Stems and leaves

PowerPoint Presentation: 

Leaves Of Plants

How leaves are made: 

- Basically, leaves are formed by the coordinated efforts of several meristems, each is names for its position. How leaves are made

Stages: 

1 st stage: Leaf buttress or primordium . The earliest stage of development where you will find a small budge at the apex This is consist of 100-300 cells. 2 nd Stage: Apical peg. With a continuous cellular division and cellular expansion, a symmetrical cone is produced. This peg is consisted of an apical meristem and a procambial stand that eventually form a leaf’s midrib 3 rd stage: Adavial meristem. This is then formed to thicken the leaf Stages

Stages: 

4 th stage: Formation of the upper and lower leaf zone. This is formed when the leaf primordium is about 0.2 -0.5 mm high. Stages

Leaves: 

Leaves

Leaves: 

Leaves Typically a leaf is a thin, flattened organ borne above ground and specialized for photosynthesis, but many types of leaves are adapted in ways almost unrecognizable in those terms: some are not flat (for example many succulent leaves and conifers), some are not above ground (such as bulb scales), and some are without major photosynthetic function (consider for example cataphylls, spines, and cotyledons).

Functions of leaves: 

Functions of leaves Manufacture food for photosynthesis Respiration- Gas exchange Protect vegetative and floral buds Transpiration- Water transport Store food during germination

Photosynthesis: 

Photosynthesis Plants manufacture food through Photosynthesis Stage 1: Energy is captured from the sun Stage 2: Light energy is converted to Chemical energy Stage 3: Chemical energy powers formation of organic compounds, using Carbon Dioxide.

Structure of leaves: 

Structure of leaves

Structure of leaves: 

Structure of leaves In botany, the petiole ( / ˈpiːtɨoʊl / ) is the stalk attaching the leaf blade to the stem. The petiole usually has the same internal structure as the stem. In botany, stipule (Latin stipula : straw, stalk) is a term coined by Linnaeus which refers to outgrowths borne on either side (sometimes just one side) of the base of a leafstalk (the petiole). A pair of stipules is considered part of the anatomy of the leaf of a typical flowering plant, although in many species the stipules are inconspicuous or entirely absent (and the leaf is then termed exstipulate ).

Structure of leaves: 

Structure of leaves The Blade , or lamina , is the broad, flat part of the leaf. Photosynthesis occurs in the blade, which has many green food-making cells. Leaf blades differ from one another in several ways: (1) the types of edges, (2) the patterns of the veins, and (3) the number of blades per leaf. 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.

Structure of leaves: 

Structure of leaves Axil- the angle or point of divergence between the upper side of a branch, leaf, or petiole, and the stem or branch from which it springs. Epidermis is the outer layer of cells covering the leaf. Mesophyll primary location of photosynthesis

That concludes our report… ;) : 

That concludes our report… ;) Botalino Members: John Matthew Cruel Mart Russel Tacsuan Kyle Elijah M. Lucido Janielle Sabio Riza Martorillas Jesica Rosendo Patricia Bucayan Maegan portento