Pom suberin nyob qhov twg?

Cov txheej txheem:

Pom suberin nyob qhov twg?
Pom suberin nyob qhov twg?

Video: Pom suberin nyob qhov twg?

Video: Pom suberin nyob qhov twg?
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Anonim

Suberin yog lipophilic macromolecule pom nyob rau hauv tshwj xeeb cog cell phab ntsa, qhov twg los yog kev tiv thaiv rau ib puag ncig yog xav tau. Suberized hlwb tsim cov periderm, cov ntaub so ntswg uas envelops theem nrab stems raws li ib feem ntawm cov tawv ntoo, thiab loj hlob raws li cov ntaub so ntswg tom qab mob los yog nplooj abscission.

suberin nyob rau hauv cov nroj tsuag nyob qhov twg?

Suberin pom nyob rau hauv txheej phellem ntawm periderm (los yog cork). Qhov no yog txheej txheej ntawm cov tawv ntoo. Cov hlwb hauv cov txheej no tuag thiab muaj ntau nyob rau hauv suberin, tiv thaiv dej los ntawm cov ntaub so ntswg hauv qab no. Suberin kuj tuaj yeem pom nyob rau hauv ntau lwm cov nroj tsuag.

Suberin Class 9 yog dab tsi?

Suberin yog a wax zoo li fatty substance. Suberin yog hydrophobic heev thiab nws tiv thaiv dej los ntawm kev nkag mus rau cov ntaub so ntswg. Suberin muaj nyob rau hauv lub cell phab ntsa ntawm cork hlwb. Nws ua rau cov hlwb impervious rau gases thiab dej.

pom suberin nyob qhov twg thiab vim li cas?

Suberin yog ib qho cell phab ntsa-txuas biopolymer pom nyob rau hauv cov xov tooj tshwj xeeb, xws li hauv paus epidermis, hauv paus endodermis (xws li Casparian band), pob sheath cells thiab periderm (cork) ntawm cov ntoo thiab cov kab mob hauv av (piv txwv li, tubers).

Cutin pom nyob qhov twg?

Cutin, uas yog tsim los ntawm hydroxy thiab epoxy fatty acids, tshwm sim ntawm yuav luag txhua qhov chaw saum huab cua ntawm cov nroj tsuag, suav nrog stems (tshwj tsis yog cov tawv ntoo), nplooj, paj, txiv hmab txiv ntoo., thiab cov tsho tiv no.

Pom zoo: