La croissance des v égétaux - sorbonne-universitefr

have been prepared and evaluated for auxin activity in two types of assay In standard elongation tests with pea (Pisum sativum L ) epicotyl sections the conjugates are inactive However, if the epicotyls are abraded to perforate the cuticle, auxin activity is observed provided that the conjugates are not too large to traverse the cell wall

Selective lnhibition of Activity and Elongation Growth of

Auxin-lnduced Growth lnhibited by Thiol Reactive Reagents The rate of elongation growth of the soybean liypocotyl segments was approximately doubled by 10 PM 2,4-D As with the auxin-induced component of NADH oxidase ac- tivity, growth induced by 10 PM 2,4-D (0 8 cm) was inhib- ited preferentially to the constitutive leve1 (0 4 crn) by both

Auxin and Light Control of Adventitious Rooting in

(IAA) and IAA conjugates was shown This was correlated with a downregulation of the expression of several auxin-inducible GH3 genes in the hypocotyl of the ago1-3 mutant We also found that the Auxin Response Factor17 (ARF17) gene, a potential repressor of auxin-inducible genes, was overexpressed in ago1-3 hypocotyls The characterization of

Ultrastructural changes in sunflower root cells in relation

exogenous auxin were studied on the ultrastructural level Although gross morphological effects such as inhibition of root elongation and a change in the direction of cell expansion from longitudinal to radial are similar in both auxin-treated and boron-deficient seedling roots, ultra-

superroot, a Recessive Mutation in Arabidopsis, Confers Auxin

mutants resistant to growth-inhibiting concentrations of auxin have been isolated (for a review, see Hobbie and Estelle, 1994) In addition to being resistant to auxin, several of these mu- tants, namely, the altered-auxin response (axrl and axr2) the auxin-resisfant (auxl) mutants, have been shown to be resis-

Auxin and Light Control of Adventitious Rooting in

Auxin and Light Control of Adventitious Rooting in Arabidopsis a Laboratoire de Biologie Cellulaire, hypocotyl is speciﬁcally resistant to auxin-mediated elongation

Molecular basis for AUXIN RESPONSE FACTOR protein interaction

Molecular basis for AUXIN RESPONSE FACTOR protein interaction and the control of auxin response repression David A Korasick a, Corey S Westfall , Soon Goo Leea, Max H Nanaob,c, Renaud Dumasd