Open AccessTranslocation and Metabolism of Endosperm-Applied [2-14C] Indoleacetic Acid in Etiolated Avena sativa L. Seedlings
Author(s) -
David L. Jackson,
James A. McWha
Publication year - 1983
Publication title -
plant physiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.554
H-Index - 312
eISSN - 1532-2548
pISSN - 0032-0889
DOI - 10.1104/pp.73.2.316
Subject(s) - endosperm , avena , etiolation , shoot , chromosomal translocation , metabolism , botany , biology , caryopsis , indole 3 acetic acid , chemistry , biochemistry , auxin , poaceae , enzyme , gene
The role of free indole-3-acetic acid (IAA) in the endosperm of Avena sativa L. seedlings was investigated to determine its contribution to free IAA in the shoot. [2-(14)C]IAA was injected into the endosperm of darkgrown seedlings and the transport and metabolism of the [(14)C]-labeled compounds determined. It was concluded that translocation of free IAA directly from the endosperm is probably not a significant source of free IAA in the shoot, mainly because even small amounts of [(14)C]IAA introduced into the endosperm were rapidly metabolized. This suggested that, in Avena, free IAA does not normally exist in the liquid endosperm.