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Plant Transport Water Movement in Xylem Sugar Movement in Phloem http://glencoe.mcgrawhill.com/sites/9834092339/student_view0/ch apter38/animation_-_phloem_loading.html Transport of Gases- Stoma http://yteach.com/index.php/resources/camb ium_cuticle_cutin_meristem_mitosis_protopl ast_systematics_transpiration_t_page_21.ht ml Stoma also affect water conservation/loss • Water is lost from a plant in the process of transpiration. • This is the evaporation of water from plants. Transpiration Water is lost from three main areas of a plant: • Stomata – in the leaves, account for about 90% of water loss • Cuticle – the waxy layer, some water is lost through diffusion • Lenticles – woody stems have loosely packed cork cells through which gas exchange occurs – a little water is lost here Transpiration • Water moves through the plant from roots to leaves and is lost to the air as water vapour. • This is known as the transpiration stream. • About 98% of water entering a plant is lost to the air through transpiration • Remaining 2% is used for photosynthesis stem roots stem roots Water enters roots by osmosis stem roots Water and ions pass up xylem Water enters roots by osmosis stem roots Water and ions pass up xylem Water enters roots by osmosis stem roots Water and ions pass up xylem Water enters roots by osmosis The movement of water through the plant is called the transpiration stream stem roots Water and ions pass up xylem Water enters roots by osmosis The movement of water through the plant is called the transpiration stream stem roots Water and ions pass up xylem Water enters roots by osmosis The movement of water through the plant is called the transpiration stream stem roots Water and ions pass up xylem Water enters roots by osmosis Transpiration water evaporates from leaves The movement of water through the plant is called the transpiration stream stem roots Water and ions pass up xylem Water enters roots by osmosis Transpiration water evaporates from leaves The movement of water through the plant is called the transpiration stream stem roots Mineral ions enter by active transport Water and ions pass up xylem Water enters roots by osmosis Transpiration water evaporates from leaves The movement of water through the plant is called the transpiration stream stem roots Mineral ions enter by active transport Water and ions pass up xylem Water enters roots by osmosis Transpiration water evaporates from leaves The movement of water through the plant is called the transpiration stream stem roots Mineral ions enter by active transport Water and ions pass up xylem Water enters roots by osmosis Transpiration Photosynthesis produces sugar in the leaves water evaporates from leaves The movement of water through the plant is called the transpiration stream stem roots Mineral ions enter by active transport Water and ions pass up xylem Water enters roots by osmosis Transpiration Photosynthesis produces sugar in the leaves water evaporates from leaves The movement of water through the plant is called the transpiration stream stem roots Mineral ions enter by active transport Water and ions pass up xylem Water enters roots by osmosis Transpiration Photosynthesis produces sugar in the leaves water evaporates from leaves The movement of water through the plant is called the transpiration stream stem roots Mineral ions enter by active transport Water and ions pass up xylem Water enters roots by osmosis Transpiration Photosynthesis produces sugar in the leaves water evaporates from leaves Sugar is transported in phloem The movement of water through the plant is called the transpiration stream stem roots Mineral ions enter by active transport Water and ions pass up xylem Water enters roots by osmosis Transpiration Photosynthesis produces sugar in the leaves water evaporates from leaves Sugar is transported in phloem The movement of water through the plant is called the transpiration stream stem roots Mineral ions enter by active transport Water and ions pass up xylem Water enters roots by osmosis Factors Affecting Transpiration Rates http://www.sciencemag.org/site/feature/misc /webfeat/vis2005/show/transpiration.swf Transpiration • Deforestation decreases the rate of transpiration due to the large-scale removal of forest which normally add water vapour to the air • This can have a serious effect upon the water cycle Transpiration
