Xylem Water Distribution in Woody Plants Visualized

A special issue of Forests (ISSN 1999-4907). This special issue belongs to the section "Wood Science and Forest Products".

Deadline for manuscript submissions: closed (10 May 2023) | Viewed by 2205

Special Issue Editor


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Guest Editor
School of Environmental and Forest Sciences, University of Washington, Seattle, WA, USA
Interests: tree growth; tree physiology; microscopy; wood anatomy; plant anatomy; physiology; botany; ecology; confocal microscopy; anatomy

Special Issue Information

Dear Colleagues,

Water transport is a critical xylem function that affects photosynthesis, growth, plant vitality, and ultimately plant survival. Trees develop secondary xylem (wood) that is amazingly complex and diverse across species. The variation of xylem structure is directly related to differences in drought tolerance and the species strategy for adaptation to a specific water environment and climate. Studying the relationships between water transport and xylem structure is fundamental for understanding species ecology, and provides important knowledge for sylvicultural, tree improvement, and forest restoration practices.

A major limitation to the research on the hydraulic function of xylem cells is the technical difficulty to visualize the free water as it occurs in real-time in the intact plant. Indirect observations of water transport by microscopy using small particles or dye tracers remain popular in xylem function research. Water flow tracers that can be visualized by conventional light microscopy, combined with plant physiological experiments, have provided the basic knowledge of the transport processes in xylem.  

Revolutionary new techniques for studying xylem water in real-time are now available, including cryo-microscopy, synchrotron, and X-ray microtomography. This Special Issue plans to give an overview of the most recent advances in the studies of free water movement in secondary xylem. This Special Issue aims to provide selected contributions on advances in understanding the water pathways and water storage in xylem and how they relate to plant eco-physiology.

Potential topics include, but are not limited to:

  • Application of cryo-light microscopy and cryo-SEM in studies of the water content of xylem cells.
  • Three-dimensional microscopy of the water flow pathways of xylem.
  • X-ray microtomography of water content and water movement in the living plant.
  • Xylem flow tracers.

Dr. Peter Kitin
Guest Editor

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Keywords

  • cryo-light microscopy
  • cryo-SEM
  • embolism
  • plant–water relations
  • tree sap
  • xylem structure and function
  • X-ray microtomography (microCT)

Published Papers (1 paper)

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Research

13 pages, 3601 KiB  
Article
Water Transport Characteristics of Multiple Structures of Xylem Vessels in Magnolia
by Tianyu Xu, Shuteng Zhi, Yanru Su, Zonglei Li and Ennan Zheng
Forests 2022, 13(10), 1617; https://doi.org/10.3390/f13101617 - 2 Oct 2022
Cited by 2 | Viewed by 1851
Abstract
The multiple structures of xylem vessels in Magnolia provide stable and efficient water transport channels. The structural parameters of xylem vessels were studied in wood sections and in macerated materials. The results showed that the xylem vessels of Magnolia contained a helical thickening [...] Read more.
The multiple structures of xylem vessels in Magnolia provide stable and efficient water transport channels. The structural parameters of xylem vessels were studied in wood sections and in macerated materials. The results showed that the xylem vessels of Magnolia contained a helical thickening structure and a pit structure of a secondary wall, and the end walls had a scalariform perforation plate. The helical thickening and scalariform perforation plate increased the flow resistance of the vessel, and the pit structure decreased the flow resistance of the vessel. There was a close positive correlation between the flow resistance of the vessels and the helical width, the helical height, the thickness of the scalariform perforation plate, the number of holes in the scalariform perforation plate, the length of the pit canal, and the pit spacing. In addition, there was a negative correlation between the flow resistance of the vessels and the helical spacing, the pit vertical diameter, and the pit domain length. Among these structural parameters, the helical height, the number of holes, and the length of pit canal had a greater influence on the flow resistance. The pit structure caused the vessel to produce radial water transport. The radial transmission efficiency increased with the increase in the pit domain length. With no pit membrane in the pit structure of Magnolia, the radial transmission efficiency would be between 43.99% and 53.21%. Full article
(This article belongs to the Special Issue Xylem Water Distribution in Woody Plants Visualized)
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