Background Syzygium samarangense (Wax apple) is an important tropical fruit tree with high economic and nutrient value and is widely planted in the tropics or subtropics of Asia. Post-harvest water-soaked brown lesions were observed on mature fruits of ornamental wax apples in Chiang Rai Province, Thailand. A fungus with morphological characters, similar to Lasiodiplodia, was consistently isolated from symptomatic fruits. Phylogenetic analyses, based on ITS, LSU, TEF1-a and tub2, revealed that our isolates were closely related to, but phylogenetically distinct from, Lasiodiplodia rubropurpurea. New information Morphological comparisons indicated that pycnidia and conidiogenous cells of our strains were significantly larger than L. rubropurpurea. Comparisons of base-pair differences in the four loci confirmed that the species from wax apple was distinct from L. rubropurpurea and a new species, L. syzygii sp. nov., is introduced to accommodate it. Pathogenicity tests confirmed the newly-introduced species as the pathogen of this post-harvest water-soaked brown lesion disease on wax apples.

中文翻译：

---

Lasiodilodia syzygii sp. 十一月 （Botryosphaeriaceae）在泰国清莱的 Syzygium samarangense 造成收获后水浸褐色病变

背景 Syzygium samarangense（蜡苹果）是一种重要的热带果树，具有很高的经济和营养价值，在亚洲热带或亚热带地区广泛种植。在泰国清莱省的观赏蜡苹果的成熟果实上观察到收获后的水浸褐色病斑。一种具有形态特征的真菌，类似于 Lasiodiploma，始终从有症状的果实中分离出来。基于 ITS、LSU、TEF1-a 和 tub2 的系统发育分析表明，我们的分离株与 Lasiodiplodia rubropurpurea 密切相关，但在系统发育上不同。新信息 形态学比较表明，我们菌株的分生孢子和分生孢子细胞明显大于 L. rubropurpurea。四个基因座碱基对差异的比较证实，来自蜡苹果的物种与 L. rubropurpurea 和一个新物种 L. syzygii sp. 不同。nov., 被引入以适应它。致病性测试证实，新引入的物种是这种收获后蜡苹果水浸褐斑病的病原体。