Uyini cambium ezihlahleni?

Isikhathi esining impela kukhona izihlahla nezitshalo herbaceous ngemiboko besiyoba sikhulu futhi neziqu. Kungani izihlahla zikhule ngobubanzi? Uyini cambium, ukufunda lesi sihloko.

cambium

Uyini lo cambium? Lokhu ungqimba elincanyana kakhulu izicubu ezemfundo, isb amangqamuzana aphilayo bayakwazi ukuhlukanisa futhi sikhule ukujiya. Umphumela wale izinqubo Ukwakheka kwezitho ukhuni amaseli bese phloem. Ngo ukuthuthukiswa kwe-cambium kubeka amaseli Bast ngaphandle nezinkuni - ngaphakathi. Itholakala ngaphansi amagxolo.

Uyini cambium, futhi lapho kuba khona etholakala? Lawa amaseli lendwangu zemfundo. Esikhathini ungqimba engaphezulu komunye nomunye nakubo isihlobo ukuba umgqomo - phakathi ukhuni amagxolo. Uma isimo sezulu sifudumele ebusika zilimaze cambium, futhi entwasahlobo - umsebenzi wayo is yaphinde yaqhubeka. Okokuqala, ivusa ezingxenyeni ezincane somuthi, bese - ku emidala.

Isakhiwo cambium amaseli

Uyini cambium, futhi yini isakhiwo amaseli yayo? Kuyinto encane, side ukuma tetrahedral. Emikhawulweni maseli tapered. Ubude kungaba ezahlukene: e dicotyledons - isigamu milimitha, kusukela gymnosperms - amamilimitha angu emithathu nengxenye. Iseli ligcwele plasma ezinabantu luyimbudumbudu ne-nucleus othini lokuphotha emise maphakathi. Ngezinye izikhathi liqukethe isitashi. I bezinhlamvu akuyona elukhuni, soft futhi nezimo. Kodwa ebusika izindonga zawo ukushwaqa. Amaseli nge ncazelo ifomu kusukela izingqimba eyodwa kuya kwemithathu, kodwa lokhu kubhekwa cambium ungqimba elilodwa ukufulela.

Njengoba kwakheka cambium is?

Siqukethe amaseli komama: longitudinal, lafinyelela ubude amamilimitha angu eziningana nokuba semikhawulweni bevelled, futhi osabalalayo short, okuyinto zihlelwe e umnyombo futhi sidlule imisebe ngokusebenzisa cambium.

Uyini izingqimba cambium lamaseli futhi aqukethe kangakanani? Kokunye kuphela ungqimba kwamaseli cambium, okuyinto ipuleti cell indawo uchungechunge cambial. La mangqamuzana zifana kakhulu amaseli kwezinye izingqimba, ngakho-ke abakwazi okumelwe ahlukaniswe. Nokho, ukwakha amaseli cambium zihlukile kulabo labakhona babelane ngaphansi evumayo izimo zezulu.

Waba yini umphumela wesibindi ngokomthetho ekuthuthukiseni ukhuni izinqubo Ukwakheka esingaguquguquki cambium amaseli kwamanye amaseli izinjongo ezihlukahlukene. Lena inhlangano enhle kakhulu. amaseli Elingumakhelwane kufanele ukuxhumana nomunye, ngoba ukukhiqiza uhlobo yabo entsha cell ngesikhathi esithile. Cambium uhlala kuze kwesihlahla uyaphila.

Breeding, cambium ngqamuzana liyahlukana e ezimbili. Omunye cell kuyinto mncane-ngodonga, itholakala ngaphandle umgqomo, kanye nezinye - elukhuni, nezindonga awugqinsi, iya ekujuleni kwenhliziyo. iseli Olubanzi kokuba igobolondo mncane, yakha cambium entwasahlobo. Ngakho-ke, izinkuni kulesi sikhathi sonyaka ibizwa entwasahlobo. Ngo yokukhula, cambium lapho amaqabunga asathuthuka futhi amahlumela akhiwa isicaba amaseli enezindonga obukhulu. Izinkuni ngokuthi ehlobo kwakhiwa ngalesi sikhathi. Phakathi yokukhula ifomu isizini izindandatho yonyaka, okuyinto angakwazi ukuhlonza yobudala esihlahleni.

Isakhiwo ingaphakathi stem

izitshalo herbaceous nemithi babe isakhiwo ngokungalingani le ngxenye stem. Uyini lo cambium ezihlahleni? izitshalo Dicotyledonous babe indwangu ezemfundo, ngokuthi cambium, lapho zikhula e ukujiya. Isibonelo izihlahla ezifana Maple, lime nabanye. Ngo izitshalo, monocots cambium akuyona, ngakho ukushuba cishe ukhulise.

Bok dicots yakha izingqimba eyindilinga: izinkuni, cambium, phloem. Ophakathi nendawo umnyombo stem cells okuyinto ukwenza njenge ekuqongeleleni umsoco. Amaseli wesabelo core neuropathy lincane, futhi izindonga zawo - obukhulu.

Izinkuni iyona yangaphandle core ingxenye. Imikhumbi izindlela. Ngokusho kwakhe engena emanzini ukuze amaqabunga ukuncela izimpande zawo. Kanye kwesihlahla amanzi uthola wonke umsoco. Ukhuni luqukethe izicubu ngokuthi le micu izinkuni. Ngenxa isiqu sabo has ngokuqina. Indwangu eyinhloko parenchyma izinkuni. Kuyinto unesibopho replenishment amasheya ukudla.

Cambium monocots futhi dicots

Uyini cambium ezitshalweni? Ngo monocots Flora sekuyahwalala khona. procambium Iyatholakala uphendulela in primary Indwangu conductive. izitshalo Dicotyledonous labo abazokwazi ukwakha procambium cambium, futhi isishiya secondary uya khona kwezicubu conductive. Ngenxa yalokho - ukwakheka yesibili stem isakhiwo.

Uyini cambium ezitshalweni? Photo: bona okulandelako. Cambium ka herbaceous neziqu zezitshalo dicotyledonous ine umsebenzi isikhathi umuntu okhula. Uma kufika ikwindla, amaseli ayo abe izicubu unomphela. Cambium neziqu zezitshalo bok has umsebenzi zonke izinsuku zokuhamba kwakhe, + yaze yafa isihlahla kwakhe. Kodwa ebusika kanye autumn ngoba cambium iqala inkathi lokuphumula.

dicots herbaceous: anatomy stem

Isakhiwo yokwakheka izitshalo ngokuya kwesakhiwo kuyinto zamabanga aphansi naphezulu. Kumiswa isakhiwo eyinhloko kwenzeka ngendlela efanele usaqala yentuthuko stem.

Kodwa ngokushesha ihamba ku esigabeni sesibili, njengoba cambium ngalesi sikhathi liqala umsebenzi wayo. isakhiwo sesibili libhekene ezintathu izinhlobo: Beam, soguquko nonbeam.

Puchkova isakhiwo izitshalo

Libhekene ebeka imishayo cambium ahlukene zazo achithayo ngonyaka ngeziqu emgceni umbuthano. Ukwakheka okuqhubekayo cambial indandatho ebe egcina sakhiwo semishayo. Le nqubo obulandela kumiswa cambium interfascicular ngokuhlanganyela iringi eyinhloko ezakhiwe ugodo lapho, is. Ngezinye izikhathi Beam cambium ongacaciswanga kahle, okungadingi ngokucacile ukuhlukanisa esiyinhloko kusukela isakhiwo yesibili.

isakhiwo Nonbeam izitshalo

Libhekene e ukuthi, kungakhathaliseki isakhiwo eyinhloko stem, ngaphansi kwethonya izinguquko yesibili ungakheka isitshalo isakhiwo esifanayo: okuvame cambium indandatho.

Isakhiwo yokwakheka yonyaka neziqu zezihlahla nezimila herbaceous uthanda: conductive kuyizinhlayiyana ugongolo uhlelo ayinakho isakhiwo. sici yabo esiwuphawu iyona ekwakhekeni kwezicubu enamathela ngenxa ye ukuvivinya we cambium.

Lapho cambium iqala ukusebenza kwawo, e ngeziqu izici ezihlukahlukene kwakhiwa imvelaphi yesibili, okuholela ekungeneni kakhulu ukunyamalala kancane kancane eyinhloko. Uyini cambium ufuzo? Ehunyushiwe Sisuka olimini lwesiLatin, kuba exchange lamaseli isiqu sama isitshalo phakathi phloem nezinkuni.

Xylem (ukhuni) kanye phloem (phloem) kwakheka cambium isikhathi akufani, kuphumele ingxenyenamba mass amagatsha xylem futhi isiqu, futhi encane phloem - amagxolo, ungqimba yayo mncane. sokusabalalisa okunjalo kwamaseli yingoba ingqamuzana eyodwa ukusatshalaliswa sifana Bast ngaphezulu ukhuni amaseli. Ngakho mina isiyalele cambium.