The influence of light, darkness, and lack of CO2 on phloem translocation in detached maize leaves
作者： Wolfgang Heyser , Oliver Leonard , Rosemarie Heyser , Eberhard Fritz , Walter Eschrich
DOI: 10.1007/BF00388654
关键词: Photosynthesis 、 Light darkness 、 Darkness 、 Zea mays 、 Botany 、 Chromosomal translocation 、 Sieve tube element 、 Starch 、 Biology 、 Phloem 、 Plant science 、 Genetics
摘要: Longitudinal strips from leaf blades of Zea mays L., with veins continuous along their whole length, proved to be a very uniform and convenient material for translocation experiments. Under normal photosynthetic conditions strong basipetal assimilate movement was shown. In the dark this persisted as long starch reserves were available. Parts exposed darkness or CO2-free air, i.e. nonphotosynthetic conditions, became sinks which attracted assimilates, having strongest effect. Microradioautographs showed that transport assimilates took place in sieve tubes phloem.
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