陕西子午岭地区北桑寄生寄主选择和寄生特性研究

Study on Host Selection and Parasitic Characteristics of Loranthus tanakae in Ziwuling,Shaanxi

本研究调查陕西子午岭林区内北桑寄生和其寄主种群的数量及个体特征,并进行相关分析。研究结果表明,北桑寄生只寄生在辽东栎（Quercus wutaishanica Mayr.）、白桦（Carpinus turczaninowii Hance.）和鹅耳枥（Betula platyphylla Suk.）个体上,在局部范围对寄主选择表现出相对专性寄生,同时偏好寄生高大的寄主个体。在调查的寄主辽东栎上具有显著的重复寄生的现象,单棵个体感染达到49棵。北桑寄生对辽东栎枝条具有较强适应性。研究结果为更进一步研究北桑寄生提供参考依据。

This study investigated Loranthus Tanakae and its host populations in Ziwuling forest region in Shaanxi province.The results showed that L.tanakae only parasitized on Quercus wutaishanica Mayr.,Carpinus turczaninowii Hance.,and Betula platyphylla Suk.L.tanakae appeared as obligatory parasitism in the local scope and preferred to parasitizing on tall host individuals at the same time.The infected individuals in host Q.wutaishanica reached to 49 trees.L.tanakae had strong adaptability to branches of Q.wutaishanica.According to these results,the research might provide a reference for the further study of L.tanakae.