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Cytoskeletal Drugs and Gravity‐Induced Lateral Auxin Transport in Rice Coleoptiles
Author(s) -
Godbolé R.,
Michalke W.,
Nick P.,
Hertel R.
Publication year - 2000
Publication title -
plant biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.871
H-Index - 87
eISSN - 1438-8677
pISSN - 1435-8603
DOI - 10.1055/s-2000-9154
Subject(s) - auxin , gravitropism , coleoptile , amyloplast , cytoskeleton , biology , microtubule , oryza sativa , phototropism , microbiology and biotechnology , botany , biophysics , biochemistry , plastid , cell , materials science , chloroplast , arabidopsis , gene , mutant , blue light , optoelectronics
Gravity‐induced events such as amyloplast sedimentation and lateral auxin transport were probed with cytoskeletal drugs in coleoptiles of rice ( Oryza sativa L.). Amyloplast sedimentation was retarded by taxol. Lateral transport of auxin ( 3 H‐indoleacetic acid) was strongly inhibited by EPC (ethyl N‐phenylcarbamate), but only partially inhibited by taxol. 1 mM EPC reduced gravitropism while phototropism was not affected. The findings suggest that microtubules may transduce pressure or proximity of amyloplasts to the auxin exporter in the plasmalemma.