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<正>2013年5月12日及13日,在青海省循化县孟达国家级自然保护区内的彩虹瀑布路口(35°48'18″N,102°41'05″E,海拔2449 m)以及距离天池约200 m山路边的树林中(35°47'47″N,102°40'48″E,海拔2469 m)共观察到6只雀形目鸟类,并拍摄到清晰数码照片(图1、图2),经鉴定为黄腹山雀Parus venustulus Swinhoe。发现时,1只在彩虹瀑布路口下方路边临时积水中洗澡,另5只在树林间嬉戏追逐。经检索《中国鸟类分类与分布名录》(郑光美,2011)、《青海经济动物志》(李德浩,1989)以及以往青海鸟类有关文献资料、观鸟记录,黄腹山雀在青海的分布未被正式报道过,确认该鸟种为青海省鸟类分布新纪录。观察到的黄腹山雀体形稍较其它山雀小。头、喉和上胸黑色;颊白色;腹部黄色,中央无黑色纵带,雄性成鸟额头顶以至上 相似文献
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2011年5月中旬,笔者在河南董寨国家级自然保护区工作期间,于茶树Camellia sinensis灌丛中(31°57'57″N,114°15'″E,海拔222m)网捕到淡脚柳莺Phylloscopus tenellipes两只。经查阅《中国鸟类分类与分布名录》(郑光美,2005)和中国观鸟记录中心(http://birdtalker.net/index.asp,2011-7-5)等资料,确认为河南省鸟类新纪录。 相似文献
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<正>2012年9月8日,作者在云南省红河州开远市三角海水库(23°35'27.61"N,103°18'16.09"E,海拔1300m)进行鸟类调查时,于湖边一个近乎干涸的鱼塘发现一只蒙古沙鸻Charadrius mongolus,并拍摄到照片。该鸟在鱼塘滩涂中觅食,旁边还有5只青脚滨鹬Calidris temminckii活动。经查阅《中国鸟类分类与分布名录》(郑光美等,2011)、《中国动物志鸟纲第五卷鹤形目鸻形目鸥形目》(王岐山等,2006)、《中国鸟类野外手册》(马敬能等,2000)、《云南鸟类志(上卷)》(杨岚等, 相似文献
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<正>笔者于2012年5月5日11∶48,在黑龙江省大庆市龙凤湿地自然保护区(51°23'28.2″N,122°03'32.9″E)拍摄到1只长嘴半蹼鹬Limnodromus scolopaceus,经查阅《黑龙江省鸟类志》《东北鸟类》《东北鸟类图鉴》《中国鸟类区系纲要》《吉林省野生动物图鉴(鸟类)》《辽宁省动物志(鸟类)》《中国鸟类分布与分布名录(第2版)》等文献资料后认定,长嘴半蹼鹬为东北地区的鸟类新纪录。拍摄时该鸟正在觅食。该鸟体长约30 cm。嘴长而直,约9 cm,黑色,嘴基部较前端颜色略淡一些。具白色眼圈、黑棕色贯眼纹。背部呈黑、褐色 相似文献
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2020年10月25日,在浙江省玉环市玉环漩门湾湿地三期围垦区内发现1只活动于沼泽的褐色滨鹬,地理坐标121°16′52.35″E,28°9′14.17″N。经核对《中国鸟类野外手册》(约翰·马敬能等,2000)和《中国海洋与湿地鸟类》(马志军等,2018),确认是斑胸滨鹬Calidris melanotos(图1)。该鸟胸部具清晰纵纹,胸部的黑色细纵纹与腹部分界清晰;胁部无矛状斑,可区分于尖尾滨鹬C.acuminata;上下喙基部均为黄色,可区分于繁殖后期的长趾滨鹬C.subminuta。进一步查阅资料,在《浙江动物志(鸟类)》(诸葛阳等,1990)、《浙江鸟类名录更新》(陈水华等,2012)、《中国鸟类分类与分布名录(第三版)》(郑光美,2017)中均没有斑胸滨鹬的浙江分布记载。2021年5月2日和8日,分别在南湖湿地和玉环漩门湾湿地观测拍摄到1只斑胸滨鹬。因此,确认其为浙江省鸟类新记录。 相似文献
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When trans, trans-farnesol [4,8,12-14C3,1-3H2] is isomerized to cis, trans-farnesol by soluble enzymes from Andrographis paniculata tissue cultures, 50% of the tritium label is lost. The same loss is observed when isomerization occurs in the opposite direction. This is in accordance with the proposed mechanism for isomerization via aldehydes. 相似文献
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Mathieu Auzias 《Inorganica chimica acta》2006,359(3):1012-1017
The dinuclear ruthenium complexes Ru2(CO)4(OOCC5H4FeC5H5)2L2 (L = NC5H5: 1, L = PPh3: 2) have been synthesized from Ru3(CO)12, ferrocene carboxylic acid and pyridine or triphenylphosphine, respectively. The single-crystal X-ray structure analysis reveals for 1 and 2 a Ru2(CO)4 sawhorse backbone with the two ferrocenyl substituents of the two carboxylato bridges being endo/exo with respect to each other in the solid state. With the new pyridine derivative NC5H4OOCC5H4FeC5H5 (4-ferrocenoyl pyridine) (3) as axial ligand, the complex Ru2(CO)4(OOCC5H4FeC5H5)2(NC5H4OOCC5H4FeC5H5)2 (4) was obtained, the single crystal X-ray structure analysis showing an exo/exo orientation of the two carboxylato bridges in the solid state. The endo/endo orientation is found in the solid-state structure of Ru2(CO)4(HNOCC5H4FeC5H5)2(PPh3)2 (5), the two OCNH bridges being transoïd with respect to each other; this complex is accessible from Ru3(CO)12, ferrocenamide and triphenylphosphine. 相似文献
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Of the 49 species of Solanum studied, cuscohygrine has been detected in 25, solamine and related amines in 17 and solamine-derived amides in 16. Five species of Cyphomandra examined all contained both amines and amides. From roots of Margaranthus solanaceus cuscohygrine has been isolated which probably occurs, too, in roots of Lycianthes rantonnettii. The distribution of these compounds throughout the taxa could be of chemotaxonomic value. 相似文献
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From three of five investigated species of Griselinia a new iridoid glucoside, griselinoside, was isolated. It was found to be present also in foliage of Aralidium pinnatifidum and Toricellia angulata, accompanied in the former by aralidioside another novel iridoid glucoside. The structures and absolute configurations of the two iridoids were elucidated by NMR spectroscopy and chemical conversions. From G. littoralis and T. angulata the glucosides magnolioside and syringoside respectively were isolated. 13C NMR spectra are given for thirteen iridoid derivatives. 相似文献
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The section Brunnei was extensively studied based on material from North Europe. To stabilise the nomenclature we studied the relevant types of taxa included in this section. Phylogenetic relationships and species limits were investigated using rDNA ITS sequences and the results were compared with the morphological data. We recognised 11 species: Cortinarius brunneus, C. clarobrunneus comb. nov., C. coleoptera, C. ectypus, C. gentilis, C. glandicolor (neotypified), C. pseudorubricosus, and four species described as new C. caesiobrunneus, C. albogaudis, C. carabus, and C. cicindela. They are described here and their taxonomy, ecology, distribution, and relationships are discussed. In addition, a key to species of the section Brunnei is provided. A total of 77 new sequences of 11 species are published including nine type sequences. Also the taxonomic assignments of sequences in the public databases belonging to the section Brunnei are revised. 相似文献
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This paper presents the advances made over the last decade in cryopreservation of economically important vegetatively propagated fruit trees. Cryopreservation protocols have been established using both dormant buds sampled on field-grown plants and shoot tips sampled on in vitro plantlets. In the case of dormant buds, scions are partially dehydrated by storage at − 5 °C, and then cooled slowly to − 30 °C using low cooling rates (c.a. 1 °C/h) before immersion in liquid nitrogen. After slow rewarming and rehydration of samples, regrowth takes place either through grafting of buds on rootstocks or excision of apices and inoculation in vitro. In the case of shoot tips of in vitro plantlets, the cryopreservation techniques employed are the following: controlled rate cooling procedures involving slow prefreezing followed by immersion in liquid nitrogen or vitrification-based procedures including encapsulation–dehydration, vitrification, encapsulation–vitrification and droplet-vitrification. The current status of cryopreservation for a series of fruit tree species including Actinidia, Diospyros, Malus, Olea, Prunus, Pyrus and Vitis is presented. Routine application of cryopreservation for long-term germplasm storage in genebanks is currently limited to apple and pear, for which large cryopreserved collections have been established at NCGRP, Fort Collins (USA), using dormant buds and in vitro shoot tips, respectively. However, there are a growing number of examples of pilot scale testing experiments under way for different species in various countries. Progress in the further development and application of cryopreservation techniques will be made through a better understanding of the mechanisms involved in the induction of tolerance to dehydration and cryopreservation in frozen explants. 相似文献
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Monika Marek-Kozaczuk Agnieszka Leszcz Jerzy Wielbo Sylwia Wdowiak-Wróbel Anna Skorupska 《Systematic and applied microbiology》2013
The taxonomic status of the Rhizobium sp. K3.22 clover nodule isolate was studied by multilocus sequence analysis (MLSA) of 16S rRNA and six housekeeping chromosomal genes, as well as by a subsequent phylogenic analysis. The results revealed full congruence with the Rhizobium pisi DSM 30132T core genes, thus supporting the same taxonomic position for both strains. However, the K3.22 plasmid symbiosis nod genes demonstrated high sequence similarity to Rhizobium leguminosarum sv. trifolii, whereas the R. pisi DSM 30132Tnod genes were most similar to R. leguminosarum sv. viciae. The strains differed in the host range nodulation specificity, since strain K3.22 effectively nodulated red and white clover but not vetch, in contrast to R. pisi DSM 30132T, which effectively nodulated vetch but was not able to nodulate clover. Both strains had the ability to form nodules on pea and bean but they differed in bean cultivar specificity. The R. pisi K3.22 and DSM 30132T strains might provide evidence for the transfer of R. leguminosarum sv. trifolii and sv. viciae symbiotic plasmids occurring in natural soil populations. 相似文献
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Many plants are adapted to an eroded landscape with a large proportion of virgin soil. Open and disturbed soils are today almost only restricted to agricultural fields with high loads of fertilizers. We conducted a pot experiment in order to investigate growth and nutritional constraints of one calcicole species, Anisantha (syn. Bromus) tectorum, and one calcifuge species, Rumex acetosella, in decalcified topsoil and recently exposed calcareous subsoil from a field experiment in sandy grassland. In the pot experiment we implemented one treatment where we limed topsoil with CaCO3 to the same amount as in subsoil.The subsoil had approximately 10% CaCO3 and both species grew less in this soil compared to the topsoil, which had less than 1% CaCO3. Germination rate of A. tectorum was higher in subsoil than in topsoil or limed topsoil. P fertilization of the limed topsoil counteracted the negative liming effect for A. tectorum, but only partly so for R. acetosella. P fertilization of subsoil increased the shoot biomass of A. tectorum, but not of R. acetosella. P concentration in plants was not reduced when growing on subsoil or limed topsoil compared to topsoil. The results show that lime addition may reduce the P availability also to calcicole species such as A. tectorum and we found indications for that Ca toxicity may be a causing factor for the calcifuge behavior of R. acetosella. The significance of the results for conservation management practices in sandy grasslands is discussed. 相似文献