Termite Presence and Feeding on Loblolly Pine Wood Differs Among Four Root-Infecting Bluestain (ophiostomatoid) Fungal Species

Termite Presence and Feeding on Loblolly Pine Wood Differs Among Four Root-Infecting Bluestain (ophiostomatoid) Fungal Species
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火炬松木材上白蚁的存在和取食在四种感染根部的蓝斑(蛇口类)真菌物种中存在差异

DOI:
10.1093/ee/nvab052
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发表时间:
2021
影响因子:
1.7
通讯作者:
Riggins, John J
Riggins, John J
中科院分区:
农林科学3区
文献类型:
--
作者:
Clay, Natalie A;Siegert, Courtney;Tang, Juliet D;Little, Nathan S;Eckhardt, Lori G;Riggins, John J

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树皮甲虫和根象甲可以通过景观尺度上的树木死亡影响森林。最近,地下白蚁已被链接到这些甲虫通过存在的蓝变真菌(子囊菌门:Ophiostomataceae),这是由甲虫到树木的载体。然而,只有一小部分的蓝斑物种已被检查。在这里,我们测试了是否白蚁,bluestain协会在外地模式反映白蚁在实验室选择试验的喂养偏好。我们记录了四种蓝变真菌(Leptographium procerum(W.B. Kendr.),L. terebrantis(巴拉斯&佩里)、Grosmannia huntii(Rob.- Jeffr.),和G. alacris(T.A. Duong,Z.W. de Beer & M.J. Wingf.)在美国东南部的2,350棵火炬松的根部,以及这些根部是否存在白蚁,并将其与实验室选择的喂养试验配对。白蚁被发现2.5倍,树根与至少一个蓝变真菌存在比树根没有蓝变真菌。虽然本研究中的白蚁和其他白蚁与L. procerum,L. terebrantis和少量G. huntii,白蚁只对接种G.亨廷顿氏病实验室试验。这表明,增加白蚁存在的木材与蓝变真菌可能是由其他因素,而不是增加木材适口性。因此,白蚁可能不成比例地影响特定池的木材周转率(例如,树皮甲虫和根象鼻虫攻击树木)并且在某些情况下(例如,G. Huntii)加速木材分解。这项研究支持了越来越多的证据表明,地下白蚁和蓝变真菌之间的关联是空间和分类广泛。
Bark beetles and root weevils can impact forests through tree death on landscape scales. Recently, subterranean termites have been linked to these beetles via the presence of bluestain fungi (Ascomycota: Ophiostomataceae), which are vectored to trees by beetles. However, only a small subset of bluestain species have been examined. Here, we tested whether termite-bluestain association patterns in the field reflect termite feeding preference in laboratory choice trials. We documented the presence of four bluestain fungi (Leptographium procerum(W.B. Kendr.),L. terebrantis(Barras & Perry),Grosmannia huntii(Rob.-Jeffr.), andG. alacris(T.A. Duong, Z.W. de Beer & M.J. Wingf.) in the roots of 2,350 loblolly pine trees in the southeastern United States and whether termites were present or absent on these roots and paired this with laboratory choice feeding trials. Termites were found 2.5-fold on tree roots with at least one bluestain fungus present than tree roots without bluestain fungi. Although termites in this study and others were associated withL. procerum,L. terebrantis, and marginallyG. huntii, termites only showed preferential feeding on wood inoculated withG. huntiiin laboratory trials. This suggests that increased termite presence on wood with bluestain fungi may be driven by factors other than increased wood palatability. Termites could thus disproportionately affect wood turnover rates for specific pools (e.g., bark beetle and root weevil attacked trees) and in some cases (e.g.,G. huntii) accelerate wood decomposition. This study supports the growing evidence that the association between subterranean termites and bluestain fungi is spatially and taxonomically widespread.
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DOI: --
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