Aerenchyma in Plants: Formation, Structure and Function

A special issue of Plants (ISSN 2223-7747). This special issue belongs to the section "Plant Development and Morphogenesis".

Deadline for manuscript submissions: closed (30 December 2023) | Viewed by 1397

Special Issue Editors


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Guest Editor
Instituto de Ciências da Natureza, Universidade Federal de Alfenas, Alfenas, CEP, Brazil
Interests: plant anatomy; plant physiology

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Guest Editor
Department of Agricultural, Food, and Environmental Sciences, University of Perugia, Perugia, Italy
Interests: plant anatomy; plant physiology; plant reproduction; electron microscopy; immunohistochemistry
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Special Issue Information

Dear Colleagues,

Aerenchyma is a key tissue in plant survival and stress tolerance. It develops in plants under different environmental situations; waterlogging, drought, nutrient starvation and exposure to potentially toxic elements are some examples of these factors. The function of aerenchyma depends on which environmental pressures plants need to overcome; thus, this tissue is often associated with floatability, gas diffusion, hydraulic conductance, and a reduction in the metabolic cost of root growth, among others. Consequently, an investigation of the formation, structure and function of aerenchyma is fundamental to understanding how a plant interacts with its environment, and it is an important subject for understanding plant anatomy, physiology, ecology, agronomy and biotechnology. This Special Issue welcomes submissions regarding any aspects of aerenchyma development, structure and function in order to compile and disclose novel and exciting information about this essential and fascinating plant tissue.

Prof. Dr. Fabricio Jose Pereira
Dr. Martina Cerri
Guest Editors

Manuscript Submission Information

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Keywords

  • gas diffusion
  • ethylene
  • intercellular spaces
  • programmed cell death
  • hypoxia
  • water stress

Published Papers (1 paper)

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Research

11 pages, 2076 KiB  
Article
Spatial O2 Profile in Coix lacryma-jobi and Sorghum bicolor along the Gas Diffusion Pathway under Waterlogging Conditions
by Shotaro Tamaru, Keita Goto and Jun-Ichi Sakagami
Plants 2024, 13(1), 3; https://doi.org/10.3390/plants13010003 - 19 Dec 2023
Viewed by 816
Abstract
While internal aeration in plants is critical for adaptation to waterlogging, there is a gap in understanding the differences in oxygen diffusion gradients from shoots to roots between hypoxia-tolerant and -sensitive species. This study aims to elucidate the differences in tissue oxygen concentration [...] Read more.
While internal aeration in plants is critical for adaptation to waterlogging, there is a gap in understanding the differences in oxygen diffusion gradients from shoots to roots between hypoxia-tolerant and -sensitive species. This study aims to elucidate the differences in tissue oxygen concentration at various locations on the shoot and root between a hypoxia-tolerant species and a -sensitive species using a microneedle sensor that allows for spatial oxygen profiling. Job’s tears, a hypoxia-tolerant species, and sorghum, a hypoxia-susceptible species, were tested. Plants aged 10 days were acclimated to a hypoxic agar solution for 12 days. Oxygen was profiled near the root tip, root base, root shoot junction, stem, and leaf. An anatomical analysis was also performed on the roots used for the O2 profile. The oxygen partial pressure (pO2) values at the root base and tip of sorghum were significantly lower than that of the root of Job’s tears. At the base of the root of Job’s tears, pO2 rapidly decreased from the root cortex to the surface, indicating a function to inhibit oxygen leakage. No significant differences in pO2 between the species were identified in the shoot part. The root cortex to stele ratio was significantly higher from the root tip to the base in Job’s tears compared to sorghum. The pO2 gradient began to differ greatly at the root shoot junction and root base longitudinally, and between the cortex and stele radially, between Job’s tears and sorghum. Differences in the root oxygen retention capacity and the cortex to stele ratio are considered to be related to differences in pO2. Full article
(This article belongs to the Special Issue Aerenchyma in Plants: Formation, Structure and Function)
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