ABSTRACT Injury from sampling increment cores may induce defense responses in trees, which may vary between species and reflect differing defense allocation strategies against attack by insects and pathogens. We recorded presence of systemic induction of traumatic resin ducts from early-season increment coring in mature white spruce (Picea glauca) and lodgepole pine (Pinus contorta var. latifolia) trees. In the year of coring, traumatic resin ducts formed three months later, 20 cm below the initial coring site in the xylem of white spruce and showed little variation in response among the spruce families. In contrast, lodgepole pine did not form traumatic resin ducts in trees cored earlier in the growing season. Although traumatic resin ducts are induced by biotic and abiotic disturbances, we found a species-specific defense response to increment coring in two common boreal forest tree species.

中文翻译：

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白云杉中的增量取芯引起的创伤性树脂管道，但在 LODGEPOLE 松木中没有

摘要采样增量核心造成的伤害可能会引起树木的防御反应，这可能因物种而异，反映了针对昆虫和病原体攻击的不同防御分配策略。我们记录了在成熟的白云杉 (Picea glauca) 和黑松 (Pinus contorta var. latifolia) 树木中早期增加取芯的创伤性树脂导管的系统诱导的存在。在取芯年，3 个月后，在白云杉木质部初始取芯点下方 20 厘米处形成了创伤性树脂导管，并且在云杉科之间的反应几乎没有变化。相比之下，黑松没有在生长季节较早去核的树木中形成创伤性树脂管。虽然创伤性树脂导管是由生物和非生物干扰引起的，