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首页> 外文期刊>Journal of Experimental Botany >Glucose triggers stomatal closure mediated by basal signaling through HXK1 and PYR/RCAR receptors in Arabidopsis
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Glucose triggers stomatal closure mediated by basal signaling through HXK1 and PYR/RCAR receptors in Arabidopsis

机译：葡萄糖触发到通过拟南芥中的HXK1和Pyr / RCAR受体介导的基础信号传导介导的气孔闭合

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Sugars play important roles in regulating plant growth, development, and stomatal movement. Here, we found that glucose triggered stomatal closure in a dose- and time-dependent manner in Arabidopsis. Pharmacological data showed that glucose-induced stomatal closure was greatly inhibited by catalase [CAT; a reactive oxygen species (ROS) scavenger], diphenyleneiodonium chloride (DPI; an NADPH oxidase inhibitor), lanthanum chloride (LaCl3; a Ca2+ channel blocker), EGTA (a Ca2+ chelator), and two nitrate reductase (NR) inhibitors, tungstate and sodium azide (NaN3), while it was not affected by salicylhydroxamic acid (SHAM; a peroxidase inhibitor). Moreover, glucose induced ROS and nitric oxide (NO) production in guard cells of Arabidopsis. The ROS production was almost completely removed by CAT, strongly restricted by DPI, and was not affected by SHAM. NO production was partially suppressed by tungstate and NaN3, and the levels of NO were significantly reduced in the nia1-1nia2-5 mutant. Additionally, glucose- triggered stomatal closure was significantly impaired in gin1-1, gin2-1, pyr1pyl1pyl2pyl4, abi1-1, ost1, slac1-4, cpk6-1, and nia1-1nia2-5 mutants. Likewise, the reductions in leaf stomatal conductance (g(s)) and transpiration rate (E) caused by glucose were reversed in the above mutants. These results suggest that glucose-triggered stomatal closure may be dependent on basal signaling through PYR/RCAR receptors and hexokinase1 (HXK1).
机译：糖在调节植物生长，发展和气孔运动方面发挥重要作用。在这里，我们发现葡萄糖以拟南芥的剂量和时间依赖的方式引发了气孔闭合。药理学数据显示，葡萄糖诱导的气孔闭合受到过氧化酯酶[猫;反应性氧（ROS）清除剂]，二苯基碘鎓氯化物（DPI; NADPH氧化酶抑制剂），氯化镧（LACL3; CA2 +通道阻断剂），EGTA（CA2 +螯合剂）和两个硝酸还原酶（NR）抑制剂，钨酸盐和叠氮化钠（NaN3），同时它不受水杨羟胺酸（假物;过氧化物酶抑制剂）的影响。此外，葡萄糖诱导ROS和一氧化氮（NO）在拟南芥的保护细胞中产生。 ROS生产几乎完全被猫删除，受DPI强烈限制，不受假的影响。钨酸盐和NAN3没有部分抑制生产，NIA1-1NIA2-5突变体中否的水平显着降低。另外，GIN1-1，GIN2-1，Pyr1，OST1，SLAC1-4，CPK6-1和NIA1-1NIA2-5突变体中，葡萄糖引发的气孔闭合显着损害。同样地，在上述突变体中，由葡萄糖引起的叶片气孔导度（G（S））和蒸腾速率（e）的减少逆转。这些结果表明，葡萄糖触发的气孔闭合可以取决于通过Pyr / RCar受体和六酮酶1（HXK1）的基础信号传导。

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