Résumé
Lower termites harbor diverse consortia of symbiotic gut flagellates. Despite numerous evidence for co-cladogenesis, the evolutionary history of these associations remains unclear. Here, we present Retractinymphidae fam. nov., a monogeneric lineage of Trichonymphida from Serritermitidae. Although
Retractinympha glossotermitis
gen. nov. sp. nov. morphologically resembles members of the genus
Pseudotrichonympha
, phylogenetic analysis identified it as sister group of the Teranymphidae. We compared morphology and ultrastructure of
R
.
glossotermitis
to that of
Pseudotrichonympha
and other Teranymphidae, including the so-far undescribed
Pseudotrichonympha solitaria
sp. nov. from
Termitogeton planus
(Rhinotermitidae). Like all Teranymphidae,
R
.
glossotermitis
is a large, elongated flagellate with a bilaterally symmetric rostrum, an anterior, flagella-free operculum, and an internal rostral tube. However, it is readily distinguished by the length of its rostral flagella, which never exceeds that of the postrostral flagella, and its retractable anterior end. Inclusion of the hitherto unstudied
Stylotermes halumicus
(Stylotermitidae) in our survey of trichonymphid flagellates in Neoisoptera confirmed that the combined presence of
Heliconympha
and
Retractinympha
and absence of
Pseudotrichonympha
is unique to Serritermitidae. The close phylogenetic relatedness of
Heliconympha
in Serritermitidae to the spirotrichosomid flagellates in Stolotermitidae provides strong support for their acquisition by horizontal transmission.
Auteurs, date et publication :
Auteurs Renate Radek , Katja Platt , Deniz Öztas , Jan Šobotník , David Sillam-Dussès , Robert Hanus , Andreas Brune
Publication : Frontiers in Ecology and Evolution
Date : 2023
Volume : 11
Pages : 1111484
Catégorie(s)
#CNRS #FORET NouraguesAuteurs, date et publication :
Auteurs C. Giguet-Covex , G. F. Ficetola , K. Walsh , J. Poulenard , M. Bajard , L. Fouinat , P. Sabatier , L. Gielly , E. Messager , A. L. Develle , F. David , P. Taberlet , E. Brisset , F. Guiter , R. Sinet , F. Arnaud
Publication : Scientific Reports
Date : 2025
Volume : 9
Issue : 1
Pages : 14676
Catégorie(s)
#CNRS #eDNAAuteurs, date et publication :
Auteurs Julie Feinstein , Kenneth L Purzycki , Scott Mori , Vanessa Hequet , Amy Berkov
Publication : The Journal of the Torrey Botanical Society
Date : 2025
Volume : 135
Issue : 2
Pages : 200-207
Catégorie(s)
#CNRS #FORET NouraguesRésumé
Prenatal maternal effects can be a source of phenotypic plasticity and may play a role in adaptation to climate change. However, we do not know how far temperature could influence such effects, if at all. We studied the influence of temperature during egg laying on maternal reproductive investment and on the phenotype of adult females, adult males, and nestlings. We expected temperature to have an effect, as it influences maintenance costs for females, who can also use it as a cue of the advancement of the breeding season. We experimentally increased night-time nest-box temperatures by approximately 1 degrees C throughout the entire laying period in great tits (Parus major). Clutch size was negatively correlated with laying date in heated females. Heated females did not delay incubation after clutch completion as frequently as control females did. Finally, blood sedimentation rate, which is an indicator of acute infections and inflammatory diseases, was positively correlated with hatching date in control broods. This suggests that nestlings were of lower quality in late-hatched broods than in early-hatched broods. This seasonal effect was not detected in heated nests. Our results show that a small increase in temperature during laying can influence breeding strategy and nestling characteristics. These results suggest that birds used temperature as a cue of seasonal advancement to adjust breeding phenology, with beneficial effects on nestling health. To better understand the consequences of maternal adjustments during egg laying, it would be interesting to combine studies with heating treatment during different periods of the breeding cycle.
Auteurs, date et publication :
Auteurs Josefa Bleu , Simon Agostini , Clotilde Biard
Publication : BEHAVIORAL ECOLOGY
Date : 2017
Volume : 28
Issue : 3
Pages : 793-802
Catégorie(s)
#ANR-Citation #CEREEP #CNRS #ENSAuteurs, date et publication :
Auteurs Charlotte Kounda-Kiki , Léonide Celini , Jean-François Ponge , Philippe Mora , Corinne Sarthou
Publication : Soil Biology and Biochemistry
Date : 2025
Volume : 41
Issue : 2
Pages : 323-329
Catégorie(s)
#CNRS #FORET NouraguesAuteurs, date et publication :
Auteurs Sean McCann , Onour Moeri , Tanya Jones , Sean O'Donnell , Gerhard Gries
Publication : Journal of Raptor Research
Date : 2025
Volume : 44
Issue : 3
Pages : 236-240
Catégorie(s)
#CNRS #FORET NouraguesRésumé
Abstract The Neotropical Neoponera laevigata species-group is revised. This group can be separated from others in the genus by means of a new key to Neoponera species–groups. We propose two new species, N. gojira sp. nov., and N. mashpi sp. nov., the latter being usually confused with its putative sister species, N. laevigata (Smith). This small, termite-feeding species-group now contains five taxa. We provide comprehensive redescriptions for the known castes of the three previously known species, together with images and notes about intraspecific morphological variation, biology, and distribution of the taxa here treated. We reveal the external morphological features of the genitalia of the known males. This is the first contribution en route to a better understanding of the systematics of this charismatic ponerine genus.
Auteurs, date et publication :
Auteurs Adrian Troya , John Lattke
Publication : Insect Systematics & Evolution
Date : 2022
Volume : -1
Issue : aop
Pages : 1-76
Catégorie(s)
#CNRS #FORET NouraguesAuteurs, date et publication :
Auteurs Cony Decock , Leif Ryvarden
Publication : Plant Ecology and Evolution
Date : 2025
Volume : 146
Issue : 2
Pages : 234-239
Catégorie(s)
#CNRS #FORET NouraguesAuteurs, date et publication :
Auteurs Jessica L Deichmann , Catherine A Toft , Peter M Deichmann , Albertina P Lima , G Bruce Williamson
Publication : Journal of Tropical Ecology
Date : 2025
Volume : 28
Issue : 5
Pages : 427
Catégorie(s)
#CNRS #FORET NouraguesRésumé
The elevation of atmospheric CO2 leads to a decline in plant mineral content, which might pose a significant threat to food security in coming decades. Although few genes have been identified for the negative effect of elevated CO2 on plant mineral composition, several studies suggest the existence of genetic factors. Here, we performed a large-scale study to explore genetic diversity of plant ionome responses to elevated CO2, using six hundred Arabidopsis thaliana accessions, representing geographical distributions ranging from worldwide to regional and local environments. We show that growth under elevated CO2 leads to a global decrease of ionome content, whatever the geographic distribution of the population. We observed a high range of genetic diversity, ranging from the most negative effect to resilience or even to a benefit in response to elevated CO2. Using genome-wide association mapping, we identified a large set of genes associated with this response, and we demonstrated that the function of one of these genes is involved in the negative effect of elevated CO2 on plant mineral composition. This resource will contribute to understand the mechanisms underlying the effect of elevated CO2 on plant mineral nutrition, and could help towards the development of crops adapted to a high-CO2 world.
Auteurs, date et publication :
Auteurs Oceane Cassan , Lea-Lou Pimpare , Timothy Mozzanino , Cecile Fizames , Sebastien Devidal , Fabrice Roux , Alexandru Milcu , Sophie Lebre , Alain Gojon , Antoine Martin
Publication : eLife
Date : 2024
Volume : 12
Pages : RP90170