Thursday 30 April 2020
Explain how the various abiotic factors may affect plants
Temperature; affects soil formation and
distribution of plants; affect transpiration rate as high temperatures lead to
high rates of transpiration; It also affects the rate of photosynthesis with
the direct influence on enzyme activity; Light intensity; affects the rate of
photosynthesis; Wind; increase the transpiration rates; affects dispersal of
seeds and fruits; agents of pollination; affect distribution in terms of wind
storms/breakages; Atmospheric pressure; high atmospheric pressure leads to low
rates of transpiration; high oxygen and carbon (IV) oxide concentration; high
photosynthetic rates; while low atmospheric pressure leads to high
transpiration rates; less concentration of oxygen and carbon (IV) oxide;
leading to low rates of photosynthesis; Water/Rainfall; forms a raw material
for photosynthesis; helps in support in plant tissues; affects distribution of
plants; Humidity; low humidity leads to high transpiration rates; while high
humidity leads to low rates of transpiration; pH; affects distribution of
plants; some grow in acidic soils; others in alkaline soils; Edaphic/soil
factors; affects plant distribution; in terms of being sources of water and
mineral salts; provide a substratum for anchorage of plants;
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