hydathode

saadhaaranayaayi angiospermukalil kaanapedunna oru tharam sushiramaan hydathode, ithu epidermis allengil ila maarjinile sushirangaliloode vellam sravikkunnu, saadhaaranayaayi oru naamamaathramaaya pallinteyo sereshanteyo attathu. rananculus fluitans" polulla vellathinadiyilulla jalasasyangalude elakalilum "campanula rotandifolia" polulla varanda aavaasavyavasthakalile sasyasasyangalilum hydathodukal kaanapedunnu. avaa oru vascular bundle vazhi plaant vascular sisttavumaayi bandhippichirikkunnu. jalathile cheera, jalathile hayasint, rooss, baalsam thudangi niravadhi enangalil hydathodukal saadhaaranayaayi kaanapedunnu.
jalathal niracha niravadhi intercellulaar edangalulla oru koottam jeevakoshangalal nirmmicha hydathodukal, ennaal chloroplastukal kuravo illayo, koodaathe parishkkaricha bundle-endukale prathinidheekarikkunnu. eee koshangal ("eppithem cellukal" ennu vilikkunnu) onno athiladhikamo sub-epidermal arakalilekku thurakkunnu. iva, oru thuranna jalasthambhathiloodeyo thuranna sushirathiloodeyo purambhagavumaayi ashayavinimayam nadathunnu. jalasthambham gadanaaparamaayi oru saadhaaranasthambhavumaayi saamyamullathaanenkilum saadhaaranayaayi valuthaanu, chalanaseshi nashtappettu. 
hydathodukal gatteshan prakriyayil earppedunnu, athil positteev sailam marddam (root marddam kaaranam) sushirangalil ninnu draavakam puranthallaan kaaranamaakunnu. chila haalofaittukalil grandhikal adangiya tricomukal undu, avaa cytotoxic ajaiva ayonukalude saandrata kuraykkunnathinu sajeevamaayi uppu sravikkunnu; ithu ilayude uparithalathil oru velutha podi padaarthatthinte roopeekaranathilekku nayichekkaam.
hydathodukal rund tharatthilunda

