What is abaxial and adaxial epidermis?

The adaxial and abaxial epidermal cells have different complexities and different cuticular thicknesses. The adaxial palisade mesophyll cells are oblong in shape, densely packed and contact with each other, while the abaxial spongy mesophyll cells are uneven in shape and have air spaces between them.

What is adaxial epidermis?

The Adaxial Epidermis generally has a thick cuticle on the upper (adaxial) surface. Secretory & Non-secretory Trichomes may be present. Stomata may occur on the upper epidermis but these are most frequent on the lower (abaxial) surface. The Abaxial Epidermis usually has a thin cuticle.

What is the abaxial leaf surface?

The abaxial (lower) domain of the leaf consists of an epidermis with abundant stomata and spongy mesophyll cells, which function in gas exchange and the regulation of transpiration. The leaf vasculature is also aligned along the adaxial–abaxial axis, with xylem tissue differentiating adaxially and the phloem abaxially.

What is the abaxial?

Definition of abaxial : situated out of or directed away from the axis the abaxial or lower surface of a leaf.

What is abaxial phloem?

The xylem typically lies adaxial with phloem positioned abaxial. In a stem or root this means that the xylem is closer to the centre of the stem or root while the phloem is closer to the exterior. In a leaf, the adaxial surface of the leaf will usually be the upper side, with the abaxial surface the lower side.

Where is abaxial epidermis located?

Typically, the stomata are more numerous over the abaxial (lower) epidermis of the leaf than the (adaxial) upper epidermis. An exception is floating leaves where most or all stomata are on the upper surface. Vertical leaves, such as those of many grasses, often have roughly equal numbers of stomata on both surfaces.

Which side of the leaf has more stomata adaxial or abaxial?

First, stomatal density is usually higher on the abaxial surface than it is on the adaxial surface of leaves (Willmer and Fricker, 1996a).

What is bifacial leaf?

A dicotyledonous leaf is also called dorsiventral or bifacial leaf. For example, mango leaves, banyan leaves and oleander leaves. These leaves are hypostomatic (stomata mostly on the lower epidermis). Mesophyll tissues present in these leaves are differentiated into palisade and spongy.

What is leaf primordia?

a group of cells that will develop into a leaf, seen as small bulges just below the shoot apex.

What is dorsal and ventral side of leaf?

Thelower side of leaf is the dorsal while the side facing the sun or upper side is ventral. Side of the leaf facing towards the sunlight, have more chlorophyll content and hence more green in color, is the ventral side of leaf while side which is facing toward the soil is dorsal side of the leaf.

How is Dorsiventral leaf different from an Isobilateral leaf?

Anatomy of Flowering Plants, Anatomy of Dicotyledonous and Monocotyledonous……

Dorsiventral Leaf Isobilateral Leaf
The number of stomata is more on the abaxial epidermis than the adaxial epidermis. Almost equal number of stomata is present on the abaxial and adaxial surfaces.