NIACIN BIOSYNTHESIS IN LEAF DISCS AND SEEDLINGS OF CATTLEYA SKINNERI (ORCHIDACEAE)

Abstract

Summary Seedlings and leaf discs of Cattleya skinneri incorporated label from 14C‐ and 3H‐labelled tryptophan into niacin. Label from [14C]glycerol and[14C]aspartate was not significantly incorporated into the vitamin.

Effects of Nutrients and Growth Regulators on Seed Germination and Development of Juvenile Rhizome Proliferation of Gastrodia elata In Vitro

“…3.2.3. Effect of Jrhs Proliferation on Media Containing Proteins, Amino Acids, B Vitamins, and Plant Growth Regulators Nitrogen or amino acids brought many benefits to growth or morphogenesis, including increased callus formation, prevention of browning, and increased protocorm-like bodies, seedlings and the yield of orchids [17,[42][43][44].…”

Biosynthesis of vitamin B3 and NAD+: incubating HepG2 cells with the alkaloid myosmine

“…6 TRP contributes possibly to formation of NA in seedlings of Zea mays, 7 and NA and NAM were detected in metabolic studies with 3 H-and 14 C-labeled TRP in the Orchidaceae species Cattleya skinneri. 8 The role of TRP and that of other potential precursors in the biosynthesis of NA and NAM in plants is still unclear in detail 9 and requires further research. In humans, TRP is predominantly provided through the diet and supplies additional precursors for serotonin, indole, tryptamine, and kynurenine biosynthesis.…”

“…The essential amino acid tryptophan (TRP) is assumed as a precursor of niacin in several micro‐organisms, plants, and fungi species 6 . TRP contributes possibly to formation of NA in seedlings of Zea mays , 7 and NA and NAM were detected in metabolic studies with 3 H‑ and 14 C‐labeled TRP in the Orchidaceae species Cattleya skinneri 8 . The role of TRP and that of other potential precursors in the biosynthesis of NA and NAM in plants is still unclear in detail 9 and requires further research.…”