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Plant and Cell Physiology, 1967, Vol. 8, No. 3 459-465
© 1967

Article

EFFECT OF AUXIN AND ANTIAUXIN ON THE GROWTH AND RNA SYNTHESIS OF ETIOLATED PEA INTERNODE

YOSHIO MASUDA and EIICHI TANIMOTO

Laboratory of Cell Biology, Faculty of Science, Osaka City University Sumiyoshi-ku, Osaka

Using etiolated Alaska pea internode segments the following results were obtained.

An auxin, 2,4-dichlorophenoxyacetic acid, 1 mg/liter, induced the elongation growth of the segment and stimulated the biosynthesis of RNA, particularly of messengar RNA, in 3 hr incubation. The similar stimulation of RNA synthesis and of elongation due to indole-3-acetic acid was found in 1 hr incubation. The stimulative effect of 2,4-dichlorophenoxyacetic acid on the elongation and on the synthesis of messenger RNA was inhibited by the addition of an antiauxin, transcinnamic acid. Significance of the auxin-induced synthesis of messenger RNA in producing protein responsible for the stress relaxation of cell wall is discussed.

(Received June 13, 1967; )
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