Does bulk-needle ?<sup>13</sup>C reflect short-term discrimination?

Brendel, Oliver

doi:10.1051/forest:2001113

Cited by 27 publications

(24 citation statements)

References 25 publications

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“…This relationship is consistent with other results [3] showing that in Scotland, radiation is a major limiting factor for carbon assimilation in Scots pine.…”

Section: Environmental Effects On Needle D 13 Csupporting

confidence: 82%

“…As calculated from gas exchange [3], discrimination against 13 C during primary assimilation in Scots pine needles can vary by up to 9‰, leading to a large range of d 13 C for primary assimilatory products. It has been shown for several species, that the d 13 C of soluble sugars and starch are closely related to gas exchange parameters and that the starch d 13 C is less negative than the d 13 C of soluble sugars [5].…”

Section: Seasonal Variationmentioning

confidence: 99%

“…It has been shown for several species, that the d 13 C of soluble sugars and starch are closely related to gas exchange parameters and that the starch d 13 C is less negative than the d 13 C of soluble sugars [5]. An isotopic mass balance illustrates the plausible influence of leaf starch d 13 C and concentration on bulk d 13 C. Assuming reasonable increases in leaf starch in spring of 15% of needle dry weight (starch in Scots pine needles can rise to values over 25% [12]) and a medium change in starch d 13 C of 5‰ (compared to 9‰ variation observed for instantaneous discrimination [3]), bulk needle d 13 C would change by 5‰´0.15 = 0.75‰ to less negative values. This suggests, that the spring 13 C-enrichment (0.5‰ over that of mature needles) can be reasonably ascribed to the accumulation of starch translocated from the previous year's needles.…”

Section: Seasonal Variationmentioning

confidence: 99%

“…The Farquhar model of photosynthesis [10,11] predicts a linear correlation between d 13 C of primary assimilatory products and the ratio of assimilation rate to stomatal conductance. It has been shown for Scots pine needles that d 13 C calculated from a daily integration of gas exchange parameters using the Farquhar model is reflected to a certain degree by d 13 C of bulk needle material harvested the evening of the same day [3]. The environmental conditions of a needle (e.g.…”

Section: Introductionmentioning

confidence: 99%

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The ?¹³C of Scots pine (Pinus sylvestris L.) needles: spatial and temporal variations

Brendel¹,

Handley²,

Griffiths³

2003

Ann. For. Sci.

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-Spatial variation in carbon isotope composition (d 13 C) within the crown of an individual tree complicates sampling strategies, but a systematic study has allowed constraining factors to be determined. Spatial and temporal variations of the d 13 C of Pinus sylvestris L. needles were investigated on three exposed, south-facing, branches over 17 months (two growing seasons). A positive relationship (about 2‰ m -1 ) was found between needle d 13 C and trunk-needle distance on the branch. Abaxial needles were characterized by less negative d 13 C values (0.5‰) compared with adaxial needles. Both effects were interpreted in terms of branch hydraulic conductivity including the presence of compression wood. A close relationship was found between d 13 C measured in needles and in adjoining branch wood. Correcting the monthly data for spatial variation, a transient increase in needle d 13 C during spring was detected (about 0.6‰), whereas changes in needle d 13 C during summer, autumn and winter were minor and positively related to solar radiation. composition isotopique du carbone / Pinus sylvestris / aiguille / effet de la longueur de la branche / bois de compression

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“…This relationship is consistent with other results [3] showing that in Scotland, radiation is a major limiting factor for carbon assimilation in Scots pine.…”

Section: Environmental Effects On Needle D 13 Csupporting

confidence: 82%

Section: Seasonal Variationmentioning

confidence: 99%

Section: Seasonal Variationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The ?¹³C of Scots pine (Pinus sylvestris L.) needles: spatial and temporal variations

Brendel¹,

Handley²,

Griffiths³

2003

Ann. For. Sci.

Self Cite

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“…Sampling started after dawn and was completed during the morning, so as to minimize variation due to recent assimilation (Brendel, 2001). Leaves of the year were collected from the tips of the seedling's upper third, so that the samples were representative of the yearly growth conditions.…”

Section: Samplingmentioning

confidence: 99%

Genetic variation in seedling water-use efficiency of Patagonian Cypress populations from contrasting precipitation regimes assessed through carbon isotope discrimination

et al. 2012

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Water-use efficiency (WUE) is a physiological parameter that plays a significant role in the evolutionary dynamics of many forest tree species. It can be estimated indirectly through carbon isotope discrimination (Δ). In general, plants of more arid origins have lower values of Δ. In order to study the degree of genetic control of this parameter and the genetic variation in Δ of Patagonian Cypress seedlings, three Argentinean natural populations chosen to represent two contrasting precipitation regimes were sampled in a common garden trial. The dry situation was represented by two neighboring marginal forest patches from the steppe, while the humid condition was represented by a population with 1,200 mm higher mean annual precipitation. Height (H) and Δ were measured in 246 five-year-old seedlings from 41 open-pollinated families. The factor 'family' had a significant effect on both variables; however heritability for Δ was found not to be significant in two out of the three populations. This could be explained by low sample size in one of them and by a real evolutionary effect in the other. An inverse association between H and Δ was verified, which is interpreted as evidence of an adaptation process at the intra-population level. The studied populations were not shown to discriminate carbon isotopes differently; hence evidence of adaptation to current environmental conditions could not be obtained. On the other hand, the arid populations proved to be quite different in terms of genetic variation, which seems to be the consequence of genetic drift and isolation.Key words: Austrocedrus chilensis; differentiation; adaptation; genetic drift. ResumenVariación genética de poblaciones naturales de Ciprés de la Cordillera con regímenes de precipitación contrastados, en la eficiencia del uso del agua de plántulas, a través de la discriminación isotópica del carbono La eficiencia en el uso del agua es un parámetro fisiológico que desempeña un rol significativo en la dinámica evolutiva de muchas especies forestales. Puede estimarse indirectamente a través de la discriminación isotópica del carbono (Δ). En general, las plantas de orígenes más áridos tienen valores de Δ más bajos. Con el propósito de estudiar el grado de control genético de Δ y la variación genética en este parámetro en plántulas de Ciprés de la Cordillera, tres poblaciones naturales elegidas para representar dos regímenes de precipitación contrastados fueron muestreadas en un ensayo de ambiente común. La condición árida estuvo representada por dos fragmentos de bosque esteparios marginales, vecinos entre sí, mientras que la condición húmeda fue representada por una población con una precipitación media anual 1.200 mm superior a la de las áridas. Se midió altura total (H) y Δ en 246 plántulas de 5 años de edad correspondientes a 41 familias de polinización abierta. El factor 'familia' tuvo un efecto significativo en ambas variables; sin embargo, la heredabilidad para Δ no resultó significativa en dos de las tres poblaciones. En una de ellas esto pod...

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The relationship between the stable carbon isotope composition of needle bulk material, starch, and tree rings in Picea abies

et al. 2002

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We investigated the relationship between the δC signal in current-year and 1-year-old needle bulk material, starch extracts, and early- or late-wood in mature spruce trees (Picea abies) to identify the modifying influence of climatic conditions on the different δC signals. Seasonal patterns of δC were determined in total bulk needle material from 1998 to 2000, and in acid soluble starch extracts in 1999 and 2000, and δC values of early- and late-wood were measured for the years 1991-2000. δC of bulk needle material was most enriched in spring with a trend towards depletion in the course of the season. Current-year needles showed a more distinct seasonal pattern in δC compared to 1-year-old needles. Seasonal trends in bulk material and starch were similar, but the highly enriched signal in spring could not be fully explained by the influence of the δC values of starch (weighted with the corresponding starch amounts). δC of starch in 1-year-old needles, and to a lesser extent of current-year needles, correlated with δC of early-wood, indicating a transfer of the isotopic signal. In addition, early-wood δC corresponded weakly to winter precipitation. In the summer, δC of total bulk needle material and starch showed no relation to the late-wood δC signature. Late-wood δC, however, related to global radiation, relative humidity and temperature, with more enriched values corresponding to warmer and drier conditions. We conclude that the signature of early-wood is determined more by biochemical fractionation, e.g. during starch formation, than by climatic conditions, which exert only a minor influence and are reflected in the isotopic signal of late-wood.

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Does bulk-needle ?¹³C reflect short-term discrimination?

Cited by 27 publications

References 25 publications

The ?¹³C of Scots pine (Pinus sylvestris L.) needles: spatial and temporal variations

The ?¹³C of Scots pine (Pinus sylvestris L.) needles: spatial and temporal variations

Genetic variation in seedling water-use efficiency of Patagonian Cypress populations from contrasting precipitation regimes assessed through carbon isotope discrimination

The relationship between the stable carbon isotope composition of needle bulk material, starch, and tree rings in Picea abies

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Does bulk-needle ?13C reflect short-term discrimination?

Cited by 27 publications

References 25 publications

The ?13C of Scots pine (Pinus sylvestris L.) needles: spatial and temporal variations

The ?13C of Scots pine (Pinus sylvestris L.) needles: spatial and temporal variations

Genetic variation in seedling water-use efficiency of Patagonian Cypress populations from contrasting precipitation regimes assessed through carbon isotope discrimination

The relationship between the stable carbon isotope composition of needle bulk material, starch, and tree rings in Picea abies

Contact Info

Product

Resources

About

Does bulk-needle ?¹³C reflect short-term discrimination?

The ?¹³C of Scots pine (Pinus sylvestris L.) needles: spatial and temporal variations

The ?¹³C of Scots pine (Pinus sylvestris L.) needles: spatial and temporal variations