Effect of Carbon/Nitrogen Balance on Photosynthetic Organisms: From Lab to Natural Environment

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

Deadline for manuscript submissions: 31 July 2025 | Viewed by 5415

Special Issue Editors


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Guest Editor
Department of Agriculture, Food and Environment, University of Pisa, Via Mariscoglio 34, 56124 Pisa, Italy
Interests: C and N availability; plant–environment interactions; abiotic stress; biotic stress; stress physiology; photosynthesis; leaf gas exchange; microalgae; urban forest; stable isotopes; acclimation; adaptation

E-Mail Website
Guest Editor
Department of Agriculture, Food and Environment, University of Pisa, Via Mariscoglio 34, 56124 Pisa, Italy
Interests: Impacts of global changes on plant physiology; cross-adaptation mechanism between different abiotic stresses; computational biology

Special Issue Information

Dear Colleagues,

In plants, as in other organisms, carbon (C) and nitrogen (N) are essential factors for various cellular functions, and their availability (referred to as C/N balance) must be tightly coordinated for optimal growth and development. Plants have developed mechanisms to sense and respond to different C/N levels, which then regulate the expression of genes and the activities of key enzymes coordinating C and N assimilation, transport, and metabolism. Moreover, C/N balance changes in response to environmental conditions, nutrient status, anthropogenic pollutants, microbial activity, and biotic stress, or under situations defined by species, cell type, developmental stage, and metabolic status.

Due to the importance of C/N balance, much effort has been made to understand the intricate regulatory machinery that controls C and N interactions in plants. In recent years, important progress has been made at laboratory level and under natural environments; however, there is still much to uncover. Therefore, this Special Issue of Plants aims to assemble contributions from researchers working in C/N balance effects that explore the metabolism and development of photosynthetic organisms and help to maximize our understanding about plant mechanisms from a collaborative, multidisciplinary perspective. Authors are invited to submit original research, reviews, communications, and opinion articles.

Dr. Thais Huarancca Reyes
Dr. Antonio Pompeiano
Guest Editors

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Keywords

  • algae
  • abiotic stress
  • biotic stress
  • climate change
  • environmental pollution
  • microbiome
  • photosynthesis
  • primary metabolism
  • plant–atmosphere–soil system
  • secondary metabolism
  • species interaction
  • stress physiology
  • volatile compounds
  • protein activity
  • gene expression
  • signaling/sensing pathways
  • membrane trafficking

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Published Papers (1 paper)

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Research

9 pages, 1834 KiB  
Article
Drought Stress, Elevated CO2 and Their Combination Differentially Affect Carbon and Nitrogen in Different Organs of Six Spring Wheat Genotypes
by Sajid Shokat, Fulai Liu and Dominik K. Großkinsky
Plants 2024, 13(20), 2942; https://doi.org/10.3390/plants13202942 - 21 Oct 2024
Cited by 1 | Viewed by 4466
Abstract
This study aimed to analyze the combined impact of CO2 and drought stress at the flowering stage on carbon (C), nitrogen (N), and CN ratios in leaves, stem, and grains of bread wheat. Six diverse bread wheat genotypes, comprised of two commercial [...] Read more.
This study aimed to analyze the combined impact of CO2 and drought stress at the flowering stage on carbon (C), nitrogen (N), and CN ratios in leaves, stem, and grains of bread wheat. Six diverse bread wheat genotypes, comprised of two commercial checks, two landraces, and two synthetics derivatives, were grown at two levels of CO2, i.e., 400 ppm and 800 ppm, and drought stress was imposed at the flowering stage through progressive soil drying. Stem, leaf, and grain samples were taken at maturity and concentrations of C and N were determined. Our results indicate that the threshold value of fraction of transpirable soil water (CFTSW) at which it diverges towards closure of stomata was different among genotypes and a higher range of values was estimated under elevated CO2. Drought significantly increased C levels in leaves and N levels in grains but decreased N levels in leaves, which increased CN ratios in leaves. In contrast, drought significantly reduced CN ratios in grains. Genotypes differed significantly in N content in grains, where the landrace derivative L2 maintained the highest N content. Moreover, pronounced changes in leaf N and CN ratios were induced by the combination of elevated CO2 and drought stress. Additionally, combined correlation and biplot analyses indicate a strong positive association of grain CN (GCN) with grain number, weight, and grain yield. These effects possibly interact with drought to strongly interfere with the impact of elevated CO2. The differential performance of the tested genotypes shows that selection of appropriate germplasm is essential to maintain agricultural production. Full article
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