期刊
PLANT SCIENCE
卷 261, 期 -, 页码 60-68出版社
ELSEVIER IRELAND LTD
DOI: 10.1016/j.plantsci.2017.04.014
关键词
Climate change; In situ conservation; Potato wild relatives
资金
- Ministerio de Ciencia y Tecnologia de Argentina [PICT 2014-689, PICT 2012-0293]
- Agencia Nacional de Promocion Cientifica y Tecnologica (ANPCyT)
Climate change could lead to an upward shift in plant distribution, exposing populations to higher levels of ultraviolet (UV)-B radiation. In the framework of an in situ strategy for conserving potato wild relatives, we evaluated the effect of high UV-B levels on natural population of Solanum kurtzianum. The hypothesis is that plants from naturally higher altitudes are more adapted to increased UV-B radiation. Two populations from low and high altitudes were field supplemented using UV-B-lamps (+ UV-B) or excluded from it with plastic filters. Additionally, to assess in which extent the plant responses to these artificial experimental conditions are reproducible in natural conditions, three genotypes were cultivated in two mountain experimental gardens (EG) at different elevations. + UV-B treatment induced changes in leaf morphology and increases in phenolic compounds in both populations, indicating plant adaptation, since chlorophylls and reproductive structures were not negatively affected. These results indicate that this environmental factor may not limit the displacement of populations towards sites with higher UV-B levels. Meanwhile, in higher-altitude EG a tubers yield reduction, mainly through a decreased tuber number and a bigger accumulation of phenolic compounds than in + UV-B treatment were observed, suggesting that UV-B is not the only factor involved in plants adaptation to high altitude environments.
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