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Testing the large genome constraint hypothesis: plant traits, habitat and climate seasonality in Liliaceae.
New Phytol 2016; 210(2):709-16NP

Abstract

The factors driving genome size evolution in Liliaceae were examined. In particular, we investigated whether species with larger genomes are confined to less stressful environments with a longer vegetative season. We tested our hypotheses by correlating the genome size with other plant traits and environmental variables. To determine the adaptive nature of the genome size, we also compared the performances of Brownian motion (BM) processes with those inferred by Ornstein-Uhlenbeck (OU) models of trait evolution. A positive correlation of genome size with plant size, mean temperature and habitat moisture and a negative correlation with altitude and precipitation seasonality were found. Models of trait evolution revealed a deviation from a drift process or BM. Instead, changes in genome size were significantly associated with precipitation regimes according to an OU process. Specifically, the evolutionary optima towards which the genome size evolves were higher for humid climates and lower for drier ones. Taken together, our results indicate that the genome size increase in Liliaceae is constrained by climate seasonality.

Authors+Show Affiliations

Unit of Botany, Department of Biology, Università of Pisa, via Derna 1, Pisa, 56126, Italy.Unit of Botany, Department of Biology, Università of Pisa, via Derna 1, Pisa, 56126, Italy.

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

26595257

Citation

Carta, Angelino, and Lorenzo Peruzzi. "Testing the Large Genome Constraint Hypothesis: Plant Traits, Habitat and Climate Seasonality in Liliaceae." The New Phytologist, vol. 210, no. 2, 2016, pp. 709-16.
Carta A, Peruzzi L. Testing the large genome constraint hypothesis: plant traits, habitat and climate seasonality in Liliaceae. New Phytol. 2016;210(2):709-16.
Carta, A., & Peruzzi, L. (2016). Testing the large genome constraint hypothesis: plant traits, habitat and climate seasonality in Liliaceae. The New Phytologist, 210(2), pp. 709-16. doi:10.1111/nph.13769.
Carta A, Peruzzi L. Testing the Large Genome Constraint Hypothesis: Plant Traits, Habitat and Climate Seasonality in Liliaceae. New Phytol. 2016;210(2):709-16. PubMed PMID: 26595257.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Testing the large genome constraint hypothesis: plant traits, habitat and climate seasonality in Liliaceae. AU - Carta,Angelino, AU - Peruzzi,Lorenzo, Y1 - 2015/11/23/ PY - 2015/06/15/received PY - 2015/10/20/accepted PY - 2015/11/24/entrez PY - 2015/11/26/pubmed PY - 2016/12/15/medline KW - Liliaceae KW - genome size evolution KW - models of trait evolution KW - phylogenetic comparative analysis KW - plant-climate interactions SP - 709 EP - 16 JF - The New phytologist JO - New Phytol. VL - 210 IS - 2 N2 - The factors driving genome size evolution in Liliaceae were examined. In particular, we investigated whether species with larger genomes are confined to less stressful environments with a longer vegetative season. We tested our hypotheses by correlating the genome size with other plant traits and environmental variables. To determine the adaptive nature of the genome size, we also compared the performances of Brownian motion (BM) processes with those inferred by Ornstein-Uhlenbeck (OU) models of trait evolution. A positive correlation of genome size with plant size, mean temperature and habitat moisture and a negative correlation with altitude and precipitation seasonality were found. Models of trait evolution revealed a deviation from a drift process or BM. Instead, changes in genome size were significantly associated with precipitation regimes according to an OU process. Specifically, the evolutionary optima towards which the genome size evolves were higher for humid climates and lower for drier ones. Taken together, our results indicate that the genome size increase in Liliaceae is constrained by climate seasonality. SN - 1469-8137 UR - https://www.unboundmedicine.com/medline/citation/26595257/Testing_the_large_genome_constraint_hypothesis:_plant_traits_habitat_and_climate_seasonality_in_Liliaceae_ L2 - https://doi.org/10.1111/nph.13769 DB - PRIME DP - Unbound Medicine ER -