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The timing of growth promotion and conversion to indole-3-acetic acid for auxin precursors.
Plant Physiol. 1970 Mar; 45(3):240-3.PP

Abstract

Using a high resolution continuous recording technique, the length of the latent period preceding the growth response to two suspected precursors of indole-3-acetic acid (IAA) indole-3-acetonitrile (IAN), and indole-3-ethanol was studied in corn (Zea mays L.), wheat (Triticum aestivum L.), and peas (Pisum sativum L.). The timing of the conversion in vivo of these presumed precursors to IAA was also examined. In wheat the rate of conversion of IAN to IAA is rapid, and the latent period in the growth response to IAN is correspondingly short. In corn the rate of conversion in vivo of IAN to IAA is slow, and there is a long latent period in the growth response. In peas there is no conversion of IAN to IAA, and there is no measurable growth response to IAN. These data indicate that IAN is active in promoting growth only after conversion to IAA. This conclusion is strengthened by transport studies. Using a similar approach, we have also obtained data indicating that indole-3-ethanol is active only after conversion to IAA.

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Authors

Evans ML
No affiliation info available
Rayle DL
No affiliation info available

MeSH

EthanolIndoleacetic AcidsIndolesNitrilesPlants, EdibleSeedsTriticumZea mays

Pub Type(s)

Journal Article

Language

eng

PubMed ID

5423464

Citation

Evans, M L., and D L. Rayle. "The Timing of Growth Promotion and Conversion to Indole-3-acetic Acid for Auxin Precursors." Plant Physiology, vol. 45, no. 3, 1970, pp. 240-3.
Evans ML, Rayle DL. The timing of growth promotion and conversion to indole-3-acetic acid for auxin precursors. Plant Physiol. 1970;45(3):240-3.
Evans, M. L., & Rayle, D. L. (1970). The timing of growth promotion and conversion to indole-3-acetic acid for auxin precursors. Plant Physiology, 45(3), 240-3.
Evans ML, Rayle DL. The Timing of Growth Promotion and Conversion to Indole-3-acetic Acid for Auxin Precursors. Plant Physiol. 1970;45(3):240-3. PubMed PMID: 5423464.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - The timing of growth promotion and conversion to indole-3-acetic acid for auxin precursors. AU - Evans,M L, AU - Rayle,D L, PY - 1970/3/1/pubmed PY - 1970/3/1/medline PY - 1970/3/1/entrez SP - 240 EP - 3 JF - Plant physiology JO - Plant Physiol VL - 45 IS - 3 N2 - Using a high resolution continuous recording technique, the length of the latent period preceding the growth response to two suspected precursors of indole-3-acetic acid (IAA) indole-3-acetonitrile (IAN), and indole-3-ethanol was studied in corn (Zea mays L.), wheat (Triticum aestivum L.), and peas (Pisum sativum L.). The timing of the conversion in vivo of these presumed precursors to IAA was also examined. In wheat the rate of conversion of IAN to IAA is rapid, and the latent period in the growth response to IAN is correspondingly short. In corn the rate of conversion in vivo of IAN to IAA is slow, and there is a long latent period in the growth response. In peas there is no conversion of IAN to IAA, and there is no measurable growth response to IAN. These data indicate that IAN is active in promoting growth only after conversion to IAA. This conclusion is strengthened by transport studies. Using a similar approach, we have also obtained data indicating that indole-3-ethanol is active only after conversion to IAA. SN - 0032-0889 UR - https://www.unboundmedicine.com/medline/citation/5423464/The_timing_of_growth_promotion_and_conversion_to_indole_3_acetic_acid_for_auxin_precursors_ DB - PRIME DP - Unbound Medicine ER -