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正矿产资源是国民经济建设的重要物质基础,矿产资源安全事关国家经济安全及国防安全。党的十九大做出中国特色社会主义进入了新时代的重要论断,并指出我国经济已由高速增长阶段转向高质量发展阶段,正处在转变发展方式、优化经济结构、转换增长动力的攻关期。新时代的新变化将深刻影响国家矿产资源安全格局、战略重点及其政策。经济增长放缓将对矿产资源的供需规模产生重要影响,新一轮科技革命与产业变革将加快对矿产资源供需结构的调整,生态文明建设、国家"一带一路"等 相似文献
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石铸 《中国科学院研究生院学报》1984,22(6):445-455
Since the 19th century many botanists have studied the Chinese Cirsium
and a great number of taxa or names has been reported, of which many still need to be
reviewed critically
This work is a preliminaxy result of study on Chinese species of Cirsium. As many
as 65 taxan or names in the literature are reduced to synonym in this paper. The Cir-
sium in China so far known comprises 49 species, of which 9 are described as new, 1 is
a new combination and 4 are new records in Chinese flora. These new species are: C.
subulariforme Shih, S. muliense Shih, C. fanjingshanense Shih, C. periacanthaceum Shih,
C. racemiforme Ling et Shih, C. vernonioides Shih, C. chrysolepis Shih, C. tenuifolium
Shih and the new combination is C. viridifolium (Hand. -Mazz.) Shih. The new records
in China are C. serratuloides (L.) Hill., C. incanum (S. G. Gmel.) Fisch. ex MB., C. la-
natum (Roxb. ex Willd.) Spreng and C. alatum (S. G. Gmel) Bobr.
The Chinese Cirsium is divided into 8 sections in the present paper, of which 3 are
new, namely, Sect. Isolepis Shih, Sect. Tricholepis Shilh and Sect. Hymenolepis Shih,
and I is a new combination, namely, Sect. Spanioptilon (Cass.) Shih. In addition, a new species of the genus Alfredia, A. aspera Slih, is described. 相似文献
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Gilbertella属的一个新种 总被引：1，自引：0，他引：1
A species of Gilbertella was isolated from dung of swine collected from Hainan,
Kwangtung Province, and described as a new species (Gilbertella hainanensis sp. nov.).
Morphologically, it differs from G. persicaria, the only other species of Gilbertella,
mainly in spore characters. The spores of G. persicaria are oval to nearly spherical,
often pointed and bearing 3-6 appendages at each end; while those of the present species
are elongate-oval, reniform or oval, with ends obtuse, never pointed and bearing 6-12
appendages. The appearances of the two species in culture are also different. In colour
G. persicaria is grayish-brown and G. hainanensis is blackish-gray.
When inoculated on peach fruit, G. hainanensis causes no rot, while all strains of G.
persicaria isolated from various kinds of substratum readily cause rotting of the entire
peach in 5-6 days.
The culture of G. hainanensis at hand, being a minus strain, has been found to form
mature zygospores when grown together with the plus strain of G. persicaria. The two
suspensors of the zygospore thus formed are heterogeneous either in shape or in dimen-
sion, one of the suspensors closely resembles those of G. persicaria, while the other is
quite different.
Type culture of G. hainanensis is deposited in the Institute of Microbiology, AcademiaSinica, Peking, China. 相似文献
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程用谦 《中国科学院研究生院学报》1993,31(4):362-367
The genus, Ainsliaea DC. from China is revised in this paper. Three
species, A. nana Y. C. Tseng, A. pingbianensis Y. G. Tseng and A. trinervis Y.
C. Tseng, are newly described; two species, A. chapaensis Merr. and A.
angustifolia Hook. f. et Thoms. ex C. B. Clarke are new records for China and
two new combinations, A. apteroides (Chang) Y. C. Tseng and A.
macrocephala (Mattf.) Y. C. Tseng, are made. In addition, one species, A.
hypoleuca Diels ex Limpr. and four varieties, A. bonatii Beauverd var.
arachnoidea Beauverd, A. pteropoda DC. var. leiophylla Franch., A. elegans
Hemsl. var. tomentosa Mattf. and A. glabra Hemsl. var. tenuiculis (Mattf.)Chang, are reduced to synonyms. 相似文献
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本文对国产7种甘草属植物的核型进行了研究，其结果为：乌拉尔甘草2n＝16＝
6m+10sm；黄甘草2n＝16=8m+6sm十2st；光果甘草2n＝16=14m+2sm；胀果甘
草2n＝16＝6m十10sm；粗毛甘草2n=16=12m十4sm；云南甘草20＝16=12m十
4sm；刺果甘草2n＝16＝12m十4sm。基于对现有资料的分析，确认该属的染色体基数为
x=8， 且核型对称性程度较高。 通过对不同种核型进行比较，发现刺果甘草是本文所研究
7个种中最原始的，而黄甘草的进化程度相对较高。 相似文献
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魏江春 《中国科学院研究生院学报》1966,11(1):1-10
In the present paper a new species of Lasallia Merat is described and placed under
a new subgenus Pleiogyra, characterized by having econcentrical multi-gyrate apothecia. In
consequence of this finding, the conception of plane disc in the genus Lasallia of Umbili-
cariaceae becomes untenable.
As a result of careful examination of rich materials, the writer considers the dif-
ference in disc found by Scholander among all species of the family is of certain signifi-
cance for classification. Unfortunately, Scholander’s classification is based solely on this
rather variable morphological character. If his view be adopted the new species will have
to be inserted into the genus Gyrophora Ach. emend. Schol. If accepting Llano’s division
of Umbilicariaceae into five genera, namely Lasallia, Agyrophora, Omphalodiscus, Umbili-
caria and Actinogyra, the new species will have to be considered a new genus of the
family.
The present writer considers both Scholander’s and Llano’s systems as being artificial,
because the former author emphasizes too much the unstable morphological appearance of
disc and the later simply divides the family into five genera simultaneously on the basis
of the stable and unstable characters of the various groups. In contrast with Scholander’s
and Llano’s systems Frey’s classification neglects wholly the difference in the characters of
disc. Such treatment is likewise unsound. The present writer supports the view held by
Flotow, Koerber, Elenkin and Savicz (1950). Nevertheless, he does not agree with Savicz
in erecting the subgenus Gyrophoropsis (Elenk. et Savicz) Savicz, because muriform spores
are present not only in the group having gyrate discs, but also in the groups having plane
and omphalic discs of the Genus Umbilicaria Hoffm. emend. Vej. The recognition of this
subgenus must therefore deny the basis on which the other four subgenera are established.
The system of Umbilicariaceae held by the writer is as follows:
I. Genus Lasallia Merat emend. Vej ...... Thallus pustulate; disc plane to econcentrical multi-gyrate; spores
1(2) per ascus, quite large, muriform.
1. Subgenus Lasallia...Disc plane.
2. Subgenus Pleiogyra Vej ...... Disc econcentrical multigyrate.
II. Genus Umbilicaria Hoffm. emend. Vej (syn. Gyrophora Ach. emend. Savicz)* ...Thallus non-pustulate;
disc plane and smooth or plane with central sterile column (or fissure) or with gyri; spores 8 per ascus,
simple, hyaline or becoming brown muriform, small.
1. Subgenns Agyrophora (Nyl.) Savicz ...... Disc plane.
(1) Section Agyrophora (syn. sect. Anthracinae emend. Llano). ..... Spores simple and hyaline.
(2) Section Dichroae Llano ...... Spores becoming brown muriform.
2. Subgenus Omphalodiscus (Schol.) Savicz ...... Disc with central sterile column or fissure.
(1) Section Omphalodiscus (syn. sect. Decussatae Schol.) ...... Spores simple and hyaline.
(2) Section Spodochroae Schol. ..... Spores becoming muriform.
3. Subgenus Umbilicaria...Disc with concentrical gyri; spores simple and hyaline or becoming muriform.
(1) Section Umbilicaria (syn. sect. Simplices Llano) ...... Spores simple and hyaline.
(2) Section Gyrophoropsis (Elenk. et Savicz) A. Zahlbr. (syn. sect. Muriformes Llano) ...... Spores
becoming muriform.4. Subgenus Actinogyra (Schol.) Savicz ...... Disc with radial gyri, proper margin absent. 相似文献
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姚淦 《中国科学院研究生院学报》1992,30(2):179-180
A new species and a new record for China of the genus Adoxa L.are reported from Xizang, China. They are Adoxa xizangensis G.Yao and Adoxa inodora (Falc.ex C.B.Clarke) Nepomn. 相似文献
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本文报道了轮藻科2新种、1新变种、5个中国新记录：嫩江丽藻Nitella nenjiangensis sp.
nov.,轮苞轮藻 Chara vertillibracteata sp. nov., 球状轮藻北京变种 Chara globularis Thuiller
var. beijingensis var. nov., 腋生丽藻 Nitella axillaris Braun, 卷曲丽藻N. crispa Imah.,柔细
丽藻N. gracillima Allan, 拟扇形丽藻不完全变种N. pseudoflabellata var. imperialis,阿鲁轮藻
Chara arrudensis Mendes. 相似文献
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本文叙述了木蓝属系统研究的简史，对该属形态特征的演化趋势及属下分类进行系统
研究，根据植物习性、叶的特征、果实形态及含种子数，将国产木蓝属80种，1变种归纳为3亚
属，并将木蓝亚属分为14亚组，其中包括9个新亚组，对其中一些种类作了归并及处理，并编 写了分种检索表。 相似文献