Discovering Plants

A reproductive organ of the seed bearing

plants .

An aerial and upright part of the plant that

usually bears the leaves, flowers,

and fruits

Are usually subterranean organ of a plant used for the anchorage to

the soil.

a flat broad structure

responsible for the production of food, transpiration, and

respiration.

Parts of plant

leaves

Parts of plant

LEAVES – are flat broad structure responsible for the production of food, transpiration, and respiration.

Blade- or lamina, is the broad, flat part of the leaf. Photosynthesis occurs in the blade, which has many green food-making cells.

Petiole- the stemlike part of the leaf that joins the blade to the stem

Stipules- two small flaps that grow at the base of the petiole of some plants

Small Netted Vein- are so small that they have only one or two veins running through the center of the blade.

Veins- carry food and water in a leaf. They also support the blade, much as the metal ribs support the fabric of an open umbrella.

Midbrib- Pinnately veined leaves have one large central vein, which extends from the base of the blade to its tip.

Roots- are usually subterranean organ of a plant used for the anchorage to the soil.

A primary root develops from a plant's seed and quickly produces branches called secondary roots.

Root cap- The tip of each root. Protects the delicate tip as it pushes through the soil.

Root hairs-Threadlike, grow farther back on the root. These hairs greatly increase the plant's ability to absorb water and minerals from the soil.

Stems- are aerial and upright part of the plant that usually bears the leaves, flowers, and fruits. Node: The place on the

stem where a leaf, branch, or root is attached (or has been attached).

Sheath: A tubular part surrounding another part, often papery. in pondweeds, the portion of the leaf that surrounds the stem.

FLOWERS- are reproductive organ of the seed bearing plants .

Ovary The part of the plant that contains the ovules. Ovule The part of the ovary that becomes the seeds. Petal The colorful, often bright part of the flower (corolla). Sepal The parts that look like little green leaves that cover the outside of a flower bud (calix).

• Epicotyl = the shoot (stems and leaves) of the embryonic plant

• Radicle = embryonic root• Hypocotyl = connection

between cotyledon and radicle• Cotyledon = seed leaf• Seed coat = protective covering

 SEED- is a small embryonic plant enclosed in a covering called the seed coat, usually with some stored food

How Plants Grow and Multiply

Plants contribution

into our environment

and to us.

Most plants grow from seeds

Sexual ReproductionThe pistil and the stamen

are parts of the flower that are responsible in the

making of seeds in flowering plants

Is the male reproductive organ. It consist of stalk called the filament and an ovoid structure at its tip called the anther. The anther bear the pollen grains.

Stamen

Pistil The pistil is the female reproductive organ found at the center of the flower. It consist of the ovary ,style, and the stigma. An egg cell is formed in the ovule. The ovules, after fertilization, will develops into seed and the ovary surrounding it becomes the fruit of most plants.

Pollination

One of the important function of the flower is to produce seeds.

How?

Pollination

If seeds are to be produced, the pollen grains from the anther must land on the stigma. This transfer of pollen grains to the stigma is called

Pollination

Pollination

Pollination occur mainly by wind and by animals such as insects and birds.

Pollination Self pollination When pollen from

a plant’s anther is transferred to that same plant’s stigma, it is called self pollination.

Pollination Cross pollination

When pollen from a plant’s

anther is transferred to

another plant’s stigma it is called

cross pollination.

What is fertilization? How does fertilization in flowers lead to the formation of seeds?