Heat-stress response of photosystem II in five ecologically important tree species of European temperate forests

Húdoková, Hana; Petrík, Peter; Petek-Petrik, Anja; Konôpková, Alena; Leštianska, Adriana; Střelcová, Katarína; Kmeť, Jaroslav; Kurjak, Daniel

doi:10.1007/s11756-021-00958-9

Cited by 19 publications

(6 citation statements)

References 55 publications

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“…Rates of et al 2014). Consequently, temperatures inducing a rapid decline in Fv/Fm ratios are widely used to quantify heat tolerance in foliar tissue of trees (Dreyer et al 2001;Knight and Ackley 2003;O'Sullivan et al 2017;Zhu et al 2018;Húdoková et al 2022). Results of this study support that of others in that measurement of Fv/Fm ratios proved to be a sensitive measurement of foliar heat tolerance, distinguishing marked differences in heat tolerance between the 8 Acer genotypes evaluated.…”

Section: Recovery From Heat Stresssupporting

confidence: 75%

Evaluation of Heat Tolerance in Foliar Tissue ofAcerGenotypes

Percival,

Percival

2024

isa

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Background Extreme summer heat events in which temperatures exceed 40 °C are expected to increase in duration and intensity worldwide. Consequently, selecting heat-tolerant trees for future predicted climatic conditions will be one of the significant challenges for urban landscape managers. Method The effect of heat stress (44 °C for 4 hours) on chlorophyll variable:maximum fluorescence (Fv/Fm) ratios and Soil Plant Analysis Development (SPAD) values as measures of damage to the leaf photosynthetic system and leaf chlorophyll content was quantified in 8Acergenotypes (Acer pseudoplatanus‘Negenia’,A. pseudoplatanus‘Spaethii’,A. platanoides‘Royal Red’,A. platanoides‘Princeton Gold’,A. platanoides‘Emerald Queen’,A. platanoides‘Drummondii’,A. campestre,A. campestre‘Louisa Red Shine’). Results Fv/Fm ratios proved to be a sensitive indicator of heat damage and positively identified marked differences in tolerance to and recovery from heat damage between the 8Acergenotypes. Estimated leaf chlorophyll content (SPAD) was not sufficiently sensitive to distinguish differences in tolerance and recovery between genotypes. Conclusions Chlorophyll fluorescence Fv/Fm ratios, but not estimated leaf chlorophyll content (SPAD), offers a rapid screening technique for assessing the tolerance to and recovery from heat stress in leaf tissue of trees.

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Section: Recovery From Heat Stresssupporting

confidence: 75%

Evaluation of Heat Tolerance in Foliar Tissue ofAcerGenotypes

Percival,

Percival

2024

isa

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“…Húdoková et al . ( 2022 ) observed that heat waves of +5°C above daily average during the summer reduce A sat , PSII, and increase the degradation of Chl in temperate European beech trees ( Fagus sylvatica L.), while sessile oak, a Mediterranean tree species growing in warmer and drier environments, showed no effect. Thus, species adapted to higher temperature may better resist future conditions, while more sensitive ones may be seriously threatened ecologically.…”

Section: Introductionmentioning

confidence: 99%

Impact of warmer and drier conditions on tree photosynthetic properties and the role of species interactions

et al. 2022

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Increased temperature and prolonged soil moisture reduction have distinct impacts on tree photosynthetic properties. Yet, our knowledge of their combined effect is limited. Moreover, how species interactions alter photosynthetic responses to warming and drought remains unclear.Using mesocosms, we studied how photosynthetic properties of European beech and downy oak were impacted by multi-year warming and soil moisture reduction alone or combined, and how species interactions (intra-vs inter-specific interactions) modulated these effects.Warming of +5°C enhanced photosynthetic properties in oak but not beech, while moisture reduction decreased them in both species. Combined warming and moisture reduction reduced photosynthetic properties for both species, but no exacerbated effects were observed. Oak was less impacted by combined warming and limited moisture when interacting with beech than in intra-specific stands. For beech, species interactions had no impact on the photosynthetic responses to warming and moisture reduction, alone or combined.Warming had either no or beneficial effects on the photosynthetic properties, while moisture reduction and their combined effects strongly reduced photosynthetic responses. However, inter-specific interactions mitigated the adverse impacts of combined warming and drought in oak, thereby highlighting the need to deepen our understanding of the role of species interactions under climate change.

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“…Exposure of higher plants to temperatures that are higher for more than 5 °C above their optimal growing conditions leads to a distinct set of cellular and metabolic adjustments required for survival under high-temperature conditions [ 7 , 8 ] and their survival depends on their ability to use their natural adaptive mechanisms to deal with these adversities [ 9 ]. At the physiological level, unlike during a drought, when plants tend to close their stomata and reduce transpiration, during heat stress, plants tend to open their stomata to cool the leaf surface [ 10 ].…”

Section: Introductionmentioning

confidence: 99%

Ectomycorrhizal Fungi Modulate Pedunculate Oak’s Heat Stress Responses through the Alternation of Polyamines, Phenolics, and Osmotica Content

Kebert

Kostić

Čapelja

et al. 2022

Plants

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The physiological and biochemical responses of pedunculate oaks (Quercus robur L.) to heat stress (HS) and mycorrhization (individually as well in combination) were estimated. One-year-old Q. robur seedlings were grown under controlled conditions in a pot experiment, inoculated with a commercial inoculum of ectomycorrhizal (ECM) fungi, and subjected to 72 h of heat stress (40 °C/30 °C day/night temperature, relative humidity 80%, photoperiod 16/8 h) in a climate chamber, and they were compared with seedlings that were grown at room temperature (RT). An in-depth analysis of certain well-known stress-related metrics such as proline, total phenolics, FRAP, ABTS, non-protein thiols, and lipid peroxidation revealed that mycorrhized oak seedlings were more resistant to heat stress (HS) than non-mycorrhized oaks. Additionally, levels of specific polyamines, total phenolics, flavonoids, and condensed tannins as well as osmotica (proline and glycine betaine) content were measured and compared between four treatments: plants inoculated with ectomycorrhizal fungi exposed to heat stress (ECM-HS) and those grown only at RT (ECM-RT) versus non-mycorrhized controls exposed to heat stress (NM-HS) and those grown only at room temperature (NM-RT). In ectomycorrhiza inoculated oak seedlings, heat stress led to not only a rise in proline, total phenols, FRAP, ABTS, non-protein thiols, and lipid peroxidation but a notable decrease in glycine betaine and flavonoids. Amounts of three main polyamines (putrescine, spermine, and spermidine) were quantified by using high-performance liquid chromatography coupled with fluorescent detection (HPLC/FLD) after derivatization with dansyl-chloride. Heat stress significantly increased putrescine levels in non-mycorrhized oak seedlings but had no effect on spermidine or spermine levels, whereas heat stress significantly increased all inspected polyamine levels in oak seedlings inoculated with ectomycorrhizal inoculum. Spermidine (SPD) and spermine (SPM) contents were significantly higher in ECM-inoculated plants during heat stress (approximately 940 and 630 nmol g−1 DW, respectively), whereas these compounds were present in smaller amounts in non-mycorrhized oak seedlings (between 510 and 550 nmol g−1 DW for Spd and between 350 and 450 nmol g−1 DW for Spm). These findings supported the priming and biofertilizer roles of ectomycorrhizal fungi in the mitigation of heat stress in pedunculate oaks by modification of polyamines, phenolics, and osmotica content.

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Heat-stress response of photosystem II in five ecologically important tree species of European temperate forests

Cited by 19 publications

References 55 publications

Evaluation of Heat Tolerance in Foliar Tissue ofAcerGenotypes

Evaluation of Heat Tolerance in Foliar Tissue ofAcerGenotypes

Impact of warmer and drier conditions on tree photosynthetic properties and the role of species interactions

Ectomycorrhizal Fungi Modulate Pedunculate Oak’s Heat Stress Responses through the Alternation of Polyamines, Phenolics, and Osmotica Content

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