Towards a monophyletic classification of Lejeuneaceae III: the systematic position of Leiolejeunea
Towards a monophyletic classification of Lejeuneaceae III: the systematic position of Leiolejeunea
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DOI：
10.11646/phytotaxa.170.3.4
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发表时间：
2014-05-26
期刊：
影响因子：
1.1
通讯作者：
Heinrichs, Jochen
中科院分区：
文献类型：
--
作者：
Schaefer-Verwimp, Alfons;Feldberg, Kathrin;Heinrichs, Jochen
在牙买加的模式产地发现了100多年的衍生苔类植物Leiolejeunea grandiflora。根据新采集的样品，首次描述了其油体特征。每个叶细胞有2-4（-6）个相当小的，近均质到非常细的裂片，近球形到椭圆形，无色油体。这些植株为雌雄异株或自株。两个叶绿体区域（trnL-trnF，rbcL）和核核糖体ITS区的DNA序列获得的两个加入Leiolejeunea，使这些植物的系统发育关系的推断。基于对87个Lejeuneaceae代表物种的贝叶斯遗传推断以及最大简约和最大似然分析，Leiolejeunea被认为是Echinolejeuneinae或Cheilolejeuneinae的姐妹种。因此，我们提出了新的单属亚族Leiolejeuneinae的关系Cheilolejeuneinae和Echinolejeuneinae。分析还包括一个新加入的属模式的Cheilolejeunea，C。[医]密生唇鳞藓。该物种与Cystolejeunea有很好的姐妹关系。为了避免命名上的混乱，我们提出了一个广泛的属的概念，包括Aureolejeunea，Cyrtolejeunea，Cystolejeunea，Evansiolejeunea，Leucolejeunea和Omnalanthus。
The derived liverwort Leiolejeunea grandiflora was recollected at the type locality in Jamaica after more than 100 years. The characteristics of its oil bodies were described for the first time based on the new collections. Each leaf cell possesses 2-4(-6) rather small, subhomogeneous to very finely segmented, subglobose to ellipsoidal, colorless oil bodies. The plants were either dioicous or autoicous. DNA sequences of two chloroplast regions (trnL-trnF, rbcL) and the nuclear ribosomal ITS region were obtained for two accessions of Leiolejeunea to enable the inference of the phylogenetic relationships of these plants. Based on Bayesian inference of phylogeny as well as maximum parsimony and maximum likelihood analyses of a dataset including 87 representatives of Lejeuneaceae, Leiolejeunea was found as the putative sister to either Echinolejeuneinae or Cheilolejeuneinae. Thus, we propose the new monogeneric subtribe Leiolejeuneinae with relationships to Cheilolejeuneinae and Echinolejeuneinae. The analyses included also one accession of the generitype of Cheilolejeunea, C. decidua [= Cheilolejeunea adnata]. This species was found in a well supported sister relationship with Cystolejeunea. To avoid nomenclatural confusion, we propose a wide genus concept for Cheilolejeunea including Aureolejeunea, Cyrtolejeunea, Cystolejeunea, Evansiolejeunea, Leucolejeunea, and Omphalanthus.