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Morfologi Tumbuhan

Morfologi Tumbuhan. Reproductive shoot (flower). Terminal bud. Node. Internode. Terminal bud. Shoot system. Vegetative shoot. Blade Petiole. Leaf. Axillary bud. Stem. Taproot. Root system. Lateral roots. Figure 35.2. Three Basic Organ in Plant.

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Morfologi Tumbuhan

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  1. Morfologi Tumbuhan

  2. Reproductive shoot (flower) Terminal bud Node Internode Terminal bud Shoot system Vegetative shoot Blade Petiole Leaf Axillary bud Stem Taproot Root system Lateral roots Figure 35.2 Three Basic Organ in Plant • Three basic organs evolved: roots, stems, and leaves • They are organized into a root system and a shoot system

  3. The Three Basic Plant Organs: Roots, Stems, and Leaves • The basic morphology of vascular plants • Reflects their evolutionary history as terrestrial organisms that draw nutrients from two very different environments: below-ground and above-ground

  4. Roots • A root • Is an organ that anchors the vascular plant • Absorbs minerals and water • Often stores organic nutrients

  5. AKAR / ROOTS • Fungsi Akar • Perkembangan Akar • Tipe – Tipe akar • Modifikasi Akar • Simbiosis di akar http://w3.dwm.ks.edu.tw/bio/activelearner/35/images/ch35summary.gif

  6. Fungsi Akar • Attachment to substrate (ground, etc) • Water and nutrien uptake • Transport In several plants: • Food storage • Oxygen uptake • Climber

  7. Figure 35.3 • In most plants • The absorption of water and minerals occurs near the root tips, where vast numbers of tiny root hairs increase the surface area of the root

  8. Perkembangan akar

  9. Cortex Vascular cylinder Epidermis Key Zone of maturation Root hair Dermal Ground Vascular Zone of elongation Apical meristem Zone of cell division Root cap Figure 35.12 100 m Primary Growth of Roots • The root tip is covered by a root cap, which protects the delicate apical meristem as the root pushes through soil during primary growth • The primary growth of roots • Produces the epidermis, ground tissue, and vascular tissue

  10. 100 m Emerging lateral root 2 3 4 1 Cortex Vascular cylinder Epidermis Lateral root Figure 35.14 • Lateral roots Arise from within the pericycle, the outermost cell layer in the vascular cylinder

  11. Sistem Perakaran

  12. Tipe Akar Berdasarkan Pembentukannya • Akar Tunggang • Akar Serabut • Akar Adventif (lainnya)

  13. Tipe – Tipe Akar Akar papan/banir Akar tunjang

  14. (c) “Strangling” aerialroots (a) Prop roots (b) Storage roots Figure 35.4a–e (d) Buttress roots (e) Pneumatophores • Many plants have modified roots

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