Phytochrome-mediated bud development in Pisum sativum.
Light-grown dwarf peas were disbudded except for a single lateral bud, then transferred to darkness at 24° C. During the dark period the seedlings were irradiated daily for 5 or 7 min with R or FR. The buds exposed to R developed into shoots faster than those irradiated with FR. The R effect was FR reversible, and the FR effect was R reversible. The Pfr form of phytochrome thus promoted shoot growth including cell division, DNA and RNA synthesis.
Biology Department, Northeastern University, Boston.
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Khudairi
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Johnnykutty
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Agarwal