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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	Phenology and polyploidy in annual Brachypodium species (Poaceae) along the aridity gradient in Israel
	Penner Shira; Dror Barak; Avίezer Iris; Bar-Lev Yamit; Salman-Minkov Ayelet; Mandakova Terezie; Smarda Petr; Mayrose Itay; Sapir Yuval
来源期刊	Journal of Systematics and Evolution
ISSN	1674-4918
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 ~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
收录类别	CSCD
WOS研究方向	Life Sciences & Biomedicine - Other Topics
CSCD记录号	CSCD:6668143
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/336258
作者单位	Penner Shira, Tel Aviv University Botanical Garden,Tel Aviv University;;School of Plant Sciences and Food Security,Tel Aviv University, ;;, Tel Aviv;;Tel Aviv, Israel;;Israel 69978;;69978.; Dror Barak, Tel Aviv University Botanical Garden,Tel Aviv University;;School of Plant Sciences and Food Security,Tel Aviv University, ;;, Tel Aviv;;Tel Aviv, Israel;;Israel 69978;;69978.; Avίezer Iris, Tel Aviv University Botanical Garden,Tel Aviv University;;School of Plant Sciences and Food Security,Tel Aviv University, ;;, Tel Aviv;;Tel Aviv, Israel;;Israel 69978;;69978.; Bar-Lev Yamit, Tel Aviv University Botanical Garden,Tel Aviv University;;School of Plant Sciences and Food Security,Tel Aviv University, ;;, Tel Aviv;;Tel Aviv, Israel;;Israel 69978;;69978.; Sapir Yuval, Tel Aviv University Botanical Garden,Tel Aviv University;;School of Plant Sciences and Food Security,Tel Aviv University, ;;, Tel Aviv;;Tel Aviv, Israel;;Israel 69978;;69978.; Salman-Minkov Ayelet, School of Plant Sciences and Food Security,Tel Avi...
推荐引用方式 GB/T 7714	Penner Shira,Dror Barak,Avίezer 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.,Avίezer 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.