Phloem - menene wannan? Aiki, tsarin phloem, xylem Ba kamar

Phloem - shi ne na musamman irin na shuka nama. A Girkanci harshe ajalin nufin "haushi". Kamar yadda shi ne sau da yawa kira phloem. Phloem - masana'anta ta hanyar abin da canja wuri na gina jiki ga shuka gabobin. Mene ne tsarin shi ne? Ta yaya ne kai na gina jiki? Mene ne daban-daban daga xylem?

Gudanar da kyallen takarda shuke-shuke: xylem da phloem

Domin kai na ma'adanai da kuma ruwa zuwa sassa daban daban na shuka dole conductive masana'anta. Ya kunshi iri biyu hadaddun kyallen takarda - phloem da xylem.

Xylitol ma kira itace da phloem - Duk da haka dai. Suna kullum located a kusa da kusanci da juna da kuma samar da wata conductive bim (wanda kuma ake kira jijiyoyin bugun gini fibrous). By juna tsari na xylem da phloem emit dama iri conductive yadudduka:

1. Kollaterialnye (nama dab da juna da kuma located equidistant daga axial ɓangare na shuka jiki).
2. Bikollaterialnye (xylem kewaye da phloem rabo biyu).
3. Concentric (idan xylem na kewaye da phloem da kuma mataimakin versa).
4. Aman (a lokacin da phloem da xylem na radius auku striping).

A tsarin da phloem

shuka phloem - musamman irin conductive masana'anta, wadda ake bukata don aika da gina jiki, da kafa a sakamakon photosynthesis, da gabobin da shuka, inda suka yi amfani. By irin asalin ne zuwa kashi da wadannan iri:

• farko (bambanci na procambium).
• sakandare (kafa na cambium).

Su Babban bambancin shi ne cewa a cikin primary phloem mãsu fakowa zuciya-dimbin yawa tube. Duk da haka, su salula abun da ke ciki shi ne m.

Phloem kunshi wadannan cell iri:

• sieve (samar farko canja wuri da kuma jamiái da wani cell nuclei).
• sclerenchyma (bauta, don tallafa).
• parenchymal (aiki a matsayin low radial kai).

Babban siffa daga cikin sieve Kwayoyin - gaban musamman pores a cikin cell ganuwar. Su asalin shi ne har yanzu m. A tashoshi suna sahu tare da callose sieve abubuwa (polysaccharide), wanda zai iya tara a gare su. Callose iya occlude da tashoshi na Kwayoyin, misali, a lokacin da shuka ne a wani zama shimfida lokaci a hunturu.

phloem kai

Phloem - a masana'anta, wanda aka koma da mayar da hankali mafita na hydrocarbons (kagaggun sucrose) kafa a sakamakon photosynthesis. Bugu da kari, da canjawa wuri assimilates da metabolites, amma a ƙananan yawa. taro canja wuri kudi kai da dama dubun santimita awa.

Canja wurin abubuwa ne da za'ayi da gabobin inda gina jiki suna rayayye kafa, to sassa na shuke-shuke, inda suke amfani da ko kara haja. Aiki abubuwa suna canjawa wuri zuwa Tushen, harbe, ganye kunno kai, haihuwa gabobin, tubers, kwararan fitila, rhizomes.

A sakamakon gwaje-gwajen, da masu bincike gano cewa kai ne da za'ayi ta bayarwa hukumomin wadanda sassa na shuke-shuke da suke kusa da su. Bugu da kari, da canja wurin da abubuwa ne dangantakar. Saboda haka, da shuka a daban-daban lokaci na girma kakar iya tara gina jiki ko ciyar da su.

Phloem: aiki

Photosynthesis auku a cikin chloroplast na ganye, tare da sa hannu na hasken rana. Its kayayyakin, ruwa da sauran mafita daga ma'adanai tunawa da tushen da shuke-shuke da cikakken zama dole ga aiki na duk Kwayoyin. Phloem - shi ne mai masana'anta da samar da su translocation. Turmi kwarara daga sieve abubuwa daga yankunan da high hydrostatic matsa lamba ga yankunan da ta low darajar. Saboda haka, babban aiki na phloem - da kai.

Ba kamar da xylem daga phloem

Duk da cewa da xylem da phloem yi kama da ayyuka da kuma ne a kusa da kusanci, suna da bambance-bambance. Motsi a xylem abubuwa samu daga tushen da ganye. Bugu da ƙari, cikin Kwayoyin constituting irin wannan masana'anta ne jijiyoyin bugun gini abubuwa, tracheids, zaruruwa da kuma itace parenchyma. Xylem wajibi ne ga canja wuri da ruwa tare da narkar da na gina jiki.

Saboda haka phloem - shi ne mai irin jijiyoyin bugun gini nama da shuka. Yana hidima don canja wurin gina jiki daga gabobin da shuka, inda suka kafa wani aiki a cikin wadanda sassa inda suka ba an kiyayeshi ko cinyewa. Phloem kunshi uku cell iri - sieve, sclerenchyma da parenchymal. Babban sufuri aiki sieve Kwayoyin aiki tare musamman pores da ba su da nuclei.

Transfer na abubuwa za a iya za'ayi a biyu kwatance, kuma ta gudu wani lokacin kai da dama dubun santimita awa. Wani conductive masana'anta, irin wannan, a yi aiki da phloem, xylem ne. Amma su Babban bambancin ta'allaka ne da cewa xylem transports kawai daya shugabanci (daga tushen harbe) ruwa tare da narkar da ma'adanai.