Nyanzvi dzeBiology paNational University yeSingapore dzakaona kuti zvinomera zvinodzivisa sei kuumbwa kwe stomata uye ma pores asingaoneki pamusoro pepamusoro pawo kuderedza kurasikirwa kwemvura panguva yekusanaya kwemvura. Pys.org portal.
Stomata, iyo iripo pamusoro pemashizha, yakakosha pakuchinjana kwegasi pakati pemiti nemhepo. Zvisinei, ndiwo zvakare manyuko makuru ekurasikirwa kwemvura kana yasiya mashizha semhute wemvura. Kana paine kushomeka kwemvura, zvinomera zvinoita maviri stomatal reactions kuchengetedza mvura: inovhara pores ye stomata iripo uye inoderedza kuumbwa kwezvitsva.
Iyi mhinduro, iyo inopindirana neabscisic acid (ABA), inokosha pakugadzirisa zvirimwa kusvika pakusanaya kwemvura uye inonyanya kukosha kuchengetedza kubudirira kwekurima mumamiriro ekunze ari kuchinja. Nekudaro, haina kumbobvira yadzidzwa chaizvo kuti ABA inodzivirira sei kugadzirwa kwe stomatal.
Mukuburitswa kwazvino Sayenzi Inofambira Mberi Chikwata chekutsvagisa chinotungamirwa neLAU Associate Purofesa On Sun kubva kuDhipatimendi reBiological Sayenzi paNational University yeSingapore yakashuma nezve nzira iri pasi pekusanaya-kunamira kwekukura kwedumbu.
Masayendisiti akawana kuti iyo huru yekusanaya-yakagadziriswa ABA inoratidzira kinases yakananga phosphorylate iyo master stomatal regulator SPEECHLESS (SPCH). Phosphorylation inoreva kuwedzera kweboka rephosphate kune molecule. Iyi ABA-induced phosphorylation yeSPCH protein inoitika panzvimbo mbiri dzakasiyana uye inokonzera kuderedzwa kweSPCH.
Nekuti SPCH inosimudzira stomatal kukura, SPCH phosphorylation inotungamira kudzikira kweSPCH mazinga uye stomata nhamba, uye kubviswa kwemasaiti aya (sample S240/271A) kwakakonzera mhinduro inopesana. Zvakakosha, vatsvakurudzi vakaratidzawo kuti zvidyarwa zvine nzvimbo dzakachinjwa dzeSPCH phosphorylation dzakaratidza kusiyana kwekusanaya kwemvura.
Mhedzisiro iyi inoratidza kuti imwe "kodhi" iri pasi pemhinduro yakakosha yezvirimwa kuchengetedza mvura. Nekuzvishandisa, tinokwanisa kugadzirisa kusanaya kwemvura kwezvirimwa uye tobatsira kuti zvigadzirisire mamiriro ekukura akasiyana, kubva pakurima kwechinyakare kusvika kumadhorobha.