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Exploring wood anatomy, density and chemistry profiles to understand the tree-ring formation in Amazonian tree species

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Author(s):
Ortega Rodriguez, Daigard Ricardo ; Hevia, Andrea ; Sanchez-Salguero, Raul ; Santini, Luiz ; Pereira de Carvalho, Hudson Wallace ; Roig, Fidel A. ; Tomazello-Filho, Mario
Total Authors: 7
Document type: Journal article
Source: DENDROCHRONOLOGIA; v. 71, p. 17-pg., 2022-02-01.
Abstract

Long-term analysis of tree growth using annual tree rings is increasingly in demand for tropical tree species. The basis of these studies has traditionally been the anatomical identification of the annual ring boundary. However, the structure of these annual rings has been sparsely explored for complementary physical and chemical wood traits. Here, we explore the relationships among wood density features and chemical elements (S, K, Ca, Mn) involved in the annual tree ring formation of 12 tropical tree species from non-flooded forest in the southern Amazon basin. Transverse wood sections were used for each species to determine: 1) macroscopic distinction (radial growth and wood density), 2) microscopic analyse of vessels, axial and ray parenchyma (anatomy) and 3) X-ray densitometry (physical) and X-ray fluorescence (chemical). For some species, the profiles of wood density, and Ca and Mn content showed intra-and inter-annual patterns that allowed to define and characterize the growth boundary of tree rings. Ca, K and S were mainly distributed in axial parenchyma cells, and around vessels, whereas, Mn was mainly distributed in fibres. Our results showed significant species-specific correlations between tree-ring width, density and concentrations of Ca, K and Mn. The anatomical characterization and the complementary information provided by the density and chemical profiles in some Amazonian species can represent a valuable proxy to improve the definition of annual ring-boundaries and improve the understanding of long-term growth and physiological patterns. (AU)

FAPESP's process: 15/05942-0 - Shedding light on the metabolism of nanomaterials absorbed by plants with X-ray and vibrational spectroscopy
Grantee:Hudson Wallace Pereira de Carvalho
Support Opportunities: Research Grants - Young Investigators Grants
FAPESP's process: 09/53951-7 - Set up of a Multi-User Laboratory specializing in the use of near-infrared spectroscopy and X-ray densitometry in agroforestry applications
Grantee:Mario Tommasiello Filho
Support Opportunities: Multi-user Equipment Program
FAPESP's process: 15/19121-8 - Multi-User Equipment approved in grant 2015/05942-0: micro X-Ray Fluorescence system
Grantee:Hudson Wallace Pereira de Carvalho
Support Opportunities: Multi-user Equipment Program
FAPESP's process: 17/50085-3 - PIRE: climate research education in the Americas using tree-ring speleothem examples (PIRE-CREATE)
Grantee:Francisco William da Cruz Junior
Support Opportunities: Research Projects - Thematic Grants
FAPESP's process: 18/22914-8 - Global climate change in the Amazon tropical forest assessed by dendrocronological multi-proxy
Grantee:Daigard Ricardo Ortega Rodriguez
Support Opportunities: Scholarships in Brazil - Doctorate
FAPESP's process: 19/05675-2 - Characterization of tree growth rings jatobá (Hymenaea courbaril L.) and cedro (Cedrela odorata L.), occurrents in the FLONA-Tapajós, pa, Brazil
Grantee:Pedro Henrique da Silva Vieira
Support Opportunities: Scholarships in Brazil - Scientific Initiation
FAPESP's process: 19/07576-1 - Technical training in dendrochronology, wood anatomy and X-ray
Grantee:Luiz Santini Junior
Support Opportunities: Scholarships in Brazil - Technical Training Program - Technical Training