Department of Biology, Carleton University, K1S 5B6, Ottawa, Ont., Canada.
Planta. 1983 Dec;159(6):497-504. doi: 10.1007/BF00409138.
Differences in plasmodesmatal organization and frequency between cells which have and have not undergone wall expansion, were studied in four plant species (Trifolium repens L., Raphanus sativus L., Zea mays L., Sorghum vulgare L.). Plasmodesmatal disposition ranged from single dispersed to clustered into primary pit-fields. As the result of wall expansion (i.e. by comparing meristematic and elongate cells) there is a general shift from dispersed to clustered plasmodesmata. Plasmodesmatal frequency over the cell surface (number/μm(2)) does not decline as the result of wall expansion and cell elongation, thus indicating that secondary formation of plasmodesmata is a naturally occurring process during cell elongation, its extent being highest in Zea mays and lowest in Trifolium repens. The concurrent increases in frequency and clustering of plasmodesmata indicate that secondary formation may primarily occur in close proximity to pre-existing plasmodesmata.
在四个植物物种（三叶草、萝卜、玉米和高粱）中，研究了细胞壁扩张前后细胞之间胞间连丝的组织和频率差异。胞间连丝的排列从单个分散到初级孔场聚集。由于细胞壁的扩张（即通过比较分生组织细胞和伸长细胞），胞间连丝从分散到聚集的转变。细胞壁扩张和细胞伸长过程中，胞间连丝在细胞表面的频率（/μm(2)）并没有下降，这表明次生胞间连丝的形成是细胞伸长过程中的自然发生的过程，其程度在玉米中最高，在三叶草中最低。胞间连丝频率和聚集的同时增加表明，次生形成可能主要发生在与现有胞间连丝相邻的位置。
