimura Akemi Tagiri Naoki Yamamoto Yuriko Kano-Murakami |
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| Institution: | (1) National Institute of Agrobiological Resources, 2-1-2 Kannondai Tsukuba, 305 Ibaraki, Japan;(2) University of Tsukuba, Tennoudai Tsukuba, 305 Ibaraki, Japan;(3) Plant Biotechnology, Life Science Institute, Mitsui Toatsu Chemicals, Inc., 297 Mobara, Japan;(4) Fruit Tree Research Station, Tsukuba, 305 Ibaraki, Japan;(5) Present address: BioScience Center, Nagoya University, Nagoya, 464-01 Aichi, Japan |
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| Abstract: | Transgenic rice plants (Oryza sativa cv. Nipponbare) carrying 1 or 2 copies of a rice homeobox gene, OSH1, under the control of the CaMV 35S promoter were generated. The transgene caused altered morphology of leaf, such as ligule-replacement and abnormal division of sclerenchyma cells. The phenotype of these leaves resembles that of maize leaf morphological mutant, Knotted 1, which is caused by duplication of the KN1 gene (Veit et al., 1990). The in situ hybridization analysis has revealed that the expression of endogenous OSH1 is mainly localized in developing vascular strands of stem. We have discussed the biological roles of OSH1 in rice based on these results. |
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