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Summary Eenheid 6 Ondersteuning in Plante $3.38   Add to cart

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Summary Eenheid 6 Ondersteuning in Plante

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Verskeie bronne word gebruik vir 'n samevattende opsomming wat al die nodige inligting bevat, maar in 'n maklike verstaanbare taal en tot op die punt. Bronne sluit in Via Afrika, Antwoordreeks, Verken Lewenswetenskappe, Zoem, Ace it, Ken en Verstaan My opsommings is ideaal vir hersiening en eks...

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  • March 24, 2021
  • 6
  • 2019/2020
  • Summary
  • 200

1  review

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By: roelene • 3 year ago

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Ondersteuning in Plante
Dikotiele = tweesaadlobbige



1. Dikotiele Wortel
Hooffunksies:
- Absorbeer water en minerale soute uit grond
- Anker plant stewig in grond

Kenmerke:
1. Xileem in die vorm vann ‘n kruis gerangskik
2. Floeem kom tussen ‘bene’ van kruis voor
3. Duidelike endodermis
4. Wortelhare



Uitwendige bou (eksterne struktuur):
Bestaan uit 5 streke:
1. Wortelmus (beskerm groeipunt)
2. Meristematiese streek (vorm nuwe selle)
3. Verlengingstreek (nuwe selle word langer)
4. Wortelhaarstreek (vergroot absorbsie-oppervlak)
5. Volwasse streek (vergroot absorbsie-oppervlak, anker plant)



Inwendige bou (interne struktuur):
Bestaan uit 3 streke:
1. Epidermis
2. Korteks
3. Sentrale Silinder (stele)

, STREEK BESKRYWING TIPE WEEFSEL FUNKSIE
1.Epidermis - Enkellaag buitenste selle Epidermisselle - Absorbsie van water en
- Wortelhare aan punt -dig en dunwandig mineraalsoute
- Geen kutikula -wortelhare - Beskerm
binneweefsels
2.Korteks Bree band van weefsels Parenshiem - Verpakking
Onder epidermis -groot, rond, - Baan vir
dunwandige selle waterbeweging
-lugruimtes -Stoor stysel
-leukoplaste
Endodermis Gespesialiseerde Waterdigte laag stop
-Binnelaag van korteks parenchiem vloei van water
-Enkellaag selle (sommige het Verseker dat water slegs
waterdigte lag) na xileem beweeg
3.Stele Perisikel Meristematiese Verdeel om laterale (sy)
Net binne endodermis selle wortels te vorm
Dunwandig -klein, dig gepakte,
ongedifferensieerd
Kambium Meristematiese Verdeel om nog xileem-
Tussen xileem en floeem selle en floeem-weefsels te
Vaatweefsel Klein, dig gepakte, vorm
ongedifferensieerd
Vaatweefsel Xileemweefsel: Gelei water en
-hol, verleng, opgeloste mineraalsoute
Xileem: verhoute wande op na plant
Stervormige streek in - vorm buise
middel van wortel -vate en lugvate

Floeem: Floeemweefsel: Vervoer opgelsote
Kolle tussen arms van -sifbuise voedingstowwe in plant
xileem -verleng op en af
-groot vakuole
-stinge sitoplasma

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