Compensation processes of Aleppo pine ( Pinus halepensis  Mill.) to ozone exposure and drought stress

Inclán, R.; Gimeno, B.S.; Dizengremel, Pierre; Sánchez, Miguel Ángel Saz

doi:10.1016/j.envpol.2005.01.037

Cited by 47 publications

(17 citation statements)

References 24 publications

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“…The Δ decreases observed in O 3 -treated needles have been detected before (Matyssek et al 1992;Saurer et al 1995;Gimeno et al 1999;Grams et al 2007) and have been interpreted in accordance with the theory of Farquhar et al (1982) as evidence that exposure to O 3 enhances the relative stomatal limitation of photosynthesis, thereby decreasing time-integrated c i /c a and increasing water use efficiency (WUE, A/E; Saurer et al 1991;Gimeno et al 1999). In this sense, O 3 -treated needles showed reductions in the calculated c i /c a However, gas exchange parameters measured in the present experiment (Inclán et al 2005) showed only slight WUE reductions, which indicated an increase in c i /c a . The calculated c i /c a values do not correspond with the measured values and the model proposed in Eq.…”

Section: Discussionsupporting

confidence: 84%

“…The environmental conditions in the Mediterranean basin reduce stomatal conductance at the time of the highest O 3 levels and promote sclerophylly, volatile organic compounds emission, content, and activity of antioxidants. The pioneer Aleppo pine, which behaves as a drought-avoiding species, have xeromorphic adaptations, low gas exchange rates (Inclán et al 1998(Inclán et al , 2005, and their constitutional and induced ability to tolerate oxidative stress by an active antioxidant pool (Alonso et al 2003). These tolerance and avoidance mechanisms may be of greater importance for Mediterranean vegetation than for vegetation from other biomes.…”

Section: Discussionmentioning

confidence: 98%

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Carbon Isotope Composition, Macronutrient Concentrations, and Carboxylating Enzymes in Relation to the Growth of Pinus halepensis Mill. When Subject to Ozone Stress

Inclán¹,

Gimeno²,

Peñuelas³

et al. 2010

Water Air Soil Pollut

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Section: Discussionsupporting

confidence: 84%

Section: Discussionmentioning

confidence: 98%

Carbon Isotope Composition, Macronutrient Concentrations, and Carboxylating Enzymes in Relation to the Growth of Pinus halepensis Mill. When Subject to Ozone Stress

Inclán¹,

Gimeno²,

Peñuelas³

et al. 2010

Water Air Soil Pollut

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“…For example, a decrease of soil organic matter or clay formation can reduce the CEC and thus the ecosystem's capacity to prevent nutrient losses through leaching during the torrential rainfalls frequent in Mediterranean areas If plants reduce their transpiration rates in response to drought, the amount of those nutrients such as Ca and Mg that depend mainly on mass flow, should decrease. Thus, drought can cause nutrient unbalances in plant by affecting asymmetrically the uptake of different nutrients (Dambrine et al 1992;Yavitt et al 2004;Inclan et al 2005;Hu and Schmidhalter 2005). On the other hand, drought can generate asymmetrical changes among different plant tissues by changing internal remobilization patterns (Wang et al 2005).…”

Section: Introductionmentioning

confidence: 97%

Drought’s impact on Ca, Fe, Mg, Mo and S concentration and accumulation patterns in the plants and soil of a Mediterranean evergreen Quercus ilex forest

2007

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We conducted a 6-year field manipulation drought experiment in an evergreen Quercus ilex forest where we simulated the drought predicted by GCM and ecophysiological models for the coming decades (an average of 15% soil moisture reduction). We thereby tested the hypothesis that enhanced drought will change Ca, Fe, Mg, Mo and S availability, concentrations and accumulation patterns in Mediterranean ecosystems. The strongest effects of drought occurred in the soil. Drought increased the total soil concentrations of S, the soil extract concentrations of Fe, Mg and S, the Mg saturation in the soil exchangeable complex and tended to increase the percentage base saturation of the soil exchangeable complex. These increased soil concentrations were related to a decrease of plant uptake capacity and not to an increase of soil enzyme activity, which in fact decreased under drier conditions. Drought increased leaf Mg concentrations in the three dominant species although only significantly in Quercus ilex and Arbutus unedo (20 and 14%, respectively). In contrast, drought tended to decrease Ca in Phillyrea latifolia (18%) and Ca and Fe concentrations in the wood of all three species. Drought increased Ca and Fe concentrations in the roots of Quercus ilex (26 and 127%). There was a slight general trend to decrease total biomass accumulation of nutrients that depend on water flux such as Mg, Fe and S. This effect was related to a decrease of soil moisture that reduced soil flow, and to a decrease in photosynthetic capacity, sap flow, transpiration and growth, and therefore plant uptake capacity under drought observed in Quercus ilex and Arbutus unedo. On the contrary, drought increased Mo accumulation in aboveground biomass in Phillyrea latifolia and reduced Mo accumulation in Arbutus unedo by reducing growth and wood Mo concentrations (51%). Phillyrea latifolia showed a great capacity to adapt to drier conditions, with no decrease in growth, an increase of Mo uptake capacity and a decrease in leaf Ca concentration, which was related to a decrease in transpiration under drought. The results indicate asymmetrical changes in species capacity to accumulate these elements, which are likely to produce changes in inter-specific competitive relations among dominant plant species and in their nutritional quality as food sources. The results also indicate that drought tended to decrease nutrient content in aboveground biomass, mainly through the decrease in growth and transpiration of the most sensitive species and caused an increase in the availability of these nutrients in soil. Thus, drought decreased the ecosystem's capacity to retain Mg, Fe and S, facilitating their loss in torrential rainfalls.

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“…The nutrient content of aboveground biomass, mainly in leaves, tends to decrease with drought (Sardans et al 2008a;b), with the exception of K that increases in some aboveground tissues of some plant species (Sardans and Peñuelas 2007a;Sardans et al 2008g). Drought increases the C:N and C:P ratios of Mediterranean shrubs and trees, associated with a protective and conservative mechanism (Inclan et al 2005;Sardans et al 2008b, c, d;Matías et al 2011) and with sclerophylly and increases in lignin content (Bussotti et al 2000;Sardans et al 2006a). Drought enhances the allocation of N to the root system, which increases the capacity to absorb water (Sardans et al 2008a;.…”

Section: Droughtmentioning

confidence: 99%

Plant-soil interactions in Mediterranean forest and shrublands: impacts of climatic change

2013

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Background In the Mediterranean climate, plants have evolved under conditions of low soil-water and nutrient availabilities and have acquired a series of adaptive traits that, in turn exert strong feedback on soil fertility, structure, and protection. As a result, plant-soil systems constitute complex interactive webs where these adaptive traits allow plants to maximize the use of scarce resources.

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Compensation processes of Aleppo pine ( Pinus halepensis Mill.) to ozone exposure and drought stress

Cited by 47 publications

References 24 publications

Carbon Isotope Composition, Macronutrient Concentrations, and Carboxylating Enzymes in Relation to the Growth of Pinus halepensis Mill. When Subject to Ozone Stress

Carbon Isotope Composition, Macronutrient Concentrations, and Carboxylating Enzymes in Relation to the Growth of Pinus halepensis Mill. When Subject to Ozone Stress

Drought’s impact on Ca, Fe, Mg, Mo and S concentration and accumulation patterns in the plants and soil of a Mediterranean evergreen Quercus ilex forest

Plant-soil interactions in Mediterranean forest and shrublands: impacts of climatic change

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