indole 3 acetic acid/hypoxia

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Anoxia promotes gravitropic curvature in rice pulvini but inhibits it in wheat and oat pulvini.

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Gravitropic curvature of pulvini of wheat and oat stem segments gradually declined with decreasing atmospheric O₂ concentration and was almost completely blocked under anoxia, whereas that of rice stem segments was enhanced under hypoxia and anoxia. Anoxia substantially increased the ethanol content

Novel chimeric gene promoters responsive to hypoxia and ionizing radiation.

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Despite being an adverse prognostic factor in radiotherapy, hypoxia represents a physiological difference that can be exploited for selective cancer gene therapy. In this study gene therapy vectors responsive to both hypoxia and ionizing radiation (IR) were developed. Gene expression was regulated

The auxin-inducible GH3 homologue Pp-GH3.16 is downregulated in Pinus pinaster root systems on ectomycorrhizal symbiosis establishment.

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In an attempt to determine whether auxin-regulated plant genes play a role in ectomycorrhizal symbiosis establishment, we screened a Pinus pinaster root cDNA library for auxin-upregulated genes. This allowed the identification of a cDNA, Pp-GH3.16, which encodes a polypeptide sharing extensive

THE EFFECT OF AUXINS ON PROTOPLASMIC STREAMING. II.

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1. A further study has been made of the effect of indole-3-acetic acid (auxin) on protoplasmic streaming in the epidermal cells of the Avena coleoptile. 2. The transient nature of the effect of auxin, both in accelerating and retarding streaming, is due to the temporary exhaustion of carbohydrate

Mutualistic fungus Phomopsis liquidambari increases root aerenchyma formation through auxin-mediated ethylene accumulation in rice (Oryza sativa L.).

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The fungal endophyte Phomopsis liquidambari can improve nitrification rates and alter the abundance and composition of ammonia-oxidizers in the soil rhizosphere of rice. Aerenchyma is related to oxygen transport efficiency and contributes to the enhanced rhizospheric nitrification under flooding

Membrane-associated binding sites for indoleacetic acid in the rice coleoptile.

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As described previously, the sensitivity of rice (Oryza sativa L.) coleoptiles to auxin is modulated by oxygen. Under anoxia, coleoptile elongation is insensitive to exogenously applied indole-3-acetic acid (IAA), whereas its sensitivity increases in air in the presence of the exogenous stimulus.

A Role for Auxin in Ethylene-Dependent Inducible Aerenchyma Formation in Rice Roots.

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Internal oxygen diffusion from shoot to root tips is enhanced by the formation of aerenchyma (gas space) in waterlogged soils. Lysigenous aerenchyma is created by programmed cell death and subsequent lysis of the root cortical cells. Rice (Oryza sativa) forms aerenchyma constitutively under

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