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Photosynthesis

PHOTOSYNTHESIS

Photosynthesis

Photosynthesis

The process of plants using sunlight to make sugars from water and carbondioxide is called photosynthesis. Photosynthesis takes place in leaves which contains the chlorophyll, the green pigment. The green pigment chlorophyll gets energy from sunlight and after chemical reaction, it produces glucose and water. During such process of photosynthesis, the carbondioxide is taken in and the oxygen is produced out as waste product.

green leaf

green leaf

Sunlight has different kind of rays or wavelengths. The red light or rays is important for the process of photosynthesis. The red rays are absorbed by the green pigment chlorophyll in the leaves. The other rays of the sun are reflected and make the plant look green.

The water is taken up from the soil through roots for the process of Photosynthesis. The water travels up the xylem tissue in the stem to the leaves. The water molecules inside the chloroplasts are split apart during the photosynthesis and produces hydrogen ions and oxygen molecules.

Glucose produced during photosynthesis is a simple sugar. All the energy needed for growth and reproduction of the plant is obtained from it. Plant uses glucose and other minerals including starch for its growth. Starch acts as an energy store. Plant’s cell wall is built by cellulose.

section of stem

section of stem

Xylem: It is a tube through which the water and dissolved minerals passes up the roots, stems and trunk of a plant. Xylem transports water and dissolved minerals.

Phloem: Xylem is made up of non-living cells with walls. Sugars which are formed in the leaves are dissolved in cell sap and are carried to all the parts of a plant in living cells called the phloem. Phloem transports dissolved sugar.

Transpiration: The process of evaporation of water that reaches the leaves through stomata is called Transpiration. The plant controls the transpiration through its stomata. The roots take the water from the soil. After taking the water to the parts that needed water, it evaporates through the leaves.

Chlorophyll: This green pigment is found inside the micro structures called chloroplasts. The chloroplasts are found in the cells of a leaf. Each leaf contains millions of chloroplasts. The chlorophyll molecules are contained in stacks of membrane in each chloroplast.

Carbondioxide: During the process of Photosynthesis, carbondioxide enters the leaves through micro pores called stomata.

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