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SISTEM SOKONGAN TUMBUHAN

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by

amirah affandi

on 4 September 2014

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Transcript of SISTEM SOKONGAN TUMBUHAN

SISTEM SOKONGAN TUMBUHAN
AKAR SOKONG
AKAR JANGKANG
SULUR PAUT
DURI
KESEGAHAN SEL
KESIMPULAN
TUMBUHAN DARATAN
Tumbuhan berkayu

disokong oleh tisu-tisu berkayu
memberi bentuk & kekuatan kpd batang
contoh: pokok angsana, meranti, duit-duit,
struktur khas:
duri
akar banir
akar jangkang
akar cengkam
TUMBUHAN AKUATIK
KERATAN RENTAS BATANG POKOK TERATAI
SISTEM SOKONGAN TUMBUHAN AKUATIK
Contoh: teratai, hidrila, lembayung & kiambang
disokong oleh
daya apungan air
(ruang udara/kantung udara dalam daun/batang)
menjadikanya kurang tumpat & mudah terampai/terapung pada permukaan air
AKAR CENGKAM
AKAR BANIR
BATANG MELILIT
Tumbuhan herba/tak berkayu

disokong oleh tekanan segah/kesegahan sel
juga dibantu oleh struktur khas:
duri
sulur paut
batang melilit
akar sokong
akar cengkam

POKOK RU
POKOK MERANTI
ORKID
DUIT-DUIT
SIRIH
LADA HITAM
POKOK SERI PAGI
POKOK KACANG PANJANG
POKOK ANGGUR
Tumbuhan daratan mempunyai 2 jenis sistem sokongan:
tisu-tisu berkayu
struktur khas (akar banir, akar jangkang)
kesegahan sel (tekanan air)
struktur khas (sulur paut, batang melilit, akar sokong)
Tumbuhan akuatik pula di sokong oleh daya apungan air
struktur khas- ruang udara

Full transcript