PLANT NUTRITIONRicardo Serrano

Soria

Autotrophic nutrition in the plantPlants have an autotrophic nutrition because they can produce their own organic matter. They can do this through some processes like the photosynthesis. This processes are: Absorption Transport of the raw sap Gas exchange and transpiration Photosynthesis Transport of the elaborated sap Metabolism and cell respiration Excretion

AbsorptionIn this process the plant takes water and mineral salts from the ground inside the roots. Roots hair extend their surface to absorb more water.This inorganic nutrients are called raw sap (water + mineral salts).

Water and mineral salts

Roots

SoilOrgans: roots

Transport of raw sap

Xyleme vessels

The transport starts in the roots where the xyleme vessels are. Then the raw sap travels up often to the leaves.

Organs: stem

Gas Exchange and transpiration

The gas exchange takes place in the leaf stomata. Carbon dioxide enters and the oxygen leaves the plant through the stomata as well water in transpiration.

CO2

O2

Raw sap

H2O Organs: back of the leaves

PhotosynthesisIn the chloroplast the raw sap ix produced using CO2, H2O, mineral salts and sunlight.CO2 + Raw sap + sunlight = glucose + O2Oxygen is expulsed from the body and glucose form the elaborated sap.

CO2

O2

Raw sap

Raw sap

Raw sap

Glucose

Sunlight

Organs: green parts of the plant

Transport of elaborated sap

Phloem vessels

This sap is transported from the green parts of the plant to the roots an other parts in the phloem vessels.

Organs: stem

Metabolism and cell respiration

- Glucose is transformated into complex organic substances in the anabolism. - Glucose is used in cell respiration in the mitochondrion. glucose + O2 = H2O + CO2 + Energy

CO2

O2

Raw sap

H2O

Glucose

Energy

Organs: all the cells of the plant

Excretion

The elimination of waste gases is produced in the stomata in the gas exchange and the transpiration.The other waste products are used in chemical reactions or are accumulated in the cell vacuoles because plants haven´t got specials organs for excretion.

Raw sap

Waste products Organs: all

the cells of the plant

Autotrophic nutrition in the cellDepending on energy source used, two processes may take place:1.- The cell takes in water, carbon dioxide and mineral salts from the outside. Using sunlight, organic matter is produced. In the process, oxygen is released from the cell.2.- Part of the organic matter produced is used in the mitochondrion, where catabolism takes place. Using oxygen, energy and inorganic substances (water and carbon dioxide) are produced.3.- As a result of catabolism, carbon dioxide is produced and released outside.4.- Using energy from catabolism and simple molecules, complex organic molecules are produced (anabolism).