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火炬松和短叶松对南方松甲虫(Dendroctonus frontalis Zimmermann)及其真菌伴生种(Ceratocystis minor(Hedgecock)Hunt)的防御机制。

Defensive mechanisms of loblolly and shortleaf pine against attack by southern pine beetle,Dendroctonus frontalis Zimmermann, and its fungal associate,Ceratocystis minor (Hedgecock) Hunt.

机构信息

Department of Entomology, North Carolina State University, Box 7626, 27695-7626, Raleigh, North Carolina.

出版信息

J Chem Ecol. 1986 Jun;12(6):1397-406. doi: 10.1007/BF01012359.

Abstract

Loblolly and shortleaf pine growing on a single site in the North Carolina piedmont were examined to determine similarities and differences in their defensive mechanisms against the southern pine beetle,Dendroctonus frontalis Zimmermann, and its fungal associate,Ceratocystis minor (Hedgecock) Hunt. Both species responded to wounding and fungal inoculation by forming a hypersensitive lesion around the wound site. There were significantly less soluble sugars and more monoterpenes in the lesion tissue than in unwounded inner bark. The two species were similar in resin flow rate and inner bark soluble sugar content, but the loblolly pines had thicker bark, longer hypersensitive lesions, and a higher concentration of inner bark monoterpenes. Inner bark monoterpene composition was also significantly different between the two pine species. It is hypothesized that two different defensive strategies against southern pine beetle attack may be utilized.

摘要

对北卡罗来纳 Piedmont 单一地点生长的火炬松和短叶松进行了研究,以确定它们在防御南部松甲虫(Dendroctonus frontalis Zimmermann)及其真菌伴生菌(Ceratocystis minor(Hedgecock)Hunt)方面的异同。这两个物种在受到创伤和真菌接种后,都会在创伤部位周围形成一个过敏反应病变。病变组织中的可溶性糖明显少于未受伤的内树皮,而单萜则多于未受伤的内树皮。这两个物种的树脂流速和内树皮可溶性糖含量相似,但火炬松的树皮较厚,过敏反应病变较长,内树皮单萜浓度较高。两种松树的内树皮单萜组成也有显著差异。据推测,可能会利用两种不同的防御策略来对抗南部松甲虫的攻击。

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