6 Factors affect growth.
1 - soi nutrients - contain nutrients essential for plant growth - nitrates to make proteins. Phosphates used in photosynthesis & respiration. Magnesium used to make chlorohpyll.
2 - Light - plants need it for photosynthesis. w/out it can't photosynthesis and don't get gluecose they need for energy & growth.
3 - Temperature - plants grow best when warm, but not too hot. Reactions for synthesis happen quicker when warm - rate of synthesis grows. BUT if too hot enzymes denature - growth stops.
4-CO2 - Only 0.04% of co2 in atmosphere - plants need it for synthesis - if not enough - plant growth rate slows down.
5- o2-need it for respiration - which provides energy for growth - plants absorb o2 from atmosphere & also create it as by-product of photosynthesis.
6- plant hormones - stimulate growth.
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