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What is it???

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stigma style ovary ovule carpel Note: Petals not shown in order to simplify diagram

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Flower Structure Pollination Fruit Development Seed Dispersal Germination Test

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After fertilisation the petals, stamen and sepals fall off. The ovule turns into a seed, the fertilised egg inside develops into an embryo plant. Testa: tough seed coat Micropyle: Hole made by pollen tube Embryo plant Cotyledon: Food store (contain starch and protein and also enzymes) Plumule: Embryo shoot Radicle: Embryo root Flower Structure Pollination Fruit Development Seed Dispersal Germination Test

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Seeds can be dispersed by: Wind Water Mechanical Animals

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Water enters the seed through the micropyle and activates enzymes. The water also softens the testa to allow it to split. Flower Structure Pollination Fruit Development Seed Dispersal Germination Test Plumule (embryo shoot) Radicle (embryo root) Micropyle Testa Cotyledon

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starch embryo plant amylase secreted maltose absorbed The enzymes break starch down into maltose and then glucose. The glucose is used in respiration to provide energy for growth Plumule Radicle This is the first part to grow out of the seed as it needs to absorb more water Flower Structure Pollination Fruit Development Seed Dispersal Germination Test

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Seed loses weight as it uses up starch stores in the cotyledons as the seedling cannot photosynthesise yet Days Dry mass/g Dry mass is the mass of solid matter with all water removed Weight increases as the seedling can photosynthesise and plant grows

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light soil germination Plant growth and development The seedling can now photosynthesise and make its own food

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4oCA4oCA moist dry Warm B Warm C Warm D Warm E Oxygen present No oxygen No light Pyrogallol (absorbs oxygen)