Blue-stain Fungi Associated with Roots of Southern Pine Trees Attacked by the Southern Pine Beetle, Dendroctonus frontalis.
Blue-stain Fungi Associated with Roots of Southern Pine Trees Attacked by the Southern Pine Beetle, Dendroctonus frontalis.
复制标题
与受到南方松甲虫 Dendroctonus frontalis 攻击的南方松树根相关的蓝染真菌。
DOI：
10.1094/pdis.1997.81.8.942
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发表时间：
1997
期刊：
影响因子：
4.5
通讯作者：
J. P. Jones
中科院分区：
文献类型：
--
作者：
W. Otrosina;N. J. Hess;S. Zarnoch;T. Perry;J. P. Jones
在美国得克萨斯州东部至阿拉巴马州建立了40个成对样地，研究了南松甲虫（SPB）侵染南松林分根部的蓝斑真菌。在最近或目前受到森林砍伐的样地取样了木本根。比较了不同天然林分和人工林中细木林（Leptographium spp.）及其相关真菌的发生情况和各项特征。从根中分离到3种真菌，分别为L. terebrantis、L. procerum和Ophiostoma ips，以及未确定的Leptographium和grapum。从spb侵染区分离到的L. terebrantis的频率高于L. procerum和O. ips （P < 0.001）。spb侵染区分离到的蓝染真菌种类及相关属多于对照区（P < 0.001）。这也适用于L. terebrantis， L. procerum和O. ips的联合分离百分比（P = 0.03）。蓝染真菌的存在也与对照区林分基底面积的增加有关（P = 0.045）。两种真菌的分离频率与对照样地林分基面积的增加呈显著的逻辑相关（P分别为0.02、0.02和0.01）。三种蓝斑蝶的发生频率与spb攻击样地的基底面积没有明显的逻辑关系。这些结果表明，蓝斑真菌在南方松树对SPB的易感性动态中起重要作用。
Forty paired plots were established from eastern Texas to Alabama to study root-infecting, blue-stain fungi in southern pine stands undergoing southern pine beetle (SPB) attack. Woody roots were sampled in plots undergoing recent or current attack by the SPB. Comparisons were made between occurrence of Leptographium spp. and related fungi and data on various characteristics of natural stands and plantations studied. Three fungal species, L. terebrantis, L. procerum, and Ophiostoma ips, along with unidentified Leptographium and Graphium species, were isolated from sampled roots. L. terebrantis was isolated more frequently from SPB-attacked plots (P < 0.001) than was either L. procerum or O. ips. More blue-stain fungal species and related genera were isolated from SPB-attacked plots than from control plots (P < 0.001). This also was true for combined isolation percentages of L. terebrantis, L. procerum, and O. ips (P = 0.03). Presence of blue-stain fungi also was associated with higher stand basal area in the control plots (P = 0.045). Isolation frequencies of O. ips and L. procerum, along with the combination of these fungal species with L. terebrantis, were logistically related to increasing stand basal area in the control plots (P = 0.02, 0.02, and 0.01, respectively). No logistic relationship was found for frequency of any of the three blue-stain species with respect to basal area in SPB-attacked plots. These results suggest blue stain fungi are important in the dynamics of susceptibility of southern pines to SPB attack.