Growth-limiting proteins in maize coleoptiles and the auxin-brassinosteroid hypothesis of mesocotyl elongation.
Growth-limiting proteins in maize coleoptiles and the auxin-brassinosteroid hypothesis of mesocotyl elongation.
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DOI：
10.1007/s00709-015-0787-4
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发表时间：
2016-01
期刊：
影响因子：
2.9
通讯作者：
Wang ZY
中科院分区：
文献类型：
--
作者：
Kutschera U;Wang ZY
禾本科植物胚芽鞘的芽由中胚轴、节和胚芽鞘（有封闭的初生叶）组成。自20世纪30年代以来，人们知道，生长素（吲哚-3-乙酸，IAA），产生于胚芽鞘的尖端，是中央调节器的turgor-driven器官生长。50年前，人们发现抑制蛋白质生物合成的抗生素，如放线菌酮，在胚芽鞘和茎的离体切片中抑制生长素（IAA）诱导的细胞伸长。基于这种抑制剂的研究，出现了“生长限制蛋白（GLP）”的概念，随后进行了详细阐述和修改。在这里，我们总结了这一想法的历史，参考IAA介导的芽伸长在玉米（玉米）幼苗，和最近的研究在拟南芥生长素作用的分子机制。此外，还讨论了光诱导抑制完整玉米幼苗芽伸长的分析。我们提出了一个概念来解释GLP介导的胚芽鞘段的表皮壁松弛过程，并提出了一个更一般的完整玉米幼苗生长调节模型。定量蛋白质组学和基因组学研究导致经典“GLP概念”的改进，以在分子水平上解释植物生长素介导的细胞伸长（即，最近提出的“中央生长调节网络”理论。新的数据表明，中胚轴的伸长不仅取决于生长素，但也对油菜素类固醇（BR）。然而，调节IAA/BR介导的扩张限制表皮壁松弛的生化关键过程尚未阐明。
The shoot of grass coleoptiles consists of the mesocotyl, the node, and the coleoptile (with enclosed primary leaf). Since the 1930s, it is known that auxin (Indole-3-acetic acid, IAA), produced in the tip of the coleoptile, is the central regulator of turgor-driven organ growth. Fifty years ago, it was discovered that antibiotics that suppress protein biosynthesis, such as cycloheximide, inhibit auxin (IAA)-induced cell elongation in excised sections of coleoptiles and stems. Based on such inhibitor studies, the concept of “growth-limiting proteins (GLPs)” emerged that was subsequently elaborated and modified. Here we summarize the history of this idea with reference to IAA-mediated shoot elongation in maize (Zea mays) seedlings, and recent studies on the molecular mechanism underlying auxin action in Arabidopsis thaliana. In addition, the analysis of light-induced inhibition of shoot elongation in intact corn seedlings is discussed. We propose a concept to account for the GLP-mediated epidermal wall-loosening process in coleoptile segments, and present a more general model of growth regulation in intact maize seedlings. Quantitative proteomic and genomic studies led to a refinement of the classic “GLP-concept” to explain phytohormone-mediated cell elongation at the molecular level (i.e., the recently proposed theory of a ‘Central Growth Regulation Network’, CGRN). Novel data show that mesocotyl elongation not only depends on auxin, but also on brassinosteroids (BRs). However, the biochemical key processes that regulate the IAA/BRs-mediated loosening of the expansion-limiting epidermal wall(s) have not yet been elucidated.
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影响因子：
7.4
作者：
Cona, A;Cenci, F;Angelini, R
通讯作者：
Angelini, R
DOI：
10.1111/j.1438-8677.1988.tb00012.x
发表时间：
1988-02-01
期刊：
BOTANICA ACTA
影响因子：
--
作者：
BERGFELD, R;SPETH, V;SCHOPFER, P
通讯作者：
SCHOPFER, P
影响因子：
4.4
作者：
Deng, Zhiping;Oses-Prieto, Juan A.;Kutschera, Ulrich;Tseng, Tong-Seung;Hao, Lingzhao;Burlingame, Alma L.;Wang, Zhi-Yong;Briggs, Winslow R.
通讯作者：
Briggs, Winslow R.
影响因子：
21.3
作者：
通讯作者：
--
影响因子：
5.1
作者：
Becker, D;Hedrich, R
通讯作者：
Hedrich, R