Influence of soil drying on leaf water potential, photosynthesis, stomatal conductance and growth in two black pine varieties

Lebourgeois, François; Levy, Gérard; Aussenac, Gilbert; Clerc, Bernard; Willm, François

doi:10.1051/forest:19980302

Cited by 61 publications

(38 citation statements)

References 26 publications

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“…nigra stands from central mountains of Spain [9] and young trees [20,21]. Physiological studies have found that the net assimilation rate of Pinus nigra sharply decreased when soil dried as a result of an efficient and rapid stomatal control of transpirational water loss (decreasing photosynthate production and carbohydrate storage) [1,27]. Thus, for the Western France, Corsican pine confirmed to be as a drought-sensitive species.…”

Section: Discussionmentioning

confidence: 99%

Climatic signals in earlywood, latewood and total ring width of Corsican pine from western France

Lebourgeois¹

2000

Ann. For. Sci.

130

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-The influence of climatic factors on the growth of Corsican pine, growing at low elevation on acidic well-drained soils in western France, was evaluated by comparing annual earlywood, latewood and total ring indices with monthly temperature and precipitation data collected at Angers over the period . Latewood formation appeared to be more sensitive to climate than earlywood formation. Pointer years analysis and climatic models showed that summer drought was a major limiting-growth factor in the studied area. Extreme growth reductions specially highlighted the effects of low precipitation whereas response functions clearly underlined the importance of temperature. The climatic models accounted for 46%, 37% and 42% of the variability of total ring, earlywood and latewood indices, and suggested that the period of earlywood formation occurred mainly in early spring (May) whereas the growth of the latewood band was maximum in summer (July). Winter photosynthesis and the advance in the timing of the resumption of cambial activity were possible causes of the positive winter temperature correlation with earlywood. A cool and wet spring was also beneficial to growth as it affected the water balance of the trees at the beginning of the growing season. Prior October weather conditions also influenced growth, suggesting a preconditioning of the current year's growth by climate during the previous year. The regional climatic data revealed: no change in precipitation and thermal amplitude between 1950-1997; a significant (α = 0.01) increase in mean annual temperature of 1.1°C, mean annual minimum temperature (1.5°C), mean summer (July-August) temperature (2.2°C) and minimum summer temperature (2.3°C). By increasing summer water stress, a steady rise may induce growth decrease and probably forest decline in the next years. These results should be taken into account when predicting possible responses of Corsican pine plantations to global change Pinus nigra / climate / global change / pointer years / earlywood / latewood / ring width / Corsican pine Résumé -Analyse dendroclimatique du pin laricio de Corse dans l'ouest de la France. L'effet du climat sur la croissance de peuplements de pin laricio de Corse poussant à faible altitude sur des sols acides et bien drainés dans l'ouest de la France a été évalué en comparant la croissance annuelle du bois initial, du bois final et du cerne complet avec les données mensuelles de température et de précipitation collectées à Angers sur la période 1922-1991. La formation du bois final est apparue plus sensible au climat que celle du bois initial. L'analyse des années caractéristiques et des modèles climatiques a montré que la sécheresse estivale jouait un rôle majeur dans les variations inter-annuelles de croissance. Les réductions extrêmes de croissance sont liées aux faibles précipitations tandis que les fonctions de réponse soulignent le rôle de la température. Les modèles climatiques expliquent entre 37 et 46 % de la variabilité inter-annuelle de la croissance selon le compa...

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Section: Discussionmentioning

confidence: 99%

Climatic signals in earlywood, latewood and total ring width of Corsican pine from western France

Lebourgeois¹

2000

Ann. For. Sci.

130

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“…The lack of statistical differences between provenances or varieties of the same species is not surprising [33,59]; it has occurred in comparing species [35]. Appreciable differences in the gas exchange rates between trees and limitations of measuring equipments [14] make difficult the detection of provenance differences.…”

Section: Discussionmentioning

confidence: 99%

Effects of water supply on gas exchange in Pinus pinaster Ait. provenances during their first growing season

2000

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-Gas exchange parameters were monitored during the first growing season on Pinus pinaster young seedlings belonging to six provenances and submitted to two water supply regimes in the open air under cover. Significant differences were found between water supply regimes and measurement dates; sometimes also between provenances. Gas exchange rate responses to needle water potential were similar for all the provenances, and rate changes were only detected as water potential went down to less than -1.3 MPa. The Iberian provenances, in contrast to the Landes, showed a tendency to save water at the end of Spring, which indicates an adaptation to locations with Summer drought. The growth differences between provenances were not expressed in terms of differences in the instantaneous net photosynthetic rate, since this will depend on other factors, such as seedling water status and the time that the measurement was made. However, provenance growth differences may be partially explained by the differences in water use efficiency and nitrogen productivity. maritime pine / early selection / gas exchange parameters Résumé -Effets de l'alimentation en eau sur les échanges gazeux des provenances de Pinus pinaster Ait. au cours de leur première saison de végétation. Les échanges gazeux ont été étudiés au cours de la première saison de végétation de jeunes semis de Pinus pinaster appartenant à six provenances et soumis à deux régimes d'alimentation en eau sous couvert en plein air. Des différences significatives ont été trouvées entre les régimes d'alimentation en eau et les dates de mesures, parfois aussi entre les provenances. Les réponses des taux d'échanges gazeux au potentiel hydrique des aiguilles étaient similaires entre toutes les provenances, et les changements de taux ne furent seulement détectés que lorsque le potentiel hydrique devint inférieur à -1,3 MPa. Les provenances ibériques, contrairement à celles des Landes, montrèrent une tendance à économiser l'eau à la fin du printemps, ce qui indique une adaptation à la situation de sécheresse estivale. Les différences de croissance entre provenances ne se sont pas exprimées en terme de différences de taux nets instantanés de photosynthèse, car cela dépend aussi d'autres facteurs comme le statut hydrique des semis et de l'époque où les mesures ont été effectuées. Cependant, les différences d'accroissements entre provenances peuvent être partiellement expliquées par des différences dans l'efficience d'utilisation de l'eau et de l'azote. pin maritime / sélection précoce / échanges gazeux

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“…Finally, albedo and maximum leaf conductance were estimated from previous research on Black pine [45][46][47]. The list of modified variables of the Brook90 model is provided in the Supplementary Materials (Table S2).…”

Section: Water Balance Model Calculationsmentioning

confidence: 99%

Recent Drought-Induced Vitality Decline of Black Pine (Pinus nigra Arn.) in South-West Hungary—Is This Drought-Resistant Species under Threat by Climate Change?

Móricz

Garamszegi

Rasztovits

et al. 2018

Forests

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This paper analyses the recent recurring dieback and growth decline of Black pine (P. nigra Arn. var austriaca) in the Keszthely mountains of south-west Hungary, and their relations to water deficits due to droughts. These relations were studied in five stands with low soil water storage capacity for the period 1981-2016. The vitality was assessed using 60 tree-ring samples and changes in remotely sensed vegetation activity indices, i.e., the normalized difference vegetation index (NDVI) and the normalized difference infrared index (NDII). Water deficit was estimated by using meteorological drought indices such the standardized precipitation-evapotranspiration index (SPEI) and the forestry aridity index (FAI), as well as the relative extractable water (REW), calculated by the Brook90 hydrological model. Results revealed a strong dependency of annual tree ring width on the amount of water deficit as measured by all the above estimators, with the highest correlation shown by the summer REW. Droughts also showed a long-term superimposed effect on tree growth. NDII seemed to be more sensitive to drought conditions than NDVI. The robust dependency of tree growth on the summer water availability combined with the projected increasing aridity might lead to decreasing growth of Black pine in Hungary towards the end of the century. We thus argue that the suggestion by several papers that Black pine can be a possible substitute species in the Alpine and Mediterranean region in the future should be revisited.

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Influence of soil drying on leaf water potential, photosynthesis, stomatal conductance and growth in two black pine varieties

Cited by 61 publications

References 26 publications

Climatic signals in earlywood, latewood and total ring width of Corsican pine from western France

Climatic signals in earlywood, latewood and total ring width of Corsican pine from western France

Effects of water supply on gas exchange in Pinus pinaster Ait. provenances during their first growing season

Recent Drought-Induced Vitality Decline of Black Pine (Pinus nigra Arn.) in South-West Hungary—Is This Drought-Resistant Species under Threat by Climate Change?

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