Plants in Urban Environments

A special issue of International Journal of Plant Biology (ISSN 2037-0164). This special issue belongs to the section "Plant Ecology and Biodiversity".

Deadline for manuscript submissions: 31 December 2026 | Viewed by 1117

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Department of Agricultural, Forest, Food, and Environmental Sciences (DAFE), University of Basilicata, Potenza, Italy
Interests: soil chemistry; sustainable soil management practices; soil fertility and conservation
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Special Issue Information

Dear Colleagues,

The International Journal of Plant Biology invites submissions for a Special Issue entitled “Plants in Urban Environments”, which will highlight recent advances in plant biology within urban and peri-urban systems.

Rapid urbanization is profoundly transforming landscapes and environmental conditions, creating heterogeneous habitats where plants are exposed to multiple interacting stressors. These include soil degradation and sealing, chemical pollution, altered water and nutrient cycles, heat island effects, habitat fragmentation, and novel biotic interactions. Despite these constraints, urban vegetation plays a key role in maintaining ecosystem services, mitigating climate change impacts, supporting biodiversity, and enhancing human well-being.

This Special Issue will provide an interdisciplinary forum for original research and review articles addressing plant responses and adaptations to urban environments. We welcome contributions on plant physiology, ecology, biochemistry, and molecular biology in cities, as well as on plant–soil–microorganism interactions, urban biodiversity patterns, and functional traits. Studies focusing on nature-based solutions, green infrastructure, urban forestry, and the role of plants in sustainable urban planning and resilience strategies are particularly encouraged.

Both fundamental and applied approaches are welcome, including field, experimental, and modeling studies across different climatic and geographic contexts. By bringing together diverse perspectives, this Special Issue will advance our understanding of plant functioning in urban ecosystems and support science-based strategies for greener, healthier, and more resilient cities.

Dr. Adriano Sofo
Dr. Alba N. Mininni
Guest Editors

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Keywords

  • urban plant biology
  • urban ecology
  • plant stress physiology
  • plant–soil interactions
  • urban soils
  • green infrastructure
  • urban biodiversity
  • ecosystem services
  • nature-based solutions
  • climate change adaptation

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Published Papers (1 paper)

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Research

17 pages, 1193 KB  
Article
Genotypic Variation in Foliar Heat Tolerance Among 35 Malus Genotypes: Implications for Urban Tree Selection Under Climate Change
by Glynn C. Percival
Int. J. Plant Biol. 2026, 17(7), 52; https://doi.org/10.3390/ijpb17070052 - 29 Jun 2026
Viewed by 491
Abstract
The frequency and intensity of heatwaves are increasing annually worldwide due to climate change. Combined with the urban heat island effect, elevated heat stress episodes threaten the survival and performance of urban trees, in turn reducing their ecosystem benefits. For this reason, the [...] Read more.
The frequency and intensity of heatwaves are increasing annually worldwide due to climate change. Combined with the urban heat island effect, elevated heat stress episodes threaten the survival and performance of urban trees, in turn reducing their ecosystem benefits. For this reason, the foliar heat tolerance of 35 Malus genotypes (two species, 32 cultivars, one variety, one hybrid) was evaluated under controlled laboratory assays. Heat injury to foliar tissue was quantified using chlorophyll fluorescence (Fv/Fm) to assess photosystem II (PSII) damage and an electrolyte leakage index (ELI) to evaluate cellular membrane integrity. A preliminary dose–response experiment using six genotypes exposed to a temperature gradient (40–50 °C) was conducted to establish thermal response curves and derive LT50 values (temperature at 50% decline in Fv/Fm). These analyses confirmed substantial genotypic variation in thermal tolerance and identified 45 °C as an optimal discriminatory temperature for large-scale screening. This temperature was subsequently applied to assess heat injury across all 35 genotypes. Measurements were conducted in May (spring foliage) and August (summer foliage) to evaluate ontogenetic influences. In some instances, only one genotype was available for experimental purposes. Consequently, conclusions regarding genotypic differences in heat tolerance are based on replicated datasets, whereas genotypes represented by single-tree sampling are presented for descriptive purposes only. Heat stress significantly affected Fv/Fm and ELI, with strong genotype and seasonal effects recorded. In most genotypes, foliar damage was greater in spring than in summer. Good correlations between Fv/Fm and ELI confirmed their value as complementary physiological measures of heat tolerance in plants. Of the 35 genotypes evaluated, Malus sargentii, M. ‘Prairifire’, M. baccata ‘Jackii’, M. ‘Royal Fountain Huber’ and M. Donald Wyman were the most heat tolerant. The substantial variation in foliar heat tolerance detected across the 35 genotypes tested demonstrates potential for selecting Malus genotypes with superior foliar heat tolerance and highlights opportunities for identifying heat resilient candidates among other under-utilized urban tree taxa. Full article
(This article belongs to the Special Issue Plants in Urban Environments)
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