Elatostema qinzhouense (Urticaceae), a new species from limestone karst in Guangxi, China.
Elatostema qinzhouense (Urticaceae), a new species from limestone karst in Guangxi, China.
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广西喀斯特石灰岩溶地新种Elatostema qinzhouense（荨麻科）
作者：
Fu L;Monro AK;Yang T;Wen F;Pan B;Xin Z;Zhang Z;Wei Y
钦州楼梯草Fu，A.K. Monro & Y.G.本文描述了采自广西的一新种-。形态学上，E. qinzhouense与E.贺州花与贺州花的区别在于叶片较小，雄蕊花梗苞片较少且较小，雌蕊花梗苞片较长，瘦果较大。这一结果得到了分子证据的支持。利用ITS、trnH-psbA和psbM-trnD三个DNA区域对楼梯草属107个分类群的系统发育位置进行了研究。（包括E. qinzhouense）。贝叶斯推理（BI）和最大似然（ML）分析都恢复了相同的强支持树拓扑结构，表明E。qinzhouense是楼梯草属（Elatostema）核心分支的一员，是楼梯草属（Elatostema）的姐妹属。贺州植物。沿着系统发育学研究，对新种的质体基因组和rDNA序列进行了组装和注释。质体基因组长度为150，398 bp，包含两个24，688 bp的反向重复序列（IR），由83，919 bp的大单拷贝和17，103 bp的小单拷贝分隔。共回收113个功能基因，包括79个蛋白质编码基因，30个tRNA基因和4个rRNA基因。rDNA全长5，804 bp，包括18 S核糖体RNA部分序列（1，809 bp）、内转录间隔区1（213 bp）、5.8S核糖体RNA（164 bp）、内转录间隔区2（248 bp）和26 S核糖体RNA部分序列（3，370 bp）。此外，E. qinzhouense为2n = 26，为二倍体。鉴于楼梯草属植物的倍性水平与生殖系统之间的一致关系，该新种也被认为是有性生殖的。我们对E.根据国际自然保护联盟的标准，秦州松属濒危物种。
Elatostema qinzhouense L.F. Fu, A.K. Monro & Y.G. Wei, a new species from Guangxi, China is described and illustrated. Morphologically, E. qinzhouense is most similar to E. hezhouense from which it differs by having smaller size of leaf laminae, fewer and smaller staminate peduncle bracts, longer pistillate peduncle bracts and a larger achene. This result is supported by the molecular evidence. The phylogenetic position of the new species within Elatostema is evaluated using three DNA regions, ITS, trnH-psbA and psbM-trnD, for 107 taxa of Elatostema s.l. (including E. qinzhouense). Bayesian inference (BI) and maximum likelihood (ML) analyses each recovered the same strongly supported tree topologies, indicating that E. qinzhouense is a member of the core Elatostema clade and sister to E. hezhouense. Along with the phylogenetic studies, plastid genome and ribosomal DNA (rDNA) sequences of the new species are assembled and annotated. The plastid genome is 150,398 bp in length and comprises two inverted repeats (IRs) of 24,688 bp separated by a large single-copy of 83,919 bp and a small single-copy of 17,103 bp. A total of 113 functional genes are recovered, comprising 79 protein-coding genes, 30 tRNA genes, and four rRNA genes. The rDNA is 5,804 bp in length and comprised the 18S ribosomal RNA partial sequence (1,809 bp), internal transcribed spacer 1 (213 bp), 5.8S ribosomal RNA (164 bp), internal transcribed spacer 2 (248 bp) and 26S ribosomal RNA partial sequence (3,370 bp). In addition, the chromosome number of E. qinzhouense is observed to be 2n = 26, suggesting that the species is diploid. Given a consistent relationship between ploidy level and reproductive system in Elatostema, the new species is also considered to be sexually reproducing. Our assessment of the extinction threat for E. qinzhouense is that it is Endangered (EN) according to the criteria of the International Union for Conservation of Nature.
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影响因子：
14.9
作者：
Shi, Linchun;Chen, Haimei;Liu, Chang
通讯作者：
Liu, Chang
Elatostema arcuatobracteatum（荨麻科），越南新种
影响因子：
1.1
作者：
Fu, Long-Fei;Van Truong Do;He, Cheng-Xin
通讯作者：
He, Cheng-Xin
影响因子：
2.4
作者：
Gryta, Herve;Van de Paer, Celine;Besnard, Guillaume
通讯作者：
Besnard, Guillaume
影响因子：
1
作者：
SUBRAMANIAN, D;THILAGAVATHY, A
通讯作者：
THILAGAVATHY, A
影响因子：
3.4
作者：
CHASE, MW;HILLS, HH
通讯作者：
HILLS, HH