Lactarius guangdongensis sp. nov. (Russulaceae, Russulales), a species of Lactarius sect. Deliciosi growing with a vulnerable five-needle pine, Pinus kwangtungensis
Lactarius guangdongensis sp. nov. (Russulaceae, Russulales), a species of Lactarius sect. Deliciosi growing with a vulnerable five-needle pine, Pinus kwangtungensis
复制标题
广东乳杆菌
DOI：
10.11646/phytotaxa.393.3.4
复制
发表时间：
2019-02
期刊：
影响因子：
1.1
通讯作者：
Wang XH
中科院分区：
文献类型：
--
作者：
Han Y;Liang CZ;Liu PG;Nuytinck J;Wang XH
Deliciosi乳菇组是一组外生菌根真菌，对松科树木和罕见的壳斗目树木表现出高度的寄主特异性。本文报道了该组的一个新种，L. guangdongensis，分布于华南。该新种的担子果最小（盖1-3厘米）。担子果纯橙子，颜色微绿，与冷杉属的担子果相似。冷杉属（Abieticola）和L. laeticolor和Pinus associated L. vividus近远缘的lameparum和没有pleuromacrocystidia可以作为有效的字符，本种。它与中国国家保护植物广东松（Pinus kwangtungensis）一起生长，可能是与五针松共生的少数物种之一。ITS区和甘油醛-3-磷酸脱氢酶基因（gpd）的系统发育分析表明，L。guangdongensis与其近缘种和相似种明显不同，可能代表了该组早期的分支谱系。本研究所提供的分子生物学和形态学特征将为广东松的原位和迁地保护提供参考。
Lactarius sect. Deliciosi is a group of ectomycorrhizal mushrooms showing high host specificity with trees of Pinaceae and more rarely Fagales. A new species of this section, L. guangdongensis, is described from South China. This new species has the smallest basidiocarps (pileus 1–3 cm) in the section. The pure orange basidiocarps with faint greenish discoloration are similar to those of Abies-associated L. abieticola and L. laeticolor and Pinus-associated L. vividus. The subdistant lamellae and absence of pleuromacrocystidia can be used as valid characters for this species. It grows with Chinese national protected plant Pinus kwangtungensis and might be one of the very few species that form symbiosis with five-needle pines. Phylogenetic analyses of the ITS region and glyceraldehyde-3-phosphate dehydrogenase gene (gpd) show that L. guangdongensis clearly diversified from its relatives and look-alikes and probably represents an early diverging lineage in the section. Molecular and morphological characters provided in this study will be useful for in situ and ex situ conservation of P. kwangtungensis in the future.