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TAIMERAKK Kristel Mäekask
Rakukest Koosneb peamiselt tselluloosist, ligniinist, pektiinist. ,[object Object],[object Object],[object Object],Eriti paks rakukest on kivisrakkudel (pähklitel, kirsi seemnel). Rakkude vananemisel rakukest korgistub või puitub.
Vakuool ,[object Object],[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object]
Plastiidid proplastiid leukoplast kloroplast kromoplast Kahemembraansed organellid. Proplastiidid on plastiidide eellased.
Kloroplastid Kloroplastide põhifunktsioon on  fotosüntees . Täidetud valgulise vesilahusega –  stroomaga , milles leidub DNA ja RNA rõngasmolekule ning ribosoome. Stroomas on lamedad membraansed kotikesed –  lamellid . Lamellides esined roheline värvaine –  klorofüll .
Kromoplastid ,[object Object],[object Object],[object Object]
Leukoplastid Varuainete talletamine, nt tärklis koguneb amüloplastidesse.  Leukoplastid on värvuseta.
Plastiidide üleminek kloroplast     kromoplastiks viljade valmimisel, enne lehtede langemist (karotinoidid taluvad madalamat temperatuuri kui klorofüll). kromoplast     kloroplastiks porgandi säilitusjuur muutub roheliseks kloroplast    leukoplastiks kui roheline taim satub pimedusse
Golgi kompleks vakuool leukoplast mitokonder rakukest plasma-membraan kloroplast ER tuum tuumake poorid
Golgi kompleks mitokonder lüsosoom tuum ribosoom kareda-pinnaline ER sileda-pinnaline ER kloroplast tsütoplasma raku-membraan vakuool rakukest
Kasutatud materjal: ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

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