Nutrients, but not genetic diversity, affect Gracilaria chilensis (Rhodophyta) farming productivity and physiological responses

2018 ◽  
Vol 54 (6) ◽  
pp. 860-869 ◽  
Author(s):  
Sara Usandizaga ◽  
Carolina Camus ◽  
José Luis Kappes ◽  
Marie Laure Guillemin ◽  
Alejandro H. Buschmann
Keyword(s):  
Genetic Diversity ◽  
Physiological Responses ◽  
Gracilaria Chilensis

scholarly journals Changing environments and genetic variation: natural variation in inbreeding does not compromise short-term physiological responses

2019 ◽  
Vol 286 (1915) ◽  
pp. 20192109 ◽  
Author(s):  
James Buckley ◽  
Rónán Daly ◽  
Christina A. Cobbold ◽  
Karl Burgess ◽  
Barbara K. Mable
Keyword(s):  
Genetic Diversity ◽  
Genetic Variation ◽  
Physiological Responses ◽  
Flowering Phenology ◽  
Mating Strategies ◽  
Relative Fitness ◽  
Evolutionary Potential ◽  
Short Term ◽  
Arabidopsis Lyrata ◽  
Physiological Capacity

Selfing plant lineages are surprisingly widespread and successful in a broad range of environments, despite showing reduced genetic diversity, which is predicted to reduce their long-term evolutionary potential. However, appropriate short-term plastic responses to new environmental conditions might not require high levels of standing genetic variation. In this study, we tested whether mating system variation among populations, and associated changes in genetic variability, affected short-term responses to environmental challenges. We compared relative fitness and metabolome profiles of naturally outbreeding (genetically diverse) and inbreeding (genetically depauperate) populations of a perennial plant, Arabidopsis lyrata , under constant growth chamber conditions and an outdoor common garden environment outside its native range. We found no effect of inbreeding on survival, flowering phenology or short-term physiological responses. Specifically, naturally occurring inbreeding had no significant effects on the plasticity of metabolome profiles, using either multivariate approaches or analysis of variation in individual metabolites, with inbreeding populations showing similar physiological responses to outbreeding populations over time in both growing environments. We conclude that low genetic diversity in naturally inbred populations may not always compromise fitness or short-term physiological capacity to respond to environmental change, which could help to explain the global success of selfing mating strategies.

scholarly journals Changing environments and genetic variation: inbreeding does not compromise short-term physiological responses

2019 ◽  
Author(s):  
James Buckley ◽  
Rónán Daly ◽  
Christina Cobbold ◽  
Karl Burgess ◽  
Barbara K. Mable
Keyword(s):  
Genetic Diversity ◽  
Genetic Variation ◽  
Mating System ◽  
Physiological Responses ◽  
Mating Strategies ◽  
Outdoor Environment ◽  
Relative Fitness ◽  
List Type ◽  
Short Term ◽  
Wide Range

ABSTRACTSelfing plant lineages are surprisingly widespread and successful in a broad range of environments, despite showing reduced genetic diversity, which is predicted to reduce long-term evolutionary potential. However, short-term capacity to respond appropriately to new conditions might not require high levels of standing genetic variation. The purpose of this study was to directly test whether mating system variation and its associated changes in genetic variability in natural populations affected responses to short-term environmental challenges.We compared relative fitness and metabolome profiles of naturally outbreeding (genetically diverse) and inbreeding (genetically depauperate) populations of a long-lived perennial plant, Arabidopsis lyrata, under constant growth chamber conditions and an outdoor common garden environment outside its native range.We found no effect of mating system on survival or reproductive output, although several phenological traits showed different associations with latitude for outcrossing and inbreeding populations. Natural inbreeding had no effect on the plasticity of physiological responses, using either multivariate approaches or analysis of variation in individual metabolites. Moreover, while both growing environment and time significantly affected the relative abundance of individual metabolites, inbreeding populations responded similarly to outbreeding populations, suggesting adaptation to the outdoor environment, regardless of mating system.We conclude that low genetic diversity in naturally inbred populations may not compromise fitness or short-term capacity for appropriate physiological responses to environmental change. The absence of natural costs of inbreeding could help to explain the global success of clonal or asexual mating strategies for adapting to a wide range of environments.

Landscape conservation and maternal environment affect genetic diversity and the physiological responses of Euterpe edulis (Arecaceae) progenies to light availability

2021 ◽  
pp. 104722
Author(s):  
Amanda Freitas Cerqueira ◽  
Alesandro Souza Santos ◽  
Caio de Oliveira Alencar ◽  
Gabriel Santos de Oliveira ◽  
Catriane Sousa Santos ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Physiological Responses ◽  
Light Availability ◽  
Landscape Conservation ◽  
Maternal Environment ◽  
Euterpe Edulis

Misophonia: An Evidence-Based Case Report

2020 ◽  
Vol 29 (4) ◽  
pp. 685-690
Author(s):  
C. S. Vanaja ◽  
Miriam Soni Abigail
Keyword(s):  
Quality Of Life ◽  
Case Report ◽  
Case History ◽  
Pure Tone ◽  
Physiological Responses ◽  
Evidence Based ◽  
Management Option ◽  
Pure Tone Audiogram

Purpose Misophonia is a sound tolerance disorder condition in certain sounds that trigger intense emotional or physiological responses. While some persons may experience misophonia, a few patients suffer from misophonia. However, there is a dearth of literature on audiological assessment and management of persons with misophonia. The purpose of this report is to discuss the assessment of misophonia and highlight the management option that helped a patient with misophonia. Method A case study of a 26-year-old woman with the complaint of decreased tolerance to specific sounds affecting quality of life is reported. Audiological assessment differentiated misophonia from hyperacusis. Management included retraining counseling as well as desensitization and habituation therapy based on the principles described by P. J. Jastreboff and Jastreboff (2014). A misophonia questionnaire was administered at regular intervals to monitor the effectiveness of therapy. Results A detailed case history and audiological evaluations including pure-tone audiogram and Johnson Hyperacusis Index revealed the presence of misophonia. The patient benefitted from intervention, and the scores of the misophonia questionnaire indicated a decrease in the severity of the problem. Conclusions It is important to differentially diagnose misophonia and hyperacusis in persons with sound tolerance disorders. Retraining counseling as well as desensitization and habituation therapy can help patients who suffer from misophonia.

Physiological Responses of Spider Phobics and Nonphobics to Viewing Slides

2002 ◽  
Author(s):  
Rebecca L. Stump ◽  
Judith C. Conger ◽  
Scott Vrana
Keyword(s):  
Physiological Responses

Vasopressin and Telemetered Physiological Responses

1992 ◽  
Author(s):  
Helen M. Murphy ◽  
Cyrilla H. Wideman
Keyword(s):  
Physiological Responses
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