Describe and explain how the change in ion concentration causes the guard cell volume to change. Use the information in Table 3.1 in your answer.

High(er) ion concentration results in large(r) (guard cell) volume ; ora comparative data quote with units to support any description ; high(er) ion concentration causes low(er) water potential ; ora (high ion concentration causes) water to move into (guard) cells ; across partially / AW, permeable membrane ; by osmosis ; large cell volume correlates with high turgor pressure ; ora because cell water / membrane / cytoplasm / vacuole, pushes more on cell wall ;