Permanent tissue

Japanese: 永久組織 - えいきゅうそしき
Permanent tissue

This refers to tissues in plants, such as the epidermis, parenchyma, and vascular bundles, that are fully mature and perform certain functions. It is also called permanent tissue, and is the opposite of meristematic tissue. The cells that make up the tissue do not usually divide or change any further, hence the name. However, when the abscission layer or cork cambium is formed, cell division occurs in certain places within the parenchyma. Cell division can also begin again when the plant is injured, or when part of the tissue is cultured, resulting in new differentiation.

[Kengo Souma]

Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend

Japanese:

植物体の表皮、柔組織、維管束など、成熟完成して一定の機能を果たしている組織をいう。永存組織ともいい、分裂組織の対語。構成細胞は通常は分裂せず、またそれ以上変化しないためこの名がある。しかし離層やコルク形成層ができるときには、柔組織内の一定の場所で細胞分裂がおこる。また植物体が傷を受けたとき、あるいは組織の一部を培養するときなどにもふたたび細胞分裂が始まり、新たな分化がおこることがある。

[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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