Winter nitrate uptake by the temperate deciduous treeQuercus serrata

Ueda, Miki; Mizumachi, Eri; Tokuchi, Naoko

doi:10.1007/s10310-010-0219-4

Cited by 12 publications

(8 citation statements)

References 32 publications

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“…in the absence of leaves), as already shown in Japan oak (Ueda et al, 2010). However, in our case, N soil uptake was limited by low soil temperature, which affected the mineralization rate and root activity, since the 15 N recovered from roots slightly decreased between October 28 and December 2 (5.5 to 4 %) and then declined to 1.75 % between 2 December and 8 April.…”

Section: N Dynamics In Soil-tree Systems During the First Leafy Seasonsupporting

confidence: 78%

“…When soil (and hence spring N uptake) was labelled (L 3 ) at the beginning of March, a month later most of the 15 N was recovered from microbial biomass and rhizospheric soil (81 %), but a small proportion of 15 N was recovered from the fine roots (1.5 %). The latter demonstrated a small N uptake before budburst, as has previously been observed in Japan oak (Ueda et al, 2010). This early N uptake from the soil could be related to sessile oak's hydraulic properties.…”

Section: N Dynamic In Soil Tree System the Following Springsupporting

confidence: 73%

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Contribution of previous year's leaf N and soil N uptake to current year's leaf growth in sessile oak

Bazot¹,

Fresneau²,

Damesin³

et al. 2016

Biogeosciences

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Abstract. The origin of N which contributes to the synthesis of N reserves of in situ forest trees in autumn and to the growth of new organs the following spring is currently poorly documented. To characterize the metabolism of various possible N sources (plant N and soil N), six distinct 20-yearold sessile oaks were 15 N labelled by spraying 15 NH 15 4 NO 3 : (i) on leaves in May, to label the N pool remobilized in the autumn for synthesis of reserves, (ii) on soil in the autumn, to label the N pool taken up from soil and (iii) on soil at the beginning of the following spring, to label the N pool taken up from soil in the spring. The partitioning of 15 N in leaves, twigs, phloem, xylem, fine roots, rhizospheric soil and microbial biomass was followed during two growing seasons. Results showed a significant incorporation of 15 N into the soiltree system; more than 30 % of the administered 15 N was recovered. Analysis of the partitioning clearly revealed that in autumn, roots' N reserves were formed from foliage 15 N (73 %) and to a lesser extent from soil 15 N (27 %). The following spring, 15 N used for the synthesis of new leaves came first from 15 N stored during the previous autumn, mainly from 15 N reserves formed from foliage (95 %). Thereafter, when leaves were fully expanded, 15 N uptake from the soil during the previous autumn and before budburst contributed to the formation of new leaves (60 %).

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Section: N Dynamics In Soil-tree Systems During the First Leafy Seasonsupporting

confidence: 78%

Section: N Dynamic In Soil Tree System the Following Springsupporting

confidence: 73%

Contribution of previous year's leaf N and soil N uptake to current year's leaf growth in sessile oak

Bazot¹,

Fresneau²,

Damesin³

et al. 2016

Biogeosciences

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show abstract

“…4). Previous studies have also found that N reserves contribute significantly to leaf expansion in young trees: in white birch (Wendler and Millard, 1996), sycamore maple (Millard and Proe, 1991), Japan oak (Ueda et al, 2009), pedunculate oak (Vizoso et al, 2008) and sessile oak (El Zein et al, 2011a).…”

Section: N Dynamic In Soil Tree System the Following Springmentioning

confidence: 88%

Contribution of previous year’s leaf N and soil N uptake to current year’s leaf growth in sessile oak

Bazot¹,

Fresneau²,

Damesin³

et al. 2016

Preprint

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Abstract. The origin of the N which contributes to the synthesis of N reserves of in situ forest trees in autumn, and to the growth of new organs the following spring, is currently poorly documented. To characterize the metabolism of various possible N sources (plant N and soil N), six distinct 20 year-old sessile oaks were 15N labelled by spraying 15NH415NO3: (i) on leaves in May, to label the N pool remobilized in the autumn for synthesis of reserves; (ii) on soil in the autumn, to label the N pool taken up from soil; (iii) on soil at the beginning of the following spring, to label the N pool taken up from soil in the spring. The partitioning of 15N in leaves, twigs, phloem, xylem, fine roots, rhizospheric soil and microbial biomass was followed during two growing seasons. Results showed a significant incorporation of 15N in the soil-tree system; more than 30 % of the administered 15N was recovered. Analysis of the partitioning clearly revealed that in autumn, roots&#8217; N reserves were formed from foliage 15N (73 %) and to a lesser extent from soil 15N (27 %). The following spring, 15N used for the synthesis of new leaves came first from 15N stored during the previous autumn, mainly from 15N reserves formed from foliage (95 %). Thereafter, when leaves were fully expanded, 15N uptake from soil during the previous autumn and before budburst contributed to the formation of new leaves (60 %).

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“…The assimilation of NO 3 --N is an energy consuming process (Bloom et al 1992). When excess light energy is available beyond that required for carbon assimilation, it may be used for New information on plant physiological performance during winter, such as photosynthesis (Miyazawa andKikuzawa 2004, Saarinen et al 2016) and N use (Koyama et al 2008, Onipchenko et al 2009, Ueda et al 2010) is relevant to current considerations of recent climate change (Makoto et al 2014, Sanders-Demott andTempler 2017). The effects have generally been considered in terms of the direct influence of higher temperatures, changes in habitat availability, and extensions of plant growth periods (Walther et al 2002, Cleland et al 2007, Bokhorst et al 2008, Miller-Rushing and Primack 2008, Polgar and Primack 2011.…”

Section: Ecological Implicationsmentioning

confidence: 99%