Zonke izitshalo zisebenzisa amandla amakhulu ngenkathi kwenziwa izimbali zazo. Kungani? Ngoba kuzoncika, hhayi kuphela kwesinye isizukulwane, kepha futhi nokusinda kohlobo ngalunye lohlobo oluthile emhlabeni. Ezinye zilula kunezinye, kepha iningi lazo zinesakhiwo esaziwa njenge amandla.
Le yingxenye yezitho zezimbali zesilisa, futhi yiyona ebhekele kakhulu (kanye nomoya) ukuthi emvelweni, ikakhulukazi ngesikhathi sentwasahlobo, kunokuxinana okukhulu kwempova.
Yini intambo futhi zithini izingxenye zayo?
Amandla Luhlobo lwentambo ende ephuma maphakathi nembali ethwala isikhwama sempova lapho kukhiqizwa khona okusanhlamvu kwempova.. Iqoqo lama-stamens libizwa nge-androecium, futhi liyingxenye yohlelo lwesilisa lokuzala izitshalo, zombili ukuzivocavoca (Yilezo ezingavikeli imbewu yazo, njengama-conifers noma ama-fern) njenge angiosperms (Yizona ezivikela imbewu, futhi zivame ukuba nezimbali ezibukisa kakhulu, njenge-bulbous noma iningi lezihlahla).
Izingxenye zayo zimi kanje:
- Intambo: yisiqu esincane esisekela i-anther. Kungaba i-laminar noma ihlukaniswe, kuya ngomndeni wesitshalo.
- Teak: teak yizingxenye ezimbili ukuthi i-anther ihlukaniswe. Imvamisa ngasinye siqukethe amasaka amabili lapho kukhiqizwa khona impova.
- Ukuxhumana: kuyingxenye yezicubu eziyinyumba ezigcina i-teak zihlangane futhi zakhe umzimba nazo.
- Impova sac: ebizwa nangokuthi i-sporangium, kuyisakhiwo lapho kwenziwa khona impova.
Ngabe i-stamen yama-angiosperms yehluke kanjani kuleyo yama-gymnosperms?
I-morphology yayo iguquka kancane ngokuya ngohlobo lwesitshalo esikulo:
Ama-angiosperms
I-stamen kungenzeka i-anther ishumekwe eshidini, noma ingaxhunywa kusamukeli ngentambo. Kulokhu kokugcina, ingxenye yesicubu eqinisa umcibisholo wayo womabili, ibabambe ndawonye, yaziwa njengezixhumanisi, engakhuli kahle kwezinye izitshalo zakudala, itiye libonakala kakhulu.
Ama-Gymnosperms
Isithombe - amakilasi2005
Lezi zitshalo unama-stamens afana nezikali, phansi kwawo sithola izikhwama zempova.
Yiziphi izinhlobo zentambo ezikhona?
Kunezinhlobo ezimbili:
Iziqu ze-Connate
Yilezo ezihlanganiswe ngumoya ofanayo:
- Ama-diadeph: ahlanganiswe ezakhiweni ezimbili ze-androic, kepha hhayi ngokuphelele.
- AmaMondelphs: ahlanganiswe kwisakhiwo esisodwa esihlanganisiwe.
- Ama-Polyadelphs: ahlanganiswe ezakhiweni ezahlukahlukene ze-androic.
- I-Sinantéreos: yibo kuphela abahlanganise ama-anthers.
Hlanganisa izikhuthazi
Lezi stamens yizo ezihlanganiswe ngaphezulu kokuvama okukodwa:
- I-Didynamos: kunezimbhangqwana ezimbili ze-stamens zobude obuhlukile.
- Ama-Epipetals: vuka ku-corolla.
- Kuyasebenza: yilezo ezeqa i-corolla.
- Ifaka: ngokungafani neyangaphambilini, lezi azidluli i-corolla.
- Ukuqhuma: yilezo ezinde kakhulu, ezinde ngaphezu kwe-corolla.
- I-Tetradinam: vuka njengeqembu labayisithupha, lapho ababili bemfushane kunabo bonke abanye.
Uyini umsebenzi wentambo?
Ngaphandle kwama-stamen, bekungaba khona kuphela izitshalo ezingaphindaphindwa ngokusikwa, amaswidi noma izitebele. Ngamanye amagama, umhlaba ubuyohluka kakhulu kunalowo esiwaziyo. Kepha imuphi umsebenzi noma imisebenzi ayifeza ngqo?
Ukuheha impova
Kwesinye isikhathi, i-stamen iba yisakhiwo esikhonza ukuheha ukunaka kwabangaba impova, njengezimbali. Kepha kunzima ukuyibona, ngoba ayinakwa; Singathola nokuthi inamasaka impova ezansi kwawo.
Ikhiqiza impova
Impova uhlamvu olukhiqizwa ku-stamen oluqukethe imininingwane yofuzo yesitshalo esidala esivundile. Lapho nje ifinyelela ezimbalini zesifazane, ivundisa i-ovary bese imbewu iqala ukuvuthwa, ezokhula ingavikelekile esimweni sama-gymnosperms, noma nge-'gobolondo 'elincanyana noma elincanyana futhi elingazweli endabeni yama-angiosperms.
Ikhiqiza umpe
Uma lokhu kwenzeka, esikhundleni sokubizwa ngokuthi yi-stamen, kubizwa ngokuthi ama-staminal nectaries. Kodwa luyini umpe? Yisixazululo esingamanzi esine-ushukela, ama-amino acid, amaminerali ions nezinto ezinikeza iphunga elithile.. Izilwane eziningi ziyayithanda, into izitshalo eziyisebenzisayo ukuzenza zivakashele izimbali bese ziyayifaka impova.
Noma kunjalo, akufanele sidideke: ngaphambi kokuvela kwezilwane, sezivele zikhiqize umpe. Eqinisweni, kuyaziwa ukuthi lapho amaqabunga ekhula ngokushesha, adinga ubisi oluningi kunalapho evuthwa. Ngalesi sizathu, kukhona abaningi abanezindlala ezikhiqiza umpe ezingxenyeni ezingezona ezokuzala, njengamaqabunga.
Njengoba sibonile, i-stamen iyisakhiwo esibonakala silula, kepha ngaphandle kwayo impova ibingenakwenzeka. Kungakho kubaluleke kangaka.
Siyethemba ukuthi okufundile ngaye kube wusizo kuwe 🙂. Uma ubulokhu ufuna ukwazi okwengeziwe, lokhu kungakuthakazelisa:
