Deacclimation kinetics as a quantitative phenotype for delineating the dormancy transition and thermal efficiency for budbreak in Vitis species

Kovaleski, Alisson P.; Reisch, Bruce I.; Londo, Jason P.

doi:10.1093/aobpla/ply066

Cited by 40 publications

(110 citation statements)

References 35 publications

(64 reference statements)

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“…Buds were removed on 31 Jan, 2 Feb, 5 Feb, 7 Feb, and 11 Feb 2018 for V. riparia and V. vinifera ; and 8 Feb and 11 Feb 2018 for V. amurensis . On 13 Feb 2018, cold hardiness of buds was determined and buds were moved back into cold room (4 °C), where they were maintained throughout the imaging period to minimize changes in cold hardiness and developmental stage (Kovaleski et al , 2018). This sampling scheme provided us with buds at 0, 2, 6, 8, 11, and 13 days of deacclimation for V. riparia and V. vinifera , and 0, 2, 5 days for V. amurensis .…”

Section: Methodsmentioning

confidence: 99%

“…The freezer is cooled at −4 °C hour −1 , and changes in voltage due to release of heat by freezing of water is measured by the TEMs and recorded via Keithley data logger (Tektronix, Beaverton, OR) attached to a computer. Deacclimation rates were estimated using linear regression (Kovaleski et al , 2018) using R (ver. 3.3.0, R Foundation for Statistical Computing).…”

Section: Methodsmentioning

confidence: 99%

“…For example, phenological scales for budbreak in grapevine are based on observations of V. vinifera buds (Coombe and Iland, 2005; Andreini et al , 2009) and may incorrectly describe changes that occur in wild species. Recently, this dormancy transition has been shown to be observed through the gradual increase in rate of cold hardiness loss that occurs with chill accumulation over the winter season (Kovaleski et al, 2018). However, the relationship between the kinetics of the deacclimation process and budbreak is different for species within Vitis : buds of cultivated grapevine ( V. vinifera ) only begin showing a budbreak phenotype after the majority of the supercooling ability is lost, whereas buds of V. riparia may present budbreak prior to fully losing their cold hardiness (Kovaleski et al , 2018).…”

Section: Introductionmentioning

confidence: 99%

“…Recently, this dormancy transition has been shown to be observed through the gradual increase in rate of cold hardiness loss that occurs with chill accumulation over the winter season (Kovaleski et al, 2018). However, the relationship between the kinetics of the deacclimation process and budbreak is different for species within Vitis : buds of cultivated grapevine ( V. vinifera ) only begin showing a budbreak phenotype after the majority of the supercooling ability is lost, whereas buds of V. riparia may present budbreak prior to fully losing their cold hardiness (Kovaleski et al , 2018). Therefore, exploring differences in morphological aspects of Vitis species buds during deacclimation may elucidate important differences in time to budbreak and its relation to deacclimation kinetics.…”

Section: Introductionmentioning

confidence: 99%

“…Maximum cold hardiness limits are different for different species, ranging from high negative temperatures (i.e., −7 °C) to very close to the ∼−42 °C supercooling limit (Quamme, 1995). Within grapevines, bud cold hardiness changes throughout the winter, primarily driven by changes in air temperature (Ferguson et al , 2011, 2014; Londo and Kovaleski, 2017; Kovaleski et al , 2018) and there is variation among species and cultivars within a species. Maximum cold hardiness has been observed to be mostly between −24 °C and −35 °C (Andrews et al , 1984; Ferguson et al , 2011, 2014; Londo and Kovaleski, 2017), with cultivated varieties being less cold hardy than wild species.…”

Section: Introductionmentioning

confidence: 99%

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X-ray phase contrast imaging ofVitisspp. buds shows freezing pattern and correlation between volume and cold hardiness

Kovaleski

Londo

Finkelstein

2019

Preprint

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Grapevine (Vitis spp.) buds must survive winter temperatures in order to resume growth when suitable conditions return in spring. They do so by developing cold hardiness through deep supercooling, but the mechanistic process of supercooling in buds remains largely unknown. Here we use synchrotron X-ray phase contrast imaging to study cold hardiness-related characteristics of V. amurensis, V. riparia, and V. vinifera buds: time-resolved 2D imaging was used to visualize freezing; and microtomography was used to evaluate morphological changes during deacclimation. Bud cold hardiness was determined (low temperature exotherms; LTEs) using needle thermocouples during 2D imaging as buds were cooled with a N2 gas cryostream. Resolution in 2D imaging did not allow for ice crystal identification, but freezing was assessed due to movement of tissues coinciding with LTE values. Freezing was observed to propagate from the center of the bud toward the outer bud scales. The freezing events observed lasted several minutes. Additionally, loss of supercooling ability appears to be correlated with increases in bud tissue volume during the process of deacclimation, but major increases in volume occur after most of the supercooling ability is lost, suggesting growth resumption processes are limited by deacclimation state.HighlightX-ray phase contrast imaging shows freezing occurs over several minutes and propagates from center toward tip of Vitis spp. buds. Incremental increase in bud volume correlates with cold deacclimation

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

X-ray phase contrast imaging ofVitisspp. buds shows freezing pattern and correlation between volume and cold hardiness

Kovaleski

Londo

Finkelstein

2019

Preprint

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The role of genotypic and climatic variation at the range edge: A case study in winegrapes

Jones,

Bogdanoff,

Wolkovich

2023

American J of Botany

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PremiseChanges in habitat suitability due to climate change are causing range shifts, with new habitat potentially available at cold range edges. We must predict these range shifts, but forecasters have limited knowledge of how genetic differences in plant physiological tolerances influence range shifts. Here, we focus on a major determinant of species ranges—physiological tolerance to extreme cold—to ask how warming over recent decades and genetic variation shape expansion across complex landscapes.MethodsWe examined how genotypes vary in maximum cold tolerance from 9 years of cold hardiness data across 18 genotypes from 13 sites, using winegrapes (Vitis vinifera subsp. vinifera) as a case study. Combining a Bayesian hierarchical dose‐response model with gridded climate data, we then project changes in climatic suitability near winegrapes’ current cold range‐edge between 1949 and 2016.ResultsPlants increased maximum cold hardiness non‐linearly with decreasing air temperature (maximum cold hardiness: –23.6°C), but with substantial (by 2°C) variation across genotypes. Our results suggest, since the 1980s, decreasing freeze injury risk has made conditions more favorable for all genotypes at the cold range‐edge, but conditions remained more favorable for more cold hardy genotypes and in warmer areas. There was substantial spatial variation in habitat suitability, with the majority of suitably warm habitat located in a narrow north‐south oriented strip.ConclusionsWe highlight the importance of genotypic differences in physiological tolerances when assessing range shift potential with climate change. Habitat improvements were unevenly distributed over the spatially complex landscape, though, emphasizing the importance of dispersal in range expansion.

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Vein‐to‐blade ratio is an allometric indicator of leaf size and plasticity

Chitwood

Mullins

Migicovsky

et al. 2021

American J of Botany

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Correlations with climate and physiological constraints have been proposed to explain the staggering diversity of leaf shapes and sizes. Just over a century ago, large, entire leaves were first observed to predominate in the tropics, while smaller, more dissected leaves are more commonly found in temperate regions Sinnott, 1915, 1916). The correlation between leaf serrations and present climate conditions can be used as indicators of ancient climates (Wolfe, 1978;Wilf, 1997;Peppe et al., 2011). Beyond serration correlations, scaling relationships constrain the relationship between blade and vein area across evolution. In mature, larger leaves, primary and secondary veins are wider but with less vein density compared to smaller leaves (Sack et al., 2012). These scaling laws have implications for leaf physiology, especially with respect to leaf hydraulic conductance, that offer a framework for the relationship between form and function in leaves and possibly explain major shifts in the evolutionary history of plants (Scoffoni et al., 2011;Sack and Scoffoni, 2013).To understand how broad patterns across plant evolution and geological time arise, ultimately, we must consider how leaves develop and how individual plants respond to the environment over a lifetime of growth. Distinguishing genetic, environmental, and interaction effects are critical to explain patterns in leaf shape and size observed from individual to global scales. Hypotheses about the mechanisms underlying plasticity in leaf shape have long been proposed (Goebel, 1908), but only careful work disentangling distinct processes-such as leaf ontogeny from the heteroblastic series-can inform as to when during development and how plasticity arises (Jones, 1995). Ontogenetic contingency-how the developmental program of an individual plant responds to changes in the environment during different phases of its life-can lead to disparate morphological outcomes in the same genotype or individual exposed to different environments (

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Deacclimation kinetics as a quantitative phenotype for delineating the dormancy transition and thermal efficiency for budbreak in Vitis species

Cited by 40 publications

References 35 publications

X-ray phase contrast imaging ofVitisspp. buds shows freezing pattern and correlation between volume and cold hardiness

X-ray phase contrast imaging ofVitisspp. buds shows freezing pattern and correlation between volume and cold hardiness

The role of genotypic and climatic variation at the range edge: A case study in winegrapes

Vein‐to‐blade ratio is an allometric indicator of leaf size and plasticity

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