Basic Plant Physiology

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Information about Basic Plant Physiology

Published on January 7, 2008

Author: UpBeat


Basic Plant Physiology:  Basic Plant Physiology Ag. I By: Jessica George Basic Parts of a Flowering Plant:  Basic Parts of a Flowering Plant Roots Stems Leaves Flower Functions of Roots :  Functions of Roots 1. Anchor plant 2. Absorb water and minerals 3. Translocate water and minerals to stem 4. Store food Types of Roots:  Types of Roots A. Tap Root Continuation of the primary root Ideal for anchorage Penetration is greater for water Storage area for food made by photosynthesis Types of Roots:  Types of Roots B. Fibrous Roots Many finely branched secondary roots Shallow roots cover a large area More effective absorption of water and minerals Roots hold the soil to prevent erosion Types of Roots:  Types of Roots C. Aerial roots Short roots that grow horizontally from the stems Roots that fasten the plant to a support Absorptive air roots Types of Roots:  Types of Roots D. Adventitious Roots Develop in places other than nodes Can form on cuttings and rhizomes Root Hairs:  Root Hairs Tiny one celled hair like extensions of the epidermal cells located near the tips of the roots wherevascular tissues have formed. Increase surface area Absorb water and minerals from soil Functions of Stems:  Functions of Stems 1. Translocate water, minerals and food to the leaves 2. Support the leaves and display them to light 3. Store Food Specialized Stems:  Specialized Stems A. Corm (gladiolus, crocus) underground Solid, fleshy, scale covered Specialized Stems:  Specialized Stems B. Bulb (tulips, lillies, onions) Layers of fleshy scales that overlap each other Underground stem Specialized Stems:  Specialized Stems C. Tuber (potato, caladium) Food storage area Short, thick underground stem Specialized Stems:  Specialized Stems D. Crown (African Violets, fern) Closely grouped stems or plantlets Just above ground or just below Specialized Stems:  Specialized Stems E. Spurs (pear and apple trees) Short sems found on woody plant limbs adapted for increased production of fruits Specialized Stems:  Specialized Stems F. Rhizomes (iris, lily of the valley) Underground stems that produce roots on the lower surface and extend leaves and flower shoots above the ground Specialized Stems:  Specialized Stems G. Stolon (Strawberry, airplane plant) Stem that grows horizontally above the soil surface Functions of Leaves:  Functions of Leaves 1. Make food through photosynthesis 2. Provide site of gas exchange 3. Store food Parts of a Leaf:  Parts of a Leaf Functions of Flowers:  Functions of Flowers 1. Contain organs for specialized sexual production 2. Produce seeds and fruit Parts of the Flower:  Parts of the Flower Sepals Outer covering of the flower bud Protects the stamens and pistills when flower is in bud stage Parts of the Flower:  Parts of the Flower Petals Brightly colored Protects stamen and pistills Attracts pollinating insects Parts of the Flower:  Parts of the Flower Stamens Male Reproductive part Anther-produces pollen Filament-supports the anther Parts of the Flower:  Parts of the Flower Pistil Female reproductive part Ovary Enlarged portion at base of pistill Produces ovules which develop into seeds Stigma Holds the pollen grains Parts of the Flower:  Parts of the Flower Style Connects the stigma with ovary Supports the stigma so that it can be pollinated Complete and Incomplete Flowers:  Complete and Incomplete Flowers Complete: have all four main parts Sepals Petals Stamens Pistils

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