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In vivo net CO2 exchange characteristics of attached Brassicapods were studied during the entire period of their growth anddevelopment after anthesis. 14CO2 was fed both from the externalatmosphere and internally through the pod cavity, and the anatomyof the pod-wall was examined microscopically. Stomata were observedin the outer epidermal layer of the pod wall. Net in vivo CO2fixation by the pods was observed throughout the period of theirdevelopment and was maximum on day 42 after anthesis (DAA).Compared to the internal feeding experiments, 14CO2 fixationfrom the external environment was very high. Apparent translocationof fixed carbon from the pod wall to seeds was rapid. Pod photosynthesiscontributed substantially to seed growth. pods, Brassica campestris L., CO2 fixation, stomata 相似文献
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