Sacrificing growth and maintaining a dynamic carbohydrate storage are key processes for promoting beech survival under prolonged drought conditions

Chuste, Pierre-Antoine; Maillard, Pascale; Bréda, Nathalie; Levillain, Joseph; Thirion, Erwin; Wortemann, Rémi; Massonnet, Catherine

doi:10.1007/s00468-019-01923-5

Cited by 40 publications

(28 citation statements)

References 82 publications

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“…New Phytologist restrict production and belowground allocation of carbohydrates (Hartmann et al, 2013;Klein et al, 2014;Chuste et al, 2020;Ji et al, 2020) will also decrease the P uptake of mature trees. In conclusion, our study emphasises that P uptake and metabolism in young forest trees and associated ectomycorrhizas are more vulnerable to a shortage of carbohydrates than the associated soilresiding processes.…”

Section: Researchmentioning

confidence: 99%

Carbohydrate depletion in roots impedes phosphorus nutrition in young forest trees

et al. 2021

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 Nutrient imbalances cause the deterioration of tree health in European forests, but the underlying physiological mechanisms are unknown. Here, we investigated the consequences of decreasing root carbohydrate reserves for phosphorus (P) mobilization and uptake by forest trees.  In P-rich and P-poor beech (Fagus sylvatica) forests, naturally grown, young trees were girdled and used to determine root, ectomycorrhizal and microbial activities related to P mobilization in the organic layer and mineral topsoil in comparison with those in nongirdled trees.  After girdling, root carbohydrate reserves decreased. Root phosphoenolpyruvate carboxylase activities linking carbon and P metabolism increased. Root and ectomycorrhizal phosphatase activities and the abundances of bacterial genes catalysing major steps in P turnover increased, but soil enzymes involved in P mobilization were unaffected. The physiological responses to girdling were stronger in P-poor than in P-rich forests. P uptake was decreased after girdling. The soluble and total P concentrations in roots were stable, but fine root biomass declined after girdling.  Our results support that carbohydrate depletion results in reduced P uptake, enhanced internal P remobilization and root biomass trade-off to compensate for the P shortage. Since reductions in root biomass render trees more susceptible to drought, our results link tree deterioration with disturbances in the P supply as a consequence of decreased belowground carbohydrate allocation.

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Section: Researchmentioning

confidence: 99%

Carbohydrate depletion in roots impedes phosphorus nutrition in young forest trees

et al. 2021

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“…How these extreme events will affect ecosystem functions is a key issue for climatologists, ecologists and modelers from IPCC (IPCC, 2014). In this regard, perennial plants, and especially trees, which are keystones structuring many ecosystems, sheltering biodiversity and being an important carbon stock, are the most likely to be affected by an increased exposure to abiotic constraints, even though they may not reach the lethal threshold at once (Chuste et al, 2019). An accurate assessment of the emerging risks and their impacts on the physiology of trees is therefore urgently needed to predict dynamics of forest ecosystems and ultimately their influence on the water and carbon cycles at the global scale.…”

Section: Introductionmentioning

confidence: 99%

Interaction of drought and frost in tree ecophysiology: rethinking the timing of risks

Charrier

Martin‐StPaul

Damesin

et al. 2021

Annals of Forest Science

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In temperate, boreal and alpine areas, the edges of plant distribution are strongly affected by abiotic constraints. For example, heat waves and drought are major constraints at low latitude and elevation while cold and frost are key factors at high latitude and elevation. Over the next few decades, climate variability is expected to increase, enhancing the probability of extreme events and thus the potential stress imposed by abiotic constraints. Moreover, the likelihood of co-occurring and successive constraints, such as drought and frost, could increase in parallel. It is likely that initial exposure to a first constraint would affect the vulnerability to a subsequent one. Three integrative physiological processes, namely water status, carbon status and the timing of phenological stages, are crucial to understanding how trees will respond to these stress factors. Although these processes have largely been studied alone, in response to a single constraint, their interaction has rarely been investigated. In this paper, we have examined how water and carbon status interact with the growth cycle and affect both the vulnerability and the exposure to climatic constraints via two different focuses: (i) How would the interaction of frost and drought constraints modulate the vulnerability to a subsequent constraint? (ii) How vulnerability to a given constraint and phenology interact? In the light of numerous papers, we suggest that the interaction between frost and drought constraints should in the short-term influence water status and, in the longer term, the carbon status, both consequently affecting further vulnerability, potentially leading to a decline. This vulnerability can also be modulated by a shift in the annual phenological cycle induced by a previous constraint. Furthermore, we have identified significant gaps of knowledge in the ecophysiological tree response to interacting stresses based on three major points: (i) the spatio-temporal variation in carbohydrate composition, fluxes and allocation in relation to environmental drivers, (ii) the spatio-temporal variation in water content, water and osmotic potentials, (iii) the modulation of phenological processes in response to stress. This framework can help to improve the current process based models and to identify interactions that needs to be better described in order to obtain a more quantitative and dynamic view of drought and frost vulnerabilities integrating the life history of the individual plant.

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“…Other associated SNPs were located close to some genes in carbohydrates, amino acids, and photosynthesis pathways. Some modifications in carbohydrate stock were important to maintain plant life in stress conditions (Chuste et al 2019;Cui et al 2015). A SNP was located at the upstream of β-gal gene.…”

Section: Discussionmentioning

confidence: 99%

Genomewide SNP marker identification associated with drought tolerance in oil palm

Yono¹,

Nugroho²,

Tanjung³

et al. 2021

Biodiversitas

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Abstract. Yono D, Nugroho YA, Tanjung ZA, Utomo C, Liwang T. 2021. Genomewide SNP marker identification associated with drought tolerance in oil palm. Biodiversitas 22: 3138-3144. Drought stress is one of the abiotic stresses that frequently occurred in the oil palm plantation and has a negative impact on fresh fruit bunch (FFB) production. Therefore, drought-tolerant palms are essential to be selected to mitigate this challenge. In Indonesia, several oil palm plantation areas have a dry climate, such as Lampung province. Distinct yield performance palms were identified from well-recorded agronomic trials in these areas, where the palms are frequently exposed to drought stresses every year and lead them to suffer from water deficit response. Group of high and low-yielding palms was selected based on FFB production of each palm for at least ten constitutive years. The double digest restriction amplified DNA (ddRAD) genotyping methods were used to capture the Single Nucleotide Polymorph (SNP) variant from pools of sample association datasets. At least, 538k SNPs were identified from these pooled datasets. A bulked segregant analysis with a Case-Control approach was implemented to screen the contrast SNP profiles between both pools. A total of 56 association signals was selected from sequential filtering. These SNP sites are located in 21 genes. Further SNP validation and phenotypic verification are necessary to obtain SNPs marker for drought-tolerant palm selections.

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Sacrificing growth and maintaining a dynamic carbohydrate storage are key processes for promoting beech survival under prolonged drought conditions

Cited by 40 publications

References 82 publications

Carbohydrate depletion in roots impedes phosphorus nutrition in young forest trees

Carbohydrate depletion in roots impedes phosphorus nutrition in young forest trees

Interaction of drought and frost in tree ecophysiology: rethinking the timing of risks

Genomewide SNP marker identification associated with drought tolerance in oil palm

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