气候变化领域集成服务门户(CCPortal): New insights into wood anatomy and function relationships: How Eucalyptus challenges what we already know

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DOI	10.1016/j.foreco.2019.117638
	New insights into wood anatomy and function relationships: How Eucalyptus challenges what we already know
	Fernández M.E.; Barotto A.J.; Martínez Meier A.; Gyenge J.E.; Tesón N.; Quiñones Martorello A.S.; Merlo E.; Dalla Salda G.; Rozenberg P.; Monteoliva S.
发表日期	2019
ISSN	0378-1127
卷号	454
英文摘要	Multispecies surveys have shown that there is a weak but significant trade-off between xylem efficiency and safety in woody species, with no species maximizing both attributes at the same time. Relationships between xylem structure and function are studied mostly at the interspecific level, with few studies considering the relationships at the intraspecific level, particularly in angiosperms. Studies have shown that relationships between xylem anatomy or wood density and vulnerability to cavitation (which determines xylem safety) observed in multi-species surveys may be different to those observed within a species. This raises the question about the value of multispecies studies to shed light over what is adaptive within a given species, the organization level at which natural and human selection operates. To contribute to this debate, we studied xylem structure and function in four Eucalyptus species, and made focus within one of them, E. globulus, to determine if patterns observed at the interspecific level are also held within a species. Eucalyptus species have a xylem composed by solitary vessels surrounded and connected to imperforate tracheary cells and parenchyma, a particular anatomy poorly known in terms of its function. Correlation analyses revealed that the trends observed between vessel size (mean and distribution) and vulnerability to cavitation are similar at the interspecific and intraspecific levels. Moreover, no trade-off has been observed between xylem efficiency (maximum hydraulic conductivity) and safety (water potential at 12% and 50% of hydraulic conductivity loss), but the opposite trend: individuals with mean larger vessels presented lower vulnerability to cavitation. Cells around vessels (parenchyma, vasicentric tracheids, fibertracheids) could be involved in this phenomenon since they correlate both with maximum hydraulic conductivity (positively) and vulnerability to cavitation (negatively) at the interspecific level. In addition, large xylem vessels presented smaller pits than small xylem vessels. This suggests that pit size is involved in the lack of trade-off between xylem safety and efficiency. Finally, vulnerability to cavitation was correlated with branch and stem wood density of the same tree, but correlations had opposite sign depending on the plant organ. These results provide new insights into the relationships between wood structure and function of angiosperm species. © 2019 Elsevier B.V.
英文关键词	Drought resistance; Pits size; Solitary vessels; Vulnerability to cavitation; Wood density; Xylem efficiency; Xylem safety
语种	英语
scopus关键词	Cavitation; Efficiency; Hardwoods; Hydraulic conductivity; Surveys; Wooden buildings; Angiosperm species; Correlation analysis; Drought resistance; Function relationships; Pits size; Safety and efficiencies; Solitary vessels; Wood density; Economic and social effects; anatomy; cavitation; density; drought resistance; evergreen tree; hydraulic conductivity; stem; vulnerability; wood; xylem; Cavitation; Efficiency; Hardwoods; Surveys; Vessels; Vulnerability; Wood Density; Xylem; Eucalyptus; Eucalyptus globulus; Magnoliophyta
来源期刊	Forest Ecology and Management
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/155696
作者单位	CONICET, Consejo Nacional de Investigaciones Científicas y Técnicas, Argentina; INTA, Instituto Nacional de Tecnología Agropecuaria, Grupo de Ecología Forestal, EEA Balcarce, AER Tandil, Argentina; Fac. de Ciencias Agrarias y Forestales, Univ. Nac. de La Plata, La Plata, Argentina; INTA, Instituto Nacional de Tecnología Agropecuaria, Grupo de Ecología Forestal – LEEMA, EEA Bariloche, Argentina; INTA, Instituto Nacional de Tecnología Agropecuaria, EEA Concordia, Concordia, Argentina; MaderaPlus Calidad Forestal SL, Parque Tecnológico de Galicia, Ed. CEI, Ourense, Spain; INRA, UMR0588 Biologie intégrée pour la valorisation de la diversité des arbres et de la forêt (Biofora), Orléans, France; International Associated Laboratory FORESTIA, INRA France-INTA, Argentina
推荐引用方式 GB/T 7714	Fernández M.E.,Barotto A.J.,Martínez Meier A.,et al. New insights into wood anatomy and function relationships: How Eucalyptus challenges what we already know[J],2019,454.
APA	Fernández M.E..,Barotto A.J..,Martínez Meier A..,Gyenge J.E..,Tesón N..,...&Monteoliva S..(2019).New insights into wood anatomy and function relationships: How Eucalyptus challenges what we already know.Forest Ecology and Management,454.
MLA	Fernández M.E.,et al."New insights into wood anatomy and function relationships: How Eucalyptus challenges what we already know".Forest Ecology and Management 454(2019).