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AGRICULTURAL BOTANY AGR 3101
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The course focuses on: Morphology (external plant structure) Anatomy (internal plant structure) Taxonomy (plant nomenclature, identification and classification)
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GROWTH HABITS OF PLANTS
Herb (Herba) Shrub (Renek) Tree (Berpokok) Climber (Memanjat) Epiphyte (Epifit) Parasite (Parasit) Saprophyte (Saprofit) Xerophyte (Zerofit) Mesophyte (Mesofit) Hydrophyte (Hidrofit)
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Herb A non-woody plant; annual, biennial or perennial; with short-lived above ground organs.
e.g. onion, padi, corn, banana Shrub A low lying woody perennial, having branches arising from the lower part of the stem. e.g. chilli, roses, hibiscus
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Tree A woody perennial,tall, with a single trunk and produces branches at the upper region.
e.g. durian, rambutan, tamarind Climber A plant with a long slender stem, produces branches and have specialised organ to cling to a support. e.g. bittergourd, pepper, pumpkin
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Epiphyte A plant that grows on another plant but does not absorb food/nutrients from it (non-parasitic). e.g. Vanda orchid Parasite A plant that grows on another plant and absorbs food/nutrients from it, to the extent of causing damage and death to the plant e.g. Loranthus spp.
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Saprophyte A plant that lives on decayed material or organic matter rich in nutrients such as in the axils of leaf sheaths of oil palm. e.g. ferns Xerophyte A plant that lives in a dry habitat or places that lack water. e.g. cactus and some ferns
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Mesophyte A plant that lives in a habitat with optimum supply of water; mainly field and horticultural crops of moist tropical and temperate regions. e.g. rubber, fruit species, forest species Hydrophyte A plant that lives in water, either floating on the water surface or submerged, or thrives in muddy swamps, rivers and lakes. e.g. water lily, lotus
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LIFE SPAN OF PLANTS Annual (Semusim) Biennial (Dua musim)
Perennial (Saka)
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Annual A plant that complete its life cycle in one year or less (undergoes vegetative growth, flowers, produces fruits and seeds, and finally dies) e.g. paddy, wheat, barley Biennial A plant that complete its life cycle in two years/seasons (undergoes vegetative growth in the first year/season and reproductive growth in the second year/season, and finally dies) e.g. carrot, radish
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Perennial A plant that lives for many years (more than two years), some may reach up to a hundred year. The stem is either woody or herbaceous. Herbaceous perennial (Saka herba) e.g. banana, ginger, languas Woody perennial (Saka berkayu) e.g. mangosteen, durian, dokong
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MORPHOLOGY OF ANGIOSPERMS
Study on the external structures of higher plants : Root Stem (Vegetative) Leaf Flower Fruit (Reproductive) Seed
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Plant Structure
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ROOT SYSTEMS 1. Tap root system - Dicotyledons
Fibrous root system - Monocotyledons Adventitious root system
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Tap root Dicotyledons Fibrous root Monocotyledons
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Tap root
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L Fibrous root system Adventitious roots
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ROOT MODIFICATIONS Climbing roots Prop/stilt roots Epiphytic roots
Buttress roots Pneumatophores
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Buttress roots Epiphytic roots Climbing roots Prop roots Pneumatophores
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ROOT MODIFICATION FOR STORAGE
fascicled fusiform conical napiform napiform tuberous
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STRUCTURE OF A ROOT TIP Vascular tissue Tisu vaskular Lateral root
Root hairs Maturation zone Elongation zone Root cap
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