Spongy tissue - Cavernous tissue

Japanese: 海綿状組織 - かいめんじょうそしき
Spongy tissue - Cavernous tissue

One of the tissues that make up the mesophyll of plant leaves. It is named after the irregular cell shape and arrangement, abundant intercellular spaces, and its resemblance to a sponge. The surface side of the mesophyll is usually made up of palisade tissue, while the underside is made up of spongy tissue, both of which are assimilation tissues made up of cells rich in chloroplasts. The intercellular spaces are connected to the outside world through stomata, and serve as a place for gas exchange during photosynthesis and respiration, as well as a passageway for these gases.

[Kengo Souma]

Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend

Japanese:

植物の葉の葉肉(ようにく)を構成する組織の一つ。細胞の形や配列が不規則で細胞間隙(かんげき)に富み海綿に似ることからこの名がある。葉肉の表面側は通常は柵状(さくじょう)組織、裏面側は海綿状組織からなり、いずれも葉緑体に富む細胞からなる同化組織である。細胞間隙は気孔を通じて外界と連絡しているため、光合成や呼吸におけるガス交換の場として、またその通路として役だっている。

[相馬研吾]

出典 小学館 日本大百科全書(ニッポニカ)日本大百科全書(ニッポニカ)について 情報 | 凡例

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