cod irst develops in older leaves of a plant is a charac of what element? 4. Ide

Question

cod irst develops in older leaves of a plant is a charac of what element? 4. Identify the following: a. b.Diffusion of water through a semipermeable membrane from Nutrients needed by plants in very small amounts. potential (i.e., more water) to a region of less water potential First step in the germination of seeds. C. d.Loss of water through osmosis Nutrient element that is involved in the regulation of transpira 4. Although only 10% of the water absorbed by the roots is retained by plants, this an important for at least 3 different reasons such as: b. 5. In the movement of organic solutes throughout the plant body, what do you call th the: a. origin of the translocated solutes b. recipient of the translocated solutes c what hannns to the stomata when photosynthesis occurs or does not occur? Exp

Explanation / Answer

4)

a) Micronutrients are the nutrients needed by the plants in very small amounts.

b) Osmosis. Osmosis is the diffusion of water through a semi-permeable membrane from a hypotonic solution to a hypertonic solution, i.e., from higher water water potential to lower water potential.

c) Imbibition. The first step in the seed germination is imbibition i.e. absorption of water by the dryseed. Imbibition results in swelling of the seed as the cellular constituents get rehydrated. The swelling takes place with a great force. It ruptures the seed coats and enables the radicle to come out in the form of primary root.

d) Plasmolysis. When a living plant cellloses water Through osmosis, there is shrinkage or concentration of the protoplasm away from the cell wall. This process is called as "Plasmolysis."

e) Potassium. Ion uptake into guard cells causes stomatal opening: The opening of gas exchange pores requires the uptake of potassium ions into guard cells. Potassium channels and pumps have been identified and shown to function in the uptake of ions and opening of stomatal apertures.

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