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STRUCTURE AND FUNCTION OF PLANT’S BODY
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Gambar anatomi organ tumbuhan, tentukan nama organ dan fungsinya.
Ciri2 dari berbagai jaringan pada tumbuhan (jaringan. meristem, parenkim, sklerenkim, floem, xylem). Gambar penampang batang dikotil. Perbedaan tumbuhan dikotil dan monokotil.
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The Organs of Plant are: Root Stem Leaf Flower Fruit
THE MAIN ORGANS
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ROOT The structure of plant that located in the ground
Root have three main functions: - Absorb water and minerals from the soil - Anchor a plant in the ground - Store food
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Types of Root Fibrous Root System Taproot System
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Fibrous Root System Consist of many similarly sized roots that form a dense Grass, Corn, and Onions have fibrous root system
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Taproot System A taproot system has one long, thick main root.
Many smaller roots branch off the main root A plant with a taproot system is hard to pull out of the ground Mango, Orange, and Apple have taproot system
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The Structure of a Root Tip of the root is rounded
and is covered by a sructure called the ROOT CAP The Root cap protects the root from injury from rocks as the root grows through the soil Root hairs grow out of the root’s surface
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Inner Structure of Root
Surface cells (Epidermis) Cortex Endodermis Stele (Center of the root) Vascular System Vascular System consist of Xylem and Phloem Xylem: Transports water and minerals upward to the plant’s stem and leaves. Phloem: Transport food manufactured in the leaves to the root. The root tissues may then use the food for growth or store it for future use by plant
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STEM The stem of a plant has two main functions:
The stem carries substances between the plant’s root and leaves The stem also provides support for the plant Store food
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Types of Stem Herbaceous Woody
Herbaceous stems contain no wood and are often soft. Sunflower and pepper plant a have herbaceous stems. Woody woody stems are hard and rigid. Mango and roses have woody stems. A woody stem contains several layer of tissue.
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Annual Rings These circles are called annual rings because they represent a tree’s yearly growth. Annual rings are made of xylem Xylem cells that form in the spring are large and have thin walls because they grow rapidly. They produce a wide and light brown ring. Xylem cells that form in the summer grow slowly and therefore are small and have thick walls. They produce a thin and dark ring.
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LEAVES Leaves vary greatly in size and shape
Leaves capture the sun’s energy and carry out the food-making process of photosynthesis
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The Structure of a Leaf The leaf’s top and bottom surface layers protect the cell inside. Between the layers of cells are veins that contain xylem and phloem. The surface layers of the leaf have small openings or pores called stomata. Stomata open and close to control when gases enter and leave the leaf. The cells that contain the most chloroplasts are located near the leaf’s upper surface. The chlorophyll in the chloroplasts traps the sun’s energy
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Controlling Water Loss
The process by which water evaporates from a plant’s leaves in called transpiration. One way that plants retain water is by closing the stomata. The stomata often close when leaves start to dry out.
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PHOTOSYNTHESIS
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Proses fotosintesis dan hasilnya
Faktor-faktor yang mempengaruhi fotosintesis. Percobaan sach
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Langkah percobaannya:
PERCOBAAN SACHS DAN PERCOBAAN INGENHOUZ UNTUK MEMBUKTIKAN ADANYA PERISTIWA FOTOSINTESIS 1. PERCOBAAN SACHS Membuktikan bahwa pada fotosintesis akan dihasilkan zat tepung (amilum) dan cahaya berpengaruh terhadap fotosintesis Langkah percobaannya: Beberapa daun ditutup dgn aluminium foil dan beberapa dibiarkan terbuka sampai 2 hari. Setelah itu daun dipetik. Daun dimasukkan pada air yang mendidih untuk mematikan sel-sel daun Kemudian daun dimasukkan pada alcohol panas untuk melarutkan klorofil Setelah itu akan ditetesi dengan larutan iodium (lugol). Untuk menguji adanya amilum. Hasilnya : daun yang ditutup aluminium foil warnanya tetap dan menguning, sedangkan daun yag dibiarkan terbuka akan berwarna biru tua. Hal ini membuktikan bahwa pada peristiwa fotosintesis akan dihasilkan amilum (zat tepung) dengan bantuan cahaya.
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KINDS OF ORGANISM BASED ON GETTING THE FOOD
AUTOTROPHIC Organism that are able to produce organic material or organism that are able to make food itself. e.q. green plant HETEROTROPHIC Organism that aren’t able to produce organic material or organism that can’t make food itself. e.q. human, animal
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STRUCTURE OF LEAF vascular tissues epidermis air spaces epidermis
chloroplast air spaces vascular tissues epidermis Guard cells
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Internal leaf structure
Epidermis top and bottom Pallisade Layer most cells with chloroplasts Spongy Layer gas exchange through stomata
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Leaf Parts Apex Base Margin Epidermis Stomata Mesophyll Tip of leaf
Attaches to petiole – if petiole is absent, attaches directly to stem Margin Edge of leaf Epidermis “Skin” of leaf - responsible for gas exchange Stomata Outside layer of leaf opening in epidermis where gas and water exchange Mesophyll Middle layer of leaf where photosynthesis occurs
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Leaf Parts Blade Petiole Midrib Main body of leaf
Attaches blade to stem Midrib Large central vein PETIOLE AN OUTGROWTH FROM PETIOLE OR LEAF BASE OF CERTAIN PLANTS. BLADE LONG NARROW LEAF OF GRASS
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Parts of leaf Dicotyl leaf
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Monocotyl leaf
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Parts of chloroplast
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What are the functions of leaves?
Make Food (carry out photosynthesis) Gas Exchange (take in carbon dioxide and release oxygen and water vapor) Stomate (usually on bottoms of leaves) Guard Cells open and close stoma (hole) as they fill up with and lose water.
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STOMATA Guard cells Epidermis cells chloroplast nucleus open closed
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PHOTOSYNTHESIS Light reaction - using light (sunlight)
- absorption light by chlorophyll - change of light energy become to chemical energy (ATD & NADPH) - occur fission of water molecule is called fotolisis H2O H2 O2
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Dark reaction - not use light
- absorption carbon dioxide is called fixation of carbon dioxide - using chemical energy the result of light reaction and carbon dioxide to make starches (amillum) by reaction that help with enzyme - This process is called Calvin cycles
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Photosynthesis Reaction
6CO2 + 6H2O (with sunlight and chlorophyll) C6H12O6 (glucose) + 6O2 Water moves into root cells by osmosis and up through the xylem tubes to the leaf cells The food moves down through phloem cells to the rest of the cells of the plant
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Factors that influence photosynthesis
Age of leaf/chlorophyll Water Carbon dioxide Term Light Oxygen
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MOVEMENT IN PLANTS
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Gambar gerak tumbuhan yang diberi stimulus serta responnya.
Gambar Contoh-contoh gerak higroskopisme dan keterangannya Respon tumbuhan terhadap pengaruh luar. Contoh kasus kerusakan pada tumbuhan dan tentukan penyebabnya serta nama penyakit/kelainannya
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MOVEMENT IN PLANT Based on its stimulus, the movements in plant are grouped into three : 1. ENDOGENOUS MOVEMENT 2. EXOGENOUS MOVEMENT 3. HYGROSCOPIC MOVEMENT
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ENDOGENOUS MOVEMENT (AUTOTOMIC)
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ENDOGENOUS MOVEMENT Is movement that is not known yet its cause certainly but predicted this motion is caused by stimulus that comes from the body of plant itself. Examples - the flowing movement of cytoplasm in cell - the bending movement of leaf bid because of difference of growth velocity
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EXOGENOUS MOVEMENT (ETIONOM/ESIONOM)
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EXOGENOUS MOVEMENT Is plant movement that it is caused by external stimulus External stimulus such as : Light, gravity, water, touch, and chemical substance
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The various kinds of exogenous movements in plants
Tropism movement Nastic movement Taxis movement
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TROPISM MOVEMENT Is movement of part of plant to stimulus that is movement direction is determined by the stimulus Kinds of tropism 1. phototropism 2. geotropism 3. chemotropism 4. thigmotropism 5. hydrotropism
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PHOTOTROPISM Is tropism movement that caused by stimulus of light
Examples the tip of plant that lies in room will bend to direction of incident light
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GEOTROPISM Is tropism movement that follows earth gravitational force
positive geotropism is geotropism movement that its direction is downward Negative geotropism is geotropism movement that its direction upward
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GEOTROPISM
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CHEMOTROPISM Is tropism movement that is caused by chemical substances stimulus Example : the movement of root to food/fertilizer substance in soil
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THIGMOTROPISM Is tropism movement that is caused by stimulus of touch to harder thing Example Tendril of plant movement
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HYDROTROPISM Is the movement of plant root that is influenced by reservation of soil water.
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NASTIC MOVEMENT
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NASTIC MOVEMENT Is plant movement to stimulus, that its direction is not determined by stimulus but by plant itself Kind of nastic movement 1. photonasty 2. nictinasty 3. thigmonasty 4. thermonasty 5. complex nasty
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PHOTONASTIC Is nasty movement that its caused by stimulus of light
example the opening of Mirabilis jalapa flower at certain time
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NICTINASTY Is nasty movement that its caused by dark condition (sleeping movement) Examples the closing of Butterfly flower ‘s leaves at night the closing of compound leaves of Leucaena glauca at night
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THIGMONASTY Is nasty movement that its caused by stumulus of touch
Example the closing of leaves of Mimosa pudica when touched
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THERMONASTY Is nasty movement that is caused by temperature stimulus
Example Tulip flower will develop if suddently get temperature increasement
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COMPLEX NASTY Is nasty movement that is caused by several factors altogether Example the opening and closing of stomata is influenced by light, chemical substance and water
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PICTURE THE OPENING AND CLOSING OF STOMATA
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TAXIS MOVEMENT
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TAXIS MOVEMENT Is transfer movement of all part to stimulus that its direction is determined by the stimulus Kinds of taxis movement 1. phototaxis 2. chemotaxis
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PHOTOTAXIS Is taxis movement that is caused by stimulus of light
Example the movement of chlorophyll to surface/nearer surface the leaves to get the light
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CHEMOTAXIS Is the taxis movement that is caused by chemical substances stimulus. Example movement of spermatozoid of moss and fern to ovum that is found in archegonium attracted to the sugar or protein that is produced by archegonium
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HYGROSCOPIC MOVEMENT
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HYGROSCOPIC MOVEMENT Is movement of part of plant that is caused by the influence of the change of water level from its cells so happens non-homogenous wrinkling Example the breaking of dried Calanchoe pinnata fruit (cocor bebek)
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The opening of sporangium in fern as the cause of wrinkling annulus cells
ANULUS
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The opening of sphorangium of moss as the cause of the wrinkling peristome cells
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