Difference between Palisade Parenchyma and Spongy Parenchyma - QS Study
QS Study

Difference between Palisade parenchyma and Spongy parenchyma

Palisade parenchyma:

Palisade parenchyma is the upper layer of ground tissue in a leaf, consisting of elongated cells beneath and perpendicular to the upper epidermis and constituting the main area of photosynthesis.

  1. Present in dorsiventral leaves.
  2. Columnar cells without intercellular spaces, compactly arranged.
  3. Contain more amount of chloroplasts.
  4. Do not possess respiratory cavity.
  5. Present below the upper epidermis.
  6. These are there below the upper epidermis in dorsiventral leaf.

Spongy parenchyma

Spongy parenchyma the lower layer of the ground tissue of a leaf, typically containing irregularly shaped cells with relatively few chloroplasts and large intercellular spaces.

  1. Present in both dorsiventral and isobilateral leaves.
  2. Rounded cells with intercellular spaces, loosely arranged.
  3. Contain less amount of chloroplast.
  4. Possess respiratory cavity and open to outside through stomata.
  5. Present below the palisade layer in dorsiventral leaf and between both the epidermis is isobilateral leaf.
  6. These are there towards the lower epidermis in dorsiventral leaf.