Wood anatomical acclimation in the endemic genus Polylepis in Peruvian Andean forests  

作　　者：Anthony GUERRA Fressia N.AMES-MARTÍNEZ Ernesto C.RODRÍGUEZ-RAMÍREZ 

机构地区：[1]Postgraduate Programme in Agronomy/Plant Physiology Department of Biology-Institute of Natural Sciences,Federal University of Lavras,Lavras 37203-202,Minas Gerais 30000-31999,Brazil [2]Laboratory of Biotechnology and Molecular Biology,Continental University,San Antonio Urbanization,Huancayo 12000,Peru [3]Ecology and Biodiversity Research Programme,ANDINUS Association,Miguel Grau Street 370,Huancayo 12000,Peru [4]Dendrochronology Laboratory,Continental University,San Carlos Avenue 1980,Huancayo 12000,Peru

出　　处：《Journal of Mountain Science》2024年第9期2986-3000,共15页山地科学学报（英文）

基　　金：The authors are very grateful to park ranger the RPNYC,Eber Melgar Guerra Almerco for his support in sample collection and Cassiana Alves-Ferreira for his support in the Laboratorio de Anatomía e Identificación de Maderas,Universidad Continental;partial funding provided by EJ Requena-Rojas and M Morales(047-2015-Fondecyt-DE and CONICET PIP 11220130100584 project)。

摘　　要：Polylepis(Queñua)is a dominant woody plant genus in Andean Puna forests that occurs in a wide range of montane habitats and is ecologically diverse in endemism,which may be particularly threatened by climate change.Wood anatomical traits are essential for understanding how plants adjust their ecophysiological requirements and maximize their resilience,resistance,and recovery to extreme climates.Although the effects of extreme climatic conditions in high altitude ecosystems have been studied extensively,our knowledge is relatively limited to quantitative differences in the main xylem tissues.To address this gap,we assessed the acclimation of wood anatomical traits in six Peruvian Andean Polylepis species with different water availability(semi-dry with high moisture and semiarid with dry winters).We selected hydraulic diameter,vessel density,vessel grouping index,solitary vessel index,vulnerability index,mesomorphy index,vessel element length,fiber length,fiber wall thickness,fiber lumen diameter,and total fiber diameter that can provide relevant eco-wood anatomical acclimation to hydric stress.We performed multivariate analysis to determine the leading dimensions of covariation among Polylepis species and climatic factors.Specific wood anatomical traits(vessel grouping index,vulnerability index,and fiber wall thickness)were dissimilar between xeric-and mesic-Polyelpis species.This study demonstrates that wood anatomical traits in Peruvian Andean Polylepis species provides high-resolution and long-term eco-wood anatomical signals on how climate oscillations drive the acclimation processes of fiber and vessel traits.Our findings underscore the significance of xylem hydraulic adjustment to various hydrological environments in Andean puna forests.By evaluating the effects of drought on wood anatomical characteristics and ecological function,we demonstrate the capacity of tree species to adapt and endure climate-related changes,thereby emphasizing their resilience and adaptability.

关 键 词：Carlquist indices Climatic resilience Vessel traits Fiber Functional trait Hydric stress 

分 类 号：S781.1[农业科学—木材科学与技术]