Mene ne cambium a itatuwa?

Very sau da yawa akwai itatuwa da kuma herbaceous shuke-shuke da ƙato kututturan kuma mai tushe. Me ya sa itatuwa girma a fadin? Mene ne cambium, karanta labarin.

cambium

Mene ne cikin cambium? Wannan sosai bakin ciki Layer da nama ilimi, Ina nufin rayayyun tantani da suke iya raba da girma a cikin kauri. A sakamakon wadannan matakai ne da samuwar itace Kwayoyin da phloem. A ci gaba da cambium kayansa mãsu Bast Kwayoyin a kan waje da kuma itace - ciki. An located karkashin haushi.

Mene ne cambium, da kuma inda ake da shi located? Waɗannan su ne sel da ilimi masana'anta. A Layer located sama da juna da kuma dangi zuwa ganga - tsakanin itace da haushi. A temperate canjin yanayin da a lokacin hunturu freezes da cambium, da kuma a cikin spring - ta aiki da aka koma. Na farko, ya awakens a cikin matasa sassa na itace, sa'an nan - a cikin tsofaffin.

A tsarin da cambium Kwayoyin

Mene ne cambium, da kuma abin da yake cikin tsarin da ta Kwayoyin? Shi ne kananan, elongated tetrahedral siffar. A iyakar da Kwayoyin suna Tapered. A tsawon iya zama daban-daban: a dicotyledons - rabin millimeter, daga gymnosperms - uku da rabi millimeters. The salula mai cike da densely granular jini tare da dogara sanda-dimbin yawa tsakiya a cibiyar. Wani lokaci yana kunshe da sitaci. A casing ne ba m, taushi da kuma sosai m. Amma a cikin hunturu da ganuwar thicken. Sel da irin wannan bayanin fom daga daya zuwa uku yadudduka, amma wannan yana dauke cambium Layer na daya yin rufi.

Kamar yadda cambium aka kafa?

Ya kunshi masu juna biyu Kwayoyin: tsaye, kai wani tsawon dama millimeters da ciwon bevelled iyakar, da kuma gajeren radial, wanda aka harhada a cikin zuciyar da haskoki ratsa cikin cambium.

Mene ne cambium yadudduka na sel da kuma yadda yake dauke da? A daya kawai Layer na cambium Kwayoyin, wanda shi ne mai cell farantin jerin cambial zone. Wadannan Kwayoyin suna da kama da sel da sauran yadudduka, don haka ba za su iya ba za a bambanta. Duk da haka, kafa da cambium Kwayoyin ne quite daban-daban da wadanda suke iya sake rabo a karkashin m weather yanayi.

A sakamakon kayyade itace ci gaban tafiyar matakai ne m samuwar cambium Kwayoyin zuwa wasu Kwayoyin domin dalilai daban-daban. Wannan ne mai matukar lafiya kungiyar. Makwabta Kwayoyin suna da don sadarwa tare da juna, domin su samar da sabon nau'in kwayar halitta, a kuma wani lokaci. Cambium zaune har da itacen da yake da rai.

Kiwo, cambium cell ya raba biyu. Daya cell ne na bakin ciki-walled, an located a waje da ganga, da sauran - m, tare da m ganuwar, ke da cibiya. M cell da ciwon bakin ciki harsashi, Forms spring cambium. Saboda haka, itace wannan lokaci na shekara ne da ake kira spring. A cikin girma kakar, a lokacin da masu tasowa ganye da kuma harbe ake kafa cambium mĩƙe Kwayoyin tare da m ganuwar. Itace kira bazara kafa a wannan lokacin. A lokacin da girma kakar form shekara-shekara zobba, wanda zai iya sanin ko yana da shekaru na itace.

A tsarin da ciki na kara

Herbaceous shuke-shuke da bishiyoyi da wani unequal tsarin wannan ɓangare na kara. Mene ne cikin cambium a itatuwa? Dicotyledonous shuke-shuke da wani ilimi masana'anta, kira cambium, ta hanyar abin da suke girma cikin kauri. An misali ne itatuwa kamar Maple, lemun tsami da sauransu. A shuke-shuke, monocots cambium ba, don haka da kauri ne kusan ba ya karu.

Woody dicots samar concentric yadudduka: itace, cambium, phloem. A cibiyar ne ainihin kara Kwayoyin wanda aiki a matsayin jari na gina jiki. Kwayoyin na gefe core rabo ne karami, kuma su ganuwar - m.

Wood ne m core rabo. Tasoshin ne tafarkin da. A cewar shi shiga cikin ruwa da ganye da kuma sha daga tushen sa. Tare da ruwan itace samun duk gina jiki. Wood ya ƙunshi nama kira da itacen zaruruwa. Saboda su akwati yana da karko. Babban masana'anta ne itace parenchyma. Shi ne ke da alhakin ƙari abinci hannun jari.

Cambium monocots da dicots

Mene ne cambium a tsire-tsire? A monocots Flora shi ne kusan a can. Samuwa procambium jũya a cikin primary conductive masana'anta. Dicotyledonous tsire-tsire masu iya kafa procambium cambium, bada Yunƙurin zuwa sakandare manufa conductive kyallen takarda. A sakamakon - samuwar da sakandare kara tsarin.

Mene ne cambium a tsire-tsire? Photo: gani a kasa. Cambium na herbaceous mai tushe na dicotyledonous shuke-shuke yana da wani aiki na daya girma lokaci. Da zarar kaka zo, ta Kwayoyin zama dindindin nama. Cambium tushe na woody shuke-shuke yana da aiki duk rayuwarsa, har ya mutu itace. Amma a cikin hunturu da kuma kaka ga cambium fara wani lokaci na sauran.

Herbaceous dicots: ilimin halittàr jiki da kara

A ilimin Halittar Jiki tsarin shuke-shuke a cikin tsarin sharuddan ne firamare da kuma sakandare. Formation na primary tsarin ya auku a wani wuri mataki na ci gaba da kara.

Amma shi hanzari motsa a cikin sakandare mataki, a matsayin cambium a wannan lokacin ta fara faduwa aiki. Secondary tsarin ne halin da iri uku: Beam, tsaka da nonbeam.

Puchkova tsarin shuke-shuke

Halin da kwanciya da cambium raba bim wanda aka zubar a tushe a jere a kan wani da'irar. A samuwar wani m cambial zobe yayin da rike da katako tsarin. Wannan tsari ya biyo baya samuwar interfascicular cambium wanda, a tare da tare da primary zobe da aka kafa ta a masaƙa. Wani lokaci Beam cambium talauci a tsare, wanda ba a fili rarrabe farko daga sakandare tsarin.

Nonbeam tsarin shuke-shuke

Halin da cewa, ko da kuwa da farko tsarin da kara, a ƙarƙashin rinjayar sakandare canje-canje iya samar da wata shuka da wannan tsarin: da na kowa cambium zobe.

A ilimin Halittar Jiki tsarin shekara-shekara mai tushe daga itãce, kuma herbaceous shuke-shuke son: conductive barbashi katako tsarin yana da wani tsari. Su bayãnin hukuncin alama ne da samuwar wani shafi nama a sakamakon da ƙwazo aiki na cambium.

Lokacin da cambium farawa da aiki, a cikin tushe da daban-daban abubuwa kafa sakandare asalin, abu don karɓa mai bacewar na farko. Mene ne cambium na ilmin halitta? Fassara daga Latin, shi ne musayar Kwayoyin a kara da shuka tsakanin phloem kuma itace.

Xylem (itace) da kuma phloem (phloem) kafa cambium lokaci ne ba iri daya ba, sakamakon wani taro sulusi da murabba'i na xylem rassan da akwati, da kuma sulusi da murabba'i na phloem - haushi, kuma ta bakin ciki Layer. Irin wannan rarraba da Kwayoyin ne saboda guda cell a rarraba yayi dace da Bast mafi itace Kwayoyin. Saboda haka na yi oda da cambium.