Wake wazibuza ukuthi kungani ezinye izithelo nemifino kubonakala kugcwele ukunambitheka kuyilapho ezinye kusilela? Impendulo ingase itholakale emthonjeni ongalindelekile - i-melatonin. Kulesi sihloko, singena ocwaningweni lwakamuva oluvela ku-Phys.org nakweminye imithombo ethembekile, sithola izindlela ezimangazayo i-melatonin ethonya ngayo ikhwalithi yezitshalo, amazinga e-antioxidant, kanye nomkhiqizo wezolimo uwonke. Abalimi, izazi zezolimo namahlathi, onjiniyela bezolimo, abanikazi bamapulazi, nososayensi bezolimo, balungiselela ukumangala!
Iminyaka eminingi, besibabaza ubuhle nokunambitheka kwezithelo nemifino esiyintandokazi, kodwa besingazi ukuthi izici zabo ezihlaba umxhwele zingaxhunyaniswa nenhlanganisela ehlotshaniswa ngokuyinhloko nokulala - i-melatonin. Ucwaningo lwakamuva olufakwe ku-Phys.org luveze ukuthi i-melatonin idlala indima ebalulekile ekukhuleni nasekuthuthukisweni kwezitshalo, ekugcineni ibe nomthelela wokuqukethwe okunomsoco kanye nokunambitha komkhiqizo esiwujabulelayo.
I-Melatonin iyi-hormone eyenzeka ngokwemvelo etholakala kokubili ezitshalweni nasezilwaneni, futhi yaziwa ngokuyinhloko ngendima yayo ekulawuleni imijikelezo yokulala nokuvuka kubantu. Kodwa-ke, ukuba khona kwayo kanye nemisebenzi embusweni wezitshalo kube yisihloko sokukhula kwentshisekelo ocwaningweni lwezolimo. Lolu cwaningo lunikeza ukukhanya kokuthi le molecule esebenza ngezindlela eziningi inikela kanjani kukhwalithi nezinzuzo zezempilo zezithelo nemifino.
Ngokocwaningo, izitshalo ezihlanganisa amazinga aphezulu e-melatonin zivame ukukhombisa ukumelana okuthuthukisiwe kwezingcindezi zemvelo, njengesomiso, amazinga okushisa aphezulu, nemisebe ye-UV. Lokhu kubekezelela ukucindezeleka kubangela izitshalo ezinamandla, ezinempilo okungenzeka ukuthi ziphumelele ngisho nangaphansi kwezimo eziyinselele.
Ukwengeza, i-melatonin iyi-antioxidant ebalulekile ezitshalweni. Isiza ukuqeda izinhlobo ze-oxygen esebenzayo (ROS) eziyingozi ezikhiqizwa ngesikhathi se-photosynthesis, ngaleyo ndlela ivikela amangqamuzana ezitshalo emonakalweni we-oxidative. Ngenxa yalokho, izitshalo ezinokuqukethwe okuphezulu kwe-melatonin ziziqhayisa ngamazinga athuthukisiwe e-antioxidant, ahumusheka emikhiqizweni enomsoco futhi enenzuzo kubathengi.
Ngaphezu kwalokho, i-melatonin ithonya ukukhiqizwa kwama-metabolite esibili esitshalo, abhekele ukunambitheka okuhlukile namaphunga ezithelo nemifino. Amazinga aphezulu e-melatonin ahlotshaniswa nokwanda kwalezi zinhlanganisela, okwenza umkhiqizo unambitheke kakhudlwana futhi ufiseleke kubathengi.
Imithelela yalolu cwaningo kubalimi kanye nemboni yezolimo mikhulu. Ngokuqonda indima ye-melatonin ku-physiology yezitshalo, abalimi bangasebenzisa amasu amasha okulima izitshalo ezinamazinga aphezulu e-melatonin, okuholela ekuqineni kwezitshalo okuthuthukisiwe, inani lokudla okunempilo, kanye nokukhanga kwemakethe.
Sengiphetha, indima engalindelekile ye-melatonin ekukhuleni nasekuthuthukisweni kwezithelo nemifino igqamisa ubudlelwano obuyinkimbinkimbi nobuthakazelisayo phakathi kwezitshalo nemvelo. Ukwamukela lolu lwazi emisebenzini yezolimo kungavula indlela yekusasa lapho izitshalo zingagcini nje ngokuba namandla kodwa futhi zigcwele ukunambitheka futhi zinothiswe ngezinhlanganisela ezikhuthaza impilo. Njengoba sijula ekujuleni kwezimfihlo ze-melatonin, isahluko esisha endabeni yezolimo siyaqala, lapho abalimi, izazi zezolimo namahlathi, onjiniyela bezolimo, abanikazi bamapulazi, nososayensi bephethe lolu hambo olujabulisayo.
Omaka: Ezolimo, i-Melatonin, I-Plant Physiology, Ikhwalithi Yezitshalo, Ama-Antioxidants, Ama-Metabolites Asesibili Sezitshalo, Ucwaningo Lwezolimo, Ukuqina Kwezitshalo, Inani Lokudla Okunempilo, Ukulima Okuqhubekayo