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EFFECT OF YEAST SEXUAL HORMONES ON ELONGATION OF AVENA COLEOPTILE
Author(s) -
MASUDA YOSHIO,
SHIMODA CHIKASHI,
TAKAO NARAO,
YANAGISHIMA NAOHIKO
Publication year - 1970
Publication title -
development, growth and differentiation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.864
H-Index - 66
eISSN - 1440-169X
pISSN - 0012-1592
DOI - 10.1111/j.1440-169x.1970.00207.x
Subject(s) - coleoptile , elongation , hormone , testosterone (patch) , auxin , yeast , saccharomyces cerevisiae , biology , chemistry , biochemistry , endocrinology , medicine , materials science , ultimate tensile strength , metallurgy , gene
A bstract Effect of yeast ( Saccharomyces cerevisiae ) sexual hormones on the elongation of etiolated Avena coleoptile segments was studied. The elongation was promoted by a hormone excreted by cells of mating type a , but not by α hormone excreted by cells of α type. The effect of the former was as great as that of 5 mg/1 indole‐3‐acetic acid in the first hour of application. The optimal concentration of a hormone was 10 units/ml. Its growth promoting effect was greatly inhibited by an antiauxin, 2,4,6‐trichlorophenoxyacetic acid. a Hormone increased cell wall extensibility just as auxin does. Testosterone, β‐estradiol, progesterone and ergosterol showed very little effect on the elongation of coleoptile segments.