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

Arid

DOI	10.1093/jpe/rtaa080
	Unexpectedly low delta C-13 in leaves, branches, stems and roots of three acacia species growing in hyper-arid environments
	Uni, Daphna; Groner, Elli; Soloway, Elaine; Hjazin, Amgad; Johnswick, Spencer; Winters, Gidon; Sheffer, Efrat; Rog, Ido; Wagner, Yael; Klein, Tamir
通讯作者	Klein, T (corresponding author), Weizmann Inst Sci, Dept Plant & Environm Sci, Rehovot, Israel.
来源期刊	JOURNAL OF PLANT ECOLOGY
ISSN	1752-9921
EISSN	1752-993X
出版年	2021
卷号	14 期号:1 页码:117-131
英文摘要	Aims In plant eco-physiology, less negative (enriched) carbon 13 (C-13) in the leaves indicates conditions of reducing leaf gas exchange through stomata, e.g. under drought. In addition, C-13 is expected to be less negative in non-photosynthetic tissues as compared with leaves. However, these relationships in delta C-13 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 C-13 in three closely related desert acacia species (Acacia tortilis, A. raddiana and A. pachyceras). We measured delta C-13 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 C-13 were measured in leaves, branches, stems and roots. Important Findings The delta C-13 in leaf tissues sampled from mature trees was ca. -27 parts per thousand, 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 C-13 was not enriched at all irrigation levels (-28 parts per thousand to ca. -27 parts per thousand), confirming our measurements in the mature trees. Among compartments, leaf delta C-13 was unexpectedly similar to branch and root delta C-13, and surprisingly, even less negative than stem delta C-13. The highly depleted leaf delta C-13 suggests that these trees have high stomatal gas exchange, despite growing in extremely dry habitats. The lack of delta C-13 enrichment in non-photosynthetic tissues might be related to the seasonal coupling of growth of leaves and heterotrophic tissues.
英文关键词	stable isotope delta C-13 enrichment desert tree drought resistance Acacia raddiana Acacia tortilis
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000637314300008
WOS关键词	CARBON-ISOTOPE COMPOSITION ; ORGANIC-MATTER ; TREE HEIGHT ; WATER-USE ; GROWTH ; NEGEV ; POPULATIONS ; TORTILIS ; PLANTS ; POOLS
WOS类目	Plant Sciences ; Ecology ; Forestry
WOS研究方向	Plant Sciences ; Environmental Sciences & Ecology ; Forestry
来源机构	Hebrew University of Jerusalem
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/350968
作者单位	[Uni, Daphna; Rog, Ido; Wagner, Yael; Klein, Tamir] Weizmann Inst Sci, Dept Plant & Environm Sci, Rehovot, Israel; [Uni, Daphna; Groner, Elli; Winters, Gidon] Tamar Reg Council, Dead Sea Arava Sci Ctr, IL-86910 Neve Zohar, Israel; [Uni, Daphna; Sheffer, Efrat] Hebrew Univ Jerusalem, Robert H Smith Fac Agr Food & Environm, Inst Plant Sci & Genet Agr, Rehovot, Israel; [Soloway, Elaine; Hjazin, Amgad; Johnswick, Spencer] Arava Inst Environm Studies, Kibbutz Ketura, Israel
推荐引用方式 GB/T 7714	Uni, Daphna,Groner, Elli,Soloway, Elaine,et al. Unexpectedly low delta C-13 in leaves, branches, stems and roots of three acacia species growing in hyper-arid environments[J]. Hebrew University of Jerusalem,2021,14(1):117-131.
APA	Uni, Daphna.,Groner, Elli.,Soloway, Elaine.,Hjazin, Amgad.,Johnswick, Spencer.,...&Klein, Tamir.(2021).Unexpectedly low delta C-13 in leaves, branches, stems and roots of three acacia species growing in hyper-arid environments.JOURNAL OF PLANT ECOLOGY,14(1),117-131.
MLA	Uni, Daphna,et al."Unexpectedly low delta C-13 in leaves, branches, stems and roots of three acacia species growing in hyper-arid environments".JOURNAL OF PLANT ECOLOGY 14.1(2021):117-131.