(b) How does temperature influence plant growth?

Influence of temperature on plant growth

• Temperature acts as a limiting factor in plant growth and development by influencing the rate of cell division, cell metabolism, photosynthesis, respiration, and excretion which directly impact on growth.
• It affects the rate of enzyme reaction reactions which are responsible for growth, doubling the rate for every 10⁰C rise within the enzyme working range. Thus, when maintained within the enzyme working range, temperature will promote growth.
• Above or below the enzyme working range, enzymes are denatured or inactive respectively. In either case, the reaction ceases, leading to delayed/limited growth.
• Low temperature stimulates flowering and germination in plants.

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