Translocation and transfer of nutrients in vesicular-arbuscular mycorrhizas. III. Polyphosphate granules and phosphorus translocation
Translocation and transfer of nutrients in vesicular-arbuscular mycorrhizas. III. Polyphosphate granules and phosphorus translocation
复制标题
囊泡-丛枝菌根中营养物质的易位和转移。
DOI：
--
复制
发表时间：
1980
期刊：
影响因子：
--
通讯作者：
P. Tinker
中科院分区：
文献类型：
--
作者：
G. Cox;K. J. Moran;F. Sanders;C. Nockolds;P. Tinker
摘要
X射线显微分析证实并测量了洋葱菌根中细胞化学显示的聚磷酸盐颗粒的磷含量(0.03g cm-3)。厚切片立体高压电子显微镜测得的颗粒体积为真菌体积的0.8%，光镜下测得土壤基质外菌丝的胞质流动速率约为12.6cmh-1。根据这些数据计算出磷的通量约为2.7×10-8molP·cm~(-2)·S~(-1)，这符合磷是通过胞质流动运输聚磷酸盐颗粒在真菌中运输的假说。
Summary
X-ray microanalysis has confirmed, and measured, the phosphorus content (0·03 g cm-3) of cytochemically-demonstrated polyphosphate granules in onion mycorrhizas. The volume occupied by the granules measured from stereoscopic high-voltage electron micrographs of thick sections was 0·8 % of the fungal volume, and cytoplasmic streaming rates of the extra-matrical mycelium in soil measured in the light microscope were around 12·6 cm h-1. From these data a flux rate of about 2·7 × 10-8 mol P cm-2 s-1 has been calculated, which fulfils the hypothesis that phosphorus is translocated in the fungus by means of the transport of polyphosphate granules by cytoplasmic streaming.