…The cells are eukaryotic and heterotrophic, but they also have a single nucleus, amoeboid vegetative cells that ingest solid matter and digest it internally. The amoebae multiply by division, and when conditions are right, many amoebae gather together and form a pseudoplasmodium without fusing, and the whole body behaves as if it were a single body, appearing as a multicellular organism. Eventually, a fruiting body called a sorocarp is formed in the pseudoplasmodium. … From [Fungi]...The following classification system has been established based on the characteristics of these organs. (1) Mycomycota Also called slime molds, their body structure is amoeboid, and they form pseudoplasmodiums or plasmodiums. (2) Eumycota (fungi) Their body structure is mycelial, and they may be unicellular. ... From [Transformation]…In a group of slime molds generally known as cellular slime molds, a large number of amoeba-like cells gather together and behave in a coordinated manner as if the whole were a single organism, but fusion between the cells does not occur. This large number of cell aggregates are called pseudoplasmodium. [Takashi Kitagawa]. … *Some of the terminology explanations that refer to "pseudo-transformation" are listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…細胞は真核細胞で,従属栄養を営むが,単核のアメーバ状の栄養細胞があり,これが固形物を摂取し,体内消化する。アメーバは分裂して増え,条件が適すると多数のアメーバが集合し,融合することなく偽変形体pseudoplasmodiumとなり,全体があたかも一つの体のように行動し,多細胞生物のように見える。やがて,その偽変形体にソロカープsorocarpという子実体が形成される。… 【菌類】より…これらの器官の形質をもとに次の分類体系ができている。(1)変形菌門 粘菌類ともいわれ,体構造はアメーバ状,偽変形体pseudoplasmodiumあるいは変形体plasmodiumをつくる。(2)真菌門(真菌類) 体構造は菌糸状,単細胞のこともある。… 【変形体】より…一般に細胞性粘菌と呼ばれる一群の変形菌類では,多数のアメーバ状の細胞が集合して全体があたかも一つの有機体のように統制のとれた行動を示すが,細胞間の融合は起こらない。この多数の細胞の集合体を偽変形体pseudoplasmodiumという。【北川 尚史】。… ※「偽変形体」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 |
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