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彩色豆马勃与松树形成内外生菌根的研究
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彩色豆马勃与松树形成内外生菌根的研究
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Journal Article
彩色豆马勃与松树形成内外生菌根的研究
2003
Overview
采用组培菌根合成技术、纸—三明治菌根快速合成技术和圃地截根菌根化育苗技术使彩色豆马勃RG310和RG49菌株在马尾松、火炬松、湿地松上形成内外生菌根，不同菌根化技术形成菌根的过程和类型有差异。在组培菌根合成的条件下，菌与根接触后的第3—4d首先开始形成菌丝套，第8d开始形成哈蒂氏网，第18d菌丝进入皮层细胞内，哈蒂氏网由单列变为多列菌丝细胞组成；采用纸—三明治菌根快速合成技术进行截根菌根化，促进了菌根真菌的定殖，以截面伤口侵入为主要的侵入方式，扩大了根内外菌根侵染区(MIZ)，定殖、侵染同时发生，菌丝套、哈蒂氏网和胞内菌丝结构几乎同时形成，仅在2．5h内就开始形成，菌根真菌的菌丝进入了内外皮层和髓部；采用圃地截根菌根化育苗技术，仍然形成内外生菌根，但菌丝不侵入内皮层以内的根组织。根据研究提出“菌根类型”假说，即树木形成的菌根类型不但随菌根真菌和树木种类而异，而且随菌根化方法、生态条件等其它因子而异。
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