松树蜂入侵樟子松的内栖真菌区系

The mycobiota of Pinus sylvestris var. mongolica trunk invaded by Sirex noctilio

为探索松树蜂入侵后的樟子松内栖真菌与健康状态樟子松内栖真菌的组成差异,本文对松树蜂入侵后不同健康状态(健康、衰弱、死亡)樟子松的不同主干高度(基、中、上)内栖真菌进行研究。共分离到樟子松内栖真菌25属37种,其中健康木分离到13种,多为腐生菌和内生菌;衰弱木分离到23种,多为致病菌和腐生菌;死亡木分离到11种,多为腐生菌。不同主干高度而言,健康木中部真菌检出率最大,为55.2%,基部真菌种类最多,为9种;衰弱木上部真菌检出率最大,为100.8%,基部真菌种类最多,为13种;死亡木上部真菌检出率最大,为106.4%,上部真菌种类最多,为8种。不同健康状态内栖真菌的数量为:死亡木>衰弱木>健康木;内栖真菌种类为:衰弱木>健康木>死亡木。结果为研究樟子松不同健康状态下的优势内栖真菌与松树蜂及共生菌的关系奠定了基础。

The specific composition of inner habiting fungi of the trunk of Pinus sylvestris var. mongolica changed after being invaded by Sirex noctilio. The different species and quantities of the fungi at different health levels（healthy, weak and dead）, and different heights（top, central and base） of the trunk were investigated. In total, 37 species of inner habiting fungi belonging to 25 genera were isolated. Thirteen species were isolated from the healthy trunk, and most of them were saprophytic and endophytic. Twenty-three species were isolated from the weak trunk, and most of them were pathogenic and saprophytic. Eleven species were isolated from the dead trunk and most of them were saprophytic. The highest isolation frequency（55.2%） for healthy trunk occurred in central part, and the maximum species number（nine species） occurred in the base part. The highest isolation frequency（100.8%） for weak trunk occurred in the top part, and the maximum species number（13 species） occurred in the base part. The highest isolation frequency（106.4%） for dead trunk occurred in the top part, and the maximum species number（eight species）occurred in the top part.The quantities of the fungi decreased progressively in order of deadweakenedhealthy trunk;the species number decreased progressively in order of weakenedhealthydead trunk.