{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,26]],"date-time":"2026-08-26T06:36:15Z","timestamp":1787726175335,"version":"build-2784847793"},"reference-count":68,"publisher":"Wiley","issue":"2","license":[{"start":{"date-parts":[[2018,10,3]],"date-time":"2018-10-03T00:00:00Z","timestamp":1538524800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"name":"Research Grant for Encouragement of Students FY2017, Graduate School of Environmental and Life Science, Okayama University"},{"name":"Japan Advanced Plant Science Research Network"},{"name":"JSPS KAKENHI Grant-in-Aid for Scientific Research on Innovative Areas","award":["24114709"],"award-info":[{"award-number":["24114709"]}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Plant Cell &amp; Environment"],"published-print":{"date-parts":[[2019,2]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Plants closing stomata in the presence of harmful gases is believed to be a stress avoidance mechanism. SO<jats:sub>2<\/jats:sub>, one of the major airborne pollutants, has long been reported to induce stomatal closure, yet the mechanism remains unknown. Little is known about the stomatal response to airborne pollutants besides O<jats:sub>3<\/jats:sub>. <jats:italic>SLOW ANION CHANNEL\u2010ASSOCIATED 1<\/jats:italic> (<jats:italic>SLAC1<\/jats:italic>) and <jats:italic>OPEN STOMATA 1<\/jats:italic> (<jats:italic>OST1<\/jats:italic>) were identified as genes mediating O<jats:sub>3<\/jats:sub>\u2010induced closure. <jats:italic>SLAC1<\/jats:italic> and <jats:italic>OST1<\/jats:italic> are also known to mediate stomatal closure in response to CO<jats:sub>2<\/jats:sub>, together with <jats:italic>RESPIRATORY BURST OXIDASE HOMOLOG<\/jats:italic>s (<jats:italic>RBOH<\/jats:italic>s). The overlaying roles of these genes in response to O<jats:sub>3<\/jats:sub> and CO<jats:sub>2<\/jats:sub> suggested that plants share their molecular regulators for airborne stimuli. Here, we investigated and compared stomatal closure event induced by a wide concentration range of SO<jats:sub>2<\/jats:sub> in Arabidopsis through molecular genetic approaches. O<jats:sub>3<\/jats:sub>\u2010 and CO<jats:sub>2<\/jats:sub>\u2010insensitive stomata mutants did not show significant differences from the wild type in stomatal sensitivity, guard cell viability, and chlorophyll content revealing that SO<jats:sub>2<\/jats:sub>\u2010induced closure is not regulated by the same molecular mechanisms as for O<jats:sub>3<\/jats:sub> and CO<jats:sub>2<\/jats:sub>. Nonapoptotic cell death is shown as the reason for SO<jats:sub>2<\/jats:sub>\u2010induced closure, which proposed the closure as a physicochemical process resulted from SO<jats:sub>2<\/jats:sub> distress, instead of a biological protection mechanism.<\/jats:p>","DOI":"10.1111\/pce.13406","type":"journal-article","created":{"date-parts":[[2018,7,17]],"date-time":"2018-07-17T03:50:47Z","timestamp":1531799447000},"page":"437-447","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":20,"title":["The mechanism of SO<sub>2<\/sub>\u2010induced stomatal closure differs from O<sub>3<\/sub> and CO<sub>2<\/sub> responses and is mediated by nonapoptotic cell death in guard cells"],"prefix":"10.1111","volume":"42","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-9056-283X","authenticated-orcid":false,"given":"Lia","family":"Ooi","sequence":"first","affiliation":[{"name":"Institute of Plant Science and Resources Okayama University  Kurashiki 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