黑松3种菌根解剖结构差异及其与生长的关系

将黑松分别接种黄色须腹菌(Rhizopogen luteous,简称Rl)、彩色豆马勃(Pisolithus tinctorius,简称Pt)和美味牛肝菌(Boletus edulis,简称Be),研究了不同菌根横截面解剖结构的差异及其对黑松生长的影响。结果表明,不同菌根横截面中,中柱、皮层、菌套的结构以及哈氏网的分布均有较明显差异,且与黑松生长有一定的相关性。生长较好的Rl和Pt菌根苗其根具有较小的中柱和较大的皮层,皮层细胞间密集分布着高度分支的哈氏网菌丝;生长一般的Be菌根则形成较大的中柱和较小的皮层,皮层细胞间哈氏网菌丝较少。菌套的厚度与黑松生长无明显相关性,但Rl和Pt菌根的菌套排列紧密,形成拟薄壁组织,似与黑松根成为一体。Be菌根菌套排列相对松散,可见菌丝分隔;CK菌套菌丝排列疏松,不规则或平行排列。由此可见,相同条件下形成的不同菌根其解剖结构有所差异,并对宿主植物生长有一定的影响。

Relationships between the difference of ectomycorrhizal root anatomical structure and the growth of three kinds of Pinus thunbergii seedlings

We studied the anatomical structure changes of the different ectomycorrhizal roots of Pinus thunbergii seedlings inoculated with Rhizopogen luteous(Rl),Pisolithus tinctorius(Pt),and Boletus edulis(Be).The results indicated that the anatomical structures of the ectomycorrhizas showed significantly difference in stele,cortex,mantle structure and Hartig net distribution after 14 months of inoculation compared to non-inoculated seedlings(the control).The ectomycorrhizas inoculated with Rl and Pt had smaller stele and larger cortex in root cross section,and highly-branched Hartig net hyphae were distributed among cortical cells.The thickness of mantle was not obviously correlated with the seedling growth in all treatments,but pseudoparenchymatous in the mantles inoculated with Rl and Pt were developed,and well integrated with the roots.Our study helped to understand the mechanism of plant growth promoting by mycorrhizal fungi.