Stomatal Conductance and ABA Concentration in the Xylem Sap of Barley Lines of Contrasting Genetic Origins

Borel, C.; Simonneau, Th.; This, Dominique; Tardieu, Francois F.

doi:10.1071/pp96097

Cited by 38 publications

(27 citation statements)

References 30 publications

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“…In contrast, the behavior of genotype Grimminge was more in line with the anisohydric species, revealing a “risk‐taking” behavior, as the Ψ l decreased to maintain high the g s as SWC decreased or VPD increased over the course of the growing season. Stomatal conductance was controlled through variations on Ψ l , like in other anisohydric species (e.g., sunflower (Tardieu, Lafarge, & Simonneau, 1996; Tardieu & Simonneau, 1998), barley (Borel, Simonneau, This, & Tardieu, 1997) and almond trees (Wartinger, Heilmeier, Hartung, & Schulze, 1990)).…”

Section: Discussionmentioning

confidence: 99%

Genotypic variation in transpiration of coppiced poplar during the third rotation of a short‐rotation bio‐energy culture

et al. 2018

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The productivity of short‐rotation coppice (SRC) plantations with poplar (Populus spp.) strongly depends on soil water availability, which limits the future development of its cultivation, and makes the study of the transpirational water loss particularly timely under the ongoing climate change (more frequent drought and floods). This study assesses the transpiration at different scales (leaf, tree and stand) of four poplar genotypes belonging to different species and from a different genetic background grown under an SRC regime. Measurements were performed for an entire growing season during the third year of the third rotation in a commercial scale multigenotype SRC plantation in Flanders (Belgium). Measurements at leaf level were performed on specific days with a contrasted evaporative demand, temperature and incoming shortwave radiation and included stomatal conductance, stem and leaf water potential. Leaf transpiration and leaf hydraulic conductance were obtained from these measurements. To determine the transpiration at the tree level, single‐stem sap flow using the stem heat balance (SHB) method and daily stem diameter variations were measured during the entire growing season. Sap flow‐based canopy transpiration (E c), seasonal dry biomass yield, and water use efficiency (WUE; g aboveground dry matter/kg water transpired) of the four poplar genotypes were also calculated. The genotypes had contrasting physiological responses to environmental drivers and to soil conditions. Sap flow was tightly linked to the phenological stage of the trees and to the environmental variables (photosynthetically active radiation and vapor pressure deficit). The total E c for the 2016 growing season was of 334, 350, 483 and 618 mm for the four poplar genotypes, Bakan, Koster, Oudenberg and Grimminge, respectively. The differences in physiological traits and in transpiration of the four genotypes resulted in different responses of WUE.

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Section: Discussionmentioning

confidence: 99%

Genotypic variation in transpiration of coppiced poplar during the third rotation of a short‐rotation bio‐energy culture

et al. 2018

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“…Low area of mature leaves will imply a lower water loss by transpiration, which could explain a higher leaf RWC for a given amount of water in the soil. Stomatal conductance could also play a role in RWC maintenance, but no significant differences in stomatal response to soil drying has been yet identified between lines of barley (Borel et al, 1997) or other anisohydric species (J. Wery, unpublished). In preliminary studies, 'Tadmor' proved to have a higher capacity of osmotic adjustment and higher RWC under water deficit, in comparison with 'Er/Apm ' (B. Teulat & D. Rekika, unpubHshed).…”

Section: Discussionmentioning

confidence: 99%

Relationships between relative water content and growth parameters under water stress in barley: a QTL study

et al. 1997

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SUMMARYDrought strongly affects cereal yield in several regions of the world. Plant growth and plant water status in response to soil water deficit play an important role in tolerance to drought and in yield stability. In order to investigate the relationship between plant growth and w^ater relations, 187 barley {Hordeum vulgare L.) recombinant inbred lines from a cross between two Mediterranean varieties, Tadmor and Fr/Apm, were studied in a growth chamber for RWC , number of leaves on the main tiller (NL), number of tillers (NT) and total shoot fresh and dry biomass (TSFM and TSDM). Measurements were made at the beginning of tillering on well watered plants and at a soil moisture content of 14% of field capacity. A negative phenotypic correlation between RWC and growth parameters was obtained in both treatments. Under water stress, a negative genetic correlation was also found between the same characters. QTLs involved in RWC, NL and TSFM variation were positioned on a RFLP-RAPD genetic map. Different DNA regions involved in constitutive and water stress responses were detected. In the stress treatment, one region on chromosome 1 was involved in RWC and NL variation giving a genetic basis to the phenotypic correlations found. Separated map positions were also found for RWC and NL. Epistatic interactions between several QTLs and between QTLs and other markers were detected only in the water stress treatment, suggesting that some chromosomal regions might be involved in the regulation of the expression of the traits under water stress. This work suggested that even if some parameters are strongly correlated, finding QTLs for only one trait is not sufficient to detect all the candidate regions which might be involved in the control of the correlated traits. The results of localization and co-localization of QTLs are physiologically interpreted.

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“…5) show a wider range of leaf water potential for D. viscosa (2.5 MPa) than for S. praecox (0.7 MPa) and B. cordata (1.5 MPa) fitting a better regression of g s versus Y. This may imply that Y fluctuates as soil water availability decreases and acts as a signal to regulate stomatal conductance to avoid dehydration (Comstock and Mencuccini 1998;Hubbard et al 2001) showing probably anisohydric behaviour like that of Prunus persica, the peach (Steinberg et al 1989), Prunus dulcis the almond (Wartinger et al 1990), Glycine max, the soybean (Allen et al 1994), Helianthus annus, the sunflower (Tardieu et al 1996) and barley Hordeum vulgarae (Borel et al 1997).…”

Section: Discussionmentioning

confidence: 95%

Stomatal conductance in a tropical xerophilous shrubland at a lava substratum

Barradas

Ramos-Vázquez

Orozco‐Segovia

2004

International Journal of Biometeorology

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Diurnal variation in leaf stomatal conductance (gs) of three xerophilous species (Buddleia cordata, Senecio praecox and Dodonaea viscosa) was measured over a 10-month period during the dry and wet seasons in a shrubland that is developing in a lava substratum in Mexico. Averaged stomatal conductances were 147 and 60.2 (B. cordata), 145 and 24.8 (D. viscosa) and 142.8 and 14.1 mmol m(-2) s(-1) (S. praecox) during the wet and dry season respectively. Leaf water potential (Psi) varied in a range of -0.6 to -1.2 (S. praecox), -0.6 to -1.8 (B. cordata) and -0.9 to -3.4 MPa (D. viscosa) during the same measurement periods. Stomata were more sensitive to changes in irradiance, air temperature and leaf-air vapour pressure difference in the rainy season than the dry season. Although stomatal responses to Psi were difficult to distinguish in any season (dry or rainy), data for the entire period of measurement showed a positive correlation, stomata tending to open as Psi increased, but there is strong evidence of isohydric behaviour in S. praecox and B. cordata. A multiplicative model relating gs to environmental variables and to Psi accounted for 79%-83% of the variation of gs in three sites (pooled data); however, the performance of the model was poorer (60%-76%) for individual species from other sites not included in the pooled data.

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Stomatal Conductance and ABA Concentration in the Xylem Sap of Barley Lines of Contrasting Genetic Origins

Cited by 38 publications

References 30 publications

Genotypic variation in transpiration of coppiced poplar during the third rotation of a short‐rotation bio‐energy culture

Genotypic variation in transpiration of coppiced poplar during the third rotation of a short‐rotation bio‐energy culture

Relationships between relative water content and growth parameters under water stress in barley: a QTL study

Stomatal conductance in a tropical xerophilous shrubland at a lava substratum

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