Stalk formation in Dictyostelium
Stalk formation in Dictyostelium
复制标题
DOI：
10.2307/2482103
复制
发表时间：
1952-01-01
期刊：
影响因子：
--
通讯作者：
FENNELL, DOROTHY I.
中科院分区：
文献类型：
--
作者：
RAPER, KENNETH B.;FENNELL, DOROTHY I.
Sorocarps in D. discoideum和相关的spp.是由大量分离但明显协调的变形虫样细胞有序分化形成的。孢子囊由一层纤维素外鞘组成，外鞘包围着一列紧密紧密的、强烈液泡化的髓样细胞。鞘出现在明显的细胞分化之前，并且由纤维素在关键圆形区域中的细胞外沉积形成，其尺寸与合作的粘液阿米巴的质量成比例。负责解除sorogen到空气中的主要力量的结果，从膨胀的柄细胞被困在伸长sorophore鞘;第二个和逐渐减少的力的结果，从协调伪足运动的粘阿米巴，包括sorogen。测试表明，sorophore鞘（胞外来源）在纤维素的性质包括：染色反应，溶解度，在偏振光下的双折射，X-射线衍射图，纸色谱的水解产物，和分解纤维素破坏细菌。|| 摘要编辑：作者
Sorocarps in D. discoideum and related spp. are formed by the orderly differentiation of large numbers of separate but clearly coordinated amoeboid cells. The sorophore consists of an outer sheath of cellulose surrounding a column of closely compacted, strongly vacuolated, pith-like cells. The sheath appears in advance of obvious cell differentiation and is formed by the extracellular deposition of cellulose in a critical circular zone, the dimensions of which are proportional to the mass of cooperating myxamoebae . The principal force responsible for lifting the sorogen into the air results from the swelling of stalk cells entrapped in the elongating sorophore sheath; a second and progressively diminishing force results from the coordinated pseudopodial movements of the myxamoebae that comprise the sorogen. Tests which indicate that the sorophore sheath (of extracellular origin) in cellulosic in character include: staining reactions, solubilities, birefringence in polarized light, X-ray diffraction pattern, paper chromatography of hydrolysis products, and decomposition by cellulose-destroying bacteria. || ABSTRACT AUTHORS: Authors