ABSTRACT Hydrogen sulfide (H2S) is an important gas signal molecule, but little is known about its signal mechanism. Ca2+ is an important second messenger in plant cells, and its fluctuation in the cytoplasm causes downstream physiological responses. Our previous study found that H2S can induce the accumulation of hydrogen peroxide (H2O2). We also found that reactive oxygen species (ROS) can further induce the Ca2+ influx in guard cells by noninvasive micro-teat technology (NMT). This study confirmed that the accumulation of reactive oxygen species to induce Ca2+ signal in guard cells, resulting in stomatal closure. Thus, revealing a novel mechanism of H2S promoting stomatal closure.

中文翻译：

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硫化氢通过调节活性氧的积累在保卫细胞中诱导 Ca2+ 信号

摘要 硫化氢（H2S）是一种重要的气体信号分子，但对其信号机制知之甚少。Ca2+是植物细胞中重要的第二信使，其在细胞质中的波动引起下游生理反应。我们之前的研究发现 H2S 可以诱导过氧化氢 (H2O2) 的积累。我们还发现活性氧 (ROS) 可以通过无创微乳头技术 (NMT) 进一步诱导保卫细胞中的 Ca2+ 流入。该研究证实活性氧的积累在保卫细胞中诱导Ca2+信号，导致气孔关闭。因此，揭示了 H2S 促进气孔关闭的新机制。