Drought effects on water relations in beech: The contribution of exchangeable water reservoirs

Betsch, Pauline; Bonal, Damien; Bréda, Nathalie; Montpied, Pierre; Peiffer, Marianne; Tuzet, Andrée; Granier, André

doi:10.1016/j.agrformet.2010.12.008

Cited by 65 publications

(56 citation statements)

References 67 publications

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“…This compares with reported values of 40 to 80 % with different species and in different habitats (Leuzinger et al, 2005;Gartner et al, 2009;Betsch et al, 2011). During our three-year study, average cumulative Ts values during a whole growing season were in the range 175-290 mm.…”

Section: Water Budget At Stand Scalesupporting

confidence: 67%

Rainfall pattern greatly affects water use by Mongolian Scots pine on a sandy soil, in a semi-arid climate

Dang

Zhang

Yang

et al. 2017

Preprint

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Abstract. We report new information on tree water use by Mongolian Scots pine (Pinus sylvestris var. mongolica) growing on a sandy soil, in a region characterised by an erratic rainfall pattern. Measurements were made over three successive years 10 of contrasting annual rainfall -a wet year (2013), a dry year (2014), and a second dry year (2015). The result was the development of worsening levels of drought year by year. Over the three years, sap flux density (Js) was measured at individual tree level in up to 25 trees. The sap flux density values were up-scaled to estimate tree water use at plot level (Ts). Our measurements follow forest plot response to increasing levels of drought which developed over a three-year period as soil moisture conditions gradually worsened from wet, to moderate-drought, to severe-drought, to extreme-drought, in response to the dynamics of a values decreasing by 5-46% in response to moderate drought, by 48-62% in response to severe drought and by 65% in response to extreme drought. Upon release of moderate drought by heavy rainfall in 2013, daily Ts recovered completely. However, under the severe and extreme droughts in the subsequent dry years, recovery of Ts following heavy rainfall was incomplete (57-58%). Our results highlight the negative effects of water stress on the growth of mature forest trees, in a sandy soil, in a climate characterised by large intra-and inter-annual variances in rainfall. When the erratic rainfall and sandy soil were 25 also coupled with a declining groundwater table, the result was tree water use fluctuated widely over quite short time scales (months or weeks). Overall, our findings account for the observed premature degradation of these MP plantations in terms of an eco-hydrological perspective.

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Section: Water Budget At Stand Scalesupporting

confidence: 67%

Rainfall pattern greatly affects water use by Mongolian Scots pine on a sandy soil, in a semi-arid climate

Dang

Zhang

Yang

et al. 2017

Preprint

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“…Infected drought-stressed plants exhibited higher water contents compared with noninfected plants, and suppression of pathogen-induced de novo xylem formation reduces this protective effect; therefore, we hypothesize that the VL43-induced hyperplasia increases the water storage capacity of leaves. To our knowledge, this phenomenon has only been described for perennial plants so far (Scholz et al, 2008;Betsch et al, 2011).…”

Section: Pathogen-induced De Novo Xylem Formation Improves the Water mentioning

confidence: 99%

Verticillium Infection Triggers VASCULAR-RELATED NAC DOMAIN7–Dependent de Novo Xylem Formation and Enhances Drought Tolerance in Arabidopsis

et al. 2012

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The soilborne fungal plant pathogen Verticillium longisporum invades the roots of its Brassicaceae hosts and proliferates in the plant vascular system. Typical aboveground symptoms of Verticillium infection on Brassica napus and Arabidopsis thaliana are stunted growth, vein clearing, and leaf chloroses. Here, we provide evidence that vein clearing is caused by pathogen-induced transdifferentiation of chloroplast-containing bundle sheath cells to functional xylem elements. In addition, our findings suggest that reinitiation of cambial activity and transdifferentiation of xylem parenchyma cells results in xylem hyperplasia within the vasculature of Arabidopsis leaves, hypocotyls, and roots. The observed de novo xylem formation correlates with Verticillium-induced expression of the VASCULAR-RELATED NAC DOMAIN (VND) transcription factor gene VND7. Transgenic Arabidopsis plants expressing the chimeric repressor VND7-SRDX under control of a Verticillium infectionresponsive promoter exhibit reduced de novo xylem formation. Interestingly, infected Arabidopsis wild-type plants show higher drought stress tolerance compared with noninfected plants, whereas this effect is attenuated by suppression of VND7 activity. Together, our results suggest that V. longisporum triggers a tissue-specific developmental plant program that compensates for compromised water transport and enhances the water storage capacity of infected Brassicaceae host plants. In conclusion, we provide evidence that this natural plant-fungus pathosystem has conditionally mutualistic features.

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“…The impact of drought on plant transpiration is an up-to-date question (Betsch et al, 2011;Huang et al, 2009;Klein et al, 2014), but the attempt to examine the correlations between transpiration rate of tree species and drought indices is relatively novel. Due to the high level of resistance and resilience of tree species against drought (with regard to the physiognomy of tree species starting from "water management" up to the depth of the rooting system), the expected effect of soil water shortage became evident only after several consecutive weeks characterised by the continuous meteorological drought.…”

Section: Sap Flow In Relation To Spimentioning

confidence: 99%

Identifying the relationships of climate and physiological responses of a beech forest using the Standardised Precipitation Index: a case study for Slovakia

Vido

Střelcová

Nalevanková

et al. 2016

Journal of Hydrology and Hydromechanics

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The paper presents relationship between the Standardised Precipitation Index (SPI) and physiological responses of individual trees in a beech stand using an example of an experimental plot in Bienska valley (Zvolen, Slovakia). SPI is a widely used tool for monitoring both short-term and long-term droughts, and for the assessments of drought impacts on agriculture. Due to the complex ecosystem bonds, monitoring of drought in forests often requires a sophisticated technological approach. The aim of the paper was to correlate the SPI on the physiological responses of trees that were recorded during the performed physiological research (sap flow, and stem circumference increment) at the site in the growing seasons (May to September) of the years 2012-2014. The results revealed a relationship between the index and the physiological responses, although the problem with the impact of other environmental factors has also come up. The secondary correlation, in which soil water potential that significantly affects physiological responses of forest tree species was used as a dependent variable, showed a tighter relationship with the SPI. We found the highest correlation between the soil water potential and the values of SPI aggregated for five weeks. This indicates that the beech forest has a five week resistance to drought stress. The results also enable simple monitoring of the initiation of the drought stress by applying SPI for five weeks.

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Drought effects on water relations in beech: The contribution of exchangeable water reservoirs

Cited by 65 publications

References 67 publications

Rainfall pattern greatly affects water use by Mongolian Scots pine on a sandy soil, in a semi-arid climate

Rainfall pattern greatly affects water use by Mongolian Scots pine on a sandy soil, in a semi-arid climate

Verticillium Infection Triggers VASCULAR-RELATED NAC DOMAIN7–Dependent de Novo Xylem Formation and Enhances Drought Tolerance in Arabidopsis

Identifying the relationships of climate and physiological responses of a beech forest using the Standardised Precipitation Index: a case study for Slovakia

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