The B Vitamins as Plant Hormones
1948; Elsevier BV; Linguagem: Inglês
10.1016/s0083-6729(08)60459-8
ISSN2162-2620
Autores Tópico(s)Alcoholism and Thiamine Deficiency
ResumoThis chapter reviews the present knowledge concerning the hormonal role of the B vitamins in the higher plant. The green plant taken as a whole is in general able to synthesize amounts of the B vitamins adequate for its own needs and is with few exceptions independent of any external source of the chemical substances. The individual parts of the plant differ widely in their ability to synthesize the several vitamins of the B complex. The substances considered in the chapter include thiamine, riboflavin, niacin, pyridoxine, pantothenic acid, biotin, p-aminobenzoic acid, and the purines, especially adenine. These substances are required by all living tissues, means that a tissue lacking the ability to synthesize a given vitamin must obtain its supply from other tissues of the plant. Thiamine is required by roots and the thiamine which they need is produced in the leaves and translocated to the root system. The behavior of the several vitamins of the B group in the varied physiological processes is also described in the chapter.
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