Working Paper Article Version 1 This version is not peer-reviewed

Variations in Wood Density, Annual Ring Widths and Other Anatomical Properties of Quercus brantii Affected by Crown Dieback

Version 1 : Received: 31 March 2021 / Approved: 2 April 2021 / Online: 2 April 2021 (11:12:56 CEST)

A peer-reviewed article of this Preprint also exists.

Soheili, F.; Woodward, S.; Almasi, I.; Abdul-Hamid, H.; Naji, H.R. Variations in Wood Density, Annual Ring Width and Vessel Properties of Quercus brantii Affected by Crown Dieback. Forests 2021, 12, 642. Soheili, F.; Woodward, S.; Almasi, I.; Abdul-Hamid, H.; Naji, H.R. Variations in Wood Density, Annual Ring Width and Vessel Properties of Quercus brantii Affected by Crown Dieback. Forests 2021, 12, 642.

Journal reference: Forests 2021, 12, 642
DOI: 10.3390/f12050642

Abstract

Tree decline resulting from climate change results in physiological weaknesses, attack by harmful pests and pathogen, and threatens forest ecosystem stability. In the work described here, the effects of drought on wood density, tree ring width, and variations in vessel morphology were investigated in Persian oak (Quercus brantii) in the forests of the Zagros Mountains, Ilam province, western Iran. Radial discs were cut from trunks of declined and healthy trees and wood blocks cut radially from the sapwood, heartwood, and juvenile core. Observations were made on transverse sections from the blocks using microscopy. In trees with decline symptoms, wood density was greater than the healthy trees. Furthermore, declining trees had the narrowest ring width, reduced vessel diameter, vessel area, and highest number of vessels and tylose in pith towards bark. It was concluded that changes in anatomical features are associated with the weakening of the trees and are components in declining tree health.

Keywords

climate change; tree decline; wood physical properties; wood anatomy; Quercus brantii

Subject

BIOLOGY, Anatomy & Morphology

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