长白山笃斯越橘菌根形态结构及内生菌的分布特征

对长白山野生笃斯越橘菌根的形态结构及内生真菌的分布特征进行观察和分析。结果表明,笃斯越橘根的次生构造中,周皮由3～6层木栓细胞组成,其中最外1～2层呈凋落状,维管形成层和次生韧皮部均不明显,各占1～2层细胞。毛根包裹着1层或疏松或紧密的菌丝层,没有根毛;内生菌根真菌主要侵染周皮细胞,个别也有侵染木质部的情况,但没有改变根的基本解剖结构。初步观察发现,长白山笃斯越橘的根部具有欧石楠类菌根菌(ERM)、暗隔内生菌根菌(DSE)和泡囊-丛枝菌根菌(VAM)等三种类型菌根真菌的分布,含有菌丝体的表皮细胞壁具有明显加厚迹象。另外,几乎所有笃斯越橘毛根都有内生菌根真菌的寄生。

Morphology and structure of mycorrhiza and distribution of endophytic fungus in Vaccinium uliginosum L.in Changbai Mountain

Morphology and structure of the mycorrhiza and the distribution of the endophytic fungus in Vaccinium uliginosum L.in Changbai Mountain were observed and studied.The results showed that periderm was composed of 3-6-layer phellem cells in secondary root structure of the Vaccinium uliginosum L.,while vascular cambium and secondary phloem with 1-2-layer cells were not clear.The hair root was covered with mycelium layer loosely or tightly without root hair;endophytic fungus infected periderm and xylem without changing basic anatomic structure of the root.A preliminary observation indicated that the root of the Vaccinium uliginosum L.distributed in three types,ERM,DSE and VAM.Epidermal cell wall with the mycelium was obviously thickened.Furthermore,endophytic fungi were parasitic on the roots of all the Vaccinium uliginosum L..