scholarly journals The Polar Auxin Transport Inhibitor N-1-Naphthylphthalamic Acid Disrupts Leaf Initiation, KNOX Protein Regulation, and Formation of Leaf Margins in Maize

2003 ◽  
Vol 133 (2) ◽  
pp. 597-605 ◽  
Author(s):  
Michael J. Scanlon
Keyword(s):  
Auxin Transport ◽  
Polar Auxin Transport ◽  
Protein Regulation ◽  
Leaf Initiation ◽  
Transport Inhibitor ◽  
Auxin Transport Inhibitor ◽  
Naphthylphthalamic Acid

scholarly journals The role of specific plant organs and polar auxin transport in correlative inhibition of leafy spurge (Euphorbia esula) root buds

1998 ◽  
Vol 76 (7) ◽  
pp. 1227-1231 ◽  
Author(s):  
David P Horvath
Keyword(s):  
Apical Dominance ◽  
Auxin Transport ◽  
Leafy Spurge ◽  
Polar Auxin Transport ◽  
Euphorbia Esula ◽  
Transport Inhibitor ◽  
Correlative Inhibition ◽  
Auxin Transport Inhibitor ◽  
Bud Growth ◽  
Root Buds

Localization of the source of the signal(s) controlling correlative inhibition of leafy spurge root buds (underground adventitious shoot buds located on the lateral roots) was studied by sequential removal of various plant organs. It was determined that full correlative inhibition of root buds was lost only after excision of all aerial tissue from the plant, or after excision of all aerial tissue except the stem. If mature leaves or growing axillary buds (or both) were left intact, no growth of root buds was observed. The synthetic auxin, alpha-NAA, prevented release of apical dominance and subsequent outgrowth of stem and crown buds when applied to the cut end of the stem or crown. Exogenous application of NAA to either the stem or the crown had little effect on root bud growth. Application of the auxin transport inhibitor NPA around the base of the crown had no effect on root bud quiescence. These data are not consistent with the previous studies (Weed Sci. 35: 155-159 (1987)) that indicate a role for auxin in maintenance of correlative inhibition of root bud growth in leafy spurge. The results of auxin transport inhibitor studies presented here suggest that correlative inhibition of root bud growth does not rely on the classic polar auxin transport system.Nomenclature: leafy spurge, Euphorbia esula L. #3 EPHES; NAA, naphthalene acetic acid; NPA, N-1-naphthylphthalamic acid; TIBA, 2,3,5-triiodobenzoic acid.Key words: root buds, apical dominance, auxin, NPA.

scholarly journals Artabolide, a novel polar auxin transport inhibitor isolated from Artemisia absinthium

Tetrahedron ◽  
2013 ◽  
Vol 69 (34) ◽  
pp. 7001-7005 ◽  
Author(s):  
Tsukasa Arai ◽  
Yuta Toda ◽  
Kiyotaka Kato ◽  
Kensuke Miyamoto ◽  
Tsuyoshi Hasegawa ◽  
...  
Keyword(s):  
Auxin Transport ◽  
Polar Auxin Transport ◽  
Artemisia Absinthium ◽  
Transport Inhibitor ◽  
Auxin Transport Inhibitor

Auxin and ETTIN in Arabidopsis gynoecium morphogenesis

Development ◽  
2000 ◽  
Vol 127 (18) ◽  
pp. 3877-3888 ◽  
Author(s):  
J.L. Nemhauser ◽  
L.J. Feldman ◽  
P.C. Zambryski
Keyword(s):  
Auxin Transport ◽  
Floral Organ ◽  
Polar Auxin Transport ◽  
Auxin Response ◽  
Auxin Transport Inhibitor ◽  
Increased Sensitivity ◽  
Auxin Flux ◽  
Naphthylphthalamic Acid

The phytohormone auxin has wide-ranging effects on growth and development. Genetic and physiological approaches implicate auxin flux in determination of floral organ number and patterning. This study uses a novel technique of transiently applying a polar auxin transport inhibitor, N-1-naphthylphthalamic acid (NPA), to developing Arabidopsis flowers to further characterize the role of auxin in organogenesis. NPA has marked effects on floral organ number as well as on regional specification in wild-type gynoecia, as defined by morphological and histological landmarks for regional boundaries, as well as tissue-specific reporter lines. NPA's effects on gynoecium patterning mimic the phenotype of mutations in ETTIN, a member of the auxin response factor family of transcription factors. In addition, application of different concentrations of NPA reveal an increased sensitivity of weak ettin alleles to disruptions in polar auxin transport. In contrast, the defects found in spatula gynoecia are partially rescued by treatment with NPA. A model is proposed suggesting an apical-basal gradient of auxin during gynoecium development. This model provides a mechanism linking ETTIN's putative transcriptional regulation of auxin-responsive genes to the establishment or elaboration of tissue patterning during gynoecial development.

The polar auxin transport inhibitor TIBA inhibits endoreduplication in dark grown spinach hypocotyls

Plant Science ◽  
2014 ◽  
Vol 225 ◽  
pp. 45-51 ◽  
Author(s):  
Makoto Amijima ◽  
Yuji Iwata ◽  
Nozomu Koizumi ◽  
Kei-ichiro Mishiba
Keyword(s):  
Auxin Transport ◽  
Polar Auxin Transport ◽  
Transport Inhibitor ◽  
Auxin Transport Inhibitor

Reduced Naphthylphthalamic Acid Binding in the tir3 Mutant of Arabidopsis Is Associated with a Reduction in Polar Auxin Transport and Diverse Morphological Defects

1997 ◽  
Vol 9 (5) ◽  
pp. 745 ◽  
Author(s):  
Max Ruegger ◽  
Elizabeth Dewey ◽  
Lawrence Hobbie ◽  
Dana Brown ◽  
Paul Bernasconi ◽  
...  
Keyword(s):  
Auxin Transport ◽  
Polar Auxin Transport ◽  
Morphological Defects ◽  
Naphthylphthalamic Acid
Sign in / Sign up

Export Citation Format

Share Document