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Plant and Cell Physiology, 1969, Vol. 10, No. 2 393-397
© 1969

Article

Formation of putrescine from ornithine and arginine in tobacco plants

D. YOSHIDA

Haiano Tobacco Experiment Station, Japan Monopoly Corporation Hatano, Kanagawa, Japan

Putrescine was formed when both DL-ornithine-2-14C and L-arginine-U-14C were injected into tobacco plants. The incorporation rate of these amino acids into putrescine was higher in potassium or sulfur deficient plants than in normal plants. Degradation of putrescine-1,4-14C injected into tobacco plants was inhibited by a potassium or sulfur deficiency. Increased accumulation of putrescine in potassium or sulfur deficient plants may be partly dependent upon this inhibition in the degradation of putrescine. Detached leaves and roots were also able to form putrescine from DL-ornithine-2-14C and L-arginine-U-14C.

(Received December 13, 1968; )
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