Chapter 35 Notes (Basic Structures of the plants)

Chapter 35 Notes (Basic Structures of the plants) - Chapter...

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Chapter 35 Notes (Basic Structures of Plants) 1. Three basic organs (Leaves, stems, and roots) a. Shoot System - the part that is above the ground i. Stem Main roles - Transport of substance - Leaves are attached Classification (Cross-section) - Widely spread out vascular tissues - monocots - Vascular tissues arranged in a ring – dicots Characteristics - Axillary bud- angle formed by each leaf and stem- potential to form a lateral shoot or branch, develop from meristematic cells left by the apical meristem. - Terminal bud- located near shoot tip and causes elongation of young shoot. ii. Leaves Main roles and characteristics - Photosynthesis - Gas exchange (Carbon dioxide and oxygen) - Covered by waxy layers (cuticles) Classification (Vein) - Parallel veins - monocots - Branching veins - dicots b. Root system – the part that is under the ground i. Main roles and characteristics Lack of photosynthetic cells and cuticles Anchors plant in soil Absorbs minerals (Nitrogen, potassium, calcium…) and water Stores food Symbiotic relationship with mutual fungi (mycorrhizae) – increases surface area and exchange important nutrients and water and mineral uptake is faster when mycorrhizae are present. ii. Classification Fibrous root – close to the ground, found in monocots. Taproot – Very deep to the ground, found in dicots, more efficient in preventing from soil erosion. iii. Root hairs (Figure 35.3) Exist in both taproot and fibrous rot Absorbs most of the water and minerals taken up from the soil
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Chapter 35 Notes (Basic Structures of Plants) Huge surface area – efficient substance exchange 2. Three Tissue System in Plants a. Meristematic tissues are undifferentiated tissues that can be differentiated into
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Chapter 35 Notes (Basic Structures of the plants) - Chapter...

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