Reproduction In Flowering Plants

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Information about Reproduction In Flowering Plants
Education

Published on August 12, 2007

Author: cpisola

Source: slideshare.net

Description

Este trabajo fue realizado por la alumna Paulita de Carabasa de segundo año de Polimodal, a partir de los contenidos de Biology.
Gracias!!! Paula. Excelente trabajo...

Reproduction in flowering plants

Flower Structure PETALS: These are usually brightly coloured and sometimes scented. They are arranged in a circle or a cylinder. The petals attract insects to the flower, the insects may bring about pollination. CARPEL : These are the female reproductive organs. Each carpel consists of an ovary, bearing of style and a stigma. Inside the ovary there are one or more ovules. The stigma has a sticky surface and pollen grains will stick to it during pollination. The style may be too long or too short. SEPAL: They are often green and much smaller than the petals. They may protect the flower when it is in the bud. STAMEN: These are the male reproductive organs. Each stamen has a stalk called the filament, with an anther at the end. Each anther consists of 4 pollen sacs.

Lupin : The Lupin has: five sepals forming a tube The uppermost petal is called Standard. It is held vertically Two petals at the sides called Wings. The Wings have two more petals forming a boat shaped keel. One carpel with about 10 ovules in the ovary 10 Stamens. 5 long ones and 5 short ones. Their filaments are joined together at the base to form a sheath round the ovary.

The Lupin has:

five sepals forming a tube

The uppermost petal is called Standard. It is held vertically

Two petals at the sides called Wings. The Wings have two more petals forming a boat shaped keel.

One carpel with about 10 ovules in the ovary

10 Stamens. 5 long ones and 5 short ones. Their filaments are joined together at the base to form a sheath round the ovary.

Pollination Self-pollination: The pollen which reaches the stigma comes from the same flower or another flower on the same plant. Cross-pollination: Pollen is carried from the anthers of one flower to the stigma in a flower of another plant of the same species. The transfer of pollen from the anthers to the stigma.

Fertilization When the male sex cell and the female sex cell fuse or meet together. The polen grain absorbs liquid from the stigma and a microscopic pollen tube grows out of the grain. This tube gorws down into de ovary where it enters a small hole, the micropyle in an ovule. The nucleous (of tje pollen) travells down the pollen tube and enters the ovule.

The polen grain absorbs liquid from the stigma and a microscopic pollen tube grows out of the grain. This tube gorws down into de ovary where it enters a small hole, the micropyle in an ovule. The nucleous (of tje pollen) travells down the pollen tube and enters the ovule.

Dispersal of fruits and seed . They are carried along distances from the parent plant. This reduces competition for light, water and space between same species. Parachute fruits and seeds: Mammals and hooked fruits Winged fruits Brids, mammals and succulent fruits Explosive fruits. WIND DISPERSAL ANIMAL DISPERSAL

They are carried along distances from the parent plant. This reduces competition for light, water and space between same species.

Kinds of Flowers

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