干旱区生态环境知识资源中心(Arid): Phenology and polyploidy in annual Brachypodium species (Poaceae) along the aridity gradient in Israel

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DOI	10.1111/jse.12489
	Phenology and polyploidy in annual Brachypodium species (Poaceae) along the aridity gradient in Israel
	Penner, Shira 1,2; Dror, Barak 1,2; Aviezer, Iris 1,2; Bar-Lev, Yamit 1,2; Salman-Minkov, Ayelet 2; Mandakova, Terezie 3; Smarda, Petr 4; Mayrose, Itay 2; Sapir, Yuval 1,2
通讯作者	Sapir, Yuval
来源期刊	JOURNAL OF SYSTEMATICS AND EVOLUTION
ISSN	1674-4918
EISSN	1759-6831
出版年	2020
卷号	58 期号:2 页码:189-199
英文摘要	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 similar to 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.
英文关键词	abiotic stress adaptation Brachypodium climatic gradient polyploidy
类型	Article
语种	英语
国家	Israel ; Czech Republic
收录类别	SCI-E
WOS记录号	WOS:000517676600008
WOS关键词	CLIMATE-CHANGE ; ANNUAL PLANT ; GERMINATION BEHAVIOR ; DROUGHT TOLERANCE ; DESERT ANNUALS ; FLOWERING TIME ; EVOLUTIONARY ; DISTACHYON ; POPULATIONS ; DIFFERENTIATION
WOS类目	Plant Sciences
WOS研究方向	Plant Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/315089
作者单位	1.Tel Aviv Univ, Aviv Univ Bot Garden, Ramat Aviv, Tel Aviv, Israel; 2.Tel Aviv Univ, Sch Plant Sciences, Food Secur, Ramat Aviv, Tel Aviv, Israel; 3.Masaryk Univ, Cent European Inst Technol, Fac Sci, CEITEC, Brno CZ-CZ-62500, Czech Republic; 4.Masaryk Univ, Dept Bot, Zoology, Brno CZ-CZ-61137, Czech Republic
推荐引用方式 GB/T 7714	Penner, Shira,Dror, Barak,Aviezer, Iris,et al. Phenology and polyploidy in annual Brachypodium species (Poaceae) along the aridity gradient in Israel[J],2020,58(2):189-199.
APA	Penner, Shira.,Dror, Barak.,Aviezer, Iris.,Bar-Lev, Yamit.,Salman-Minkov, Ayelet.,...&Sapir, Yuval.(2020).Phenology and polyploidy in annual Brachypodium species (Poaceae) along the aridity gradient in Israel.JOURNAL OF SYSTEMATICS AND EVOLUTION,58(2),189-199.
MLA	Penner, Shira,et al."Phenology and polyploidy in annual Brachypodium species (Poaceae) along the aridity gradient in Israel".JOURNAL OF SYSTEMATICS AND EVOLUTION 58.2(2020):189-199.