Interactive responses of Quercus suber L. seedlings to light and mild water stress: effects on morphology and gas exchange traits

Puértolas, Jaime; Pardos, Marta; Clavijo, Miguel; Aranda, Ismael; Pardos, J.A.

doi:10.1051/forest:2008044

Cited by 20 publications

(14 citation statements)

References 45 publications

(42 reference statements)

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“…Drought significantly decreased biomass accumulation in the two P. cathayana populations, similarly as previously reported for P. cathayana and other plants species (Anyia and Herzog, 2004;Li and Wang, 2003;Puértolas et al, 2008). Also for RWC, a significant decrease due to drought was observed.…”

Section: The Growth and Physiological Responses As Affected By Droughtsupporting

confidence: 74%

“…However, UV-B radiation has been reported to alleviate drought stress of plants due to changes in epidermal anatomy (Petropoulou et al, 1995) and increases in carbon assimilation (Sullivan and Teramura, 1989). Meanwhile, interactive responses of Quercus suber L. seedlings to light and moderate water stress have been reported by Puértolas et al (2008). Studies on the combined effects of UV-B radiation and drought stress on trees have been conducted in some species, e.g., Mediterranean pines (Pinus pinea L.) (Petropoulou et al, 1995), olive (Olea europaea L.) (Noguės and Baker, 2000), Douglas fir (Pseudotsuga menziesii Franco) (Poulson et al, 2002) and willows (Salix myrsinifolia L.) (Turtola et al, 2006), and it appears that species differ in their responses to multiple stress factors.…”

Section: Introductionmentioning

confidence: 99%

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Intraspecific variation in drought response of Populus cathayana grown under ambient and enhanced UV-B radiation

Duan²,

Zhang³

et al. 2009

Ann. For. Sci.

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Keywords:carbon nitrogen ratio / photosynthetic nitrogen use efficiency / Populus cathayana / ultraviolet-b radiation / water use efficiency Abstract • The effects of drought, enhanced UV-B radiation and their combination on plant growth and physiological traits were investigated in a greenhouse experiment in two populations of Populus cathayana Rehder originating from high and low altitude in south-west China.• In both populations, drought significantly decreased biomass accumulation and gas exchange parameters, including net CO 2 assimilation rate (A), stomatal conductance (g s ), transpiration rate (E) and photosynthetic nitrogen use efficiency (PNUE). However, instantaneous water use efficiency (WUE i ), transpiration efficiency (WUE T ), carbon isotope composition (δ 13 C) and nitrogen (N) content, as well as the accumulation of soluble protein, UV-absorbing compounds and abscisic acid (ABA) significantly increased in response to drought. On the other hand, cuttings from both populations, when kept under enhanced UV-B radiation, showed very similar changes, as under drought, in all above-mentioned parameters.• Compared with the low altitude population, the high altitude population was more tolerant to drought and enhanced UV-B, as indicated by the higher level of biomass accumulation, gas exchange, water-use efficiency, ABA concentration and UV-absorbing compounds.• After one growing season of exposure to different UV-B levels and watering regimes, the decrease in biomass accumulation and gas exchange, induced by drought, was more pronounced under the combination of UV-B and drought. Significant interactions between drought and UV-B were observed in WUE i , WUE T , δ 13 C, soluble protein, UV-absorbing compounds, ABA and in the leaf and stem N, as well as in the leaf and stem C:N ratio.• Our results showed that UV-B acts as an important signal allowing P. cathayana seedlings to respond to drought and that the combination of drought and UV-B may cause synergistically detrimental effects on plant growth. Mots-clés :rapport carbone / azote / efficience photosynthétique d'utilisation de l'azote / Populus cathayana / rayonnement UV-B / efficience d'utilisation de l'eau Résumé -Variations intra-spécifiques de la réponse à la sécheresse de Populus cathayana sous atmosphère ambiante ou sous un rayonnement UV-B accru.• Les effets d'une sécheresse, d'une augmentation du rayonnement UV-B et de leur combinaison ont été étudiés sur la croissance et les caractéristiques physiologiques de plants de deux populations de Populus cathayana Rehder originaires de haute et basse altitude dans le sud-ouest de la Chine.• Dans les deux populations, la sécheresse a réduit de manière significative l'accumulation de biomasse et les échanges gazeux foliaires, y compris l'assimilation nette (A) de CO 2 , la conductance stomatique (g s ), la transpiration (E) et l'efficience photosynthétique d'utilisation de l'azote (PNUE). Toutefois, l'efficience instantanée d'utilisation de l'eau (WUE i ), l'efficience de transpiration (WUE T ), la com...

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Section: The Growth and Physiological Responses As Affected By Droughtsupporting

confidence: 74%

Section: Introductionmentioning

confidence: 99%

Intraspecific variation in drought response of Populus cathayana grown under ambient and enhanced UV-B radiation

Duan²,

Zhang³

et al. 2009

Ann. For. Sci.

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“…Our results are consistent with some species studied by Sack (2004), such as Crataegus monogyna, Viburnum lantana and Viburnum opulus. The orthogonal result about the interaction of drought and shade has also been reported in some other species from both morphological and physiological aspects (Sack and Grubb 2002;Sack 2004;Feng and Li 2007;Puértolas et al 2008). …”

Section: Interaction Of Drought and Shadementioning

confidence: 72%

Morphological response of Vitex negundo var. heterophylla and Ziziphus jujuba var. spinosa to the combined impact of drought and shade

Wang

Liu

et al. 2012

Agroforest Syst

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Light and soil moisture availability are two important abiotic factors influencing plant growth in an agroforestry system. Different soil moisture and light treatments were applied to examine the combined impact of drought and shade on the morphological plasticity of Vitex negundo var. heterophylla (Chinese chastetree) and Ziziphus jujuba var. spinosa (Spine jujube). We found that the interaction of light and soil moisture was orthogonal in the two species. V. negundo captured irradiance efficiently with relatively long petiole and petiolule, while Z. jujuba maintained higher branches to absorb light than V. negundo. Compared to the seedlings under full sunlight, the palmately compound leaves of V. negundo under low light showed larger specific leaf area (SLA), lower ratio of leaflet length to width and higher leaf mass ratio (leaf biomass to total biomass); in contrast, the simple leaves of Z. jujuba under low light showed larger SLA and ratio of leaf length to petiole length. In both species, drought reduced the branch number, mean internode length of stem, and increased root mass ratio (root biomass to total biomass), but leaf morphology showed little variation to the decreased soil moisture. Between the two species, V. negundo is more shade-tolerant, while Z. jujuba is more droughttolerant. In an alley cropping system, the spacing can be smaller in the V. negundo-crop system than the Z. jujuba-crop system when soil moisture is adequate. However, the V. negundo-crop system should be managed with more caution under the soil moisture limited conditions.

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“…4A). This response may correspond to that of cork oak (Quercus suber L.) seedlings, in which increased specific leaf area associated with shading under water limiting conditions resulted in equivalent biomass production despite reductions in instantaneous photosynthetic rates (Puértolas et al, 2008). In addition, N and carbohydrate reserves are essential for new growth development before significant root uptake and photosynthesis (Salifu et al, 2008;Sloan and Jacobs, 2008).…”

Section: Root Volume Alters Seedling Physiology and Growth Responsesmentioning

confidence: 99%

Sensibilité à la sécheresse et reprise des semis transplantés de Quercus rubra en relation avec la morphologie racinaire

2009

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Keywords:gas exchange / northern red oak / root growth / transplant shock / xylem water potential Abstract • Transplant shock, implicated by depressed seedling physiological status associated with moisture stress immediately following planting, limits early plantation establishment. Large root volume (Rv) has potential to alleviate transplant shock because of higher root growth potential and greater access to soil water.• We investigated impacts of drought and transplant Rv on photosynthetic assimilation (A), transpiration (E), stomatal conductance (g s ), predawn leaf xylem water potential (Ψ L ), and growth of northern red oak (Quercus rubra L.) seedlings to explain mechanisms associated with susceptibility to transplant shock. One year-old barerooot seedlings were graded into four Rv categories and either well watered or subjected to drought consisting of low, medium, or high moisture stress by discontinuing irrigation at 22-day intervals for 3 months. Thereafter, all treatments were re-watered to examine recovery.• Transplant shock was signified by reduced A, E, g s , and Ψ L , which generally increased with increasing moisture stress and Rv. Physiological status improved during recovery, though stress was still evident in seedlings exposed to medium or high moisture stress and in larger Rv seedlings. Growth declined with increasing moisture stress but was generally similar among Rv treatments, likely reflecting greater A at the whole plant level and/or reliance upon stored reserves in large Rv seedlings.• The most effective drought avoidance mechanisms were root growth, stomatal regulation, reduced leaf area, and higher growth allocation to roots relative to shoots. Our results suggest that large initial Rv does not enhance drought avoidance during the first season after transplant in northern red oak seedlings. Mots-clés :échanges gazeux / chêne rouge / croissance racinaire / choc de transplantation / potentiel hydrique xylémique Résumé -Sensibilité à la sécheresse et reprise des semis transplantés de Quercus rubra en relation avec la morphologie racinaire.• Le choc de transplantation, lié à l'état physiologique déprimé des plants associé à un stress hydrique, immédiatement après la plantation, limite le début de l'installation des plants. Un important volume racinaire (Rv) a le potentiel d'atténuer le choc de transplantation en raison du fort potentiel de croissance racinaire et d'un meilleur accès à l'eau du sol. Nous avons étudié les impacts de la sécheresse et des transplants Rv sur l'assimilation photosynthé-tique (A), la transpiration (E), la conductance stomatique (g s ), le potentiel hydrique de base (Ψ L ), et la croissance des plants de chêne rouge (Quercus rubra L.) pour expliquer les mécanismes associés à la sensibilité à un choc de transplantation. Des plants de un an à racines nues ont été classés en quatre catégories Rv et soit bien arrosés, ou soumis à une sécheresse, consistant à un faible, moyen ou fort stress hydrique en cessant l'irrigation à 22 jours d'intervalle(27, 49 et 72 après la ...

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Interactive responses of Quercus suber L. seedlings to light and mild water stress: effects on morphology and gas exchange traits

Cited by 20 publications

References 45 publications

Intraspecific variation in drought response of Populus cathayana grown under ambient and enhanced UV-B radiation

Intraspecific variation in drought response of Populus cathayana grown under ambient and enhanced UV-B radiation

Morphological response of Vitex negundo var. heterophylla and Ziziphus jujuba var. spinosa to the combined impact of drought and shade

Sensibilité à la sécheresse et reprise des semis transplantés de Quercus rubra en relation avec la morphologie racinaire

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