Brundrett Mark, Kendrick Bryce
Department of Biology, University of Waterloo, Waterloo, Ontario, Canada N2L 3G1.
New Phytol. 1990 Mar;114(3):469-479. doi: 10.1111/j.1469-8137.1990.tb00415.x.
The morphology of vesicular-arbuscular (VA) mycorrhizas in the roots of five species of herbaceous woodland plants, in which root growth and mycorrhiza formation were quantified in the first part of this study was examined. The root anatomy of these species was also examined in detail, using various staining procedures to observe cell wall structure, especially in the region where mycorrhizal colonization was initiated. The morphology of mycorrhizal colonies within the roots of these species was observed at different stages of development using light microscopy. It was found that modifications of endodermal and exodermal cell-walls could determine the way in which fungi entered the roots. It was also found that properties of the cortex considerably influenced the localization of hyphae and arbuscules within roots. Features of VA mycorrhizas that were probably associated with particular endophytes were also noted. It is considered likely that some aspects of root structure have evolved means of regulating the efficiency of mycorrhizal associations.
对五种草本林地植物根系中的泡囊-丛枝（VA）菌根形态进行了研究，在本研究的第一部分已对这些植物的根系生长和菌根形成进行了量化。还使用各种染色程序详细检查了这些植物的根解剖结构，以观察细胞壁结构，特别是在菌根定殖开始的区域。使用光学显微镜在不同发育阶段观察了这些植物根系内菌根菌落的形态。发现内皮层和外皮层细胞壁的修饰可以决定真菌进入根系的方式。还发现皮层的特性极大地影响了菌丝和丛枝在根系内的定位。还注意到VA菌根可能与特定内生菌相关的特征。据认为，根系结构的某些方面可能已经进化出调节菌根共生效率的方式。
