2022
Hernández-Madrigal, Fátima; Contreras-Negrete, Gonzalo; Aguilar-Romero, Rafael; Pineda-García, Fernando; González-Rodríguez, Antonio
DIFFERENTIATION IN SEED MASS AND SEEDLING BIOMASS ALLOCATION IN PROSOPIS LAEVIGATA THROUGHOUT ITS DISTRIBUTION RANGE IN MEXICO IS ASSOCIATED TO WATER AVAILABILITY Artículo de revista
En: Botanical Sciences, vol. 100, iss. 2, pp. 274-290, 2022, ISSN: 20074476.
Resumen | Enlaces | Etiquetas: actual evapotranspiration, arid zones, Functional traits, germination
@article{nokey,
title = {DIFFERENTIATION IN SEED MASS AND SEEDLING BIOMASS ALLOCATION IN PROSOPIS LAEVIGATA THROUGHOUT ITS DISTRIBUTION RANGE IN MEXICO IS ASSOCIATED TO WATER AVAILABILITY},
author = {Fátima Hernández-Madrigal and Gonzalo Contreras-Negrete and Rafael Aguilar-Romero and Fernando Pineda-García and Antonio González-Rodríguez},
doi = {10.17129/botsci.2846},
issn = {20074476},
year = {2022},
date = {2022-01-01},
journal = {Botanical Sciences},
volume = {100},
issue = {2},
pages = {274-290},
publisher = {Sociedad Botanica de Mexico, A.C},
abstract = {Background: Seedling establishment depends on the quality of the seeds and environmental conditions. Differential biomass allocation in emergent seedlings probably constitutes a relevant adaptive response of populations along environmental gradients. Questions: Are there differences in seed mass and biomass allocation in seedlings among Prosopis laevigata populations? Is this variation correlated with environmental variables? Studied species: Prosopis laevigata (Humb. & Bonpl. ex Willd.) M.C.Johnst (Fabaceae). Study site and dates: Thirteen localities along the distribution of P. laevigata in México. From 2016 to 2020. Methods: Seeds were collected from four or five mother trees per locality. Seed mass (SM) was obtained in ten seeds per mother and six functional traits indicative of biomass allocation were measured in the seedlings after 10 days of germination. Population mean values were obtained for the six traits plus SM and subjected to a principal component analysis (PCA). Population scores on the first two axis of the PCA were regressed against environmental variables from the collection localities using a stepwise regression model. Results: Populations displayed functional variation congruent with alternative biomass allocation strategies. The conservative strategy was characterized by larger seeds and seedlings with denser tissues and a higher investment in root biomass, while the opposite characterized the acquisitive strategy. Actual evapotranspiration in May, isothermality and soil water content in February were environmental variables that significantly predicted population scores on the first two axes of the PCA. Conclusion: Water availability gradients influence seed mass and seedling biomass allocation variation among P. laevigata populations.},
keywords = {actual evapotranspiration, arid zones, Functional traits, germination},
pubstate = {published},
tppubtype = {article}
}
Background: Seedling establishment depends on the quality of the seeds and environmental conditions. Differential biomass allocation in emergent seedlings probably constitutes a relevant adaptive response of populations along environmental gradients. Questions: Are there differences in seed mass and biomass allocation in seedlings among Prosopis laevigata populations? Is this variation correlated with environmental variables? Studied species: Prosopis laevigata (Humb. & Bonpl. ex Willd.) M.C.Johnst (Fabaceae). Study site and dates: Thirteen localities along the distribution of P. laevigata in México. From 2016 to 2020. Methods: Seeds were collected from four or five mother trees per locality. Seed mass (SM) was obtained in ten seeds per mother and six functional traits indicative of biomass allocation were measured in the seedlings after 10 days of germination. Population mean values were obtained for the six traits plus SM and subjected to a principal component analysis (PCA). Population scores on the first two axis of the PCA were regressed against environmental variables from the collection localities using a stepwise regression model. Results: Populations displayed functional variation congruent with alternative biomass allocation strategies. The conservative strategy was characterized by larger seeds and seedlings with denser tissues and a higher investment in root biomass, while the opposite characterized the acquisitive strategy. Actual evapotranspiration in May, isothermality and soil water content in February were environmental variables that significantly predicted population scores on the first two axes of the PCA. Conclusion: Water availability gradients influence seed mass and seedling biomass allocation variation among P. laevigata populations.
2021
Contreras-Negrete, Gonzalo; Letelier, Luis; Piña-Torres, Javier; González-Rodríguez, Antonio
Genetic structure, phylogeography and potential distribution modeling suggest a population expansion in the mesquite Prosopis laevigata since the last interglacial Artículo de revista
En: Plant Systematics and Evolution, vol. 307, iss. 2, 2021, ISSN: 16156110.
Resumen | Enlaces | Etiquetas: arid zones, Phylogeography, Population expansion, Population genetics, Prosopis
@article{nokey,
title = {Genetic structure, phylogeography and potential distribution modeling suggest a population expansion in the mesquite Prosopis laevigata since the last interglacial},
author = {Gonzalo Contreras-Negrete and Luis Letelier and Javier Piña-Torres and Antonio González-Rodríguez},
doi = {10.1007/s00606-021-01744-5},
issn = {16156110},
year = {2021},
date = {2021-01-01},
journal = {Plant Systematics and Evolution},
volume = {307},
issue = {2},
publisher = {Springer},
abstract = {Patterns of genetic and phylogeographic structure and recent population history of plant species in the Mexican arid zones have been scarcely investigated. Prosopis laevigata is the most widely spread species of mesquite in Mexico, with extensive populations in the arid and semiarid zones of the central and northern plateaus and scattered presence in southern Mexico. We evaluated the genetic and phylogeographic structure of this species to infer its recent demographic history. We genotyped six nuclear microsatellite loci and sequenced the psbA3´-trnH chloroplast DNA (cpDNA) region in individuals from 21 populations covering the whole distribution of the species. Nuclear genetic diversity was moderately high (HE = 0.527), and genetic differentiation was moderate (FST = 0.16). A positive correlation between genetic diversity and latitude was observed. The cpDNA analyses indicated a lack of phylogeographic structure in P. laevigata (GST = 0.090},
keywords = {arid zones, Phylogeography, Population expansion, Population genetics, Prosopis},
pubstate = {published},
tppubtype = {article}
}
Patterns of genetic and phylogeographic structure and recent population history of plant species in the Mexican arid zones have been scarcely investigated. Prosopis laevigata is the most widely spread species of mesquite in Mexico, with extensive populations in the arid and semiarid zones of the central and northern plateaus and scattered presence in southern Mexico. We evaluated the genetic and phylogeographic structure of this species to infer its recent demographic history. We genotyped six nuclear microsatellite loci and sequenced the psbA3´-trnH chloroplast DNA (cpDNA) region in individuals from 21 populations covering the whole distribution of the species. Nuclear genetic diversity was moderately high (HE = 0.527), and genetic differentiation was moderate (FST = 0.16). A positive correlation between genetic diversity and latitude was observed. The cpDNA analyses indicated a lack of phylogeographic structure in P. laevigata (GST = 0.090
Contreras-Negrete, Gonzalo; Pineda-García, Fernando; Nicasio-Arzeta, Sergio; Barrera, Erick De; González-Rodríguez, Antonio
Differences in germination response to temperature, salinity, and water potential among Prosopis laevigata populations are guided by the tolerance-exploitation trade-off. Artículo de revista
En: Flora: Morphology, Distribution, Functional Ecology of Plants, vol. 285, 2021, ISSN: 03672530.
Resumen | Enlaces | Etiquetas: arid zones, Cardinal temperatures, Environmental gradients, Hydrotime, Local adaptation, Mesquite, Thermal time
@article{nokey,
title = {Differences in germination response to temperature, salinity, and water potential among Prosopis laevigata populations are guided by the tolerance-exploitation trade-off.},
author = {Gonzalo Contreras-Negrete and Fernando Pineda-García and Sergio Nicasio-Arzeta and Erick De Barrera and Antonio González-Rodríguez},
doi = {10.1016/j.flora.2021.151963},
issn = {03672530},
year = {2021},
date = {2021-01-01},
journal = {Flora: Morphology, Distribution, Functional Ecology of Plants},
volume = {285},
publisher = {Elsevier GmbH},
abstract = {Exploring the mechanisms that promote population divergence represents a central point in evolutionary ecology. Along their distribution, species commonly experience contrasting environmental conditions, which impose local selection pressures to which populations tend to adapt resulting, for example, in ways to deal with resource shortage or abundance. In this study, we explored if germination performance varies under different levels of temperature, water potential and salinity among populations of Prosopis laevigata, a widespread mesquite species from the arid and semi-arid zones of Mexico. Given the wide distribution of P. laevigata and the sensitivity of the germination phase to environmental conditions, we hypothesized the existence of differential responses during this crucial stage of plant development. Thus, we expected germination in populations of P. laevigata from more arid zones to be less sensitive to high temperatures, salinity, and water deficit. Also, we explored if the exploitation–tolerance trade-off guides the differentiation of P. laevigata populations in germination performance under varying conditions. Germination of all populations was very sensitive to water scarcity but not to variation in temperature or salinity. We identified two major axes of trait covariation in germination physiology: one defined by tolerance of germination to water and saline stress versus germination velocity, and the other defined by the tolerance to extreme temperatures. We found evidence that variation in tolerance among the populations was related with their distribution along environmental gradients. Overall, populations with a higher capacity to germinate under water deficit stress, salinity, and extreme temperatures inhabit warmer and more saline areas. Our study provides strong evidence of existing local adaptations during germination of P. laevigata from across its distribution in the arid lands of Mexico.},
keywords = {arid zones, Cardinal temperatures, Environmental gradients, Hydrotime, Local adaptation, Mesquite, Thermal time},
pubstate = {published},
tppubtype = {article}
}
Exploring the mechanisms that promote population divergence represents a central point in evolutionary ecology. Along their distribution, species commonly experience contrasting environmental conditions, which impose local selection pressures to which populations tend to adapt resulting, for example, in ways to deal with resource shortage or abundance. In this study, we explored if germination performance varies under different levels of temperature, water potential and salinity among populations of Prosopis laevigata, a widespread mesquite species from the arid and semi-arid zones of Mexico. Given the wide distribution of P. laevigata and the sensitivity of the germination phase to environmental conditions, we hypothesized the existence of differential responses during this crucial stage of plant development. Thus, we expected germination in populations of P. laevigata from more arid zones to be less sensitive to high temperatures, salinity, and water deficit. Also, we explored if the exploitation–tolerance trade-off guides the differentiation of P. laevigata populations in germination performance under varying conditions. Germination of all populations was very sensitive to water scarcity but not to variation in temperature or salinity. We identified two major axes of trait covariation in germination physiology: one defined by tolerance of germination to water and saline stress versus germination velocity, and the other defined by the tolerance to extreme temperatures. We found evidence that variation in tolerance among the populations was related with their distribution along environmental gradients. Overall, populations with a higher capacity to germinate under water deficit stress, salinity, and extreme temperatures inhabit warmer and more saline areas. Our study provides strong evidence of existing local adaptations during germination of P. laevigata from across its distribution in the arid lands of Mexico.
Contreras-Negrete, Gonzalo; Letelier, Luis; Piña-Torres, Javier; González-Rodríguez, Antonio
Genetic structure, phylogeography and potential distribution modeling suggest a population expansion in the mesquite Prosopis laevigata since the last interglacial Artículo de revista
En: Plant Systematics and Evolution, vol. 307, iss. 2, 2021, ISSN: 16156110.
Resumen | Enlaces | Etiquetas: arid zones, Phylogeography, Population expansion, Population genetics, Prosopis
@article{nokey,
title = {Genetic structure, phylogeography and potential distribution modeling suggest a population expansion in the mesquite Prosopis laevigata since the last interglacial},
author = {Gonzalo Contreras-Negrete and Luis Letelier and Javier Piña-Torres and Antonio González-Rodríguez},
doi = {10.1007/s00606-021-01744-5},
issn = {16156110},
year = {2021},
date = {2021-01-01},
journal = {Plant Systematics and Evolution},
volume = {307},
issue = {2},
publisher = {Springer},
abstract = {Patterns of genetic and phylogeographic structure and recent population history of plant species in the Mexican arid zones have been scarcely investigated. Prosopis laevigata is the most widely spread species of mesquite in Mexico, with extensive populations in the arid and semiarid zones of the central and northern plateaus and scattered presence in southern Mexico. We evaluated the genetic and phylogeographic structure of this species to infer its recent demographic history. We genotyped six nuclear microsatellite loci and sequenced the psbA3´-trnH chloroplast DNA (cpDNA) region in individuals from 21 populations covering the whole distribution of the species. Nuclear genetic diversity was moderately high (HE = 0.527), and genetic differentiation was moderate (FST = 0.16). A positive correlation between genetic diversity and latitude was observed. The cpDNA analyses indicated a lack of phylogeographic structure in P. laevigata (GST = 0.090},
keywords = {arid zones, Phylogeography, Population expansion, Population genetics, Prosopis},
pubstate = {published},
tppubtype = {article}
}
Patterns of genetic and phylogeographic structure and recent population history of plant species in the Mexican arid zones have been scarcely investigated. Prosopis laevigata is the most widely spread species of mesquite in Mexico, with extensive populations in the arid and semiarid zones of the central and northern plateaus and scattered presence in southern Mexico. We evaluated the genetic and phylogeographic structure of this species to infer its recent demographic history. We genotyped six nuclear microsatellite loci and sequenced the psbA3´-trnH chloroplast DNA (cpDNA) region in individuals from 21 populations covering the whole distribution of the species. Nuclear genetic diversity was moderately high (HE = 0.527), and genetic differentiation was moderate (FST = 0.16). A positive correlation between genetic diversity and latitude was observed. The cpDNA analyses indicated a lack of phylogeographic structure in P. laevigata (GST = 0.090