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Forests
Special Issues
Physiology and Genetic Variability of Forest Trees under Drought Stress
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Physiology and Genetic Variability of Forest Trees under Drought Stress

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

Deadline for manuscript submissions: closed (30 October 2022) | Viewed by 1668

Special Issue Editors

Dr. Mladen Ivankovic

E-Mail Website
Guest Editor
Division of Genetics, Forest Tree Breeding and Seed Science, Croatian Forest Research Institute, HR-10450 Jastrebarsko, Croatia
Interests: Genetic diversity; Ecotypic variability; Quantitative traits; Climate change; Macroclimatic adaptation; Forest Reproductive Material; Seed Science; Seed object; Provenance trial; Forest conservation; Gene bank
Dr. Nevenka Ćelepirović

E-Mail Website
Guest Editor
Division of Genetics, Forest Tree Breeding and Seed Science, Croatian Forest Research Institute, HR-10450 Jastrebarsko, Croatia
Interests: population genetics; genetic variability; tree physiology; fungal pathogens
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

In the living world, forest trees possess a unique feature: a long lifespan. As a result, forests are one of the most effective models for researching adaptability to changing environmental conditions. Climate change, particularly an increase in the frequency and intensity of summer heat and drought, has major consequences for forests. Trees have evolved “tactics” and processes to cope with dryness in different types of environments in glacial–interglacial cycles. Individual trees and populations have developed a variety of adaptations to dry environments. Physiological responses targeted at enhancing tissue tolerance to dehydration have aided the evolution of specialized adaptations in water-stressed environments. Drought-related changes in the genome have made it possible to pass on vital information to future generations. The objective of this Special Issue of Forests is to promote a multidisciplinary approach to the study of forest tree adaptation to new living conditions and new approaches to forest conservation.

Dr. Mladen Ivankovic
Dr. Nevenka Ćelepirović
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Forests is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • climate warming
  • abiotic stress
  • drought
  • adaptability
  • population genetics
  • trees growth
  • trees physiology
  • nutrients cycling
  • molecular markers

Published Papers (1 paper)

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Research

23 pages, 3299 KiB  
Article
Chlorophyll Pigment and Leaf Macronutrient Trait Variation of Four Salix Species in Elevated CO2, under Soil Moisture Stress and Fertilization Treatments
by John E. Major, Alex Mosseler and John W. Malcolm
Forests 2023, 14(1), 42; https://0-doi-org.brum.beds.ac.uk/10.3390/f14010042 - 26 Dec 2022
Cited by 1 | Viewed by 1199
Abstract
Leaf chlorophyll pigment and macronutrient concentrations were quantified for four willow species (Salix cordata (COR), S. discolor (DIS), S. eriocephala (ERI) and S. interior (INT)) while growing under 2 × 2 factorial of ambient and elevated CO2 and well-watered and drought-stressed [...] Read more.
Leaf chlorophyll pigment and macronutrient concentrations were quantified for four willow species (Salix cordata (COR), S. discolor (DIS), S. eriocephala (ERI) and S. interior (INT)) while growing under 2 × 2 factorial of ambient and elevated CO2 and well-watered and drought-stressed soil moisture treatments (Expt. 1). After the first year, we saw no difference in stem biomass between CO2 treatments. In the following year, a second experiment was conducted on a subset of well-watered willows as a 2 × 2 factorial of atmospheric CO2 and soil fertilization (FERT). For both years of Expt. 1, chlorophyll a, b, a + b (TCC) and carotenoids (CAR) significantly downregulated in response to elevated CO2 (eCO2) and upregulated in response to drought (DRT). In Expt. 2, FERT mitigated CO2 downregulation of TCC and CAR, and upregulated TCC and CAR. Across species, ERI had the greatest pigment concentrations followed by either COR or DIS. Except for one case, INT had the lowest pigment concentrations. A significant species x FERT interaction was due to magnitude effects. The CHLa:b ratio was not affected by CO2 or DRT but did increase in response to FERT. INT had the greatest CHLa:b ratio followed by DIS, then either ERI or COR. In the second year, TCC:CAR ratio decreased in response to eCO2 and increased in response to DRT and FERT. In Expt. 1, leaf N was the only nutrient to significantly downregulate in response to eCO2; whereas all other nutrient levels remained unchanged. In response to DRT, leaf N and Mg upregulated; whereas leaf P, K, and Ca were downregulated. In response to eCO2 in Expt. 2, again only leaf N downregulated; whereas all other nutrients remained unchanged. All leaf nutrients upregulated in response to FERT. Of the four species, INT had the greatest leaf N and K, and the lowest Ca. Species variation was important, but so to was clonal variation in response to change. Indeed, INT leaf chlorophyll and macronutrients are significantly different or segregated from the other three willow species and this may be related to the evolutionary origins of INT, and other species of the taxonomic section Longifoliae, in the arid southwest USA and Mexico. Furthermore, under low nutrient conditions, it may be necessary to fertilize the plants to see a biomass response to eCO2. Full article
(This article belongs to the Special Issue Physiology and Genetic Variability of Forest Trees under Drought Stress)
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