Chara lipkinii (Charales, Charophyceae):地中海野生濒临灭绝的雌雄异株新种及其对Chara属分类的启示

IF 1.5 3区 生物学 Q3 PLANT SCIENCES Fottea Pub Date : 2022-04-01 DOI:10.5507/fot.2021.012
R. Romanov, S. Barinova, V. Nikulin, A. Gontcharov
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引用次数: 3

摘要

:根据来自以色列地中海的标本描述了一个新物种,Chara lipkinii。二节,10–13个轮生的小枝,完全的Tylacnthous-异tichous disostichous轴皮层,具有非常短的孤立棘细胞,几乎不可见的双柄双足柄短钝托叶,经常表现为单倍体,与没有皮层首字母和1-3的完全生态的小枝结合,主要是两个具有单侧苞片细胞的节,将其与迄今为止描述的Chara物种区分开来。其形态特征在Wood描述的亚属分类学中最为重要,表明其位于Chara亚类中,而不是与Chara和Grovesia的远缘聚类。利普基尼的卵孢子表面没有显示出仅基于卵孢子形态进行鉴定的特征,但可能有助于将其与某些物种区分开来。根据我们的分析,基于rbcL和ITS1的物种遗传亲和力大多不支持基于形态特征的Chara属的亚属划分。是一种淡水和半咸水物种,生长在东地中海的小型浅水内陆水体和溪流中,即该地区最受威胁的水体之一。该物种在野外面临着极高的灭绝风险。它已经从以前发现的所有地方消失了,这些地方不再支持轮藻种群。在最近发现的一个利普基尼C.lipkinii地区,由于大量沉积物堆积和富营养化,活植物逐渐减少和消失。需要采取紧急行动恢复栖息地。30000,评估两个链的rbc和ITS1收敛性,根据确定平稳性(前25%的样本被丢弃为“烧录”),并根据在平稳阶段采样的树计算后验概率。通过ML中的bootstrap百分比(BP;S tamatakis等人2008)和BI中的后验概率(PP)来估计树的稳健性。未考虑BP<50%和PP<0.95。使用web服务RAxML版本7.7.1推断出基于ML的引导分析(http://embnet.vitalit.ch/raxml–bb/;科兹洛夫
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Chara lipkinii (Charales, Charophyceae): a new dioecious Mediterranean species under risk of extinction in the wild and some implications for the taxonomy of the genus Chara
: A new species, Chara lipkinii , was described based on specimens from the Mediterranean, Israel. Dioecy, 10–13 branchlets in a whorl, complete tylacanthous to isostichous displostichous axial cortex with very short solitary spine cells, hardly visible diplostephanous bistipulate short obtuse stipulodes, frequently appearing as haplostephanous, in combination with completely ecorticate branchlets without cortex initials and with 1–3, mainly two nodes with unilateral bract cells distinguish it from species of Chara described to date. Its morphological traits, which are most important in the infrageneric taxonomy described by Wood, point towards its placement in the subsection Chara , rather than its distant clustering with both Chara and Grovesia . The oospore surface of C. lipkinii showed no features allowing identification based on oospore morphology only, but could be useful to distinguish it from some species. According to our analyses, the genetic affinity of species based on rbcL and ITS1 mostly does not support infrageneric division of the genus Chara based on morphological traits. is a freshwater and brackish water species, growing in small shallow inland water bodies and streams in the Eastern Mediterranean, i.e., in one of the most threatened water bodies of the region. The species faces a very high risk of extinction in the wild. It has disappeared from all previously discovered localities, which no longer support charophyte populations. The gradual decline and disappearance of living plants from one recently discovered locality of C. lipkinii were observed as a result of heavy sediment accumulation and eutrophication. Urgent action to restore the habitat needs to be taken. of 30000 and the rbc and ITS1 Convergence of the two chains was assessed, stationarity determined according to the (the first 25% of samples were discarded as “burn–in”), and the posterior probabilities were calculated from the trees sampled during the stationary phase. The robustness of the trees was estimated by bootstrap percentages (BP; S tamatakis et al. 2008) in ML and posterior probabilities (PP) in BI. BP < 50% and PP < 0.95 were not considered. ML–based bootstrap analysis was inferred using the web service RAxML version 7.7.1 (http://embnet.vitalit.ch/ raxml–bb/; Kozlov
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来源期刊
Fottea
Fottea 生物-植物科学
CiteScore
4.00
自引率
9.10%
发文量
20
审稿时长
>12 weeks
期刊介绍: Fottea is a journal of Czech Phycological Society (formerly bulletin Czech Phycology). Fottea publishes papers on all aspects of the ecology, physiology, biochemistry, cell biology, molecular biology, systematics and uses of algae (including cyanobacteria)
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