HORMON PADA TUMBUHAN (FITOHORMON)
Summary
TLDRThis educational video script delves into the world of phytohormones, essential for plant growth and development. It explains the roles of hormones like auxin, cytokinins, gibberellins, abscisic acid, ethylene, and others in processes such as phototropism, etiolation, and fruit ripening. The script also touches on practical applications, like using ethylene to speed up avocado ripening and the use of cytokinins in bonsai cultivation to encourage branching. The lesson aims to inspire a deeper understanding of these plant hormones and their impact on agriculture and horticulture.
Takeaways
- 🌱 Plants use two types of hormones: growth promoters and growth inhibitors.
- 🌳 Auxin is a growth-promoting hormone that encourages upward growth and is typically found at the tips of roots and shoots.
- 🌞 Auxin's function is influenced by light, causing slower growth on the side exposed to sunlight due to its inhibitory effect under light.
- 🌿 Etiolation refers to rapid growth in dark places, leading to noticeable differences between etiolated and normally grown plants.
- 🌼 Gibberellin is a hormone that promotes cell elongation, seed germination, and flowering.
- 🌱 Cytokinins are hormones that inhibit apical dominance, allowing for the growth of lateral branches.
- 🍂 Abscisic acid is a growth inhibitor that closes stomata, causes leaf abscission during drought, and is exemplified by the shedding of leaves in trees like the banyan.
- 🍌 Ethylene is a gaseous hormone that functions in fruit ripening.
- 🥥 A practical tip is given for ripening avocados faster by placing them with bananas and wrapping them in paper.
- 🌿 Kalin is a hormone that forms different organs in plants, including rhizokalin for root formation, antokalin for flower formation, and filokalin for leaf formation.
Q & A
What are the two types of plant hormones mentioned in the script?
-The script mentions two types of plant hormones: growth promoters and growth inhibitors.
Which hormones are classified as growth promoters in plants?
-Auxin, cytokinin, and gibberellin are classified as growth promoters in plants.
What is the role of auxin in plant growth?
-Auxin is a growth promoter hormone that stimulates upward growth, is dominant at the apical growth of shoots and roots, and is usually found at the tips of roots and shoots.
How does light affect the growth of plants in relation to auxin?
-Light can inhibit the growth-promoting effects of auxin, causing slower growth on the side of the plant exposed to sunlight, which is due to the hormone being blocked by sunlight.
What is the term used to describe rapid growth in dark places?
-The term used to describe rapid growth in dark places is etiolation.
What is the function of gibberellin in plants?
-Gibberellin functions as a hormone that promotes cell elongation and encourages flowering and fruit development.
What is cytokinin and what is its role in plant growth?
-Cytokinin is a hormone that inhibits apical dominance, allowing for lateral growth and the formation of branches.
How can reducing auxin and increasing cytokinin affect the growth of a bonsai plant?
-Reducing auxin and increasing cytokinin can result in a bonsai plant that grows larger but remains small in stature, as it promotes branching and lateral growth.
What is abscisic acid and its role as a growth inhibitor?
-Abscisic acid is a growth inhibitor hormone that inhibits seed germination, closes stomata, and causes leaf abscission during dry seasons.
What is the function of ethylene gas in plants?
-Ethylene gas functions as a hormone that promotes fruit ripening and abscission.
What is the tip given in the script for ripening avocados faster?
-The script suggests that ripening avocados faster can be achieved by placing them with bananas and wrapping them in paper.
What are the functions of the hormones mentioned at the end of the script, such as rhizokalin, antokalin, and filokalin?
-Rhizokalin is involved in root formation, antokalin in flower formation, and filokalin in leaf formation.
Outlines
🌿 Plant Hormones: Growth and Regulation
This paragraph introduces the concept of phytohormones, which are crucial for plant growth and development. It distinguishes between two types of hormones: growth promoters and inhibitors. The paragraph explains the role of auxin, cytokinins, and gibberellins as growth promoters, and abscisic acid as a growth inhibitor. It also discusses the impact of light on the growth of plant stems, the phenomenon of phototropism, and the effect of auxin in promoting upward growth. Additionally, it covers the role of cytokinins in lateral growth and bud formation, and the use of these hormones in the cultivation of bonsai plants.
🍂 Hormonal Response to Environmental Stress in Plants
The second paragraph delves into the function of abscisic acid in stomatal closure and leaf shedding during drought, using the example of the teak tree. It also explains the role of ethylene as a ripening agent for fruits, with a practical tip on how wrapping bananas with paper can speed up the ripening of avocados. The paragraph further discusses the role of various plant hormones, including rhizokalins, antokalins, and filokalins, in the formation of roots, flowers, and leaves, respectively. The session concludes with a reminder to stay motivated and maintain health, ending with a traditional greeting.
Mindmap
Keywords
💡Fitohormon
💡Hormon Pemicu
💡Hormon Penghambat
💡Auxin
💡Etiolasi
💡Gibberelin
💡Cytokinin
💡Abscisic Acid
💡Ethylene
💡Kalin
Highlights
Introduction to phytohormones and their impact on plant growth.
Explanation of two types of plant hormones: stimulators and inhibitors.
Auxin as a growth stimulant hormone, promoting upward growth and found at the tips of roots and shoots.
Auxin's response to sunlight, causing differential growth and phototropism.
Etiolation, the rapid growth of plants in dark conditions due to auxin activity.
Gibberellin's role in promoting cell division, elongation, and flowering.
Cytokinins' function in inhibiting apical dominance and promoting lateral growth and branching.
Practical tips for bonsai cultivation, including hormone management to control growth.
Abscisic acid as a growth inhibitor hormone, involved in seed dormancy and stomata closure.
Ethylene gas's role in fruit ripening and its practical application in accelerating avocado ripening.
Introduction of the hormone Karrikin, which forms roots in plants.
Antokalin's function in flower formation.
Filokalin's role in leaf formation.
The importance of understanding phytohormones for plant health and growth management.
Encouragement to stay motivated and maintain health in the study of biology.
Closing remarks with a reminder of the significance of phytohormones in plant biology.
Transcripts
Halo assalamualaikum warahmatullahi
wabarokatuh bertemu lagi dengan ibu-ibu
analis tiani di pembelajaran biologi
kelas 12 baik anak-anak materi yang akan
kita bahas sekarang adalah tentang
fitohormon atau hormon pada tumbuhan
disimak baik-baik ya materinya
Hai Coba kalian Perhatikan gambar yang
Ibu sajikan berikut ini
Mengapa batang pada tumbuhan Bisa
bertambah tinggi
Hai atau Mengapa batang tanaman bonsai
Bisa bertambah besar tetapi tetap kerdil
nah hal itu dipengaruhi oleh fitohormon
atau hormon pada tumbuhan
hormon pada tumbuhan ada dua jenis ya
Yang pertama adalah hormon pemicu dan
yang kedua adalah hormon penghambat
hormon pemicu diantaranya adalah auxin
sitokin dan giberelin sedangkan hormon
penghambat diantaranya adalah asam
absisat kita bahas satu-satu ya Yang
pertama adalah hormon auxin mengandung
Hai ingat ya anak-anak pertumbuhan itu
ke atas bukan kesamping hormon auksin
adalah hormon pemicu pertumbuhan
dominansi apikal pertumbuhan Tunas dan
biasanya terdapat di ujung akar dan
ujung batang hormon auksin terurai oleh
cahaya matahari Coba kalian Perhatikan
gambar berikut ini
Hai ada dua jenis perbedaan pertumbuhan
pada tanaman tumbuhan yang pada salah
satu Sisinya terkena oleh cahaya
matahari maka pertumbuhannya akan lambat
Hal ini karena kerja hormon auksin
dihambat oleh cahaya matahari
Hai sedangkan Sisi tumbuhan yang tidak
disinari oleh cahaya matahari
pertumbuhannya sangat cepat karena kerja
auksin tidak terhambat Hal ini
menyebabkan ujung tanaman tersebut
cenderung mengikuti arah datangnya sinar
matahari atau yang biasa kita sebut
sebagai fototropisme kemudian ada lagi
istilah etiolasi etiolasi adalah
pertumbuhan yang amat Cepat ditempat
yang gelap
Hai kalian bisa membedakan dua tanaman
yang pertumbuhannya sangat berbeda yang
satu mengalami peristiwa etiolasi dan
yang satu lagi pertumbuhannya normal
sehingga hormon auksin akan bekerja pada
kondisi yang gelap atau auxin cinta
kegelapan
Hai hormon berikutnya adalah giberelin
giberelin berfungsi sebagai hormon
perkecambahan an pembelahan sel dan
merangsang pembungaan
Hai proses awal perkecambahan and adalah
imbibisi yaitu masuknya air kedalam biji
sehingga biji akan pecah dan muncul
plumulae hormon berikutnya adalah
sitokin cytokinin berfungsi sebagai
menghambat dominasi apikal pertumbuhan
ke arah samping dan untuk pembentukan
cabang-cabang
Hai tanaman bonsai yang kita tanam maka
tipsnya adalah bonsai kurangi auksin dan
tambah hormon sitokin
free download Harmoni selanjutnya adalah
asam absisat asam absisat merupakan
hormon penghambat yaitu menghambat
pertumbuhan dominansi biji menutupnya
stomata dan menggugurkan daun dikala
musim kemarau contohnya pohon jati
Hai hormon berikutnya adalah gas etilen
Hai gas etilen berfungsi untuk pemasakan
buah
Hai ada tips nih buah alpukat dapat
cepat matang jika disatukan dengan buah
pisang dan dibungkus oleh kertas nah
bagaimana buah pisang dan bungkus kertas
dapat mempercepat pemasakan buah alpukat
itu adalah kuis yang Ibu berikan pada
pertemuan saat ini kalian Jawab ya
kemudian jawabannya dikumpulkan melalui
Google classroom kita lanjutkan ya
anak-anak hormon berikutnya adalah Kalin
hormon ini berfungsi untuk membentuk
organ pada tanaman yang pertama ada
rhizokalin rhizokalin berfungsi sebagai
pembentukan akar yang kedua
ini adalah antokalin antokalin berfungsi
untuk membentuk bunga dan yang terakhir
ada filokalin filokalin berfungsi untuk
membentuk daun
Indonesia sekian ya pembelajaran untuk
saat ini tentang fitohormon semoga
kalian tetap semangat tetap jaga
kesehatan salamualaikum warahmatullahi
wabarakatuh
hai hai
تصفح المزيد من مقاطع الفيديو ذات الصلة
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