棉花纤维是由种子壳的表皮单细胞发育而成。细胞伸长期约20天,随后次生壁加厚20多天,两个过程间有重叠。纤维发育相继进行的知识提供考察胁迫因子影响的框架。在生物系统内一定有限制因素。不然一个纤维细胞将无限伸长和/或者次生壁将不断加厚,使纤维细胞变成实心的圆柱体。我们了解给定的品种只发育为定长的纤维,进而,纤维次生壁只加厚特定的数量。所以,可以推论纤维长度和次生壁加厚都受遗传控制。生育的环境条件决定纤维长度和次生壁加厚能否达到遗传系统的潜势。偏离最适宜生育条件或者称为胁迫,将影响发育的速度和最 Cotton fiber is derived from the seed shell epidermal single cell development. Cell elongation of about 20 days, followed by secondary wall thickening of more than 20 days, there is overlap between the two processes. The successive knowledge of fiber development provides a framework for examining the effects of stress factors. There must be some constraints in the biological system. Otherwise one fibroblast will stretch indefinitely and / or the secondary wall will continue to thicken, turning the fibroblasts into a solid cylinder. We understand that given varieties grow only to fixed-length fibers, and that the secondary walls of fibers thicken only a specific amount. Therefore, it can be inferred that both fiber length and secondary wall thickening are genetically controlled. The environmental conditions of fertility determine whether the fiber length and secondary wall thickening can reach the potential of the genetic system. Deviation from the most suitable reproductive conditions or stress, will affect the development speed and most