The process of seed maturation is influenced by mechanical constraints.

The process of seed maturation is influenced by mechanical constraints.
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种子成熟过程受机械约束的影响

DOI:
10.1111/nph.16815
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发表时间:
2021
期刊:
The New phytologist
影响因子:
--
通讯作者:
Borisjuk L
Borisjuk L
中科院分区:
--
文献类型:
--
作者:
Rolletschek H;Muszynska A;Borisjuk L

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对活组织的物理作用力可以引发发育反应。在拟南芥(Arabidopsis thaliana)和许多拟南芥科植物的胚胎发生过程中,膨胀的胚紧靠胚囊,迫使胚囊弯曲和折叠。这种机械约束似乎促进了种子的脂质和蛋白质的积累,这一点在这里已经通过将磁共振成像与在分子和生物化学水平上进行的各种分析相结合得到了验证。证据是,无论是在植物体内还是在试管内,发育中的甘蓝型油菜胚确实通过加速其成熟而对物理限制作出反应。虽然这种效应的机制基础仍有待充分阐明,本实验已经揭示了种子成熟过程中的代谢转换的生长限制施加的主要影响。机械刺激的识别(称为机械感测)是活细胞的普遍性质,并且对于它们的健康以及因此对于整个生物体的生长和发育可能是至关重要的(Hamant等人,2009; Mirabet等人,2011; Piccolo,2013)。动物已经进化出一种复杂的机械感应机制(Fratzl & Barth,2009)。植物对机械刺激的感知和反应能力长期以来一直受到科学界的关注(达尔文&达尔文,1880),并且存在像食虫捕蝇草(Dionaea muscipula)这样的突出例子。近年来,许多作者已经揭示了这种能力的机制基础的某些方面(Chehab等人,2009; Kurusu等人,2013; Landrein & Hamant,2013; Monshausen & Haswell,2013; Basu & Haswell,2017; Landrein
Physical forces on living tissue can elicita developmental response. During embryogenesis in Arabidopsis thaliana and many Brassicaceae species, the expanding embryo abuts the embryo sac, forcing it to bend and fold. That this mechanical constraint appears to boost the seed's accumulation of lipid and protein has been validated here by combining magnetic resonance imaging with various analyses carried out at the molecular and biochemical level. The evidence is that, both in planta and in vitro, the developing Brassica napus embryo indeed responds to physical restraint by an acceleration in its maturation. While the mechanistic basis of this effect remains to be fully elucidated, the present experiments have revealed the major influence exerted by growth constraints over metabolic switching during the seed maturation process. The recognition of mechanical stimuli (referred to as mechanosensing) is a universal property of living cells, and can be critical for their health, and thus for the growth and development of the entire organism (Hamant et al., 2009; Mirabet et al., 2011; Piccolo, 2013). Animals have evolved a sophisticated mechanosensing machinery (Fratzl & Barth, 2009). Plants' ability to sense and respond to mechanical stimuli have long been of scientific interest (Darwin & Darwin, 1880), and there exist prominent examples like the insectivorous Venus flytrap (Dionaea muscipula). In recentyears, a number ofauthors have revealed some aspects of the mechanistic basis of this capacity (Chehab et al., 2009; Kurusu et al., 2013; Landrein & Hamant, 2013; Monshausen & Haswell, 2013; Basu & Haswell, 2017; Landrein
DOI: 10.1104/pp.15.00385
发表时间: 2015-07-01
期刊: PLANT PHYSIOLOGY
影响因子: 7.4
作者:
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影响因子: 11.6
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DOI: --
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DOI: --
发表时间: 2013
期刊: Nature
影响因子: 64.8
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DOI: 10.1111/tpj.14324
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影响因子: 7.2
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