Masu bincike daga Sashen Biochemistry a Cibiyar Kimiyya ta Indiya (IISc) sun gano wata hanya da aka daɗe ana nema don daidaita ci gaban tsirrai na ƙasa kamar bryophytes (ƙungiyar da ta haɗa da mosses da liverworts) waɗanda aka adana a cikin tsire-tsire masu fure na baya.
Binciken, wanda aka buga a mujallar Nature Chemical Biology, ya mayar da hankali kan tsarin da ba na tsari ba na sunadaran DELLA, wani babban mai kula da girma wanda ke danne rarrabuwar ƙwayoyin halitta a cikin embryophytes (shuke-shuken ƙasa).
Abin sha'awa, bryophytes, tsire-tsire na farko da suka bayyana a ƙasa kimanin shekaru miliyan 500 da suka wuce, ba su da mai karɓar GID1 duk da samar da phytohormone GA. Wannan ya haifar da tambayar yadda aka tsara girma da ci gaban waɗannan tsire-tsire na ƙasa na farko.
Ta amfani da liverwort Marchantia polymorpha a matsayin tsarin samfuri, masu binciken sun gano cewa waɗannan tsire-tsire na asali suna amfani da wani enzyme na musamman, MpVIH, wanda ke samar da manzo na selula inositol pyrophosphate (InsP₈), wanda ke ba su damar rushe DELLA ba tare da buƙatar gibberellic acid ba.
Masu binciken sun gano cewa DELLA na ɗaya daga cikin abubuwan da VIH kinase ke kai hari a cikin ƙwayoyin halitta. Bugu da ƙari, sun lura cewa tsire-tsire marasa MpVIH suna kwaikwayon nau'ikan tsire-tsire M. polymorpha waɗanda ke fitar da DELLA fiye da kima.
"A wannan lokacin, mun yi farin ciki da fahimtar ko kwanciyar hankali ko aiki na DELLA ya ƙaru a cikin shuke-shuken da ba su da isasshen MpVIH," in ji Priyanshi Rana, marubuci na farko kuma ɗalibi na digiri na biyu a ƙungiyar bincike ta Lahey. Dangane da hasashensu, masu binciken sun gano cewa hana DELLA ya ceci lahani na girma da ci gaban shuke-shuken da suka canza MpVIH. Waɗannan sakamakon sun nuna cewa VIH kinase yana lalata DELLA, ta haka yana haɓaka girma da ci gaban shuke-shuke.
Binciken da aka yi kan sunadaran DELLA ya samo asali ne tun daga juyin juya halin kore, lokacin da masana kimiyya suka yi amfani da damarsu ba tare da saninsu ba don samar da nau'ikan semi-dwarf masu yawan amfanin gona. Duk da cewa cikakkun bayanai game da yadda suke aiki ba a fayyace su ba a lokacin, fasahar zamani ta ba wa masana kimiyya damar sarrafa ayyukan waɗannan sunadaran ta hanyar injiniyan kwayoyin halitta, wanda hakan ke ƙara yawan amfanin gona yadda ya kamata.
Binciken tsirrai na farko a ƙasa kuma yana ba da haske game da juyin halittarsu a cikin shekaru miliyan 500 da suka gabata. Misali, kodayake tsire-tsire na zamani suna lalata sunadaran DELLA ta hanyar tsarin gibberellic acid, wuraren ɗaure InsP₈ suna da kariya. Waɗannan binciken suna ba da haske game da juyin halittar hanyoyin siginar tantanin halitta a tsawon lokaci.
An sake buga wannan labarin daga waɗannan majiyoyi. Lura: Ana iya gyara rubutun don tsawon lokaci da abun ciki. Don ƙarin bayani, tuntuɓi majiyar. Ana iya samun manufofin sanarwar manema labarai a nan.
Lokacin Saƙo: Satumba-15-2025