INDOLEACETIC-ACID PRETREATMENT OF TOBACCO PLANTS IN-VIVO INCREASES THE IN-VITRO SENSITIVITY TO AUXIN OF THE PLASMA-MEMBRANE H-ATPASE FROM LEAVES AND MODIFIES THE POLYPEPTIDE COMPOSITION OF THE MEMBRANE()

Authors
SANTONI V VANSUYT G ROSSIGNOL M
Citation
V. Santoni et al., INDOLEACETIC-ACID PRETREATMENT OF TOBACCO PLANTS IN-VIVO INCREASES THE IN-VITRO SENSITIVITY TO AUXIN OF THE PLASMA-MEMBRANE H-ATPASE FROM LEAVES AND MODIFIES THE POLYPEPTIDE COMPOSITION OF THE MEMBRANE(), FEBS letters, 326(1-3), 1993, pp. 17-20
Citations number
15
Categorie Soggetti
Biophysics,Biology
Journal title
FEBS letters → ACNP
ISSN journal
00145793
Volume
326
Issue
1-3
Year of publication
1993
Pages
17 - 20
Database
ISI
SICI code
0014-5793(1993)326:1-3<17:IPOTPI>2.0.ZU;2-O
Abstract
The sensitivity to auxin of the H+-ATPase-mediated proton translocatio n was investigated in vitro using purified plasma membrane vesicles fr om tobacco leaves. In vivo pretreatment of tobacco plants with auxin p romotes a 100-fold increase of the in vitro sensitivity to auxin. This effect is specific for biologically active auxins and is dose- and ti me-dependent. In addition, pretreatment with auxin induces the accumul ation of several polypeptides in the plasma membrane. These polypeptid es constitute the first set of hormone-responsive polypeptides evidenc ed in plant membranes.