US National Weather Service Philadelphia September Weather data records that on September 28, 1984, the high temperature did not exceed 52 degrees Fahrenheit, the lowest high measured in Philadelphia in the past 69 years.
Vacuoles are generally used to store cell products or protect the rest of the cell from invading microorganisms. The large central vacuole of plant cells is a special case. It is used to store water and cellular wastes and helps maintain the necessary internal pressure of plants called turgor pressure. Structure.
17.3.2 Turgor maintenance. Turgor is crucial to plant function and must be maintained for plants to grow despite salinisation. Reduced water potential in saline soils reduces availability of water to roots, and if trans-piration continues, xylem tension increases and leads eventually to a loss of hydrostatic pressure (turgor) in shoot tissues.