3.5 Plant nutrition 0.0 / 5 ? Biology3.5 Plant nutritionIGCSEEdexcel Created by: 14mut64Created on: 11-05-19 21:17 Photosynthesis Photosynthesis is the process which turns light energy into chemial energy in plants 1 of 3 Leaf adaptations Leaves: are broad - so they have large surface area for diffusion are thin - so gases only have to travel a short distance they have air spaces - letting gases move easily between cells they have stomata: letting the gases diffuse in and out of leaf which close in the dark, stopping transpiration happening, so that the plant doesn't dry out they close when water supply from the roots start to dry up - but it does stop the plants from photosynthesizing 2 of 3 Ions required for plant growth Nitrates they contain nitrogen which is necessary to make amino acids and protein they are needed for cell growth a defficiency would cause a stunted growth and older leaves will turn yellow Phosphates contains phosphorus to make DNA and cell membrane needed for respiration and growth too a defficiency would cause poor root growth and older leaver to turn purple Potassium helps the enzymes needed for photosynthesis and respiration a defficiency would cause poor flower and fruit growth and discoloured leaves Magnesium is significant because it is required to make chlorophyll a defficiency would cause yellow leaves 3 of 3
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