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Studies on the Origins of Plant Tissues and Organs by Brassica Chimeras
Wang Yan, Li Junxing, Chen Liping*
Department of Horticulture, Zhejiang University, Key Laboratory of Horticultural Plants Growth, Development and Biotechnology,Agricultural Ministry of China, Hangzhou 310058, China
Abstract: Two Brassica interspecific periclinal chimeras between tuber mustard and red cabbage which had both phenotypical and molecular markers were applied to systematically study the cell-layer origins of plant tissue and organs. The results showed that L1， L2 and L3 of SAM engaged in the formation and development of almost plant organs together， but their contributions varied in different organs. Both L1 and L2 participated the formation of leaf margin， while the adventitious root was derived from L3 only. PCR analysis suggested L2 gave rise to plant pollens， but sexual pollination trials also displayed the existence of L1-derived pollens. In conclusion， the well-marked periclinal chimeras are excellent materials for study the ontogenesis of plant tissues and organs.
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