A chemical pollen suppressant inhibits auxin-induced growth in maize coleoptile sections

Conference · Tue May 01 04:00:00 EDT 1990 · Plant Physiology, Supplement; (USA)

OSTI ID:5840893

Vesper, M J ^[1]; Cross, J W ^[2]

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1. Univ. of Dayton, OH (USA)
2. Sogetal, Inc., Hayward, CA (USA)

Chemical inhibitors of pollen development having a phenylcinnoline carboxylate structure were found to inhibit IAA- and 1-NAA-induced growth in maize coleoptile sections. The inhibitor (100 {mu}M) used in these experiments caused approx. 35% reduction in auxin-induced growth over the auxin concentration range of 0.3 to 100 {mu}M. Growth inhibition was noted as a lengthening of the latent period and a decrease in the rate of an auxin-induced growth response. An acid growth response to pH 5 buffer in abraded sections was not impaired. The velocity of basipetal transport of ({sup 3}H)IAA through the coleoptile sections also was not inhibited by the compound, nor was uptake of ({sup 3}H)IAA. Similarly, the inhibitor does not appear to alter auxin-induced H{sup +} secretion. We suggest that the agent targets some other process necessary for auxin-dependent growth.

• OSTI ID: 5840893
• Report Number(s): CONF-9007196--
• Conference Information: Journal Name: Plant Physiology, Supplement; (USA) Journal Volume: 93:1
• Country of Publication: United States
• Language: English

Related Subjects

551001* -- Physiological Systems-- Tracer Techniques
59 BASIC BIOLOGICAL SCIENCES
AUXINS
CEREALS
COLEOPTILE
GRAMINEAE
GROWTH
HYDROGEN COMPOUNDS
INHIBITION
ISOTOPE APPLICATIONS
LILIOPSIDA
MAGNOLIOPHYTA
MAIZE
PLANT GROWTH
PLANT GROWTH REGULATORS
PLANTS
TRACER TECHNIQUES
TRITIUM COMPOUNDS