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首页> 外文期刊>Journal of Experimental Botany >Interaction between calcium and potassium modulates elongation rate in cotton fiber cells
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Interaction between calcium and potassium modulates elongation rate in cotton fiber cells

机译：钙和钾之间的相互作用调节棉纤维细胞伸长率

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摘要

Calcium (Ca2+) is necessary for fiber cell development in cotton (Gossypium hirsutum), both as a cell wall structural component and for environmental signaling responses. It is also known that potassium (K+) plays a critical role in cotton fiber cell elongation. However, it is unclear whether Ca2+ integrates its activities with K+ to regulate fiber elongation. Here, we report the novel discovery that Ca2+ deficiency, when integrated with K+ signaling, promotes fiber elongation. Using inductively coupled plasma-mass spectrometry (ICP-MS), we determined dynamic profiles of the ionome in ovules and fibers at different developmental stages, and found that a high accumulation of macro-elements, but not Ca2+, was associated with longer fibers. Using an in vitro ovule culture system, we found that under Ca2+-deficient conditions, sufficient K+ (52 mM) rapidly induced ovule and fiber browning, while reduced K+ (2 or 27 mM) not only suppressed tissue browning but also altered fiber elongation. Reduced K+ also enhanced reactive oxygen species scavenging ability and maintained abscisic acid and jasmonic acid levels, which in turn compensated for Ca2+ deficiency. Ca2+ deficiency combined with reduced K+ (0 mM Ca2+ and 27 mM K+) produced longer fibers in cultured ovules, due to cell wall loosening by phytosulfokine (PSK), expansin (EXP), and xyloglucan endotransglycosylase/ hydrolase (XTH), and an increase of the K+ content of fiber cells. Using transgenic cotton, we showed that the CBL-INTERACTING PROTEIN KINASE 6 (GhCIPK6) gene mediates the uptake of K+ under Ca2+-deficient conditions. This study establishes a new link between Ca2+, K+, and fiber elongation.
机译：钙（CA2 +）是棉花（Gossypium hirsutum）中的纤维细胞发育所必需的，无论是电池壁结构部件还是环境信号传导反应。还已知钾（K +）在棉纤维细胞伸长中起着关键作用。然而，目前尚不清楚CA2 +是否将其活性与K +相结合以调节纤维伸长率。在这里，我们报告了CA2 +缺乏，当与K +信号传导集成时的新发现，促进了纤维伸长率。使用电感耦合等离子体质谱（ICP-MS），我们在不同发育阶段的胚珠和纤维中确定了离子组的动态曲线，发现宏观元件的高积累，但不是CA2 +与较长的纤维相关。使用体外胚珠培养系统，我们发现在Ca2 + - 缩小条件下，足够的K +（52mm）迅速诱导的胚珠和纤维烘烤，而减少k +（2或27mm）不仅抑制了组织褐变，而且还改变了纤维伸长率。降低K +也增强了活性氧物种清除能力，维持脱落酸和茉莉酸水平，这反过来补偿了Ca2 +缺乏。 Ca2 +缺乏在培养的胚珠中加入较长的K +（0mM Ca2 +和27mm K +），由于植物硫磷（PSK），扩展素（EXP）和木糖葡聚糖内甘油三糖基酶/水解酶（Xth），因此增加了培养的胚珠中的较长的胚珠。增加纤维细胞的K +含量。使用转基因棉，我们表明CBL相互作用蛋白激酶6（GHCIPK6）基因在CA2 +乙型条件下介导K +的摄取。本研究建立了CA2 +，K +和纤维伸长率之间的新联系。

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  • 来源
    《Journal of Experimental Botany》 |2017年第18期|共15页
  • 作者

    Guo Kai; Tu Lili; He Yonghui; Deng Jinwu; Wang Maojun; Huang Hui; Li Zhonghua; Zhang Xianlong;

  • 作者单位

    Huazhong Agr Univ Natl Key Lab Crop Genet Improvement Wuhan 430070 Hubei Peoples R China;

    Huazhong Agr Univ Natl Key Lab Crop Genet Improvement Wuhan 430070 Hubei Peoples R China;

    Huazhong Agr Univ Natl Key Lab Crop Genet Improvement Wuhan 430070 Hubei Peoples R China;

    Huazhong Agr Univ Natl Key Lab Crop Genet Improvement Wuhan 430070 Hubei Peoples R China;

    Huazhong Agr Univ Natl Key Lab Crop Genet Improvement Wuhan 430070 Hubei Peoples R China;

    Huazhong Agr Univ Natl Key Lab Crop Genet Improvement Wuhan 430070 Hubei Peoples R China;

    Huazhong Agr Univ Natl Key Lab Crop Genet Improvement Wuhan 430070 Hubei Peoples R China;

    Huazhong Agr Univ Natl Key Lab Crop Genet Improvement Wuhan 430070 Hubei Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 植物学;
  • 关键词

    Abscisic acid; calcium; fiber elongation; ionome; jasmonic acid; potassium; ROS;

    机译：脱落酸;钙;纤维伸长;离子;茉莉酸;钾;ROS;

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