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AUXIN RELATIONSHIPS IN THE ALASKA PEA (PISUM SATIVUM)
Author(s) -
Scott Tom K.,
Briggs Winslow R.
Publication year - 1960
Publication title -
american journal of botany
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.218
H-Index - 151
eISSN - 1537-2197
pISSN - 0002-9122
DOI - 10.1002/j.1537-2197.1960.tb10618.x
Subject(s) - auxin , pisum , epicotyl , biology , sativum , botany , phototropism , apex (geometry) , seedling , biochemistry , gene , physics , optics , blue light
S cott , T om K., and W inslow R. B riggs . (Stanford U., Stanford, Calif.) Auxin relationships in the Alaska pea (Pisum sativum). Amer. Jour. Bot. 47(6) : 492–499. Illus. 1960.—The distribution of “free” auxin in the 9‐day‐old ‘Alaska’ pea epicotyl was determined by short‐term ether extraction and by the standard agar diffusion technique. The apical bud appeared to be the only source of “free” auxin. In the upper (growing) internode “free” auxin as determined by diffusion was found to decrease significantly from apex to base, while “free” auxin as determined by extraction remained constant. Below this region, both diffusible and extractable auxin remain constant through one internode and then both decrease simultaneously to the base of the plant. In the growing region, a fraction of diffusible auxin must move from the transport system but remain readily extractable. Upon removal of the apical auxin source all “free” auxin will ultimately be found in the transport system from which it gradually disappears basally.