A unique inventory of ion transporters poises the Venus flytrap to fast-propagating action potentials and calcium waves
A unique inventory of ion transporters poises the Venus flytrap to fast-propagating action potentials and calcium waves
复制标题
独特的离子转运蛋白库存使维纳斯捕蝇草能够快速传播动作电位和钙波
DOI：
10.1016/j.cub.2022.08.051
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发表时间：
2022
期刊：
影响因子：
9.2
通讯作者：
R. Hedrich
中科院分区：
文献类型：
--
作者：
S. Scherzer;J. Böhm;Shouguang Huang;Anda Iosip;Ines Kreuzer;D. Becker;M. Heckmann;K. Al;I. Dreyer;R. Hedrich
自19世纪以来，人们已经知道食肉的捕蝇草是电兴奋的。然而，捕蝇草动作电位（AP）的机制和分子实体仍然未知。当进入电兴奋阶段时，陷阱表达了离子转运蛋白的特征性库存，其中谷氨酸受体GLR 3.6 RNA的增加最为明显。触发毛发刺激或谷氨酸盐应用诱发AP和细胞质Ca 2+瞬变，其均以相同的速度从诱导部位沿沿着整个诱捕器叶表面传播。启动Ca 2+部分进入细胞质的上下文中的AP进一步增强的细胞器本地化的钙诱导的钙释放（CICR）样系统延长Ca 2+信号。当钙瞬变持续时，SKOR K+通道和AHA H+-ATP酶已经使AP复极化。通过计算AP的数量和持续时间较长的Ca 2+瞬变，该陷阱可以指导食肉植物狩猎周期的不同步骤。视频摘要
Since the 19thcentury, it has been known that the carnivorous Venus flytrap is electrically excitable. Nevertheless, the mechanism and the molecular entities of the flytrap action potential (AP) remain unknown. When entering the electrically excitable stage, the trap expressed a characteristic inventory of ion transporters, among which the increase in glutamate receptor GLR3.6 RNA was most pronounced. Trigger hair stimulation or glutamate application evoked an AP and a cytoplasmic Ca2+transient that both propagated at the same speed from the site of induction along the entire trap lobe surface. A priming Ca2+moiety entering the cytoplasm in the context of the AP was further potentiated by an organelle-localized calcium-induced calcium release (CICR)-like system prolonging the Ca2+signal. While the Ca2+transient persisted, SKOR K+channels and AHA H+-ATPases repolarized the AP already. By counting the number of APs and long-lasting Ca2+transients, the trap directs the different steps in the carnivorous plant's hunting cycle.Video abstract
影响因子：
7
作者：
Bemm F;Becker D;Larisch C;Kreuzer I;Escalante-Perez M;Schulze WX;Ankenbrand M;Van de Weyer AL;Krol E;Al-Rasheid KA;Mithöfer A;Weber AP;Schultz J;Hedrich R
通讯作者：
Hedrich R
影响因子：
5.6
作者：
Dreyer I;Gomez-Porras JL;Riaño-Pachón DM;Hedrich R;Geiger D
通讯作者：
Geiger D
影响因子：
3.4
作者：
Block, BM;Stacey, WC;Jones, SW
通讯作者：
Jones, SW