Amakhonkco Annual - it cambium? isakhiwo fukntsii

Cambium - lilaphu, edulusele phakathi iinkuni kunye phloem. Ingaba Wayevela phi? It evukayo procambium - nemithambo iinyanda. Efumaneka neziqu, neengcambu izityalo.

Ekuqaleni, lo cambium izityalo ezifumaneka kuphela ezithungwini nemithambo. Olu hlobo kuthiwa zizithungu. Emva koko, lo izicwili yakha umaleko kwimitha medullary, amalungiselelo phakathi imiqadi. Olu hlobo beam kuthiwa cambium.

Lo maleko benza umqadi compound cambium, ekusekeni isangqa enye umaleko. Ngenxa ukukhula kwezityalo benza imiqadi ezintsha kunye namalungu yezihlunu ziqala ukukhula balo babulingana nesandla, kusenziwa umaleko olutsha kweenkuni. Nguwo lo msebenzi ungundoqo cambium. Zilahleka.

Xa cambium ebusika belele, ngoko lungenzeki ukukhula kwezityalo babulingana nesandla ngexesha kubanda. Ngenxa ezenzeka yomqeshi zesityalo kunye nexesha dormancy kwi amakhonkco ebusika yonyaka kwakheka.

Umsebenzi, isakhiwo

Cambium - lo laphu ebalulekileyo, ngaphandle apho ukukhula umthi Ebubanzini akwenzeki. zaso - prozenhimnye. Ukuba sibe side siphele bevelled. Ubude Prozenhimnyh lidlula ububanzi amaxesha iseli eziliqela. Kwimilo longitudinal cross-somhlathi yoxande uyabonakala.

Cambium - iiseli ukuba abe isakhiwo ezintsonkothileyo. Bona ibekwe ngaphakathi ngumongo, kukho icytoplasm kunye organelles. Eyona nto ingumnqa kukuba iintshukumo ezicothayo kwenzeka ukuba kukho icytoplasm. Isantya kuxhomekeka kwixesha lonyaka. Xa ngundoqo iseli elakha. Lubonakala ngumntu side. Iiseli badle isityalo egciniweyo izondlo. Bengena plasma iseli.

division

Lo mzuzu elandelayo. Cambium - iseli ekwaziyo yokwahlula. Le nkqubo ngenxa kukho icytoplasm.

Iiseli cambium bakwazi ukwabelana polar kuphela. Kwelinye icala elinye - zenze nezemithi, yaye kwelinye - amaxolo esityalo. ngokucandeka ezingeyomfuneko kwenzeka ngokungenamlinganiselo. Ngoko ke, umthi ixolo iqulathe ngaphantsi kwe kweenkuni. Ukuba division iseli waya ngokulungeleleneyo, emva ngokwahlula ixolo neenkuni kuya kuba inani elifanayo.

Ngexesha ukwahlulwa iseli enye ihlukane ezimbini. Emva koko omnye izinto ezintsha iba iseli umzali, kunye nezinye - kwakhona ahlulwe kwisiqingatha, sijike kwi phloem okanye umthi. Inguqulelo lokugqibela kuxhomekeke koko yinxalenye kwisityalo iiseli ezikufutshane ngaku.

Ngexesha kwisahlulo iinkuni ekufakwa ukuya embindini sebe. A ukhokho - ukuya elunxwemeni.

umsebenzi

Ke kaloku abanye amathuba. Akhiwe cambium stem wenza umsebenzi wokufundisa. Le amandla livela isakhiwo eyodwa umaleko. iiseli bakhe side kunye amaqokobhe ezingcakacileyo walhule nokukhula. Ngenxa kule Isiqu sityalo sikhula.

amakhonkco yonyaka

Wonke umntu uyazi ukuba imithi kufuneka amakhonkco zonyaka. On kubo uyakwazi ukubona iminyaka emininzi kwindlela isityalo. Kulo nyaka mnye isangqa kuyilwa, okt. E. ring yonyaka. It abunjwe cambium elinikeza ngokucandeka stem nokukhula ubukhulu.

Imithi ezikhulayo kwimozulu epholileyo, ukwahlula-hlulwa zaso iqala kwentwasahlobo iphela ekwindla. Ukuvuka phezulu, umthi iqala ukukhula ngenkuthalo. Ngeli xesha, i cambium uye iiseli ezinkulu, leyo ekupheleni ihlobo kuba emxinwa, kodwa kwiqokobhe zamafu. Ngenxa ukwahlukana ukuyilwa khonkcweni yonyaka. Ngenxa ubukhulu yayo kugwetywa ekukhuleni amaplanga ngonyaka ngamnye. ring nganye yonyaka ibandakanya ehlotyeni nasebusika umaleko. Bona azakubalulwa umbala: eliqaqambileyo - olu hlobo, kwaye kumnyama - ebusika.

Xa lidala iiseli cambium Ifomu iinkuni kunye amaxolo. Eyokuqala yenza umsebenzi ngekawusi up nentlaka - zokhuselo. La malungu zesityalo zenziwa ezithile iindidi iiseli. Ngexesha lokukhula element nganye uzalisekisa indima yayo ngqo kuphuhliso kwisityalo.

Ngokufutshane, cambium i inyama kubalulekile zezityalo. ukuba umane khange libekhona ngaphandle kwakhe.