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1.
A new leaf blight and mummy fruit disease caused by a species of Monilinia was first found on Rhododendron kaempferi at the lakeside of Shikotsu-ko, Hokkaido, northern Japan, in 2002. Studies on morphology, life cycle, cultural characters, and gene analyses of the causal fungus enabled us to conclude that it is a new species of the genus. It is named M. jezoensis. Rhododendron is a new host genus for Monilinia fungi in Japan. 相似文献
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本文报告了粘菌一新种,小囊散丝菌Dianema microsporangium sp. nov.,讨论了新种与本其它种的区别,模式标本保存在中国科学院微生物研究所真菌标本室.散丝菌属在中国首次报导。 相似文献
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Phylogenetic analysis of noncoding trnL plastid DNA sequences and morphological data for 43 species of Zygophylloideae, representing most of the morphological and geographical variation in the subfamily, indicates that the currently recognised genera Augea (monotypic, southern Africa), Tetraena (monotypic, China), and Fagonia (c. 30 species, widespread), are embedded in Zygophyllum (c. 150 species, widespread). A generic classification based on six monophyletic and morphologically distinctive entities is proposed: Roepera with c. 60 species in Australia and southern Africa, Zygophyllum with c. 50 species in Asia, Tetraena with c. 40 species in Africa and Asia, Augea with a single species in southern Africa, Melocarpum with two species in the Horn of Africa region, and Fagonia with c. 30 species in both the Old and the New World. Scanning electron microscopy studies of testa structure provided important characters for the delimitation of some genera. New combinations (61) are made in Roepera, a resurrected genus originally described from Australia, one new name is proposed in Zygophyllum, 35 new combinations are made in Tetraena, and two new combinations are made in Melocarpum (previously Zygophyllum sect. Melocarpum). 相似文献
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C. M. Rogers 《Plant Systematics and Evolution》1984,147(3-4):327-328
The diploid chromosome number for the EuropeanLinum hologynum and the haploid number for the AustralianL. monogynum is 42 and appears to establish a new and distinctive base number for sect.Linum. The possession by these two species and by the AustralianL. marginale of multiporate pollen and united styles, a unique combination of features in sect.Linum, may warrant the establishment of a new subsection in that section to accommodate the three species. 相似文献
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Polygala pauciramosa, a new species from the Federal District and the state of Goiás is described, illustrated, and compared with related species
of Polygala subgenus Hebeclada. The new species is an herb that grows in seasonally to permanently wet savannas. A key to the species of Polygala subgenus Hebeclada from Goiás state, Brazil is provided. 相似文献
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菌绒孢是一个小属,已描述过的种约50个,都是植物寄生菌,有的引致植物病害还较 严重.本文报告了我国产的21个种,其中1个是新种,4个是新组合和2个新记录,对18个种均有英文描述和附图,新种还附有拉丁文简介,各个种的地区分布也予以载述.但文中有分布地区而其后未附HMAS标本号码者多系据《中国真菌总汇》(1979)转录.从前人的描述和我们研究中看出,菌绒孢属的属级特征有:(1)产孢细胞合生,合轴式多点全壁芽茁产孢;(2)分生孢子梗壁上和分生孢子顶端和基脐,或仅基脐的孢痕疤明显而厚;(3)分生孢子梗主要从表生甸甸菌丝上作为侧枝或顶生,但有的种也兼有从子座上 簇生的;(4)菌丝多结集成菌丝绳或攀缘于叶毛上;(5)分生孢子链生,少数种也不链生. 这就清楚表明菌绒孢属与尾孢菌属和色链隔孢属(Phaeoramularia)少不同之处在于,尾孢 菌和色链隔孢属二者的分生孢子梗均成簇发生且无表生匍匐菌丝,与极其近似的假尾孢属(Pseudocercospora)不同之处在于,后者的分生孢子梗也着生于表生匍匐状菌丝和簇 生于子座上,但其分生孢子梗和分生孢子的孢痕疤却薄而不明显,因而易于区别开.虽然1974年von Arx在其《纯培养产孢真菌的属》一书中,曾把菌绒孢属作为枝孢 属(Cladosporium)的异名,但这一观点我们未予接受,其理由已在《中国色链隔孢曲(1982)一文中加以说明,这里未予重述.上述这21个种除3个种,即M. costaricensis, M, pawlownicola和M. vaginae我们未获得研究材料,仅据以前作者的报导转录外,其余18个种均系根据标本进行的.这些标本,含M. merremiae sp. nov.的模式标本在内,均贮藏于中国科学院微生物研究所真菌标本室. 相似文献
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报道了中国四川报春花属(Primula L.)一新种——小繸瓣报春(P.hydrocotylifolia G.Hao,C.M.Hu&Y.Xu)。小繸瓣报春植株无毛、无粉,叶片多少呈圆形,具纤细的叶柄,开花期叶丛基部无鳞片,球形蒴果藏于宿存花萼,成熟时裂成不规则碎片,显然属于脆蒴报春组(sect.Petiolares Pax)革叶报春亚组(subsect.Chartacea W.W.Sm.&Forrest),并与该亚组的川西繸瓣报春(P.veitchiana Petitm.)最为接近,但后者植物体的各部分均远大于此新种,花序多花,花亦较大,二者之间无过渡类型。 相似文献
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Summary Three closely affiliated species of Heterospathe Scheff. (H. elegans (Becc.) Becc., H. humilis Becc. and H. versteegiana Becc.) from New Guinea are revised. They are reduced to a single species which is divided into two subspecies, and the new
combination H. elegans subsp. humilis (Becc.) M. S. Trudgen & W. J. Baker is made. The subspecies can be readily distinguished by their growth habit. Epitypes
are designated for the three previously published names, as informative material on the habit is not included in the existing
type specimens. A new, potentially related species is described as H. pullenii M. S. Trudgen & W. J. Baker. 相似文献
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Hans R. Preisig 《Plant Systematics and Evolution》1989,164(1-4):209-214
A new species ofMallomonas, M. alphaphora (Chrysophyceae), was found in freshwater ponds in the Perth region, Western Australia. It is distinguished from other species ofMallomonas by its very distinctive scale and bristle morphology and is placed in a new section,Alphaphorae, of the genusMallomonas.
Dedicated to Prof. DrL. Geitler on the occasion of the 90th anniversary of his birthday. 相似文献
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通过查阅相关文献和标本,作者发现近期发表的苦苣苔科吊石苣苔属植物一新种——Lysionotus bijantiae D. Borah & A. Joe实为鉴定错误,应是汉克苣苔属的长圆叶汉克苣苔[Henckelia oblongifolia(Roxb.)D. J. Middleton & Mich. Möller] [原长圆叶唇柱苣苔Chirita oblongifolia(Roxb.)Sinclair]。Lysionotus bijantiae的模式标本采集于中国西藏东南部地区的喜马拉雅南坡,该地区苦苣苔植物多样性较为丰富。作者因其花具2枚发育雄蕊而将其归于吊石苣苔属,花萼分裂不达基部而与吊石苣苔属其他相关种类比较,而忽略了其种子先端不具附属物的特征。通过电镜扫描观察到,该种在墨脱境内居群以及其模式产地居群的种子均无附属物,从而证实了该种不是吊石苣苔属的物种,而是属于汉克苣苔属。因此,作者将Lysionotus bijantiae处理为Henckelia oblongifolia的新异名,同时提供了长圆叶汉克苣苔的彩色图片(含种子扫描图)、选定模式标本,并给出了吊石苣苔属和汉克苣苔属的区分方法和主要识别特征,不仅为这两个属的物种鉴定提供了参考,而且避免更多的物种分类混淆问题出现。 相似文献
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At present, the American genus Thamnocephalus has three species, recorded from several states of U.S.A., México and Venezuela: Thamnocephalus platyurus Packard, T. mexicanus Linder and T. venezuelensis Belk & Pereira. The new species Thamnocephalus salinarum, from a turbid saline temporary pond inside the Salinas Grandes of Córdoba, Argentina is described here. The new species differs from all other congeners by the presence in the male, of an unbranched frontal appendage and a pair of soft cordiform parapenial lobes; also, by the sexually dimorphic caudal fin-like lobe. This new species may represent a new genus, however since only five specimens were collected it was not possible to observe if the penial ornamentation conforms to the Thamnocephalus type. Therefore, a conservative position is taken until new material allows proper analysis, by keeping the new species in the genus Thamnocephalus under the new subgenus Simplicephalus. 相似文献
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Phylogenetic relationships, limits of species, and genera within Lycoperdaceae, were inferred by use of ITS and LSU nu-rDNA sequence data. Lycoperdaceae was confirmed as monophyletic, and Mycenastrum corium as a sister taxon to the ingroup. Four major clades were identified and received weak to moderate support and correspond with the genera Lycoperdon, Bovista, Calvatia, and Disciseda. The Lycoperdon clade includes species from Lycoperdon, Vascellum, Morganella, Handkea, Bovistella, and Calvatia. The structure within the Lycoperdon clade is unresolved and several clades are more or less unsupported, which suggests treating the supported Lycoperdon clade as the genus Lycoperdon. L. nigrescens and L. caudatum occur on single branches and their phylogenetic positions could not be resolved. The phylogenetic analyses identified 31 species of Lycoperdon, 11 species of Bovista, six species of Calvatia, and two species of Disciseda. In Lycoperdon three new species were recognized. A new species closely related to B. limosa is identified and discussed. A classification of Lycoperdaceae is proposed based on the results of the phylogenetic analyses. Morphological characters of species within and among identified clades are discussed. 相似文献
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Michael Nee 《Brittonia》1996,48(4):574-579
Acanthosyris asipapote, a new species from the vicinity of Santa Cruz, Bolivia, is described and illustrated. It is most similar to A. paulo-alvinii Barroso, known only from the state of Bahia, Brazil, but differs by leaf characters, pilose filaments, and smaller seeds.
A key to the five woody genera and nine species of Santalaceae in South America is provided. Cervantesia, Jodina, and Myoschilos are probably monotypic; Santalum (in South America) has a single species, and Acanthosyris has five species. 相似文献
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The authors report first records for the genus Setulipes in Madagascar, with the presence of Setulipes cf. hakgalensis and two new species, Setulipes funaliformis and S. moreaui, as well as a new species from Mauritius: S. mauritiensis. A key to these taxa, as well as to other African species, is supplied. 相似文献
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药用植物内生放线菌具有合成天然活性化合物的潜力,放线菌新种是寻找新型抗生素先导化合物的一个重要来源。【目的】挖掘药用植物地黄内生放线菌资源,并对地黄轮纹病拮抗菌株leaf-16进行新种鉴定。【方法】本研究采用五步消毒法分离河南道地药材地黄的内生放线菌,以地黄轮纹病原真菌草茎点霉(Phoma herbarum)为指示菌,采用平板对峙法筛选对该病菌有抑制作用的菌株,16S rRNA基因测序发现一株抗地黄轮纹病的放线菌新种leaf-16。通过形态、生理生化、细胞壁化学组分和分子生物学等特征对菌株leaf-16进行多相分类学鉴定。【结果】经平板对峙实验得到8株抗地黄轮纹病的放线菌,其中菌株leaf-16经16S rRNA基因测序、形态比较、生理生化、化学组分和分子生物学以及DNA-DNA杂交分析,确定菌株leaf-16为1株链霉菌新种,并命名为Streptomyces folium。【结论】菌株leaf-16为1株链霉菌新种,具有抑制地黄轮纹病原真菌的活性,为进一步分离新型抗地黄轮纹病的生物制剂奠定物质基础。 相似文献
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H. -P. Koops B. Böttcher U. C. Möller A. Pommerening-Röser G. Stehr 《Archives of microbiology》1990,154(3):244-248
A new species of Nitrosococcus is described. It resembles Nitrosococcus oceanus in shape, size, and ultrastructure of the cells. However, the new species has a more pronounced salt requirement, corresponding to its natural habitats. Two strains were isolated from a salt lake in Saudi Arabia and a salt lagoon in the Mediterranean Sea, respectively. In contrast to N. oceanus, both isolates of the new species were unable to utilize urea as ammonia source. Both species also differed in gelelectrophoretic cell protein patterns. The name N. halophilus is proposed. 相似文献
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Taxonomy of the genus Cristulariella is revised, retaining Cristulariella (Crist.) depraedans as the type. Two new species, Crist. cercidiphylli and Crist. corni, are additionally described under the genus. The new anamorphic genus Hinomyces is erected to accommodate Botrytis (Cristulariella) moricola and Cristulariella pruni. A new genus and species, Nervostroma depraedans, is erected in the Sclerotiniaceae to accommodate the teleomorph of Crist. depraedans, with an additional species, Nervostroma cercidiphylli. 相似文献