phenylacetic acid/zea mays

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Phenylacetic acid as a phytotoxic compound of corn pollen.

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Phenylacetic acid (PAA), one of the phytotoxic compounds in corn (Zea mays) pollen, was identified by GC-MS and by direct comparison with a pure commercial sample of PAA. Bioassays were carried out by testing whole pollen, methylene chloride extract of the pollen, and pure PAA on germination and

Auxin Biosynthesis: Are the Indole-3-Acetic Acid and Phenylacetic Acid Biosynthesis Pathways Mirror Images?

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The biosynthesis of the main auxin in plants (indole-3-acetic acid [IAA]) has been elucidated recently and is thought to involve the sequential conversion of Trp to indole-3-pyruvic acid to IAA However, the pathway leading to a less well studied auxin, phenylacetic acid (PAA), remains unclear. Here,

Auxin-binding protein from coleoptile membranes of corn (Zea mays L.). I. Purification by immunological methods and characterization.

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The purification of a putative auxin receptor is one possibility to elucidate the first event in the mechanism of auxin action. By affinity chromatography of membrane proteins on 2-OH-3,5-diiodobenzoic acid-Sepharose and gel filtration on Ultrogel a fraction enriched in auxin-binding protein (ABP)

First Report of Ear Soft Rot of Corn (Zea mays) Caused by Burkholderia gladioli in the United States.

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During the summer of 2005, an uncharacterized disease was observed on sweet corn 'Mirai 301BC' commercially grown in Sunflower County, Mississippi. Initial symptoms developing at the base of the ear on interior husk leaves were brown, water-soaked, irregular lesions. These gradually enlarged up to

Properties of auxin binding sites in different subcellular fractions from maize coleoptiles.

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In-vitro binding of labeled auxins to sedimentable particles was tested in subcellular fractions from homogenates of maize (Zea mays L.) coleoptiles. The material was fractionated by differential centrifugation or on sucrose density gradients. It was confirmed that the major saturable binding

Continuous measurement of initial curvature of maize coleoptiles induced by lateral auxin application.

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To analyze early effects of auxin application, an apparatus was developed which continuously and simultaneously registered the curvature of 10 individual maize (Zea mays L.) coleoptiles. Resolution was less than 5 μm over a range of ±0.5 mm. The data were evaluated and plotted via paper tape and

Specific inhibition of phototropism in corn seedlings.

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Geotropism was used as a control for the specificity of potential inhibitors of phototropism by the coleoptiles of corn (Zea mays) seedlings. The compounds tested fall into three categories showing: (a) no inhibition of either phototropism or geotropism (KCl); (b) nonspecific inhibition of both

Rapid Auxin-induced Decrease in Free Space pH and Its Relationship to Auxin-induced Growth in Maize and Pea.

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A pH microelectrode has been used to investigate the auxin effect on free space pH and its correlation with auxin-stimulated elongation in segments of pea (Pisum sativum) stem and maize (Zea mays var. Bear Hybrid) coleoptile tissue. Auxin induces a decrease in free space pH in both tissues. In maize

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