Ppt 1. gerak tumbuhan by :Henie , S.Pd.
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Transcript of Ppt 1. gerak tumbuhan by :Henie , S.Pd.
![Page 1: Ppt 1. gerak tumbuhan by :Henie , S.Pd.](https://reader038.fdocuments.net/reader038/viewer/2022102504/55a0d0721a28ab3b108b45a1/html5/thumbnails/1.jpg)
“Manusia dan hewan memiliki perilaku gerak yang tidak jauh berbeda.
Manusia dan hewan sama-sama bisa berjalan dan menunjukkan gerakan-gerakan yang mudah
diamati.
Namun bagaimana dengan gerak pada tumbuhan?
Bagian apa saja dari tumbuhan yang dapatbergerak ?”
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Amati GambarBerikut !!!
Gbr. 1.1. Burung Terbang
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Created By : Henie , S.Pd.
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SUB TOPIK BAB I
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TUJUAN PEMBELAJARAN
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Amati GambarBerikut !!!
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GERAK PADA TUMBUHAN
GERAK HIGROKOSPIS GERAK ESIONOM
NASTI TROPISME TAKSIS
1. MENUTUPNYA DAUN PUTRI MALU
(NIKTINASTI)
2. MENUTUPNYA DAUN VENUS
(SEISMONASTI)
3. MENUTUPNYA DAUN MAJEMUK
KARENA MALAM(NIKTINASTI)
4. MEKARNYA BUNGA PUKUL 4
(FOTONASTI)
5. MEMBUKA DAN MENUTUPNYA
STOMATA
( NASTI KOMPLEKS)
1. GERAK BATANG KEARAH
CAHAYA
(FOTO TROPISME)
2. GERAK AKAR KEDALAM
PUSAT BUMI
(GEOTROPISME)
3. MEMBELITNYA UJUNG
BATANG PADA SULUR
TANAMAN
( TIGMOTROPISME)
4. GERAK AKAR MENUJU
TEMPAT YANG BERAIR
(HIDROTROPISME)
1. GERAK
KLOROPLAS
KEARAH
CAHAYA
2. GERAK
SPERMA
MENUJU SEL
TELUR
ENDONOM
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TROPISME
GERAK TUMBUHAN SEBAGAI AKIBAT PENGARUH RANGSANG DARI LUAR
ARAH GERAK DIPENGARUHI DATANGNYA ARAH RANGSANG
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AKAR KE PUSAT GRAVITASI
GEOTROPISME
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KACANG YANG SUDAH TUA AKAN MECAH SENDIRI
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GERAK HIGROKOSPIS
GERAK TUMBUHAN AKIBAT PERUBAHAN KADAR AIR
CONTOH :
1. PECAHNYA KULIT POLONG-POLONGAN
2. KEMBANG MERAK
3. KACANG BUNCIS
4. MEMBUKANYA KOTAK SPORA
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BIJI POLONG-POLONGAN
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GERAK ESIONOM
GERAK YANG DIPENGARUHI OLEH RANGSANG DARI LUAR
1. CAHAYA
2. SENTUHAN
3. SUHU
4. AIR
5. GRAVITASI BUMI
6. ZAT KIMIA
7. DST
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Gerak yang terjadi secara spontan dan tidak diketahui
penyebabnya atau tidak memerlukan rangsangan dari
luar , diduga rangsangan gerak endonom berasal dari
dalam tubuh tumbuhan itu sendiri
Gerak Endonom
CONTOHNYA
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GERAK ENDONOM/ AUTONOM / SPONTAN
GERAK YANG DIPENGARUHI DARI DALAM DIRI SENDIRI
PROTOPLASMA SEL TANAMAN
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DAUN PETAI CINA YANG MENUTUP SAAT MALAM
NIKTI NASTI
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PUTRI MALU
DISENTUH AKAN MENUTUP
NASTI
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BUNGA PUKUL 4
PAGI HARI
JAM 4 SORE
FOTO NASTI
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SULUR TANAMAN
TIGMOTROPISME = SENTUHAN
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STOMATA DAUN
NASTI KOMPLEKS
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DAUN DAN BATANG AKAN MENUJU KEARAH
DATANGNYA CAHAYA
FOTOTROPISME
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VENUS YANG MENANGKAP SERANGGA
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NASTI
GERAK BAGIAN TUBUH AKIBAT PENGARUH RANGSANG DARI LUAR
ARAH GERAK TIDAK DIPENGARUHI DATANGNYA RANGSANG
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TAKSIS
GERAK PINDAH TEMPAT YANG DILAKUKAN OLEH ORGANISME
ARAH BIASANYA MENJAUHI ATAU MENDEKATI DATANGNYA RANGSANG
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CONTOH GERAK TAKSIS
a) sebelum disinari b) setelah disinari
Gerak pindah tempat organel kloroplas di dalam sel-sel tumbuhan Elodea ketika sel disinari
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