VARIATION IN THE ABILITY OF ACREMONIUM ENDOPHYTES OF LOLIUM-PERENNE, FESTUCA-ARUNDINACEA AND F-PRATENSIS TO FORM COMPATIBLE ASSOCIATIONS IN THE 3 GRASSES
VARIATION IN THE ABILITY OF ACREMONIUM ENDOPHYTES OF LOLIUM-PERENNE, FESTUCA-ARUNDINACEA AND F-PRATENSIS TO FORM COMPATIBLE ASSOCIATIONS IN THE 3 GRASSES
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DOI：
10.1016/s0953-7562(09)80647-3
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发表时间：
1995-04-01
影响因子：
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通讯作者：
CHRISTENSEN, MJ
中科院分区：
文献类型：
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作者：
CHRISTENSEN, MJ
研究了多年生黑麦草、高羊茅和草甸羊茅内生菌的6个公认分类群(TGS)的代表性菌株在接种这3种牧草幼苗后形成亲和组合的能力。这6个菌株不是其自然寄主所特有的，最具代表性的菌株与所有3个寄主种都形成了联结，不亲和性导致多年生黑麦草-黑麦草联会中菌丝死亡。影响寄主组织的不亲和性，导致顶端分生组织区域的发育迟缓和坏死，出现在高羊茅与虎羊茅或LpTG-2(多年生黑麦草Tg-2)的联会中。有些组合是不稳定的，因为随着植物的发育，产生了无内生体的分蘖。这种不稳定性并不局限于内生菌-草联合，表现出两种类型的组织学不相容反应中的任何一种。内生菌-草联合的亲和性与接种成苗率无关。这项研究进一步证明了内生顶顶菌与其寄主牧草之间的关系是复杂的。
The ability of representative isolates of six recognized taxonomic groups (TGs) of Acremonium endophytes from perennial rye-grass, tall fescue and meadow fescue to form compatible associations following inoculation of seedlings of the three grasses was examined. The six TGs were not specific to their natural hosts and most representative isolates formed associations with all three host species, Incompatibility resulting in hyphal death was noted in A. coenophialum-perennial rye-grass associations. Incompatibility affecting host tissue, resulting in stunted tillers with necrosis in the region of the apical meristem, was present in associations of tall fescue with either A. uncinatum or LpTG-2 (Lolium perenne TG-2). Some associations were unstable with endophyte-free tillers being produced as plants developed. This instability was not confined to endophyte-grass associations showing either of the two types of histological incompatibility reactions. The compatibility of endophyte-grass associations was not related to the percentage of successfully inoculated seedlings obtained. This study provides further evidence that the association between Acremonium endophytes and their host grasses is complex.