Nws yog tsim los ntawm feem ntau ntawm tuag hlwb thiab yog tsim los ntawm ntau txheej txheej ntawm suberized periderm, cortical thiab phloem ntaub so ntswg. Lub rhytidome yog tshwj xeeb tshaj yog zoo tsim nyob rau hauv cov laus stems thiab keeb kwm ntawm cov ntoo. Nyob rau hauv cov nroj tsuag, cov tawv ntoo hlob sai sai thiab tuab rhytidome accumulates.
tsob ntoo ntoo yog dab tsi?
Nyob rau hauv botany, cov tawv ntoo yog txheej txheej ntawm cov stems thiab cov hauv paus hniav ntawm cov ntoo ntoo, tshwj xeeb tshaj yog cov ntoo. Nws peb lub ntsiab tseem ceeb yog (1) periderm, (2) cortex, thiab (3) phloem. Lub periderm yog txheej ntawm cov tawv ntoo uas raug rau ib puag ncig. Nws yog tsim los ntawm lub cork, lub cork cambium, thiab phelloderm
Yuav ua li cas yog cov khoom ntawm cov tawv ntoo?
Cov tawv tawv mos, los yog bast, yog tsim los ntawm vascular cambium; nws muaj cov ntaub so ntswg phloemuas nws cov txheej sab hauv tshaj xa zaub mov los ntawm nplooj mus rau lwm cov nroj tsuag. Cov tawv tawv sab nrauv, uas feem ntau yog cov ntaub so ntswg tuag, yog cov khoom ntawm cork cambium (phellogen).
tsob ntoo ntoo yog dab tsi?
Lub sij hawm ntoo tawv yog hais txog cov ntaub so ntswg sab nraum lub vascular cambiumCov tawv ntoo sab hauv yog tsim los ntawm cov phloem theem nrab, uas feem ntau tseem ua haujlwm hauv kev thauj mus los tsuas yog ib xyoos xwb. … Tag nrho cov ntaub so ntswg sab nraum lub cork cambium tsim cov tawv tawv sab nrauv, suav nrog cov phloem thiab cork hlwb uas tsis ua haujlwm.
Zoo yog tawv tawv Yuav ua li cas tawv ntoo?
Kev tsim cov tawv ntoo:
Cov tawv ntoo yog qhov npog sab nraud ntawm cov qia thiab cov hauv paus hniav ntawm cov nroj tsuag qub. Lub bark yog tiv thaiv npog ntawm tsob ntoo ceg, trunks, thiab keeb kwm. Cov tawv ntoo yog tsim vim ntawm kev loj hlob theem nrab hauv cov nroj tsuag (i) Vim muaj cov suberin nyob rau hauv cov phab ntsa ntawm cov cell dej tsis tuaj yeem nkag mus rau hauv lawv.
