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Perception of gravity expressed by vascular differentiation
Author(s) -
GERSANI M.,
SACHS T.
Publication year - 1990
Publication title -
plant, cell and environment
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.646
H-Index - 200
eISSN - 1365-3040
pISSN - 0140-7791
DOI - 10.1111/j.1365-3040.1990.tb01328.x
Subject(s) - auxin , polarity (international relations) , microbiology and biotechnology , botany , biology , cellular differentiation , chemistry , anatomy , cell , biochemistry , gene
Abstract. The differentiation of new vessels was induced by local applications of auxin to isolated pieces of turnip storage roots. This differentiation was compared in varied relative orientations of the location of auxin application, the shoot‐root polarity and the direction of gravity. Vessel differentiation was restricted to the cambial region and its course was determined primarily by the location of auxin application and the original, determined polarity of the tissues. Within this framework, the course of vessel differentiation was significantly modified by gravity: individual vessels tended to curve downwards and to be concentrated on the lower half of the tissue. The results can be understood as an observable expression of an influence of gravity on auxin transport.