Transport and metabolism of the endogenous auxin precursor indole-3-butyric acid.
Transport and metabolism of the endogenous auxin precursor indole-3-butyric acid.
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DOI：
10.1093/mp/ssr006
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发表时间：
2011-05
期刊：
影响因子：
27.5
通讯作者：
L. Strader;B. Bartel
中科院分区：
文献类型：
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作者：
L. Strader;B. Bartel
植物的生长和形态发生取决于植物激素生长素的水平和分布。植物通过合成、失活和运输来严格调节细胞内活性生长素吲哚-3-乙酸(IAA)的水平。尽管将IAA运入和运出细胞的转运体已经被很好地描述，并且在发育过程中起着重要的作用，但对IAA前体的转运体知之甚少。在这篇综述中，我们讨论了越来越多的证据表明，IAA前体吲哚-3-丁酸(IBA)的转运独立于IAA特有的运输机制，以及最近发现的IBA外排载体和代谢IBA的酶。这些研究揭示了IBA在维持IAA水平和IAA在植物中的分布以支持正常发育方面的重要作用。
Plant growth and morphogenesis depend on the levels and distribution of the plant hormone auxin. Plants tightly regulate cellular levels of the active auxin indole-3-acetic acid (IAA) through synthesis, inactivation, and transport. Although the transporters that move IAA into and out of cells are well characterized and play important roles in development, little is known about the transport of IAA precursors. In this review, we discuss the accumulating evidence suggesting that the IAA precursor indole-3-butyric acid (IBA) is transported independently of the characterized IAA transport machinery along with the recent identification of specific IBA efflux carriers and enzymes suggested to metabolize IBA. These studies have revealed important roles for IBA in maintaining IAA levels and distribution within the plant to support normal development.