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本文引用的文献

1
The developmental morphology and growth dynamics of the tobacco leaf.烟草叶片的发育形态和生长动态。
Planta. 1985 Aug;165(2):158-69. doi: 10.1007/BF00395038.
2
The isolation and characterization of gibberellin-deficient mutants in tomato.番茄赤霉素缺陷突变体的分离与鉴定。
Theor Appl Genet. 1990 Dec;80(6):852-7. doi: 10.1007/BF00224204.
3
Identification, quantitation and distribution of gibberellins in fruits of Pisum sativum L. cv. Alaska during pod development.豌豆 Alaska 品种豆荚发育过程中果实内赤霉素的鉴定、定量和分布
Planta. 1991 Apr;184(1):53-60. doi: 10.1007/BF00208236.
4
Mobile gibberellin directly stimulates Arabidopsis hypocotyl xylem expansion.赤霉素通过移动直接刺激拟南芥下胚轴木质部的扩张。
Plant Cell. 2011 Apr;23(4):1322-36. doi: 10.1105/tpc.111.084020. Epub 2011 Apr 15.
5
Analysis of secondary growth in the Arabidopsis shoot reveals a positive role of jasmonate signalling in cambium formation.分析拟南芥茎的次生生长揭示了茉莉酸信号在形成形成层中的积极作用。
Plant J. 2010 Sep;63(5):811-22. doi: 10.1111/j.1365-313X.2010.04283.x.
6
Enhancing plant growth and fiber production by silencing GA 2-oxidase.通过沉默 GA 2-氧化酶来提高植物生长和纤维产量。
Plant Biotechnol J. 2010 May 1;8(4):425-35. doi: 10.1111/j.1467-7652.2009.00480.x. Epub 2010 Jan 13.
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Stem cell function during plant vascular development.植物血管发育过程中的干细胞功能。
Semin Cell Dev Biol. 2009 Dec;20(9):1097-106. doi: 10.1016/j.semcdb.2009.09.009. Epub 2009 Sep 19.
8
The angiosperm gibberellin-GID1-DELLA growth regulatory mechanism: how an "inhibitor of an inhibitor" enables flexible response to fluctuating environments.被子植物赤霉素-GID1-DELLA生长调控机制：“抑制剂的抑制剂”如何实现对波动环境的灵活响应。
Plant Cell. 2009 May;21(5):1328-39. doi: 10.1105/tpc.109.066969. Epub 2009 May 26.
9
Ethylene is an endogenous stimulator of cell division in the cambial meristem of Populus.乙烯是杨树形成层分生组织中细胞分裂的内源性刺激物。
Proc Natl Acad Sci U S A. 2009 Apr 7;106(14):5984-9. doi: 10.1073/pnas.0811660106. Epub 2009 Mar 17.
10
Cytokinins are central regulators of cambial activity.细胞分裂素是形成层活动的核心调节因子。
Proc Natl Acad Sci U S A. 2008 Dec 16;105(50):20027-31. doi: 10.1073/pnas.0805619105. Epub 2008 Dec 11.

叶诱导的赤霉素信号对于烟草茎的节间伸长、形成层活动和纤维分化是必需的。

Leaf-induced gibberellin signaling is essential for internode elongation, cambial activity, and fiber differentiation in tobacco stems.

机构信息

Department of Molecular Biology and Ecology of Plants, Tel Aviv University, Tel Aviv 69978, Israel.

出版信息

Plant Cell. 2012 Jan;24(1):66-79. doi: 10.1105/tpc.111.093096. Epub 2012 Jan 17.

DOI:10.1105/tpc.111.093096
PMID:22253226
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC3289570/
Abstract

The gibberellins (GAs) are a group of endogenous compounds that promote the growth of most plant organs, including stem internodes. We show that in tobacco (Nicotiana tabacum) the presence of leaves is essential for the accumulation of bioactive GAs and their immediate precursors in the stem and consequently for normal stem elongation, cambial proliferation, and xylem fiber differentiation. These processes do not occur in the absence of maturing leaves but can be restored by application of C(19)-GAs, identifying the presence of leaves as a requirement for GA signaling in stems and revealing the fundamental role of GAs in secondary growth regulation. The use of reporter genes for GA activity and GA-directed DELLA protein degradation in Arabidopsis thaliana confirms the presence of a mobile signal from leaves to the stem that induces GA signaling.

摘要

赤霉素（GAs）是一组内源性化合物，可促进大多数植物器官的生长，包括茎节间。我们发现，在烟草（Nicotiana tabacum）中，叶片的存在对于茎中生物活性 GAs 及其直接前体的积累以及正常茎伸长、形成层增殖和木质部纤维分化是必不可少的。在没有成熟叶片的情况下，这些过程不会发生，但可以通过施加 C（19）-GAs 来恢复，这表明叶片的存在是茎中 GA 信号的要求，并揭示了 GAs 在次生生长调节中的基本作用。在拟南芥中，使用 GA 活性报告基因和 GA 定向 DELLA 蛋白降解的方法证实了从叶片到茎的移动信号的存在，该信号诱导 GA 信号。