Plant Physiology

The actual pressure with which water enters into the cell is called D.P.D. (Diffusion Pressure Deficit).

The chief function of vessels in the plant body is to conduct water and mineral salts.

If a few cells of a plant such as Spirogyra are put into a strong solution the cell contents contract away from the wall. This is known as plasmolysis.

Suction pressure will be zero when a cell is fully turgid.

Water in plant is transported by xylem. It is known as ascent of sap.

When the dark period of a short day plant is interrupted by a brief exposure of light then the plant will not flower at all.

Induction of root formation in stem cutting is the basis for commercial application.

The common phase between aerobic and anaerobic respiration is glycolysis.

During cell enlargement phase of growth, molecules of new cell wall material are inserted between the original molecules of stretched wall. This process is known as intus-susception.

Avena coleoptile test is for IAA.

Evergreen trees remains green through out the year on account of the fact that leaves fall throughout the year in small numbers at intervals.

Anabaena is autotrophic nitrogen fixer.

Plant movements due to external stimuli are called paratonic movements.

Assimilatory power in photosynthesis is used in synthesis of PG-aldehyde.

Glyoxysomes are meant for degradation of fat.

Lipase enzyme is the most important in the germination of castor seed.

Aerobic respiration produces more usable chemical energy than fermentation because fermentation involves partial oxidation of food.

Potometer is used to determine the rate of transpiration in plants.

Most of the plants obtain nitrogen from the soil in the form of nitrates.

Guttation is the process of elimination of water from plants through hydathodes.

Carbon becomes available to crop plants in the form of Carbon dioxide.

Trace element is an element which is required in very small amount.

The largest amount of phosphate bond energy is obtained during pentose phosphate pathway.

Minerals absorbed by roots move to the leaf through xylem.