Methods for Measuring Frost Tolerance of Conifers: A Systematic Map

Zamkova, Anastasia-Ainhoa Atucha; Steele, Katherine A.; Smith, Andy

doi:10.3390/f12081094

Cited by 8 publications

(10 citation statements)

References 109 publications

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“…Zamkova et al [13] map the literature on frost-tolerance measuring techniques in gymnosperms, focusing mainly on conifers. They document which techniques have been used and how, the technical constraints of measuring frost tolerance, and correlations among different techniques related to measurement performance.…”

Section: Systematic Mapsmentioning

confidence: 99%

The Value of Systematic Evidence Synthesis in Forestry, Land Use and Development to Improve Research, Decision-Making and Practice

Petrokofsky

Savilaakso

2021

Forests

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Despite well-established procedures for using systematic evidence-informed approaches to policy and practice in fields as diverse as medicine, crime and justice, education, and conservation, the uptake of these rigorous methods of synthesising relevant literature has been disappointingly slow in forestry and related fields. This may be due to: general lack of understanding of, or misconceptions about, systematic evidence synthesis; a belief that the method is inappropriate for the “messy” world of forestry and land-use; a dislike of the protocol-driven approach that underpins systematic evidence synthesis; the rigorous approach is beyond the resources of time and funding available for a given topic review; systematic reviews can only be undertaken by a narrow “elite”; or a combination of these. The current Special Issue of Forests brings together a range of papers that demonstrate that systematic evidence synthesis is appropriate for forestry and land-use policy and practice, and that the method is evolving to embrace new ideas that fit with the core tenets of comprehensiveness, transparency, and procedural objectivity.

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Section: Systematic Mapsmentioning

confidence: 99%

The Value of Systematic Evidence Synthesis in Forestry, Land Use and Development to Improve Research, Decision-Making and Practice

Petrokofsky

Savilaakso

2021

Forests

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“…An objective assessment of the frost resistance of woody plants can be obtained via the methods of electrolyte leakage, chlorophyll fluorometry, differential thermal analysis, electrical impedance spectroscopy, and others [15,16]. However, these methods of diagnosing frost resistance are quite laborious and slow.…”

Section: Introductionmentioning

confidence: 99%

Vegetation and Dormancy States Identification in Coniferous Plants Based on Hyperspectral Imaging Data

Dmitriev,

Kozlovsky,

Dmitrieva

2024

Horticulturae

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Conifers are a common type of plant used in ornamental horticulture. The prompt diagnosis of the phenological state of coniferous plants using remote sensing is crucial for forecasting the consequences of extreme weather events. This is the first study to identify the “Vegetation” and “Dormancy” states in coniferous plants by analyzing their annual time series of spectral characteristics. The study analyzed Platycladus orientalis, Thuja occidentalis and T. plicata using time series values of 81 vegetation indices and 125 spectral bands. Linear discriminant analysis (LDA) was used to identify “Vegetation” and “Dormancy” states. The model contained three to four independent variables and achieved a high level of correctness (92.3 to 96.1%) and test accuracy (92.1 to 96.0%). The LDA model assigns the highest weight to vegetation indices that are sensitive to photosynthetic pigments, such as the photochemical reflectance index (PRI), normalized PRI (PRI_norm), the ratio of PRI to coloration index 2 (PRI/CI2), and derivative index 2 (D2). The random forest method also diagnoses the “Vegetation” and “Dormancy” states with high accuracy (97.3%). The vegetation indices chlorophyll/carotenoid index (CCI), PRI, PRI_norm and PRI/CI2 contribute the most to the mean decrease accuracy and mean decrease Gini. Diagnosing the phenological state of conifers throughout the annual cycle will allow for the effective planning of management measures in conifer plantations.

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“…Cold acclimation and tolerance can be calculated through many different methods, but in essence all methods operate by exposing plants to cold temperatures and assessing damage [17]. The specific temperatures, exposure time, and damage assessment vary between studies and plant species [17]. One technique is to assess plants for visual damage from freezing temperatures, though this can often be a tedious task [17].…”

Section: Introductionmentioning

confidence: 99%

Changes in Polar Lipid Composition in Balsam Fir during Seasonal Cold Acclimation and Relationship to Needle Abscission

MacDonald,

Lada,

MacDonald

et al. 2023

IJMS

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Needle abscission in balsam fir has been linked to both cold acclimation and changes in lipid composition. The overall objective of this research is to uncover lipid changes in balsam fir during cold acclimation and link those changes with postharvest abscission. Branches were collected monthly from September to December and were assessed for cold tolerance via membrane leakage and chlorophyll fluorescence changes at −5, −15, −25, −35, and −45 °C. Lipids were extracted and analyzed using mass spectrometry while postharvest needle abscission was determined gravimetrically. Cold tolerance and needle retention each significantly (p < 0.001) improved throughout autumn in balsam fir. There were concurrent increases in DGDG, PC, PG, PE, and PA throughout autumn as well as a decrease in MGDG. Those same lipids were strongly related to cold tolerance, though MGDG had the strongest relationship (R2 = 55.0% and 42.7% from membrane injury and chlorophyll fluorescence, respectively). There was a similar, albeit weaker, relationship between MGDG:DGDG and needle retention (R2 = 24.3%). Generally, a decrease in MGDG:DGDG ratio resulted in better cold tolerance and higher needle retention in balsam fir, possibly due to increased membrane stability. This study confirms the degree of cold acclimation in Nova Scotian balsam fir and presents practical significance to industry by identifying the timing of peak needle retention. It is suggested that MGDG:DGDG might be a beneficial tool for screening balsam fir genotypes with higher needle retention characteristics.

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Methods for Measuring Frost Tolerance of Conifers: A Systematic Map

Cited by 8 publications

References 109 publications

The Value of Systematic Evidence Synthesis in Forestry, Land Use and Development to Improve Research, Decision-Making and Practice

The Value of Systematic Evidence Synthesis in Forestry, Land Use and Development to Improve Research, Decision-Making and Practice

Vegetation and Dormancy States Identification in Coniferous Plants Based on Hyperspectral Imaging Data

Changes in Polar Lipid Composition in Balsam Fir during Seasonal Cold Acclimation and Relationship to Needle Abscission

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