Provenance selection and site conditions determine growth performance of pedunculate oak

Buras, Allan; Sass‐Klaassen, Ute; Verbeek, Inge; Copini, Paul

doi:10.1016/j.dendro.2020.125705

Cited by 30 publications

(14 citation statements)

References 52 publications

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“…The use of high-quality planting material guarantees the success of seed-based restoration programs [77], and selection of forest restoration material with priority areas for sourcing seeds can be supported by provenance comparisons reported in our studies (Figure 2) because oxidation processes reported in stored seeds are transferred to seedlings [27]. Provenance selection determines the growth performance of Q. robur [78]; in this context, seeds of Parczew provenance quickly losing vitality should not be considered for long-term storage and reforestation purposes. Moreover, pedunculate oak seedlings display provenance-dependent growth responses under a changing climate with air warming and drought [79].…”

Section: Discussionsupporting

confidence: 65%

Thermotherapy and Storage Temperature Manipulations Limit the Production of Reactive Oxygen Species in Stored Pedunculate Oak Acorns

Kalemba¹,

Wawrzyniak²,

Suszka³

et al. 2021

Forests

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For many species, seed storage protocols are still being improved to provide viable seeds of the highest quality. Seed storage is extremely problematic for short-lived seeds categorized as recalcitrant, including pedunculate oak (Quercus robur L.), for which the optimal seed storage protocol involves a temperature of –3 °C and 40% acorn moisture content recommendations. The sensitivity of pedunculated oak seeds to temperature manipulations under preparation for long-term storage has been poorly investigated, particularly in terms of the production of reactive oxygen species (ROS), which are assumed to be determinants of seed longevity. Thermotherapy, the pathogen elimination procedure, did not increase the level of three types of ROS: hydrogen peroxide (H2O2), superoxide anion radical and hydroxyl radical (•OH). The temporal heat stress of thermotherapy resulted in slightly reduced levels of H2O2, indicating activation of the antioxidant systems in acorn preparation for storage. The effect of constant storage temperatures (−3, −5, −7 °C) and their combinations (−3 → −5 °C or −3 → −5 →−7 °C) on ROS levels and seed viability was investigated in three provenances. The highest ROS levels were detected in acorns stored at −7 °C, whereas three-step cold acclimation was beneficial for reducing ROS levels. Interestingly, the levels of H2O2 were not affected by temperature in thermotherapized acorns. In contrast, decreasing storage temperature caused a linear increase in •OH levels in all provenances. The effect of heat stress and cold stress on ROS levels in relation to long-term seed storage of pedunculate oak is discussed here in relation to the seed viability evidenced via germination rates, seedling emergence and electrolyte leakage. Thermotherapy and cold acclimation of acorns can improve their viability after storage by decreasing ROS levels.

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Section: Discussionsupporting

confidence: 65%

Thermotherapy and Storage Temperature Manipulations Limit the Production of Reactive Oxygen Species in Stored Pedunculate Oak Acorns

Kalemba¹,

Wawrzyniak²,

Suszka³

et al. 2021

Forests

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“…Provenance trials have been used to analyze intraspecific variation in climate growth response in several tree species, such as Pinus contorta [39,41], Pinus sylvestris, Fagus sylvatica and Quercus petraea [42], Quercus robur [43], Picea glauca [44,45], Pseudotsuga menziesii var. menziesii [46,47], Picea abies [42,[48][49][50][51], and Abies alba [34,52].…”

Section: Introductionmentioning

confidence: 99%

Intraspecific Growth Response to Drought of Abies alba in the Southeastern Carpathians

Mihai

Alexandru

Stoica

et al. 2021

Forests

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The intensity and frequency of drought have increased considerably during the last decades in southeastern Europe, and projected scenarios suggest that southern and central Europe will be affected by more drought events by the end of the 21st century. In this context, assessing the intraspecific genetic variation of forest tree species and identifying populations expected to be best adapted to future climate conditions is essential for increasing forest productivity and adaptability. Using a tree-ring database from 60 populations of 38-year-old silver fir (Abies alba) in five trial sites established across Romania, we studied the variation of growth and wood characteristics, provenance-specific response to drought, and climate-growth relationships during the period 1997–2018. The drought response of provenances was determined by four drought parameters: resistance, recovery, resilience, and relative resilience. Based on the standardized precipitation index, ten years with extreme and severe drought were identified for all trial sites. Considerable differences in radial growth, wood characteristics, and drought response parameters among silver fir provenances have been found. The provenances’ ranking by resistance, recovery, and resilience revealed that a number of provenances from Bulgaria, Italy, Romania, and Czech Republic placed in the top ranks in almost all sites. Additionally, there are provenances that combine high productivity and drought tolerance. The correlations between drought parameters and wood characters are positive, the most significant correlations being obtained between radial growth and resilience. Correlations between drought parameters and wood density were non-significant, indicating that wood density cannot be used as indicator of drought sensitivity. The negative correlations between radial growth and temperature during the growing season and the positive correlations with precipitation suggest that warming and water deficit could have a negative impact on silver fir growth in climatic marginal sites. Silvicultural practices and adaptive management should rely on selection and planting of forest reproductive material with high drought resilience in current and future reforestation programs.

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“…Further knowledge transfer on provenance choice is important, particularly with regard to climate change (drought tolerance). Provenance trials in combination with tree-ring research can play an important role to understanding drought tolerance (Buras et al 2020). An important policy instrument for promoting cooperation between governments and other actors is the 'Green Deal' (www.greendeals.nl).…”

Section: Priorities For Capacity Building and Researchmentioning

confidence: 99%

Conservation and sustainable use of Forest Genetic Resources for Food and Agriculture : country report of the Netherlands for the Second State of the World’s Forest Genetic Resources for Food and Agriculture

Buiteveld¹,

Copini²,

Hendriks³

2021

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Provenance selection and site conditions determine growth performance of pedunculate oak

Cited by 30 publications

References 52 publications

Thermotherapy and Storage Temperature Manipulations Limit the Production of Reactive Oxygen Species in Stored Pedunculate Oak Acorns

Thermotherapy and Storage Temperature Manipulations Limit the Production of Reactive Oxygen Species in Stored Pedunculate Oak Acorns

Intraspecific Growth Response to Drought of Abies alba in the Southeastern Carpathians

Conservation and sustainable use of Forest Genetic Resources for Food and Agriculture : country report of the Netherlands for the Second State of the World’s Forest Genetic Resources for Food and Agriculture

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