Temperature Modulates Tissue-Specification Program to Control Fruit Dehiscence in Brassicaceae.
Temperature Modulates Tissue-Specification Program to Control Fruit Dehiscence in Brassicaceae.
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DOI：
10.1016/j.molp.2018.01.003
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发表时间：
2018-04-02
期刊：
影响因子：
27.5
通讯作者：
Østergaard L
中科院分区：
文献类型：
--
作者：
Li XR;Deb J;Kumar SV;Østergaard L
植物通过重新编程重要的发育途径来应对昼夜和季节的温度变化。在气候变化威胁全球农作物产量的背景下，了解植物生长和繁殖的环境调节的分子机制至关重要。在这里，我们报告说，升高的温度会加速十字花科成员的果实开裂，包括模式植物拟南芥和重要作物物种。拟南芥果实发育是由相互作用的调控基因网络控制的。其中，INDEHISCENT（IND）基因是介导果实张开的瓣膜边缘组织的关键调节因子，从而促进果实开裂。我们证明了阀裕度的发展在较高温度下加速，并且 IND 是热传感控制的目标。我们的结果表明，温度诱导的染色质动力学促进了 IND 上调，从而加速了瓣膜边缘规范和种子的传播。具体来说，我们表明温度诱导的 IND 表达变化与热感 H2A.Z 核小体动力学相关。这些发现建立了一个将组织特性与热传感联系起来的分子框架，并为生产耐温作物指明了方向。气候变化对作物生产力构成全球威胁，了解温度如何在分子水平上调节发育产出与作物改良变得越来越相关。这项研究表明，十字花科不同物种的果实开裂（种子传播）在较高温度下会增强，并揭示了控制这种开裂的热感控制机制。
Plants respond to diurnal and seasonal changes in temperature by reprogramming vital developmental pathways. Understanding the molecular mechanisms that define environmental modulation of plant growth and reproduction is critical in the context of climate change that threatens crop yield worldwide. Here, we report that elevated temperature accelerates fruit dehiscence in members of the Brassicaceae family including the model plant Arabidopsis thaliana and important crop species. Arabidopsis fruit development is controlled by a network of interacting regulatory genes. Among them, the INDEHISCENT (IND) gene is a key regulator of the valve-margin tissue that mediates fruit opening, hence facilitating fruit dehiscence. We demonstrated that the valve-margin development is accelerated at higher temperature and that IND is targeted for thermosensory control. Our results reveal that IND upregulation is facilitated via temperature-induced chromatin dynamics leading to accelerated valve-margin specification and dispersal of the seed. Specifically, we show that temperature-induced changes in IND expression are associated with thermosensory H2A.Z nucleosome dynamics. These findings establish a molecular framework connecting tissue identity with thermal sensing and set out directions for the production of temperature-resilient crops. Climate change is posing a global threat to crop productivity, and understanding how temperature modulates developmental outputs at the molecular level is becoming increasingly relevant to crop improvement. This study shows that fruit dehiscence (seed dispersal) is enhanced at higher temperatures across diverse species in the Brassicaceae family and reveals the thermosensory control mechanism by which this is controlled.
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影响因子：
4.6
作者：
Choi, Kyuha;Park, Chulmin;Lee, Ilha
通讯作者：
Lee, Ilha
DOI：
10.1046/j.1365-2818.1996.111391.x
发表时间：
1996-02-01
期刊：
JOURNAL OF MICROSCOPY-OXFORD
影响因子：
--
作者：
Spence, J;Vercher, Y;Harris, N
通讯作者：
Harris, N
DOI：
10.1006/jaer.1996.0091
发表时间：
1996-11-01
期刊：
JOURNAL OF AGRICULTURAL ENGINEERING RESEARCH
影响因子：
--
作者：
Price, JS;Hobson, RN;Bruce, DM
通讯作者：
Bruce, DM
影响因子：
64.8
作者：
Liljegren, SJ;Ditta, GS;Yanofsky, MF
通讯作者：
Yanofsky, MF
影响因子：
11.6
作者：
SAVIDGE, B;ROUNSLEY, SD;YANOFSKY, MF
通讯作者：
YANOFSKY, MF