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Hydrogen peroxide and other reactive oxygen species are important signaling molecules in diverse physiological processes. Previously, we discovered superoxide dismutase (SOD) activity in extracellular protein preparations from fiber-bearing cotton (Gossypium hirsutum L.) seeds. We show here, based on immunoreactivity, that the enzyme is a Cu/Zn-SOD (CSD). Immunogold localization shows that CSD localizes...
Summary. Arabinogalactan proteins (AGPs) are abundant complex macromolecules involved in both reproductive and vegetative plant growth. They are secreted at pollen tube tips in Lilium longiflorum. Here, we report the effect of the (-D-glucosyl)3 Yariv phenylglycoside, known to interact with AGPs, on pollen tube extension in several plant species. In Annona cherimola the Yariv reagent clearly inhibited...
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