Сибирский федеральный университет

Тип публикации: статья из журнала

Год издания: 2018

Идентификатор DOI: 10.1016/j.foreco.2018.04.058

Ключевые слова: Adaptive responses, Aleppo pine, Genotype-by-environment interaction, Phenotypic plasticity, Mixed models, Stability analysis

Аннотация: The combined effects of local adaptation and phenotypic plasticity influencing plant performance are relevant to understand the capacity for genetic responses to climate change. Pima halepensis is a native species of low- to mid-elevation Mediterranean forests with a high ecological value in drought-prone areas. Thus, it is of utmost importance to determine its adaptive structure for key traits such as growth or survival. Here, we analyse a highly unbalanced dataset collated from different common-garden networks that cover the distribution range of the species. A total of 82 range-wide populations were evaluated in nine Mediterranean trials located in Israel, Italy and Spain. A climate classification of populations allowed for the definition of six different groups, or ecotypes, which showed contrasting performances for tree height and survival at age 15. The effects of ecotypic differentiation and among-ecotypes genetic variation in plasticity were disentangled by fitting stability models accounting for interaction and heteroscedasticity in genotype-by-environment tables. For growth, a Finlay-Wilkinson model suggested high predictability of ecotypic plastic responses in P. halepensis, as described by different linear reaction norms. However, differences in mean height of ca. 15% among ecotypes dominated infra-specific patterns of tree growth across trials, pointing to preponderance of genotypic adaptation over differential ecotypic plasticity in this species. For survival, ecotypic differences were approximately constant across trials, suggesting lack of genotype-by-environment effects. Sub-humid cool climate populations from the eastern Mediterranean (e.g., Greek populations) showed general adaptation and high sensitivity to improved growing conditions, as opposed to populations from the driest ecological extreme of the species (e.g., south Spain and Maghreb populations), which exhibited specific adaptation to harsh environments. Altogether, our results indicate a general adaptive syndrome by which less reactive ecotypes to ameliorated conditions (e.g., non-water-limited) would be associated with high survival rates and low growth. The reported ecotypic differentiation constitutes the basis for tailoring infra-specific responses to climate and disentangling the relationship between adaptive variation and resilience towards climatic warming for this exemplary Mediterranean pine.

Журнал: FOREST ECOLOGY AND MANAGEMENT

Выпуск журнала: Vol. 424

Номера страниц: 205-215

ISSN журнала: 03781127

Место издания: AMSTERDAM

Издатель: ELSEVIER SCIENCE BV

• Voltas Jordi (Univ Lleida, Dept Crop & Forest Sci, AGROTECNIO Ctr, Lleida 25198, Spain)
• Shestakova Tatiana A. (Univ Lleida, Dept Crop & Forest Sci, AGROTECNIO Ctr, Lleida 25198, Spain; Siberian Fed Univ, St L Prushinskoy 2, Krasnoyarsk 660075, Russia)
• Patsiou Theofania (Univ Basel, Inst Bot, Schonbeinstr 6, CH-4056 Basel, Switzerland)
• di Matteo Giovanni (Res Ctr Agr & Environm CREA, Council Agr Res & Econ, Rome, Italy)
• Klein Tamir (Weizmann Inst Sci, Dept Plant & Environm Sci, 234 Herzl St, IL-7610001 Rehovot, Israel)

• Web of Science Core Collection
• Scopus
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