Genetic Variation of Drought Tolerance in Pinus pinaster at Three Hierarchical Levels: A Comparison of Induced Osmotic Stress and Field Testing
Open Access
- 1 November 2013
- journal article
- research article
- Published by Public Library of Science (PLoS) in PLOS ONE
- Vol. 8 (11), e79094
- https://doi.org/10.1371/journal.pone.0079094
Abstract
Understanding the survival capacity of forest trees to periods of severe water stress could improve knowledge of the adaptive potential of different species under future climatic scenarios. In long lived organisms, like forest trees, the combination of induced osmotic stress treatments and field testing can elucidate the role of drought tolerance during the early stages of establishment, the most critical in the life of the species. We performed a Polyethylene glycol-osmotic induced stress experiment and evaluated two common garden experiments (xeric and mesic sites) to test for survival and growth of a wide range clonal collection of Maritime pine. This study demonstrates the importance of additive vs non additive effects for drought tolerance traits in Pinus pinaster, and shows differences in parameters determining the adaptive trajectories of populations and family and clones within populations. The results show that osmotic adjustment plays an important role in population variation, while biomass allocation and hydric content greatly influence survival at population level. Survival in the induced osmotic stress experiment presented significant correlations with survival in the xeric site, and height growth at the mesic site, at population level, indicating constraints of adaptation for those traits, while at the within population level no significant correlation existed. These results demonstrate that population differentiation and within population genetic variation for drought tolerance follow different patterns.Keywords
This publication has 44 references indexed in Scilit:
- Potential for evolutionary responses to climate change – evidence from tree populationsGlobal Change Biology, 2013
- Uniform Selection as a Primary Force Reducing Population Genetic Differentiation of Cavitation Resistance across a Species RangePLOS ONE, 2011
- Forest tree genomics: growing resources and applicationsNature Reviews Genetics, 2011
- Climate change impacts, adaptive capacity, and vulnerability of European forest ecosystemsForest Ecology and Management, 2010
- Does selecting for improved growth affect wood quality of Pinus pinaster in Portugal?Forest Ecology and Management, 2009
- Variations in growth, survival and carbon isotope composition ( 13C) among Pinus pinaster populations of different geographic originsTree Physiology, 2008
- Ecological limits to plant phenotypic plasticityNew Phytologist, 2007
- Physiology and morphology of Pinus sylvestris seedlings from diverse sources under cyclic drought stressForest Ecology and Management, 2001
- Variabilité intraspécifique chez le pin maritime (Pinus pinaster Ait) dans le sud-est de la France. I. Variabilité des populations autochtones et des populations de l'ensemble de l'aire de l'espèceAnnals of Forest Science, 1995
- Nonparametric Estimation from Incomplete ObservationsJournal of the American Statistical Association, 1958