Spermatogenesis of various hybrids of the genus Lemur was studied by testicular biopsy. In hybrids between species whose classification is still much debated, the germinal cells had degenerated after the pachytene stage. This abnormality was variable in intensity depending on the parents mating: L. fulvus (2N = 60) subspecies x L. macaco sometimes resulted in fertile offspring while L. fulvus collaris x L. macaco never did. We believe that the defect in spermatogenesis is mostly caused by differences in meiotic behaviour in the germinal cells. In hybrids between two species for which there is not taxonomic doubt (L. fulvus x L. rubriventer), the gonads were completely devoid of germ cells.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1530/jrf.0.0660717 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
sp. nov. and sp. nov., two novel species isolated from alkaline magnesite residues.
Int J Syst Evol Microbiol
January 2025
Department of Life Sciences, University of Coimbra, CEMMPRE, ARISE, Coimbra, Portugal.
Three bacterial strains, designated FZUC8N2.13, FBOR7N2.3 and FZUR7N2.
View Article and Find Full Text PDFsp. nov. and sp. nov., two bacteria isolated from marine sediment in the East China Sea.
Int J Syst Evol Microbiol
January 2025
Li Dak Sum Yip Yio Chin Kenneth Li Marine Biopharmaceutical Research Center, Ningbo University, Ningbo 315800, PR China.
Two Gram-stain-negative, curved-rod-shaped, non-motile and aerobic bacteria W6 and I13 were isolated from marine sediment samples collected from Meishan Island located in the East China Sea. Catalase and oxidase activities and hydrolysis of Tween 40, 60 and 80 were positive for both strains, while nitrate reduction, indole production, methyl red reaction and HS production were negative. Phylogenetic analyses based on 16S rRNA and genome sequences revealed that strains W6 and I13 formed distinct phylogenetic lineages within the genera and , respectively.
View Article and Find Full Text PDFArabidopsis CIRP1 E3 ligase modulates drought and oxidative stress tolerance and reactive oxygen species homeostasis by directly degrading catalases.
J Integr Plant Biol
January 2025
Key Laboratory of National Forestry and Grassland Administration on Plant Conservation and Utilization in Southern China & Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, 510650, China.
Reactive oxygen species (ROS) plays critical roles in modulating plant growth and stress response and its homeostasis is fine tuned using multiple peroxidases. HO, a major kind of ROS, is removed rapidly and directly using three catalases, CAT1, CAT2, and CAT3, in Arabidopsis. Although the activity regulations of catalases have been well studied, their degradation pathway is less clear.
View Article and Find Full Text PDFNeptunitalea lumnitzerae sp. nov. isolated from the phyllosphere of the mangrove Lumnitzera racemosa Willd.
Antonie Van Leeuwenhoek
January 2025
Institute of Plant Science and Resources, Okayama University, Okayama, Japan.
A Gram-stain-negative, rod-shaped, non-motile, aerobic, light-yellow-pigmented bacterium, designated as strain Y10, was isolated from Lumnitzera racemosa leaf in Iriomote island mangrove forests in Japan. The 16S rRNA gene sequence analysis revealed that the isolate Y10 was affiliated with the family Flavobacteriaceae, and the sequence showed the highest sequence identity to that of Neptunitalea chrysea NBRC 110019 (97.2%) and others with below 96% sequence identity.
View Article and Find Full Text PDFComplete genome sequences of associated with mortality events in avian species.
Microbiol Resour Announc
January 2025
Department of Infectious Diseases, Athens Veterinary Diagnostic Laboratory, The University of Georgia, Athens, Georgia, USA.
is a potential bacterial pathogen that affects chickens. We present 22 complete genome sequences of clinical isolates to facilitate the genomic analysis and the development of diagnostic tools.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!