Campbell Gerard, Shelton Peter
Department of Zoology, University of Leicester, Adrian Building, University Road, Leicester LEI 7RH, UK
Development. 1987 Oct 1;101(2):221-35. doi: 10.1242/dev.101.2.221.
The confrontation of cells from the anterior region of an abdominal segment of Oncopeltus with those from the posterior region of the same or the adjacent segment results in the generation of a segment border. The behaviour of epidermal cells during this regulation is described. It consists primarily of cell division and transverse elongation of cells at the site of confrontation. This behaviour can be separated from any associated purely with wound healing because a similar-sized wound to that used to ablate the segment border, performed within the segment, does not result in any cell division or elongation. The results are consistent with the view that there is a discontinuity in positional values at the segment border. The stability of such a discontinuity and the regeneration of segment borders are discussed in terms of there being a special population of cells at the segment border that have the property of isolating other cells with the maximum difference in positional values.
将瘤蝽腹部某一节段前部区域的细胞与同一节段或相邻节段后部区域的细胞相对放置，会形成节段边界。本文描述了表皮细胞在这种调节过程中的行为。其主要包括细胞分裂以及在相对放置部位细胞的横向伸长。这种行为可以与任何单纯与伤口愈合相关的行为区分开来，因为在节段内部制造一个与用于消融节段边界的伤口大小相似的伤口，并不会导致任何细胞分裂或伸长。这些结果与节段边界处位置值存在不连续性的观点一致。本文从节段边界存在一类特殊细胞群体的角度，讨论了这种不连续性的稳定性以及节段边界的再生，这类特殊细胞群体具有隔离位置值差异最大的其他细胞的特性。
