Theory of the outer garment and the inner body - Gainainaitaisetsu

…Several theories have been proposed about the structure of the shoot apex, or apical meristem. These include the apical cell theory, which states that a single initial cell is at the apex and from which each part of the stem is formed; the prototissue theory, which recognizes the layered meristem from which each tissue originates; the vegetative endothelium theory, which only captures the layered structure of the shoot apex without regard to the origin of each tissue; the standby meristem theory, which holds that the most extreme tip of the shoot apex is a dormant meristem during the vegetative stage and that the primordial ring surrounding it is the most active; and the cell tissue theory, which distinguishes the structure of the shoot apex by recognizing cell groups based on the characteristics of the cells. The structure of the shoot apex varies depending on the plant group and the condition of the stem, but generally, most ferns are of the apical cell type, gymnosperms are of the apical cell group type, and angiosperms are of the compound type, in which the initial cells themselves have a layered structure. …

*Some of the terminology that refers to the "inner garment theory" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…茎頂すなわち頂端分裂組織の構造についてはこれまでいくつかの説が提唱されている。単一の始原細胞が頂端にあって，それから茎の各部分がつくられるとする頂端細胞説，各組織が由来する層状構造の分裂組織を認めた原組織説，各組織の由来を問わずに茎頂の層状構造だけをとらえた外衣内体説，茎頂の最先端は栄養期には不活発な分裂組織であって，それをとり囲む始原環が最も盛んに活動するとみる待機分裂組織説，細胞の特徴によって細胞群を認識し茎頂の構造を分けた細胞組織説などがある。　茎頂の構造は植物群や茎の状態によってさまざまであるが，一般にはシダ植物の多くでは頂端細胞型，裸子植物などでは頂端細胞群型，被子植物では始原細胞自身が層状構造をもつ複層型である。…

※「外衣内体説」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報