palisade parenchyma

plant tissue

Also known as: palisade cell, palisade mesophyll

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July 1, 2026

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The term "palisade parenchyma" refers to a specific type of plant tissue. It is a layer of columnar cells found beneath the upper epidermis of leaves. These cells are rich in chloroplasts, which are essential for photosynthesis. Palisade parenchyma is also known as palisade mesophyll or palisade tissue. It is one of the internal layers of a leaf, distinct from the spongy parenchyma, which lies below it and contains air spaces. Parenchyma cells, in general, are living, thin-walled, and adaptable, performing various functions like photosynthesis, secretion, and food storage.123

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angiosperm
Leaves
…divided into two regions: the palisade parenchyma, located beneath the upper epidermis and composed of columnar cells oriented perpendicular to the leaf surface, and spongy parenchyma, located in the lower part of the leaf and composed of irregularly shaped cells. The veins contain primary xylem and phloem and are enclosed…
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…divided into two regions: the palisade parenchyma, located beneath the upper epidermis and composed of columnar cells oriented perpendicular to the leaf surface, and spongy parenchyma, located in the lower part of the leaf and composed of irregularly shaped cells. The veins contain primary xylem and phloem and are enclosed…
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fern
Tissues
…upper mesophyll is composed of palisade cells—elongated cells arranged parallel and oriented with the long axis vertical to the leaf surface. The veins range from the massive major midribs, or rachises, which have well-defined xylem, phloem, pericycle, and endodermis, to the delicate capillaries represented by little more than a single…
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…upper mesophyll is composed of palisade cells—elongated cells arranged parallel and oriented with the long axis vertical to the leaf surface. The veins range from the massive major midribs, or rachises, which have well-defined xylem, phloem, pericycle, and endodermis, to the delicate capillaries represented by little more than a single…
Read More