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@article{1536659, author = {Penner, Shira and Dror, Barak and Aviezer, Iris and BarandLev, Yamit and SalmanandMinkov, Ayelet and Mandáková, Terezie and Šmarda, Petr and Mayrose, Itay and Sapir, Yuval}, article_location = {Hoboken}, article_number = {2}, doi = {http://dx.doi.org/10.1111/jse.12489}, keywords = {abiotic stress; adaptation; Brachypodium; climatic gradient; polyploidy}, language = {eng}, issn = {1674-4918}, journal = {Journal of Systematics and Evolution}, title = {Phenology and polyploidy in annual Brachypodium species (Poaceae) along the aridity gradient in Israel}, url = {https://onlinelibrary.wiley.com/doi/full/10.1111/jse.12489}, volume = {58}, year = {2020} }
TY - JOUR ID - 1536659 AU - Penner, Shira - Dror, Barak - Aviezer, Iris - Bar-Lev, Yamit - Salman-Minkov, Ayelet - Mandáková, Terezie - Šmarda, Petr - Mayrose, Itay - Sapir, Yuval PY - 2020 TI - Phenology and polyploidy in annual Brachypodium species (Poaceae) along the aridity gradient in Israel JF - Journal of Systematics and Evolution VL - 58 IS - 2 SP - 189-199 EP - 189-199 PB - Wiley SN - 16744918 KW - abiotic stress KW - adaptation KW - Brachypodium KW - climatic gradient KW - polyploidy UR - https://onlinelibrary.wiley.com/doi/full/10.1111/jse.12489 L2 - https://onlinelibrary.wiley.com/doi/full/10.1111/jse.12489 N2 - Local adaptation of plants along environmental gradients provides strong evidence for clinal evolution mediated by natural selection. Plants have developed diverse strategies to mitigate stress, for example, drought escape is a phenological strategy to avoid drought stress, while polyploidy was proposed as a genomic adaptation to stress. Polyploidy as an adaptation to aridity (an environmental parameter integrating temperature and precipitation) was previously documented in annual Brachypodium spp. (Poaceae) in the Western Mediterranean. Here, we examined whether polyploidy or phenology are associated with aridity in annual Brachypodium spp. along the aridity gradient in the Eastern Mediterranean. Using flow cytometry, we determined ploidy levels of plants from natural populations along the Israeli gradient, spanning 424 km from mesic Mediterranean to extreme desert climates. In a common garden we recorded time of seedling emergence, flowering and senescence. We tested whether the proportion of allotetraploids in the populations and phenological traits were associated with aridity. Contrary to a previous study in the Western Mediterranean, we found no effect of aridity on the proportion of allotetraploids and diploids within populations. Interestingly, phenology was associated with aridity: time of emergence was later, while flowering and senescence were earlier in desert plants. Our results indicate that in the Eastern Mediterranean, adaptation of Brachypodium to aridity is mediated mainly by phenology, rather than ploidy level. Therefore, we suggest that genome duplication is not the main driver of adaptation to environmental stress; rather, phenological change as a drought escape mechanism may be the major adaptation. ER -
PENNER, Shira, Barak DROR, Iris AVIEZER, Yamit BAR-LEV, Ayelet SALMAN-MINKOV, Terezie MANDÁKOVÁ, Petr ŠMARDA, Itay MAYROSE a Yuval SAPIR. Phenology and polyploidy in annual Brachypodium species (Poaceae) along the aridity gradient in Israel. \textit{Journal of Systematics and Evolution}. Hoboken: Wiley, roč.~58, č.~2, s.~189-199. ISSN~1674-4918. doi:10.1111/jse.12489. 2020.
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