Hydro-responsive curling of the resurrection plant Selaginella lepidophylla.
Hydro-responsive curling of the resurrection plant Selaginella lepidophylla.
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DOI：
10.1038/srep08064
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发表时间：
2015-01-27
影响因子：
4.6
通讯作者：
Pasini D
中科院分区：
文献类型：
--
作者：
Rafsanjani A;Brulé V;Western TL;Pasini D
卷柏（Selaginella lepidophylla）是一种古老的复活植物，它的茎在脱水后紧密卷曲成巢球状。由于其螺旋状叶序，植物上较老的外茎交织并包裹形成植物中心的较年轻的内茎。茎卷曲是限制植物在干旱环境中可能经历的光抑制和热损害的形态学机制。在这里，我们研究了不同的构象变化的外部和内部茎的S。由脱水引起的鳞叶病外茎在相对较短的干燥时间内弯曲成圆环，而内茎由于沿其长度的液压驱动应变梯度沿着而缓慢卷曲成螺旋形。这种布置既便于在干燥期间对植物进行紧密包装，又便于在再水化时快速打开。从这项工作中获得的见解阐明了植物中的水响应运动，并可能有助于发展可展开结构，具有显着的形状变化，以响应环境刺激。
The spirally arranged stems of the spikemoss Selaginella lepidophylla, an ancient resurrection plant, compactly curl into a nest-ball shape upon dehydration. Due to its spiral phyllotaxy, older outer stems on the plant interlace and envelope the younger inner stems forming the plant centre. Stem curling is a morphological mechanism that limits photoinhibitory and thermal damages the plant might experience in arid environments. Here, we investigate the distinct conformational changes of outer and inner stems of S. lepidophylla triggered by dehydration. Outer stems bend into circular rings in a relatively short period of desiccation, whereas inner stems curl slowly into spirals due to hydro-actuated strain gradient along their length. This arrangement eases both the tight packing of the plant during desiccation and its fast opening upon rehydration. The insights gained from this work shed light on the hydro-responsive movements in plants and might contribute to the development of deployable structures with remarkable shape transformations in response to environmental stimuli.
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影响因子：
2.7
作者：
FRIEDMAN, J;GUNDERMAN, N;ELLIS, M
通讯作者：
ELLIS, M
影响因子：
2.7
作者：
GUTTERMAN, Y;GINOTT, S
通讯作者：
GINOTT, S
影响因子：
1.9
作者：
Parolin, Pia
通讯作者：
Parolin, Pia
DOI：
10.1098/rsta.2009.0003
发表时间：
2009-04-28
影响因子：
5
作者：
Burgert, Ingo;Fratzl, Peter
通讯作者：
Fratzl, Peter
影响因子：
56.9
作者：
Armon, Shahaf;Efrati, Efi;Sharon, Eran
通讯作者：
Sharon, Eran