Transport and Metabolism of the Endogenous Auxin Precursor Indole-3-Butyric Acid
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چکیده
منابع مشابه
The rib1 mutant is resistant to indole-3-butyric acid, an endogenous auxin in Arabidopsis.
The presence of indole-3-butyric acid (IBA) as an endogenous auxin in Arabidopsis has been recently demonstrated. However, the in vivo role of IBA remains to be elucidated. We present the characterization of a semi-dominant mutant that is affected in its response to IBA, but shows a wild-type response to indole-3-acetic acid (IAA), the predominant and most studied form of auxin. We have named t...
متن کاملArabidopsis PIS1 encodes the ABCG37 transporter of auxinic compounds including the auxin precursor indole-3-butyric acid.
Differential distribution of the plant hormone auxin within tissues mediates a variety of developmental processes. Cellular auxin levels are determined by metabolic processes including synthesis, degradation, and (de)conjugation, as well as by auxin transport across the plasma membrane. Whereas transport of free auxins such as naturally occurring indole-3-acetic acid (IAA) is well characterized...
متن کاملIndole-3-butyric acid in plants : occurrence, synthesis, metabolism and transport
Indole-3-butyric acid (IBA) was recently identified by GC/MS analysis as an endogenous constituent of various plants . Plant tissues contained 9 ng g fresh weight of free IBA and 37 ng g-' fresh weight of total IBA, compared to 26 ng g-' and 52 ng g-' fresh weight of free and total indole-3-acetic acid (IAA), respectively . IBA level was found to increase during plant development, but never rea...
متن کاملThe Arabidopsis PLEIOTROPIC DRUG RESISTANCE8/ABCG36 ATP binding cassette transporter modulates sensitivity to the auxin precursor indole-3-butyric acid.
Plants have developed numerous mechanisms to store hormones in inactive but readily available states, enabling rapid responses to environmental changes. The phytohormone auxin has a number of storage precursors, including indole-3-butyric acid (IBA), which is apparently shortened to active indole-3-acetic acid (IAA) in peroxisomes by a process similar to fatty acid beta-oxidation. Whereas metab...
متن کاملTransport of the two natural auxins, indole-3-butyric acid and indole-3-acetic acid, in Arabidopsis.
Polar transport of the natural auxin indole-3-acetic acid (IAA) is important in a number of plant developmental processes. However, few studies have investigated the polar transport of other endogenous auxins, such as indole-3-butyric acid (IBA), in Arabidopsis. This study details the similarities and differences between IBA and IAA transport in several tissues of Arabidopsis. In the infloresce...
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ژورنال
عنوان ژورنال: Molecular Plant
سال: 2011
ISSN: 1674-2052
DOI: 10.1093/mp/ssr006