Oxygen sensing coordinates photomorphogenesis to facilitate seedling survival.
Oxygen sensing coordinates photomorphogenesis to facilitate seedling survival.
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DOI：
10.1016/j.cub.2015.03.060
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发表时间：
2015-06-01
期刊：
影响因子：
9.2
通讯作者：
Holdsworth, Michael J.
中科院分区：
文献类型：
--
作者：
Abbas, Mohamad;Berckhan, Sophie;Rooney, Daniel J.;Gibbs, Daniel J.;Conde, Jorge Vicente;Correia, Cristina Sousa;Bassel, George W.;Marin-de la Rosa, Nora;Leon, Jose;Alabadi, David;Blazquez, Miguel A.;Holdsworth, Michael J.
在自然和农业系统中，成功从土壤中长出对于植物的定植至关重要。人们一直认为，土壤中无光是幼苗早期发育过程中感知到的首要信号，这会导致一种独特的形态发生模式（暗形态建成），其特征是在出土和光形态建成之前具有提供适应性优势的性状。这些性状包括抑制叶绿素合成、促进下胚轴伸长以及形成闭合的顶端弯钩以保护干细胞生态位免受损伤。然而，仅仅无光本身并不是幼苗早期发育的充分环境信号。在积水的土壤中可能会出现氧气含量降低（缺氧）的情况。因此我们假设地下缺氧可能是一个重要但迄今为止尚未被发现的调节幼苗发育的生态因素。在此，我们表明，黑暗环境下幼苗的存活和定植取决于它们通过第七组乙烯响应因子（ERFVII）转录因子稳定性增强来感知缺氧的能力。在多种开花植物类群中，缺氧被视为一种积极的环境因素，促进暗形态建成性状的维持。一旦感知到光照，缺氧会极大地提高存活率，而氧气对于随后光形态建成的有效完成是必需的。因此，与光感知一起，氧感知使得幼苗在早期生长过程中能够对复杂且不断变化的物理微环境做出综合反应。我们提出，植物在萌发后会监测土壤的气体环境，利用缺氧作为关键的外部信号来保护干细胞生态位，从而确保在地上出土时能够成功快速定植。
低氧（缺氧）提高黑暗中幼苗的存活率
缺氧通过氧介导的ERFVII转录因子降解被感知
稳定的ERFVII增强暗激活的发育并抑制光激活的发育
植物监测气体环境以协调光形态建成
阿巴斯等人证明缺氧感知是光形态建成的一个重要组成部分。缺氧作为一种积极的外部位置信号，控制形态发生和生化适应以保护干细胞生态位。在黑暗中感知缺氧可协调相关反应，使在光照下的存活和定植最大化。
Successful emergence from the soil is essential for plant establishment in natural and farmed systems. It has been assumed that the absence of light in the soil is the preeminent signal perceived during early seedling development, leading to a distinct morphogenic plan (skotomorphogenesis), characterized by traits providing an adaptive advantage until emergence and photomorphogenesis. These traits include suppressed chlorophyll synthesis, promotion of hypocotyl elongation, and formation of a closed apical hook that protects the stem cell niche from damage. However, absence of light by itself is not a sufficient environmental signal for early seedling development. Reduced oxygen levels (hypoxia) can occur in water-logged soils. We therefore hypothesized that below-ground hypoxia may be an important, but thus far undiscovered, ecological component regulating seedling development. Here, we show that survival and establishment of seedlings following darkness depend on their ability to sense hypoxia, through enhanced stability of group VII Ethylene Response Factor (ERFVII) transcription factors. Hypoxia is perceived as a positive environmental component in diverse taxa of flowering plants, promoting maintenance of skotomorphogenic traits. Hypoxia greatly enhances survival once light is perceived, while oxygen is necessary for the subsequent effective completion of photomorphogenesis. Together with light perception, oxygen sensing therefore allows an integrated response to the complex and changing physical microenvironment encountered during early seedling growth. We propose that plants monitor the soil’s gaseous environment after germination, using hypoxia as a key external cue to protect the stem cell niche, thus ensuring successful rapid establishment upon emergence above ground. Low oxygen (hypoxia) enhances seedling survival in the dark Hypoxia is sensed by oxygen-mediated degradation of ERFVII transcription factors Stable ERFVIIs enhance dark-activated development and repress light-activated development Plants monitor the gaseous environment to coordinate photomorphogenesis Abbas et al. demonstrate that hypoxia sensing is an important component of photomorphogenesis. Hypoxia acts as a positive external positional cue controlling morphogenetic and biochemical adaptations to protect the stem cell niche. Sensing hypoxia in the dark coordinates responses that maximize survival and establishment in the light.
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DOI：
10.1126/science.1250778
发表时间：
2014-06-06
期刊：
Science (New York, N.Y.)
影响因子：
--
作者：
Ni W;Xu SL;Tepperman JM;Stanley DJ;Maltby DA;Gross JD;Burlingame AL;Wang ZY;Quail PH
通讯作者：
Quail PH
DOI：
10.1016/j.cub.2009.05.066
发表时间：
2009-07-28
期刊：
Current biology : CB
影响因子：
--
作者：
Miller DL;Roth MB
通讯作者：
Roth MB
影响因子：
5.6
作者：
Abbas M;Alabadí D;Blázquez MA
通讯作者：
Blázquez MA
影响因子：
3.7
作者：
Liptzin, Daniel;Silver, Whendee L.;Detto, Matteo
通讯作者：
Detto, Matteo
影响因子：
7.2
作者：
Sperling, U;vanCleve, B;Armstrong, GA
通讯作者：
Armstrong, GA