A global regulation inducing the shape of growing folded leaves.
A global regulation inducing the shape of growing folded leaves.
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DOI：
10.1371/journal.pone.0007968
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发表时间：
2009-11-23
期刊：
影响因子：
3.7
通讯作者：
Douady S
中科院分区：
文献类型：
--
作者：
Couturier E;Courrech du Pont S;Douady S
形状是在生物体中观察到的结构的重要特征之一。生物学家提出了在分子水平上控制形状的模型，而物理学家则在图灵和达西·汤姆森之后发展了模式自发产生的理论。在这里，我们建议，体积约束限制可能的形状的叶子。关注掌状叶（有裂片），主要观察结果是发育中的叶首先在芽内折叠生长，受到前叶和后叶的限制。我们表明，叶周长结束在这个小体积的边界。这导致了折叠方式和树叶最终展开形状之间的直接关系。这些依赖关系可以近似为简单的几何关系，我们确认折叠的胚胎和展开的成熟叶片。我们发现，独立的系统发育树中的位置，这些关系的折叠物种，但不工作的非折叠物种。这种对叶片生长的全局调节可能来自机械空间约束。这种空间调控应该是更普遍的，并被认为是一种新的简单的全球调控手段。
Shape is one of the important characteristics for the structures observed in living organisms. Whereas biologists have proposed models where the shape is controlled on a molecular level, physicists, following Turing and d'Arcy Thomson, have developed theories where patterns arise spontaneously. Here, we propose that volume constraints restrict the possible shapes of leaves. Focusing on palmate leaves (with lobes), the central observation is that developing leaves first grow folded inside a bud, limited by the previous and subsequent leaves. We show that the lobe perimeters end at the border of this small volume. This induces a direct relationship between the way it was folded and the final unfolded shape of the leaf. These dependencies can be approximated as simple geometrical relationships that we confirm on both folded embryonic and unfolded mature leaves. We find that independent of their position in the phylogenetic tree, these relationships work for folded species, but do not work for non-folded species. This global regulation for the leaf growth could come from a mechanical steric constraint. Such steric regulation should be more general and considered as a new simple means of global regulation.
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影响因子：
2.4
作者：
Gunawardena, AHLAN;Dengler, NG
通讯作者：
Dengler, NG
DOI：
10.1098/rspb.1998.0276
发表时间：
1998-01-22
影响因子：
4.7
作者：
Kobayashi, H;Kresling, B;Vincent, JFV
通讯作者：
Vincent, JFV
DOI：
10.1111/j.1095-8339.1969.tb01952.x
发表时间：
1969-01-01
影响因子：
2.4
作者：
MELVILLE R;WRIGLEY F A
通讯作者：
WRIGLEY F A
DOI：
10.1098/rstb.1952.0012
发表时间：
1952-01-01
期刊：
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY OF LONDON SERIES B-BIOLOGICAL SCIENCES
影响因子：
--
作者：
TURING, AM
通讯作者：
TURING, AM
影响因子：
56.9
作者：
Bharathan, G;Goliber, TE;Sinha, NR
通讯作者：
Sinha, NR