Impact of warming and drought on carbon balance related to wood formation in black spruce

Deslauriers, Annie; Beaulieu, Marilène; Balducci, Lorena; Giovannelli, Alessio; Gagnon, Marc; Rossi, Sergio

doi:10.1093/aob/mcu111

Cited by 95 publications

(79 citation statements)

References 53 publications

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“…During the water deficit, C pd of nonirrigated saplings dropped in response to the decrease of soil water availability, reaching the lowest values on DOY 172 (22.7 6 0.2 MPa) and DOY 180 (21.3 6 0.7 MPa) in 2010 and 2011, respectively. One week after the resumption of irrigation, the C pd of irrigated and nonirrigated saplings were similar, showing that the saplings were able to recover an optimal water status after the stress (Balducci et al, 2013;Deslauriers et al, 2014).…”

Section: Experimental Designmentioning

confidence: 87%

“…3). Therefore, the means represent all temperature treatments confounded (for full NSC time series and statistical analyses, see Deslauriers et al, 2014). In cambium, Suc was up to 30 times more abundant than the other NSCs (Fig.…”

Section: Variation In Nscsmentioning

confidence: 99%

“…Suc was the main compound forming the NSC pool in cambium ( Fig. 2; Deslauriers et al, 2014). This sugar is mainly broken down by invertase, forming hexose (Glc and Fru), and by Suc synthase, forming Fru and UDP-Glc (Koch, 2004).…”

Section: The Role Of Available C During Xylogenesismentioning

confidence: 99%

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The Contribution of Carbon and Water in Modulating Wood Formation in Black Spruce Saplings

Deslauriers

Huang

Balducci³

et al. 2016

Plant Physiol.

Self Cite

106

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ORCID IDs: 0000-0003-3830-0415 (J.-G.H.); 0000-0001-5248-9096 (M.B.).Nonstructural carbohydrates (NSCs) play a crucial role in xylem formation and represent, with water, the main constraint to plant growth. We assessed the relationships between xylogenesis and NSCs in order to (1) verify the variance explained by NSCs and (2) determine the influence of intrinsic (tissue supplying carbon) and extrinsic (water availability and temperature) factors. During 2 years, wood formation was monitored in saplings of black spruce (Picea mariana) subjected to a dry period of about 1 month in June and exposed to different temperature treatments in a greenhouse. In parallel, NSC concentrations were determined by extracting the sugar compounds from two tissues (cambium and inner xylem), both potentially supplying carbon for wood formation. A mixed-effect model was used to assess and quantify the potential relationships. Total xylem cells, illustrating meristematic activity, were modeled as a function of water, sucrose, and D-pinitol (conditional r 2 of 0.79). Water availability was ranked as the most important factor explaining total xylem cell production, while the contribution of carbon was lower. Cambium stopped dividing under water deficit, probably to limit the number of cells remaining in differentiation without an adequate amount of water. By contrast, carbon factors were ranked as most important in explaining the variation in living cells (conditional r 2 of 0.49), highlighting the functional needs during xylem development, followed by the tissue supplying the NSCs (cambium) and water availability. This study precisely demonstrates the role of carbon and water in structural growth expressed as meristematic activity and tissue formation.

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Section: Experimental Designmentioning

confidence: 87%

Section: Variation In Nscsmentioning

confidence: 99%

See 1 more Smart Citation

The Contribution of Carbon and Water in Modulating Wood Formation in Black Spruce Saplings

Deslauriers

Huang

Balducci³

et al. 2016

Plant Physiol.

Self Cite

106

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“…A number of studies have associated the within-year dynamics of NSCs in xylem and cambium with xylem increment growth (e.g. Sundberg et al 1993;Deslauriers et al 2009Deslauriers et al , 2014Giovannelli et al 2011;Gruber et al 2013;Simard et al 2013), whereas fewer studies have elucidated the seasonal patterns of phloem NSCs Stasova 2006, 2008;Gruber et al 2013). In addition, few studies have examined the association between within-year phloem production quantities and/or accumulation of primary and secondary (constitutive) metabolites (cf.…”

Section: Introductionmentioning

confidence: 99%

Seasonal variation in formation, structure, and chemical properties of phloem in Picea abies as studied by novel microtechniques

Jyske

Suuronen

Pranovich

et al. 2015

Planta

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Phloem production and structural development were interlinked with seasonal variation in the primary and secondary metabolites of phloem. Novel microtechniques provided new perspectives on understanding phloem structure and chemistry. To gain new insights into phloem formation in Norway spruce (Picea abies), we monitored phloem cell production and seasonal variation in the primary and secondary metabolites of inner bark (non-structural carbohydrates and phenolic stilbene glucosides) during the 2012 growing season in southern and northern Finland. The structure of developing phloem was visualised in 3D by synchrotron X-ray microtomography. The chemical features of developing phloem tissues isolated by laser microdissection were analysed by chemical microanalysis. Within-year phloem formation was associated with seasonal changes in non-structural carbohydrates and phenolic extractive contents of inner bark. The onset of phloem cell production occurred in early and mid-May in southern and northern Finland, respectively. The maximal rate of phloem production and formation of a tangential band of axial phloem parenchyma occurred in mid-June, when total non-structural carbohydrates peaked (due to the high amount of starch). In contrast, soluble sugar content dropped during the most active growth period and increased in late summer and winter. The 3D visualisation showed that the new axial parenchyma clearly enlarged from June to August. Sub-cellular changes appeared to be associated with accumulation of stilbene glucosides and soluble sugars in the newest phloem. Stilbene glucosides also increased in inner bark during late summer and winter. Our findings may indicate that stilbene biosynthesis in older phloem predominantly occurs after the formation of the new band(s) of axial parenchyma. The complementary use of novel microtechniques provides new perspectives on the formation, structure, and chemistry of phloem.

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“…Many reports documented accumulation of free myo-inositol, its isomers and methylated ethers (mainly d-pinitol and d-ononitol) in different plant species under abiotic stresses, like drought (Ahn et al 2011;Sanchez et al 2012;Yates et al 2014), high salinity (Kumari et al 2015;Slama et al 2015), elevated (Deslauriers et al 2014) or lowered temperature (Turner and Pollock 1998;Dauwe et al 2012). The expression of IMT genes seems to be stress up-regulated (Vernon and Bohnert 1992;Sengupta et al 2008).…”

Section: Discussionmentioning

confidence: 99%

The occurrence and accumulation of d-pinitol in fenugreek (Trigonella foenum graecum L.)

et al. 2018

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This article presents changes in concentrations of d-pinitol (and other cyclitols as well as low molecular weight carbohydrates) in vegetative and reproductive organs of fenugreek (Trigonella foenumgraecum L.) during an entire plant growing period. d-Pinitol was the major cyclitol in all tested organs, representing 43-94% of total cyclitols and 2-77% of total soluble carbohydrates. The highest concentration of d-pinitol was found in pods (14-23 mg g −1 of dry weight, DW), lower in leaves and stems (5-20 and 9-10 mg g −1 DW, respectively), and the lowest in maturing seeds (2-5 mg g −1 DW). Although maturing seeds accumulate α-d-galactosides of d-pinitol (galactosyl pinitols, up to 6.6 mg g −1 DW), the major storage sugars were raffinose family oligosaccharides (RFOs, 65.37 mg g −1 DW). Both RFOs and galactosyl pinitols are hydrolyzed during seed germination, releasing sucrose and d-pinitol, respectively. Accumulation of free galactose was not detected. Owing to the high concentration of d-pinitol (up to 23.70 mg g −1 DW) and low concentration of soluble sugars, developing pods seem to be the best source of d-pinitol.

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Impact of warming and drought on carbon balance related to wood formation in black spruce

Abstract: Radial stem growth was reduced during drought due to the mobilization of NSCs for osmotic purposes and due to the lack of cell turgor. Thus plant water status during wood formation can influence the NSCs available for growth in the cambium and xylem.

Cited by 95 publications

References 53 publications

The Contribution of Carbon and Water in Modulating Wood Formation in Black Spruce Saplings

The Contribution of Carbon and Water in Modulating Wood Formation in Black Spruce Saplings

Seasonal variation in formation, structure, and chemical properties of phloem in Picea abies as studied by novel microtechniques

The occurrence and accumulation of d-pinitol in fenugreek (Trigonella foenum graecum L.)

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