Constituents of a mixed-ploidy population of Solidago altissima differ in plasticity and predicted response to selection under simulated climate change

Katharine J. Zlonis, Julie R Etterson

Research output: Contribution to journalArticle

Abstract

Premise of the Study: Polyploids possess unique attributes that influence their environmental tolerance and geographic distribution. It is often unknown, however, whether cytotypes within mixed-ploidy populations are also uniquely adapted and differ in their responses to environmental change. Here, we examine whether diploids and hexaploids from a single mixed-ploidy population of Solidago altissima differ in plasticity and potential response to natural selection under conditions simulating climate change. Methods: Clonal replicates of diploid and hexaploid genotypes were grown in a randomized split-plot design under two temperature (+1.9°C) and two watering treatments (–13% soil moisture) implemented with open-top passive chambers placed under rainout shelters. Physiological, phenological, morphological traits, and a fitness correlate, reproductive biomass, were measured and compared among treatments. Key Results: Differences in traits suggest that diploids are currently better adapted to low- water availability than hexaploids. Both ploidy levels had adaptive plastic responses to treatments and are predicted to respond to selection, but often for different traits. Water availability generally had a stronger effect than temperature, but for some traits the effect of water depended on temperature. Conclusions: Diploid and hexaploid S. altissima may maintain fitness in the short term through adaptive plasticity and evolution depending on which traits are important in a warmer, drier environment. Hexaploids may be at a disadvantage compared to diploids because fewer traits were heritable. Our results underscore the importance of studying combinations of climate variables that are predicted to change simultaneously.

Original languageEnglish (US)
Pages (from-to)453-468
Number of pages16
JournalAmerican journal of botany
Volume106
Issue number3
DOIs
StatePublished - Mar 1 2019

Fingerprint

Solidago
ploidy
Ploidies
Climate Change
hexaploidy
Diploidy
plasticity
diploidy
climate change
water availability
fitness
Population
Temperature
Water
natural selection
temperature effect
shelter
Genetic Fitness
environmental change
genotype

Keywords

  • Asteraceae
  • climate change
  • elevated temperature
  • heritability
  • natural selection
  • plasticity
  • polyploidy

PubMed: MeSH publication types

  • Journal Article

Cite this

@article{a6f9187a47eb4ec68c01023db4c44dcd,
title = "Constituents of a mixed-ploidy population of Solidago altissima differ in plasticity and predicted response to selection under simulated climate change",
abstract = "Premise of the Study: Polyploids possess unique attributes that influence their environmental tolerance and geographic distribution. It is often unknown, however, whether cytotypes within mixed-ploidy populations are also uniquely adapted and differ in their responses to environmental change. Here, we examine whether diploids and hexaploids from a single mixed-ploidy population of Solidago altissima differ in plasticity and potential response to natural selection under conditions simulating climate change. Methods: Clonal replicates of diploid and hexaploid genotypes were grown in a randomized split-plot design under two temperature (+1.9°C) and two watering treatments (–13{\%} soil moisture) implemented with open-top passive chambers placed under rainout shelters. Physiological, phenological, morphological traits, and a fitness correlate, reproductive biomass, were measured and compared among treatments. Key Results: Differences in traits suggest that diploids are currently better adapted to low- water availability than hexaploids. Both ploidy levels had adaptive plastic responses to treatments and are predicted to respond to selection, but often for different traits. Water availability generally had a stronger effect than temperature, but for some traits the effect of water depended on temperature. Conclusions: Diploid and hexaploid S. altissima may maintain fitness in the short term through adaptive plasticity and evolution depending on which traits are important in a warmer, drier environment. Hexaploids may be at a disadvantage compared to diploids because fewer traits were heritable. Our results underscore the importance of studying combinations of climate variables that are predicted to change simultaneously.",
keywords = "Asteraceae, climate change, elevated temperature, heritability, natural selection, plasticity, polyploidy",
author = "Zlonis, {Katharine J.} and Etterson, {Julie R}",
year = "2019",
month = "3",
day = "1",
doi = "10.1002/ajb2.1257",
language = "English (US)",
volume = "106",
pages = "453--468",
journal = "American Journal of Botany",
issn = "0002-9122",
publisher = "Botanical Society of America Inc.",
number = "3",

}

TY - JOUR

T1 - Constituents of a mixed-ploidy population of Solidago altissima differ in plasticity and predicted response to selection under simulated climate change

AU - Zlonis, Katharine J.

AU - Etterson, Julie R

PY - 2019/3/1

Y1 - 2019/3/1

N2 - Premise of the Study: Polyploids possess unique attributes that influence their environmental tolerance and geographic distribution. It is often unknown, however, whether cytotypes within mixed-ploidy populations are also uniquely adapted and differ in their responses to environmental change. Here, we examine whether diploids and hexaploids from a single mixed-ploidy population of Solidago altissima differ in plasticity and potential response to natural selection under conditions simulating climate change. Methods: Clonal replicates of diploid and hexaploid genotypes were grown in a randomized split-plot design under two temperature (+1.9°C) and two watering treatments (–13% soil moisture) implemented with open-top passive chambers placed under rainout shelters. Physiological, phenological, morphological traits, and a fitness correlate, reproductive biomass, were measured and compared among treatments. Key Results: Differences in traits suggest that diploids are currently better adapted to low- water availability than hexaploids. Both ploidy levels had adaptive plastic responses to treatments and are predicted to respond to selection, but often for different traits. Water availability generally had a stronger effect than temperature, but for some traits the effect of water depended on temperature. Conclusions: Diploid and hexaploid S. altissima may maintain fitness in the short term through adaptive plasticity and evolution depending on which traits are important in a warmer, drier environment. Hexaploids may be at a disadvantage compared to diploids because fewer traits were heritable. Our results underscore the importance of studying combinations of climate variables that are predicted to change simultaneously.

AB - Premise of the Study: Polyploids possess unique attributes that influence their environmental tolerance and geographic distribution. It is often unknown, however, whether cytotypes within mixed-ploidy populations are also uniquely adapted and differ in their responses to environmental change. Here, we examine whether diploids and hexaploids from a single mixed-ploidy population of Solidago altissima differ in plasticity and potential response to natural selection under conditions simulating climate change. Methods: Clonal replicates of diploid and hexaploid genotypes were grown in a randomized split-plot design under two temperature (+1.9°C) and two watering treatments (–13% soil moisture) implemented with open-top passive chambers placed under rainout shelters. Physiological, phenological, morphological traits, and a fitness correlate, reproductive biomass, were measured and compared among treatments. Key Results: Differences in traits suggest that diploids are currently better adapted to low- water availability than hexaploids. Both ploidy levels had adaptive plastic responses to treatments and are predicted to respond to selection, but often for different traits. Water availability generally had a stronger effect than temperature, but for some traits the effect of water depended on temperature. Conclusions: Diploid and hexaploid S. altissima may maintain fitness in the short term through adaptive plasticity and evolution depending on which traits are important in a warmer, drier environment. Hexaploids may be at a disadvantage compared to diploids because fewer traits were heritable. Our results underscore the importance of studying combinations of climate variables that are predicted to change simultaneously.

KW - Asteraceae

KW - climate change

KW - elevated temperature

KW - heritability

KW - natural selection

KW - plasticity

KW - polyploidy

UR - http://www.scopus.com/inward/record.url?scp=85063276354&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85063276354&partnerID=8YFLogxK

U2 - 10.1002/ajb2.1257

DO - 10.1002/ajb2.1257

M3 - Article

VL - 106

SP - 453

EP - 468

JO - American Journal of Botany

JF - American Journal of Botany

SN - 0002-9122

IS - 3

ER -