Histoautoradiographic analysis of the thermoinductive processes in the shoot apex of Arabidopsis thaliana L. Heynh, vernalized at different stages of development

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概要

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• The cytochemical reactions of various zones of the shoot apex of an annual winter plant (Arabidopsis thaliana), vernalized at two different ages (26 and 85 days), were analyzed using histoautoradiography after incorporation of tritiated thymidine. The following sequence of events was observed during a cold treatment of 40 days: subapical activation (in DNA synthesis) of the rib meristem (this took place regardless of the age of the plants; dedifferentiation of axial cells (the beginning of which was earlier in the older plants). After cold treatment, the plants were resubmitted to warm temperatures under long day conditions. A re-establishment of the zonation in the meristem was seen during the first week for plants in the "intermediate stage". The activation of axial cells increased during the next two weeks and a few days later both groups of plants entered the prefloral stage followed by the formation of their first floral buds. These apical reactions were compared to those of a French variety of A. thaliana, a quantitative long-day plant, submitted to different photoperiods and to gibberellic acid (GA_3).

• 日本植物生理学会の論文

著者

• Besnard-wibaut Christiane

  Labotatoire De Cytologie Et Morphogenese Vegetales Universite Pierre Et Marie Curie

関連論文

• Histoautoradiographic analysis of the thermoinductive processes in the shoot apex of Arabidopsis thaliana L. Heynh, vernalized at different stages of development

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