Arid
DOI10.1111/pce.13198
Is desiccation tolerance and avoidance reflected in xylem and phloem anatomy of two coexisting arid-zone coniferous trees?
Sevanto, Sanna1; Ryan, Max1; Dickman, L. Turin1; Derome, Dominique2; Patera, Alessandra3,4; Defraeye, Thijs2,5; Pangle, Robert E.6; Hudson, Patrick J.6; Pockman, William T.6
通讯作者Sevanto, Sanna
来源期刊PLANT CELL AND ENVIRONMENT
ISSN0140-7791
EISSN1365-3040
出版年2018
卷号41期号:7页码:1551-1564
英文摘要

Plants close their stomata during drought to avoid excessive water loss, but species differ in respect to the drought severity at which stomata close. The stomatal closure point is related to xylem anatomy and vulnerability to embolism, but it also has implications for phloem transport and possibly phloem anatomy to allow sugar transport at low water potentials. Desiccation-tolerant plants that close their stomata at severe drought should have smaller xylem conduits and/or fewer and smaller interconduit pits to reduce vulnerability to embolism but more phloem tissue and larger phloem conduits compared with plants that avoid desiccation. These anatomical differences could be expected to increase in response to long-term reduction in precipitation. To test these hypotheses, we used tridimensional synchroton X-ray microtomograph and light microscope imaging of combined xylem and phloem tissues of 2 coniferous species: one-seed juniper (Juniperus monosperma) and pinon pine (Pinus edulis) subjected to precipitation manipulation treatments. These species show different xylem vulnerability to embolism, contrasting desiccation tolerance, and stomatal closure points. Our results support the hypothesis that desiccation tolerant plants require higher phloem transport capacity than desiccation avoiding plants, but this can be gained through various anatomical adaptations in addition to changing conduit or tissue size.


英文关键词conduit size interconduit pit phloem transport stomatal closure point synchrotron X-ray microtomography xylem vulnerability
类型Article
语种英语
国家USA ; Switzerland
收录类别SCI-E
WOS记录号WOS:000435808900007
WOS关键词PINYON-JUNIPER WOODLAND ; STRESS-INDUCED CAVITATION ; PIT MEMBRANE POROSITY ; EFFICIENCY TRADE-OFF ; LEAF GAS-EXCHANGE ; HYDRAULIC CONDUCTANCE ; STOMATAL CONTROL ; EXPERIMENTAL DROUGHT ; VASCULAR PLANTS ; WATER TRANSPORT
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/2XILL650/212179
作者单位1.Los Alamos Natl Lab, Earth & Environm Sci Div, Bikini Atoll Rd MS J535, Los Alamos, NM 87545 USA;
2.Swiss Fed Labs Mat Sci & Technol Empa, Lab Multiscale Studies Bldg Phys, Ueberlandstr 129, CH-8600 Dubendorf, Switzerland;
3.Paul Scherrer Inst, Swiss Light Source, CH-5232 Villigen, Switzerland;
4.Ecole Polytech Fed Lausanne, Ctr Imagerie BioMed, CH-1015 Lausanne, Switzerland;
5.Swiss Fed Inst Technol, Chair Bldg Phys, Stefano Franscini Pl 5, CH-8093 Zurich, Switzerland;
6.Univ New Mexico, Dept Biol, Castetter Hall 1480,Yale Blvd NE, Albuquerque, NM 87131 USA
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GB/T 7714
Sevanto, Sanna,Ryan, Max,Dickman, L. Turin,et al. Is desiccation tolerance and avoidance reflected in xylem and phloem anatomy of two coexisting arid-zone coniferous trees?[J],2018,41(7):1551-1564.
APA Sevanto, Sanna.,Ryan, Max.,Dickman, L. Turin.,Derome, Dominique.,Patera, Alessandra.,...&Pockman, William T..(2018).Is desiccation tolerance and avoidance reflected in xylem and phloem anatomy of two coexisting arid-zone coniferous trees?.PLANT CELL AND ENVIRONMENT,41(7),1551-1564.
MLA Sevanto, Sanna,et al."Is desiccation tolerance and avoidance reflected in xylem and phloem anatomy of two coexisting arid-zone coniferous trees?".PLANT CELL AND ENVIRONMENT 41.7(2018):1551-1564.
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