In the middle of the XX century V.A. Novikov and F. M. Kuperman came to the conclusion that after the first two phases of plant development are still

Third and fourth phases of plant development [stages]

In the middle of the XX century V.A. Novikov and F. M. Kuperman came to the conclusion that after the first two phases of plant development are still two stages — the third and fourth. Each of these phases of development is characterized by its special metabolic level. The presence of these two developmental stages has been found for a number of plants (wheat, oats, tomatoes, flax, rye, clover).

The third phase is characterized by the need of plants in an elevated temperature; a significant influence in this period also has the quality of light. The end of the third stage coincides with the formation of the first pollen tetrad. Taken from http://worldofschool.org

The fourth stage of development is characterized by a heightened sensitivity of the plant to the light intensity. With decreasing light intensity in this period, the seed formation does not occur in plants.

It should be noted that the third and fourth phases of development in plants are studied not enough and it’s needed to examine the issue further.

Categories: