Cishe u-7.0% wendawo yonke yomhlaba uthintwa usawoti1, okusho ukuthi umhlaba ongaphezu kwezigidi ezingu-900 wamahektha othintekayo kokubili usawoti kanye nosawoti we-sodic salinity2, okwenza u-20% womhlaba olinyiwe kanye no-10% womhlaba oniselwayo. ithatha ingxenye yendawo futhi inosawoti omningi3. Umhlabathi onosawoti uyinkinga enkulu ebhekene nezolimo zasePakistan4,5. Kulokhu, cishe amahektha ayizigidi eziyisi-6.3 noma u-14% womhlaba oniselwayo okwamanje uthintwa usawoti6.
Ukucindezeleka kwe-Abiotic kungashintshai-hormone yokukhula yezitshaloukuphendula, okuholela ekwehleni kokukhula kwezitshalo kanye nesivuno sokugcina7. Lapho izitshalo zichayeka ekucindezelekeni kukasawoti, ibhalansi phakathi kokukhiqizwa kwezinhlobo ze-oxygen esebenzayo (ROS) kanye nomphumela wokucisha wama-enzyme e-antioxidant kuyaphazamiseka, okuholela ezitshalweni ezihlushwa yi-oxidative stress8. Izitshalo ezinokugxila okuphezulu kwe-antioxidant enzymes (kokubili okusebenzayo kanye ne-inducible) zinokumelana okunempilo emonakalweni we-oxidative, njenge-superoxide dismutase (SOD), i-guaiacol peroxidase (POD), i-peroxidase-catalase (CAT), i-ascorbate peroxidase (APOX), kanye ne-glutathione reductase. (GR) ingathuthukisa ukubekezelelwa kukasawoti ezitshalweni ngaphansi kwengcindezi kasawoti9. Ngaphezu kwalokho, kuye kwabikwa ukuthi ama-phytohormones adlala indima yokulawula ekukhuleni nasekuthuthukisweni kwezitshalo, ukufa kwamangqamuzana ahleliwe, nokuphila ngaphansi kwezimo zemvelo ezishintshayo10. I-Triacontanol iwutshwala obuyisisekelo obugcwele obuyingxenye ye-epidermal wax yezitshalo futhi inezakhiwo ezikhuthaza ukukhula kwezitshalo11,12 kanye nezakhiwo ezikhuthaza ukukhula ekugxilweni okuphansi13. Isicelo se-Foliar singathuthukisa kakhulu isimo se-photosynthetic pigment, ukuqoqwa kwe-solute, ukukhula, nokukhiqizwa kwe-biomass ezitshalweni14,15. Ukusetshenziswa kwe-Foliar kwe-triacontanol kungathuthukisa ukubekezelelana kokucindezeleka kwezitshalo16 ngokulawula umsebenzi wama-enzymes amaningi we-antioxidant17, okwandisa okuqukethwe kwe-osmoprotectant yezicubu zeqabunga lezitshalo11,18,19 nokuthuthukisa ukusabela kokuthatha amaminerali abalulekile K + kanye ne-Ca2 +, kodwa hhayi i-Na +. 14 Ngaphezu kwalokho, i-triacontanol ikhiqiza ushukela owehlisa kakhulu, amaprotheni ancibilikayo, nama-amino acid ngaphansi kwezimo zokucindezeleka20,21,22.
Imifino inothile ngama-phytochemicals kanye nezakhamzimba futhi ibalulekile ezinqubweni eziningi ze-metabolic emzimbeni womuntu23. Ukukhiqizwa kwemifino kusongelwa ukwanda kukasawoti enhlabathini, ikakhulukazi ezindaweni zokulima eziniselwa ngenkasa, ezikhiqiza ama-40.0% okudla komhlaba24. Izitshalo zemifino ezifana no-anyanisi, ukhukhamba, isitshalo seqanda, upelepele notamatisi ziyazwela ku-salinity25, kanti ukhukhamba uyimifino ebalulekile yokudla komuntu emhlabeni jikelele26. Ukucindezelwa kukasawoti kunomthelela omkhulu ekukhuleni kwezinga likakhukhamba, nokho, amazinga kasawoti angaphezu kwama-25 mM aphumela ekuncipheni kwesivuno esifika ku-13%27,28. Imiphumela eyingozi yosawoti kukhukhamba iphumela ekwehleni kokukhula kwezitshalo kanye nesivuno5,29,30. Ngakho-ke, inhloso yalolu cwaningo kwakuwukuhlola indima ye-triacontanol ekunciphiseni ukucindezeleka kukasawoti ku-cucumber genotypes kanye nokuhlola ikhono le-triacontanol lokukhuthaza ukukhula nokukhiqiza kwezitshalo. Lolu lwazi lubalulekile futhi ekwakheni amasu afanele inhlabathi enosawoti. Ngaphezu kwalokho, sinqume izinguquko ku-ion homeostasis ku-cucumber genotypes ngaphansi kwengcindezi ye-NaCl.
Umthelela we-triacontanol kuzilawuli ze-osmotic ze-inorganic emaqabunga ama-genotypes amakhukhamba amane ngaphansi kwengcindezi evamile kanye nosawoti.
Lapho ikhukhamba i-genotypes ihlwanyelwe ngaphansi kwezimo zokucindezeleka kukasawoti, inani lenani lezithelo nesilinganiso sesisindo sezithelo zancishiswa kakhulu (Fig. 4). Lokhu kwehliswa kugqame kakhulu ku-Summer Green kanye ne-20252 genotypes, kuyilapho i-Marketmore ne-Green Long igcine inombolo ephezulu yesithelo nesisindo ngemva kokuphonselwa inselelo kosawoti. Ukusetshenziswa kwe-Foliar kwe-triacontanol kunciphise imiphumela emibi yokucindezeleka kukasawoti kanye nokwanda kwenombolo yesithelo nesisindo kuwo wonke ama-genotypes ahloliwe. Kodwa-ke, i-Marketmore ephathwa nge-triacontanol ikhiqize inombolo yesithelo ephakeme kakhulu enesisindo esimaphakathi esiphezulu ngaphansi kwezimo ezicindezelekile nezilawulwayo uma kuqhathaniswa nezitshalo ezingaphathwanga. I-Summer Green kanye no-20252 yayinokuqukethwe okuphezulu kakhulu okuncibilika okuncibilikayo esithelweni sekhukhamba futhi asebenzanga kahle uma kuqhathaniswa ne-Marketmore kanye ne-Green Long genotypes, eyayinokugxiliswa okuphansi kwengqikithi yezinto eziqinile ezincibilikayo.
Umthelela we-triacontanol ekukhiqizeni ama-genotypes ama-cucumber amane ngaphansi kwezimo ezijwayelekile kanye nengcindezi kasawoti.
Ukuhlushwa okuphelele kwe-triacontanol kwaba ngu-0.8 mg/l, okwavumela ukunciphisa imiphumela ebulalayo ye-genotypes ehloliwe ngaphansi kokucindezeleka kukasawoti nezimo ezingenaso ingcindezi. Kodwa-ke, umphumela we-triacontanol kuGreen-Long kanye ne-Marketmore wawusobala kakhulu. Uma kucatshangelwa amandla okubekezelela usawoti alezi genotype kanye nempumelelo ye-triacontanol ekwehliseni imiphumela yokucindezeleka kukasawoti, kungenzeka ukuncoma ukukhulisa lezi genotypes enhlabathini enosawoti ngokufafaza ngamahlamvu nge-triacontanol.
Isikhathi sokuthumela: Nov-27-2024