NAVRACHANA UNIVERSITY Osmosis in Plant Cells Plant cells

NAVRACHANA UNIVERSITY Osmosis in Plant Cells • Plant cells are structurally more complex.

NAVRACHANA UNIVERSITY Plant Cells and Osmosis Vacuole fills

NAVRACHANA UNIVERSITY Osmosis in Plant Cells • Plant cells are structurally more complex. • They are surrounded by a cellulose cell wall which is… – Freely permeable to water – Inelastic – Able to resist cell expansion

NAVRACHANA UNIVERSITY Osmosis in Plant Cells • Plant cells are structurally more complex. • They are surrounded by a cellulose cell wall • They contain a large permanent vacuole which… – Contains a solution of salt, sugars and ions – Is bound by a selectively permeable membrane – Exchange water by osmosis with the solution surrounding the cell

NAVRACHANA UNIVERSITY Osmosis in Plant Cells Cell wall

NAVRACHANA UNIVERSITY Osmosis in Plant Cells Cell wall Cell membrane

NAVRACHANA UNIVERSITY Osmosis in Plant Cells Cell wall Cell membrane Cytoplasm Vacuole membrane

NAVRACHANA UNIVERSITY Osmosis in Plant Cells • If placed in a less concentrated solution… Water enters the vacuole by osmosis

NAVRACHANA UNIVERSITY Osmosis in Plant Cells • If placed in a less concentrated solution… Vacuole swells, pushing the cytoplasm against the cell wall

NAVRACHANA UNIVERSITY Osmosis in Plant Cells • If placed in a less concentrated solution… y d o o w e l t t i l The inelastic cell wall t r e o v p a p h u h s expansion c i r resists h o f w r , o y s t t g i r n v u and the a a t l cell becomes r p g n o g d n n y l u a e o r d Y , n rigid, or TURGID. It i e u w s tis n i can be described as aga in a state of TURGOR

NAVRACHANA UNIVERSITY Osmosis in Plant Cells • If placed in a more concentrated solution… Water leaves the vacuole by osmosis

NAVRACHANA UNIVERSITY Osmosis in Plant Cells • If placed in a more concentrated solution… The vacuole shrinks pulling the cytoplasm away from the cell wall

NAVRACHANA UNIVERSITY Osmosis in Plant Cells • If placed in a more concentrated solution… f wall o Membrane peeling away fromtt the cell e s h o , l r e s t ea d s n w o l a h Theencell t sis now h i l l c d i w h c a d w e t d t t r e PLASMOLYSED or is in a a n o l s f a p y l l n p. i p S o u D state of. T PLASMOLYSIS y y I s l m l L d C I s n u o a f C l W w o r A p t o w e L n y s F a nng m t n l i r o a p o o s l n ey e Ao s h s p t N o a l p t l h l o l l u r f e s e c t e s re a wa m s o beac