Plant growth can occur only under certain favorable combination of environmental conditions. Of particular importance for growth are the temperature

Temperature effect on plant growth [Influence, Impact, Role]

Plant growth can occur only under certain favorable combination of environmental conditions. Of particular importance for growth are the temperature, soil moisture and air, and light.

However, these conditions do not act in isolation, but in close cooperation with each other.

Plant growth is possible only at a certain temperature. At temperatures below zero the growth of higher plants (Embryophytes) is not observed. At temperatures above freezing starts very slow growth that amplifies to a temperature lying between 20 and 30 °C. Higher temperatures slow the growth process.

The effect of temperature on various plants is well illustrated by the germination of seeds in a number of crop plants. As seen from the table, seeds of more southern origin germinate at much higher temperatures and have a higher optimum and maximum temperature (pumpkin, cucumber) as compared to plants of moderate latitudes (barley, buckwheat).

Table. Temperatures of germination of various plants’ seeds in Celsius degrees

Plant

Minimum

Optimum

Maximum

Barley

0-5

25-31

31-37

Buckwheat

0-5

25-31

37-44

Hemp

0-5

37-44

44-50

Sunflower

5-10

31-37

37-44

Corn

5-10

37-44

44-50

Pumpkin

10-15

37-44

44-50

Melon, Cucumber

15-18

31-37

44-50 Taken from http://worldofschool.org

Some spring plants can grow at relatively low temperatures of environment. This ability have alpine and polar plants. It should be emphasized that almost all of these plants are perennials. They accumulate the nutrients during the summer and then in the spring start to spend them vigorously. Many spring plants, due to the intense breathing and raising their body temperature may break through the melting snow. Most algae, as attached, as well as members of the plankton (plankton is a still or slow-moving organisms suspended in column the water), are developing at a low water temperature 4-10 °C. Such temperatures contribute to the development of the mass of individuals, obviously, due to the intensive photosynthesis and comparatively moderate respiration. All polar waters are much richer in the number of phytoplankton (by number of individuals) compared to tropical seas, but poorer than their number of species.

All these facts indicate dissimilarity of temperature conditions at which takes place the growth of different species of plants. Adapting to the environment, the plant mastered the Arctic and the hot springs, hot deserts and harsh conditions of high mountains.

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