Lec3_PlantAnat

Lec3_PlantAnat - Lecture 3: Plant anatomy and physiology...

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Lecture 3: Plant anatomy and Lecture 3: Plant anatomy and physiology physiology by Edgar Moctezuma, Ph.D.
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Today… Announcements Plant Anatomy Cells Tissues Organs Plant Physiology Water & sugar transport Plant hormones
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Announcements… Labs start this week – get your lab manual. BSCI 125 students: if you have the following sections: 1109, 1110 Tues. 3:30-5:30 or, 1113, 1114 Wed. 12-2 or, 1115, 1116 Wed. 3-5 or 1123, 1124 Thurs. 3:30-5:30, and you can switch to an open section (Monday or Wed. 9:00-11:00), please try to do so. Thanks! Taking care of your plant : Do not overwater it! Water only when soil is dry to the touch. Place near a sunny window.
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From smallest to largest plants
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What is plant anatomy ? ANATOMY: study of the structure of organisms… looking at cells, tissues (Morphology: Study of form) What is plant physiology ? PHYSIOLOGY: study of the function of cells, tissues, organs of living things; and the physics/chemistry of these functions…
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Structure correlates to function Always keep in mind that in plant anatomy, morphology & physiology…
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How can water move from the ground all the way to the top of a 100 m tall redwood tree?
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Plant Anatomy: Cells Plant cells are basic building blocks Can specialize in form and function By working together, forming tissues, they can support each other and survive Levels of organization atoms > molecules > cells > tissues > organs > whole plant > pop.
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Plant Tissues Types All plant organs (roots, stems, leaves) are composed of the same tissue types. There are three types of tissue: 1. Dermal – outermost layer 2. Vascular – conducting tissue, transport 3. Ground – bulk of inner layers
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1. Dermal tissue Epidermis is the outermost layer of cells Like the “skin” of animals In stems and leaves, epidermis has cuticle , a waxy layer that prevents water loss. Some have trichomes, hairs. Root epidermis has root hairs, for water and nutrient absorption
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2. Vascular tissue Transports water and organic materials (sugars) throughout the plant Xylem – transports water and dissolved ions from the root to the stem and leaves. Phloem – carries dissolved sugars from leaves to rest of the plant
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Xylem Transports water and dissolved minerals Tracheids : long, thin tube like structures without perforations at the ends Vessel elements : short, wide tubes perforated at the ends (together form a pipe, called vessel).
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Lec3_PlantAnat - Lecture 3: Plant anatomy and physiology...

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