Determining the role of bacterial symbionts on the heat tolerance ofAdelges tsugae

2016 ◽  
Author(s):  
Angela M. Mech
Keyword(s):  
Heat Tolerance ◽  
Bacterial Symbionts

scholarly journals Bacterial influence on the maintenance of symbiotic yeast through Drosophila metamorphosis

2020 ◽  
Author(s):  
Robin Guilhot ◽  
Antoine Rombaut ◽  
Anne Xuéreb ◽  
Kate Howell ◽  
Simon Fellous
Keyword(s):  
Young Adults ◽  
Drosophila Melanogaster ◽  
Life Cycle ◽  
Symbiotic Bacteria ◽  
Bacterial Symbionts ◽  
Tripartite Symbiosis ◽  
Summary Statement ◽  
Key Features ◽  
Microbial Symbionts

AbstractInteractions between microbial symbionts of metazoan hosts are emerging as key features of symbiotic systems. Little is known about the role of such interactions on the maintenance of symbiosis through host’s life cycle. We studied the influence of symbiotic bacteria on the maintenance of symbiotic yeast through metamorphosis of the fly Drosophila melanogaster. To this end we mimicked the development of larvae in natural fruit. In absence of bacteria yeast was never found in young adults. However, yeast could maintain through metamorphosis when larvae were inoculated with symbiotic bacteria isolated from D. melanogaster faeces. Furthermore, an Enterobacteriaceae favoured yeast transstadial maintenance. Because yeast is a critical symbiont of D. melanogaster flies, bacterial influence on host-yeast association may have consequences for the evolution of insect-yeast-bacteria tripartite symbiosis and their cooperation.Summary statementBacterial symbionts of Drosophila influence yeast maintenance through fly metamorphosis, a novel observation that may have consequences for the evolution of insect-yeast-bacteria interactions.

Molecular breeding for improving heat stress tolerance in wheat.

2021 ◽  
pp. 82-89
Author(s):  
Kuo-hai Yu ◽  
Hui-ru Peng ◽  
Zhong-fu Ni ◽  
Ying-yin Yao ◽  
Zhao-rong Hu ◽  
...  
Keyword(s):  
Heat Stress ◽  
Heat Tolerance ◽  
Molecular Basis ◽  
Molecular Genetic ◽  
Wheat Breeding ◽  
Heat Response ◽  
Breeding Programmes ◽  
Resource Exploration ◽  
Heat Stress Tolerance

Abstract This paper discusses wheat responses to heat stress (including morphological and growth, cellular structure and physiological responses) and the molecular-genetic bases of heat response in wheat (including topics on mapping quantitative trait loci related to heat tolerance and the role of functional genes in response to heat stress). The improvement of heat tolerance of wheat by comprehensive strategies is also described. It is believed that with the emphasis on genetic resource exploration and with better understanding of the molecular basis, heat tolerance will be improved during wheat breeding programmes in the future.

scholarly journals Gut bacterial diversity and physiological traits of Anastrepha fraterculus Brazilian-1 morphotype males are affected by antibiotic treatment

2019 ◽  
Vol 19 (S1) ◽  
Author(s):  
María Laura Juárez ◽  
Lida Elena Pimper ◽  
Guillermo Enrique Bachmann ◽  
Claudia Alejandra Conte ◽  
María Josefina Ruiz ◽  
...  
Keyword(s):  
Nutritional Status ◽  
Reproductive Potential ◽  
Deep Understanding ◽  
Fruit Fly ◽  
Positive Contribution ◽  
Bacterial Symbionts ◽  
Physiological Mechanisms ◽  
Anastrepha Fraterculus ◽  
Symbiotic Organisms

Abstract Background The interaction between gut bacterial symbionts and Tephritidae became the focus of several studies that showed that bacteria contributed to the nutritional status and the reproductive potential of its fruit fly hosts. Anastrepha fraterculus is an economically important fruit pest in South America. This pest is currently controlled by insecticides, which prompt the development of environmentally friendly methods such as the sterile insect technique (SIT). For SIT to be effective, a deep understanding of the biology and sexual behavior of the target species is needed. Although many studies have contributed in this direction, little is known about the composition and role of A. fraterculus symbiotic bacteria. In this study we tested the hypothesis that gut bacteria contribute to nutritional status and reproductive success of A. fraterculus males. Results AB affected the bacterial community of the digestive tract of A. fraterculus, in particular bacteria belonging to the Enterobacteriaceae family, which was the dominant bacterial group in the control flies (i.e., non-treated with AB). AB negatively affected parameters directly related to the mating success of laboratory males and their nutritional status. AB also affected males’ survival under starvation conditions. The effect of AB on the behaviour and nutritional status of the males depended on two additional factors: the origin of the males and the presence of a proteinaceous source in the diet. Conclusions Our results suggest that A. fraterculus males gut contain symbiotic organisms that are able to exert a positive contribution on A. fraterculus males’ fitness, although the physiological mechanisms still need further studies.

scholarly journals THE IDENTIFICATION OF BACTERIAL SYMBIONT’S OF THE LARVAE ORYCTES RHINOCEROS L. AND THE ROLE OF THE BACTERIA IN COMPOSTING PROCESS

2018 ◽  
Vol 1 (2) ◽  
pp. 43 ◽  
Author(s):  
Octanina Sari Sijabat ◽  
Marheni Marheni ◽  
Darma Bakti
Keyword(s):  
16S Rrna ◽  
16S Rdna ◽  
Plant Material ◽  
Bacterial Species ◽  
Symbiotic Bacteria ◽  
Bacterial Symbionts ◽  
Speed Up ◽  
Hind Gut ◽  
Micro Organisms

AbstractOryctes rhinoceros L. has symbioses with micro organisms in their hind guts which further break down plant material consumed by beetle. The aim of this research is to determine the identification of the existence of the bacterial species in the hind gut larvae of the symbiotic bacteria using biochemical test and analysis based on 16S rRNA. The result of this research indicate that there were two different bacterials: Bacillus siamensis and Bacillus stratosphericus found. The bacteria was used for starting the composting and more specifically, the Bacillus siamensis can speed up composting with the end result at C/N 13.16.Keywords: Larvae O. rhinoceros L, Bacterial Symbionts, 16S rDNA, Composting

Census of heat tolerance among Florida's threatened staghorn corals finds resilient individuals throughout existing nursery populations

2021 ◽  
Vol 288 (1961) ◽  
Author(s):  
Ross Cunning ◽  
Katherine E. Parker ◽  
Kelsey Johnson-Sapp ◽  
Richard F. Karp ◽  
Alexandra D. Wen ◽  
...  
Keyword(s):  
Heat Tolerance ◽  
Thermal Tolerance ◽  
Dominant Role ◽  
Acropora Cervicornis ◽  
Rapid Loss ◽  
Response Curves ◽  
Climate Resilience ◽  
Stress Dose ◽  
Conservation Interventions

The rapid loss of reef-building corals owing to ocean warming is driving the development of interventions such as coral propagation and restoration, selective breeding and assisted gene flow. Many of these interventions target naturally heat-tolerant individuals to boost climate resilience, but the challenges of quickly and reliably quantifying heat tolerance and identifying thermotolerant individuals have hampered implementation. Here, we used coral bleaching automated stress systems to perform rapid, standardized heat tolerance assays on 229 colonies of Acropora cervicornis across six coral nurseries spanning Florida's Coral Reef, USA. Analysis of heat stress dose–response curves for each colony revealed a broad range in thermal tolerance among individuals (approx. 2.5°C range in F v /F m ED50), with highly reproducible rankings across independent tests ( r = 0.76). Most phenotypic variation occurred within nurseries rather than between them, pointing to a potentially dominant role of fixed genetic effects in setting thermal tolerance and widespread distribution of tolerant individuals throughout the population. The identification of tolerant individuals provides immediately actionable information to optimize nursery and restoration programmes for Florida's threatened staghorn corals. This work further provides a blueprint for future efforts to identify and source thermally tolerant corals for conservation interventions worldwide.

Exertional Heat Stroke, the Return to Play Decision, and the Role of Heat Tolerance Testing

2018 ◽  
Vol 17 (7) ◽  
pp. 244-248 ◽  
Author(s):  
Francis G. OʼConnor ◽  
Yuval Heled ◽  
Patricia A. Deuster
Keyword(s):  
Heat Tolerance ◽  
Heat Stroke ◽  
Return To Play ◽  
Exertional Heat Stroke ◽  
Tolerance Testing

scholarly journals Current Clinical Concepts: Heat Tolerance Testing

2021 ◽  
Author(s):  
Cody R. Butler ◽  
Erin Dierickx ◽  
Michelle Bruneau ◽  
Rebecca Stearns ◽  
Douglas J. Casa
Keyword(s):  
Heat Tolerance ◽  
Best Practice ◽  
Heat Stroke ◽  
Strength Of Evidence ◽  
Practice Recommendations ◽  
Israeli Defense Force ◽  
Performance Interpretation ◽  
Future Direction ◽  
Tolerance Testing

ABSTRACT Heat tolerance testing (HTT) has been developed to assess readiness for work or exercise in the heat based on thermoregulation during exertion. Although the Israeli Defense Force protocol has been the most widely utilized and referenced, other protocols and variables considered in the interpretation of the test are emerging. Therefore, the purpose of this “Current Clinical Concepts” manuscript is to summarize the role of HTT following an exertional heat stroke (EHS), assess the validity of HTT, and to provide a review of best practice recommendations to guide clinicians, coaches and researchers in the performance, interpretation, and future direction of HTT. Furthermore, we will provide the strength of evidence for these recommendations using the Strength of Recommendation Taxonomy system.

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