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异序报春苣苔——中国广东苦苣苔科报春苣苔属植物新种
发布日期:2019-01-28    来源:国家标本平台      点击次数:275

文章来源:https://www.douban.com/note/702822182/

摘要:本文报道了发现于广东的一种报春苣苔属植物新种——异序报春苣苔 Primulina anisocymosa F. Wen, Xin Hong & Z.J. Qiu,该新种具有这个属内独一无二的花序和果序类型。异序报春苣苔在形态学上与最近发表的博白报春苣苔P. bobaiensis Q.K. Li, B. Pan & Q. Zhang 最为相似。它独特的锯齿状单歧聚伞花序和果序使其再形态上有别于报春苣苔属内所有其他的种。本文不仅对其形态解剖特征进行了分析,还对其染色体和DNA序列数据进行了检测和分析,以确定它的系统发育关系及位置。对来自不同种群的两个异序报春苣苔进行了鉴定,发现这两个群体均被嵌套在报春苣苔属内一个单系分支中,且具有高支持率。本文还报道了该新种的体细胞染色体数目(2n= 36),提供了进一步支持其在报春苣苔属中的证据。

ABSTRACT:A new Primulinaspecies from Guangdong, China with anunusual inflorescence is described here. Primulina anisocymosa is vegetatively most similar to P. bobaiensis. It can be distinguished fromall species within Primulina morphologically by its unique zigzagmonochasial cyme and infructescence. To confirm the phylogenetic relationshipsand generic placement of this species, not only morphological anatomicalfeatures but also chromosome and DNA sequence data were examined and analysedhere. Two samples from different populations identified as Primulinaanisocymosa are monophyletic and were nested in a monophyletic clade withinPrimulina with high branch support. The somatic chromosome number of thenew species is also reported (2n D 36), supporting its placement in thegenus.

原文链接:(Original article link):https://peerj.com/articles/6157 (可直接下载原文PDF)

p57176034.jpg

图1 自然栖息地中两个种群异序报春苣苔的照片.

Primulina anisocymosa (F Wen, Xin Hong and ZJ Qiu) (A, B) 生境 (A, 广州; B, 阳春) (C, D) 植株 (C, 阳春; D, 广州) (E) 小苞片,示不对称,在花梗基部一边对齐. (F) 聚伞花序,退化为点附着,在基部形成肿胀的结节. (G) 锯齿状果序. 温放摄影.

2.jpg

图2 异序报春苣苔和博白报春苣苔的对比.

(A) 花期异序报春苣苔的植株. (B) A. 花期博白报春苣苔的植株. (C) 叶表面 (左:博白报春苣苔, 右: 异序报春苣苔). (D) 也背面(左:博白报春苣苔, 右: 异序报春苣苔). (E) 花序 (上:异序报春苣苔, 下: 博白报春苣苔). (F) 苞片(左: 异序报春苣苔,右: 博白报春苣苔).(G) 异序报春苣苔花冠正面观. (H) 博白报春苣苔花冠正面观. (I) 花冠俯视图 (左:异序报春苣苔, 右: 博白报春苣苔).(J) 异序报春苣苔花冠侧面观.(K) 博白报春苣苔花冠侧面观. (L) 异序报春苣苔花冠剖开. (M) 博白报春苣苔花冠剖开. (N) 无花冠雌蕊(左: 异序报春苣苔,右: 博白报春苣苔).洪欣和温放摄影.

原文地址:http://www.nsii.org.cn/2017/wikilet.php?w=NewSpecies2019_004
[ 编辑/韩国霞 ]
2019/1/28 15:45:32
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