Adaptations Of A Leaf To Maximise Photosynthesis | …
These are tiny pores underneath the leaf which allow gases to enter and leave the leaf. These include the gases which are vital for photosynthesis and water vapour. If the plant is in conditions the stomata will close to retain water within the plant. While this is useful in the short term, it cannot carry on long term as the plant will not have access to carbon dioxide and will, therefore, be unable to photosynthesise to produce the energy it needs to survive.
Structure of the Leaf | Plant Biology ..
Leaves usually have a distinctive upper and a lower surface. The outermost layer of cells of the leaf forms the epidermis. Various types of hairs or trichomes may project from the epidermis. Between the upper and lower epidermis, most of the plant’s green, chlorophyll bearing cells are found. This is where most of the photosynthesis occurs in the plant. Here water and carbon dioxide are combined to make sugars and release oxygen. This tissue is called mesophyll and may be further differentiated into palisade mesophyll where the cells are elongated and densely packed and spongy mesophyll where the cells are irregularly shaped with lots of spaces between them. The epidermis is perforated with openings through which gases enter and exit the leaf. These holes are called stomates. Two cells (called guard cells) regulate the opening and closing of the stomates and thereby control the movement of carbon dioxide, oxygen and water vapor into and out of the leaf. The veins of the leaf are pathways for food and water movement and contain the xylem and phloem which connect to this same vascular tissue in the stem.
Next, a leaf was retrieved from the top of a bean plant and sealed from the air in the laboratory via thumbscrews inside the leaf chamber of the apparatus....
The adaptations of leaf for photosynthesis are as ..
LEAF. The most conspicuous organs of plants in the geranium family (Geraniaceae) are the leaves. Leaves are the green food-making parts of the plant. The leaves consist of two major parts: the petiole and the blade or lamina. The petiole is the stalk at the base of the leaf where the leaf is attached to the stem or node. The leaf blade is the thin, flat, wide portion of the leaf. Here is the greatest concentration of food-making structures in the plant. At each node, small flaps of tissue called stipules may be found. These are usually considered part of the leaf and vary in size, shape and structure from species to species. In some plants these stipules are hardened and spiny (). In others, they are large and green (especially in ). In many species of the Geraniaceae, the leaves persist from season to season and the plants are considered evergreen; but other species from desert areas shedtheir leaves seasonally and are called deciduous. These are terms we are familiar with; coniferous (cone-bearing) plants are generally evergreen, while many trees shed their leaves in the fall and are leafless during the winter. Many species of from the Mediterranean climate of South Africa are deciduous, buttheir leaves are green during the winter (the wet season) and are shed during the summer (the dry season). Leaves vary considerably in size and shape and are important in the identification of the various species of Geraniaceae.
What is the adaptation of leaf for photosynthesis? - …
Transpiration and water loss from leaves happen because of the way that leaves are adapted for efficient photosynthesis. The flat, thin shape of a leaf, its spongy mesophyll layer and stomata are adaptations that also allow water loss from the leaf. Features involving the around the stomata provide a way to reduce excessive water loss.
What is the adaptation of leaf for photosynthesis
STEM. The stem forms the main axis of the plant. It carries the leaves and is anchored to the ground by the root. If the stem is strong and woody, as in trees, we would call it the trunk. The principle function of the stem is to support the leaves, flowers and fruits. If the stem is elongate, it distributes the leaves through space. The place on a stem where a leaf is attached is called a node (white arrow) and the section of stem between nodes is called the internode (yellow arrow). In some species (), the stem is very short (sometimes described as “absent”), in which case the leaves grow close to the ground. In species like the stem is swollen at intervals giving the common name of “gouty geranium.” Many of the species which grow in seasonally dry or desert areas have succulent or semi-succulent stems. Such stems store water internally. Some species () have spiny stems with prickly, hardened projections from the surface. Such adaptations discourage animal grazers from eating the plants.