干旱区生态环境知识资源中心(Arid): Unexpectedly low delta ~(13)C in leaves,branches,stems and roots of three acacia species growing in hyper-arid environments

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	Unexpectedly low delta ~(13)C in leaves,branches,stems and roots of three acacia species growing in hyper-arid environments
其他题名	生长在超干旱环境下的3种相思树种表现出异常低的叶片、树枝、树干、根中delta~(13)C含量
	Uni Daphna; Groner Elli; Soloway Elaine; Hjazin Amgad; Johnswick Spencer; Winters Gidon; Sheffer Efrat; Rog Ido; Wagner Yael; Klein Tamir
来源期刊	植物生态学报
ISSN	1752-9921
出版年	2021
卷号	14 期号:1 页码:1752-9921
中文摘要	在植物生理生态学中,叶片中碳13(~(13)C)含量负值较少(富集),表明叶片处于通过气孔的气体交换减少,比如在干旱胁迫下。此外,与叶片相比,~(13)C在非光合组织中的负值也较少。然而,对从叶片(光合器官)到树枝、树干和根(非光合器官)中的delta ~(13)C数值的关系知之甚少,特别是缺少在关联密切的多个树种间或者不同器官间,以及对生长在极端高温和干旱胁迫下的树木中进行测定。本研究测定了3种近缘沙漠相思树种(Acacia tortilis、A.raddiana和A.pachyceras)从叶片到根的~(13)C含量。我们在以色列南部成树的叶片组织中测定了delta ~(13)C含量。与此同时,在试验果园进行了为期7年的3个水平的灌溉试验。在试验结束时,测定了叶片、树枝、树干和根的生长参数和delta ~(13)C含量。研究结果表明,叶片组织中delta ~(13)C含量约为-27,其同位素贫化程度远超过生长在地球上最干燥和最热环境中的沙漠树种的预期值。在不同的相思树种和不同器官中,所有灌溉水平处理中的delta ~(13)C含量并没有富集(-28到ca.-27),证实了在成熟相思树中的测定结果。在不同器官中,叶片delta ~(13)C含量与树枝和根的delta ~(13)C含量异常相似,甚至比树干的delta ~(13)C含量负值更少。高度贫化的叶片delta ~(13)C表明,尽管这些树木生长在极端干燥的生境中,但其气孔气体交换较高。非光合组织中缺乏delta ~(13)C富集可能与叶片和异养组织生长的季节耦合有关。
英文摘要	Aims In plant eco-physiology,less negative(enriched)carbon 13(~(13)C)in the leaves indicates conditions of reducing leaf gas exchange through stomata,e.g.under drought.In addition,~(13)C is expected to be less negative in non-photosynthetic tissues as compared with leaves.However,these relationships in delta ~(13)C from leaves(photosynthetic organs)to branches,stems and roots(non-photosynthetic organs)are rarely tested across multiple closely related tree species,multiple compartments,or in trees growing under extreme heat and drought.Methods We measured leaf-to-root ~(13)C in three closely related desert acacia species(Acacia tortilis,A.raddiana and A.pachyceras).We measured delta ~(13)C in leaf tissues from mature trees in southern Israel.In parallel,a 7-year irrigation experiment with 0.5,1.0 or 4.0 L day-1 was conducted in an experimental orchard.At the end of the experiment,growth parameters and delta ~(13)C were measured in leaves,branches,stems and roots.Important Findings The delta ~(13)C in leaf tissues sampled from mature trees was ca.-27,far more depleted than expected from a desert tree growing in one of the Earth's driest and hottest environments.Across acacia species and compartments,delta ~(13)C was not enriched at all irrigation levels(-28 to ca.-27),confirming our measurements in the mature trees.Among compartments,leaf delta ~(13)C was unexpectedly similar to branch and root delta ~(13)C,and surprisingly,even less negative than stem delta ~(13)C.The highly depleted leaf delta ~(13)C suggests that these trees have high stomatal gas exchange,despite growing in extremely dry habitats.The lack of delta ~(13)C enrichment in nonphotosynthetic tissues might be related to the seasonal coupling of growth of leaves and heterotrophic tissues.
中文关键词	稳定性同位素 ; ~(13)C富集 ; 沙漠 ; 树木抗旱性 ; 相思树属
英文关键词	stable isotope delta ~(13)C enrichment desert tree drought resistance Acacia raddiana Acacia tortilis
类型	Article
语种	英语
国家	中国
收录类别	CSCD
WOS类目	Life Sciences & Biomedicine - Other Topics
CSCD记录号	CSCD:6932068
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/354538
作者单位	Uni Daphna, Department of Plant and Environmental Sciences, Weizmann Institute of Science;;The Dead Sea-Arava Science Center, Tamar Regional Council;;Institute of Plant Sciences and Genetic in Agriculture, The Robert H.Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, ;;;;, Rehovot;;Neve Zohar;;Rehovot, Israel;;Israel;;Israel ;;86910;;.; Groner Elli, The Dead Sea-Arava Science Center, Tamar Regional Council, Neve Zohar, 86910, Israel.; Winters Gidon, The Dead Sea-Arava Science Center, Tamar Regional Council, Neve Zohar, 86910, Israel.; Soloway Elaine, Arava Institute for Environmental Studies, Kibbutz Ketura, Israel.; Hjazin Amgad, Arava Institute for Environmental Studies, Kibbutz Ketura, Israel.; Johnswick Spencer, Arava Institute for Environmental Studies, Kibbutz Ketura, Israel.; Sheffer Efrat, Institute of Plant Sciences and Genetic in Agriculture, The Robert H.Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot, Israel...
推荐引用方式 GB/T 7714	Uni Daphna,Groner Elli,Soloway Elaine,et al. Unexpectedly low delta ~(13)C in leaves,branches,stems and roots of three acacia species growing in hyper-arid environments[J],2021,14(1):1752-9921.
APA	Uni Daphna.,Groner Elli.,Soloway Elaine.,Hjazin Amgad.,Johnswick Spencer.,...&Klein Tamir.(2021).Unexpectedly low delta ~(13)C in leaves,branches,stems and roots of three acacia species growing in hyper-arid environments.植物生态学报,14(1),1752-9921.
MLA	Uni Daphna,et al."Unexpectedly low delta ~(13)C in leaves,branches,stems and roots of three acacia species growing in hyper-arid environments".植物生态学报 14.1(2021):1752-9921.