Basipetally polarised transport of [3H]gibberellin A1 and [14C]gibberellin A3, and acropetal polarity of [14C]indole-3-acetic acid transport, in stelar tissues of Phaseolus coccineus roots

Planta ◽  
1974 ◽  
Vol 118 (4) ◽  
pp. 311-322 ◽  
Author(s):  
W. Hartung ◽  
I. D. J. Phillips
Keyword(s):  
Acetic Acid ◽  
Phaseolus Coccineus ◽  
Acid Transport ◽  
Gibberellin A3 ◽  
Gibberellin A1 ◽  
Indole 3 Acetic Acid

scholarly journals Inhibition of Polar Indole-3-acetic Acid Transport by Cycloheximide

1979 ◽  
Vol 63 (6) ◽  
pp. 1217-1219 ◽  
Author(s):  
Joseph Riov ◽  
Raphael Goren
Keyword(s):  
Acetic Acid ◽  
Acid Transport ◽  
Indole 3 Acetic Acid

Stimulation of adventitious rooting in sunflower (Helianthus annuus) by low pH: possible role of auxin

1993 ◽  
Vol 71 (12) ◽  
pp. 1645-1650 ◽  
Author(s):  
Jin-Hao Liu ◽  
Ilabanta Mukherjee ◽  
David M. Reid
Keyword(s):  
Acetic Acid ◽  
Helianthus Annuus ◽  
Shoot Apex ◽  
Adventitious Root ◽  
Root Formation ◽  
Adventitious Root Formation ◽  
Low Ph ◽  
Acid Transport ◽  
Acidic Conditions ◽  
Indole 3 Acetic Acid

Adventitious root formation by the hypocotyl cuttings of sunflower seedlings was greatly affected by the pH of buffered and unbuffered solutions bathing their basal portion. Exposure to low pH for 5 h after original root excision promoted root formation. Reduction of endogenous indole-3-acetic acid movement from the cotyledons and shoot apex was achieved by using N-1-naphthylphthalamic acid (an inhibitor of indole-3-acetic acid transport) and by removal of the cotyledons and shoot apex. Both the inhibitor and organ removal inhibited adventitious root formation, but acidic conditions could, to varying degrees, overcome this inhibition. Acidic conditions also increased the rate of [3H]indole-3-acetic acid uptake from the solutions around the hypocotyl bases and the rate of [3H]indole-3-acetic acid movement from cotyledons to the hypocotyl bases. Thus, acidic conditions may stimulate rooting by increasing the rate of basipetal indole-3-acetic acid transport to the zone of root initiation. These experiments show that in studies of the effects of various substances on rooting, the experimenter must be aware of these pH effects and take appropriate precautions. Key words: adventitious roots, auxin, indole-3-acetic acid, Helianthus annuus, pH.

Cytokinin-induced hypocotyl elongation in light-grown Arabidopsis plants with inhibited ethylene action or indole-3-acetic acid transport

Planta ◽  
2004 ◽  
Vol 221 (1) ◽  
pp. 39-47 ◽  
Author(s):  
Rafaël Smets ◽  
Jie Le ◽  
Els Prinsen ◽  
Jean-Pierre Verbelen ◽  
Henri A. Van Onckelen
Keyword(s):  
Acetic Acid ◽  
Hypocotyl Elongation ◽  
Acid Transport ◽  
Ethylene Action ◽  
Indole 3 Acetic Acid

Variation in indole-3-acetic acid transport and its relationship with growth in etiolated lupin hypocotyls

2007 ◽  
Vol 164 (7) ◽  
pp. 851-860 ◽  
Author(s):  
Juana Inés López Nicolás ◽  
Manuel Acosta ◽  
José Sánchez-Bravo
Keyword(s):  
Acetic Acid ◽  
Acid Transport ◽  
Indole 3 Acetic Acid

Endogenous auxins and embryogenesis in Phaseolus coccineus

2001 ◽  
Vol 28 (1) ◽  
pp. 73 ◽  
Author(s):  
Piero Picciarelli ◽  
Nello Ceccarelli ◽  
Fabio Paolicchi ◽  
Gianni Calistri
Keyword(s):  
Acetic Acid ◽  
Developmental Stages ◽  
Phaseolus Coccineus ◽  
Single Seed ◽  
Seed Growth ◽  
Total Pool ◽  
Two Stages ◽  
Indole 3 Acetic Acid ◽  
Different Parts ◽  
Cotyledonary Stage

The occurrence and the dynamics of free and bound indole-3-acetic acid (IAA) in different parts of Phaseolus coccineus L. seeds were investigated at various developmental stages. Results show that free and bound IAA content in the single seed parts is quite different, and changes with different patterns during seed growth. The highest concentration of total IAA was found in early-heart stage embryos, while the total IAA concentration in the suspensor at early-heart stage is much lower than in the embryos, and remains almost constant in the later stages. Integuments have an intermediate content at the first two developmental stages, while showing the highest concentration of total IAA at the cotyledonary stage. Concerning the percentage of free IAA in relation to the total pool, we found that in the embryos free IAA accounts for 26–28% in the first two stages then increases up to 44% at the cotyledonary stage. In suspensors, the percentage of free IAA is much higher (90%) in all developmental stages. We discuss the idea that the different level of auxin between embryos and the suspensor might play an important role in the establishment of embryo polarity.

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