共查询到20条相似文献,搜索用时 31 毫秒
1.
《Biochemical Systematics and Ecology》2005,33(7):675-679
The inflorescences of Eleocharis elegans and Eleocharis sellowiana were investigated by dynamic headspace/GC–MS for the presence of volatiles. No floral volatile was detected in the inconspicuous inflorescences of E. sellowiana but various floral volatiles were produced by the showy inflorescences of E. elegans. The results are discussed in their ecological and evolutionary context. 相似文献
2.
3.
4.
5.
Nil Rahola Jér?me Depaquit Boris Kevin Makanga Christophe Paupy 《Memórias do Instituto Oswaldo Cruz》2013,108(7):845-849
During a research project aimed at the study of the Culicinae fauna of Gabon and
carried out in the National Park of La Lopé, we captured an unknown sandfly male
specimen (genus Phlebotomus) by CDC miniature light trap
belonging to a new species for Science. Furthermore, the originality of his
genitalia does not allow us to include this species in one of the existing
subgenus, thus in this paper we propose the creation of a new subgenus, as
Phlebotomus (Legeromyia) multihamatus sp. nov., subg. nov.
described from the National Park of La Lopé, through one male captured with CDC
miniature light trap. A new species and a new subgenus of sandfly is
characterised by a short style with three spines, a paramere wearing a basal
hook as well as a basal pouch and the absence of basal lobe on the coxite. The
originality of the genitalia of the male gives way to discussion about potential
primary homologies between P. multihamatus sp. nov. and
Phlebotomus (Abonnencius) fortunatarum, Phlebotomus
(Anaphlebotomus) stantoni and Phlebotomus (Euphlebotomus)
argentipes, which should be verified for future studies. The
discovery of this new species in Gabon must encourage the study of sandflies in
this country. 相似文献
6.
7.
A male infant is described with unusual facial appearance, clubfeet, and moderate hydrocephalus internus without obvious deficiency in mental and physical development. Cytogenetic studies revealed a karyotype of 45,XY,--C,--D,+t(C;D). A chromosome 11 and a 13 are involved in the formation of the translocation chromosome. The long arm of chromosome 13 is linearly attached to the end of the long arm of chromosome 11 (tandem translocation). Chromosome material of the distal part of the long arm of chromosome 11, as well as the short arm plus the centromere of chromosome 13 seem to have been lost. 相似文献
8.
9.
The nematode Drilomermis leioderma n. gen., n. sp. (Merrnithidae) is described from larvae of Cybister fimbriolatus (Say) (Dytiscidae: Coleoptera) in Louisiana. Diagnostic characters of the genus Drilomermis are: medium-sized nematodes with the cuticle appearing smooth (lacking cross fibers) under the light microscope, six cephalic papillae, without mouth papillae, six hypodermal cords at midbody, 2 extremely long spicules (longer than 10 times body width at anus) which are separate and parallel (not twisted), an S-shaped vagina, medium-sized amphids located near head papillae, and postparasitic juvenile with a tail appendage. D. leioderma possesses a ventrally displaced mouth, very long vagina, and male genital papillae arranged in 3 double rows in the vicinity of the cloacal opening. Even when containing multiple parasites, about 40% of the hosts sulwived emergence of the memithids and lived several more days. In nature, some of these hosts may be able to continue their development, which is unusual since most mermithid-parasitized hosts die soon after the nematode emerges. 相似文献
10.
11.
12.
Meloidogyne nataliei n. sp. is described and illustrated from grape (Vitis labrusca) in a declining vineyard at Mattawan, Michigan, USA. Infected grape roots exhibit no hyperplastic symptoms. Females protrude from the roots and are surrounded by a massive egg sac containing many eggs. This new species is distinguishable from other species of the genus especially by its large, striking perineal pattern with, usually, two ropelike separated striae on each side extending laterally from the vulval and anal areas. Among other diagnostic characters are the location of the female excretory pore adjacent to or near the base of the head and the heavy larval stylet averaging about 22 μm in length. Examination of males, females, and larvae with the scanning electron microscope confirmed observations made by optical microscopy and revealed diagnostic and other structures in greater detail. Of particular significance was the nature of the male head, with a massive circular labial disc on which is located a rectangular structure surrounding the oral opening, and the six distinct lips appearing as a rosette in en face view. The known distribution of this new species is presently limited to its original location in Michigan. 相似文献
13.
14.
Dominique Hermann G. Victor Fazakerley Claude Houssier Wilhelm Guschlbauer 《Biopolymers》1984,23(5):945-960
The covalent binding of trans-Pt (NH3)2Cl2 to the double-stranded poly(I)·poly(C) follows three types of reactions, depending on rb and the concentration of polynucleotide in the reaction mixture. At rb ? 0.1, the principal reaction is coordination to poly(I), giving rise to some destabilization of the double strand, as shown by uv and CD spectra, and a decrease in Tm values, giving rise to free loops of poly(C). At higher rb and low polynucleotide concentration, the free cytidine bases react with platinum bound on the complementary strand to form intramolecular (interstrand) crosslinks that restabilize the double-stranded structure. At high rb and high polynucleotide concentration, while the above reaction still occurs, the predominant one is the formation of intermolecular crosslinks. Under no conditions has strand separation been observed. 相似文献
15.
16.
17.
18.
19.
Elizabeth T. Arias-Bohart 《ZooKeys》2015,(508):1-13
Malalcahuello
ocaresi
gen. n. & sp. n., from Chile, is described and compared with Campyloxenus
pyrothorax Fairmaire & Germain, 1860. 相似文献
20.