Umfanekiso - Wikimedia / LadyofHats
IHypocotyl yinxalenye ebalulekileyo yembewu, kwaye ke ngenxa yesityalo esizayo. Nangona incinci kakhulu, idlala indima ebalulekileyo kuphuhliso nokukhula kwesityalo.
Ngaphandle kwamathandabuzo, yinto yobugcisa yendaleko, enkosi apho kukho inani elikhulu leentlobo zemithi, iintende, iintyatyambo, ngamafutshane, zizityalo.
Yintoni i-hypocotyl kwaye yintoni umsebenzi wayo?
Njengoko uyazi, zininzi iintlobo zeziqhamo: ezinye ziyinyama, ezinye zomile, ezinye zinokuba nobunzima obungaphezulu kwe-1 yeekhilo kwaye ezinye zingagqithi kwigram. Ewe, nangona zonke zahlukile, zinempawu ezifanayo kwaye enye yeembewu zazo yi-hypocotyl.
Xa iqanda lifakwa kwisichumiso kwaye iiseli zalo ziqala ukwahlula ngokukhawuleza zenze umbungu wesityalo esizayo, i-radicle ivela kwi-hypocotylOko kukuthi, ingcambu yokuqala umsebenzi wayo kukuqalisa ukufunxa amanzi kunye nezondlo emhlabeni. Ukwenza oku, iya kukhula ibheke ezantsi, oko kukuthi, ukungena emhlabeni; Ngale ndlela, isityalo siya kuba nakho ukuzondla, into ebaluleke kakhulu ngakumbi emva kokuwa kwe iimvumba (amagqabi akudala), kuba ezi zinto zibeka indawo yokugcina ukutya yalo naluphi na uhlobo, kwaye ke yeyokuqala ukusetyenziswa.
Kwelinye icala, le hypocotyl ajike abe sisiqu, eya kuthi ngokubanzi ikhule nkqo, kwaye kwiincopho zayo amagqabi aya kuvela.
Nguwuphi umahluko phakathi kwehypocotyl kunye neepicotyl?
Umfanekiso -Wikimedia / Begoon
El hypocotyl Sisikhondo esiphakathi kweetyotyombe kunye nesixwexwe, yiyo loo nto sigcina izityalo zimile. Ukongeza, njengoko ixesha lihamba, ihlala itshintsha umbala kunye / okanye iguqule isiqu somthi.
Kodwa uthini nge epicotyl? Eli gama libhekisa kwisiqu esiphakathi kwee-cotyledons kunye namagqabi okuqala ayinyani, ihlala ihlala iluhlaza kwaye ibhetyebhetye ngakumbi kune-hypocotyl. Ngamanye amagama, zombini zizikhondo, kodwa zibambe iindawo ezahlukeneyo.
Uyintoni umahluko phakathi kwembewu ye-epigeal kunye ne-hypogeal?
Kuxhomekeka kuhlobo lokuhluma, sikwahlula imbewu ye-epigeal kunye ne-hypogeal, eneempawu ezi:
- Epigean: kuzo, i-hypocotyl ikhula inyukele phezulu, kwaye kuyo kuvela ii-cotyledon eziza kuba noxanduva lokugcina isithombo somoya sine-oxygen de amagqabi okwenyani ahlume, njengoko kwenzeka kwizityalo ezininzi, ezinjenge lettuce, itswele, iimbotyi, njl.
- Hypogea: imbewu ye-hypogeal zezo zikhula kuzo i-epicotyl, ishiya ii-cotyledons zingcwatyiwe kunye ne-plumule, eyinxalenye yesisu esisiba sisiqu esingananto. Njengoko i-epicotyl iyolula, amagqabi okwenyani okuqala avela njengoko avela kwi-ertyisi okanye iisiriyeli umzekelo.
Siyathemba ukuba uyifumene inika umdla.
Enkosi kakhulu ngolwazi, ingcaciso entle kakhulu?
Enkosi ngamazwi akho, uEvelia 🙂