Patterns of photoassimilate translocation to reproductive shoots from adjacent shoots in Camellia sasanqua by manipulation of sink-source balance between the shoots
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To know to what extent reproductive shoots are autonomous in Camellia sasanqua, we manipulated the sink-source balance between the reproductive shoots and their adjacent shoots by selecting vegetative or reproductive adjacent shoots, or defoliating the reproductive shoots, and photosynthetically labeled adjacent shoots with 13C. The atom% of 13C did not increase in the unlabeled shoots that had leaves, whereas that in the defoliated, unlabeled shoot was significantly increased. These results indicated that the pattern of translocation of photoassimilates to adjacent reproductive shoots occurs depending on the sink-source balance between shoots.
KeywordsBranch autonomy Camelliasasanqua Thunb. Sink-source balance 13C Tracer experiment
We thank Prof. S. Nakano and Dr. H. Miyasaka for the use of the mass spectrometer. We also thank Drs. S.F. Hasegawa, Y. Miyazaki and H. Haga for supporting the 13C tracer experiment. This study was supported by the grant from the Ministry of Education, Science, Sports and Culture of Japan (No. 16207002).
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