Aspen growth is not limited by starch reserves

Wang, Wei; Talide, Loic; Viljamaa, Sonja; Niittylä, Totte

doi:10.1016/j.cub.2022.06.056

Cited by 14 publications

(15 citation statements)

References 52 publications

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“…However, a process as fundamental as bud flush in aspen can occur in the absence of starch (Wang et al, 2022). Therefore, reserve carbohydrate accrual and utilization exhibits plasticity and can proceed through multiple routes.…”

Section: Discussionmentioning

confidence: 99%

“…However, significant diurnal fluctuations in leaf sucrose reserves occur in Populus (Wang et al, 2022, Zhang et al, 2014. Recent evidence suggests that in the absence of starch, other carbohydrates, presumably including sucrose, can provide the reserves needed to sustain new vegetative growth (Wang et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

“…Starch is regulated diurnally (Hartmann & Trumbore, 2016, Noronha et al ., 2018, Klein & Hoch, 2015), and therefore has been the focus of most studies on reserve carbohydrate utilization. However, significant diurnal fluctuations in leaf sucrose reserves occur in Populus (Wang et al ., 2022, Zhang et al ., 2014). Recent evidence suggests that in the absence of starch, other carbohydrates, presumably including sucrose, can provide the reserves needed to sustain new vegetative growth (Wang et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

“…However, significant diurnal fluctuations in leaf sucrose reserves occur in Populus (Wang et al ., 2022, Zhang et al ., 2014). Recent evidence suggests that in the absence of starch, other carbohydrates, presumably including sucrose, can provide the reserves needed to sustain new vegetative growth (Wang et al, 2022). Under extreme carbon limitation, carbohydrate storage can supersede growth as a priority (Wang et al, 2022, Wiley et al ., 2019, Sala et al ., 2012, Piper & Fajardo, 2016, Huang et al ., 2021).…”

Section: Introductionmentioning

confidence: 99%

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Perturbation of tonoplast sucrose transport alters carbohydrate utilization for seasonal growth and defense metabolism in coppiced poplar

Tuma,

Nyamdari,

Hsieh

et al. 2023

Preprint

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Non-structural carbohydrate reserves of stems and roots underpin overall tree fitness as well as productivity under short-rotation management practices such as coppicing for bioenergy. While both sucrose and starch comprise the predominant carbohydrate reserves ofPopulus, utilization is understood primarily in terms of starch turnover. The tonoplast sucrose transport protein SUT4 modulates sucrose export to distant sinks, but the possibility of its involvement in sink tissue carbohydrate remobilization has not been explored. Here, we usedPtaSUT4-knockout mutants ofPopulus tremula × alba(INRA 717-1B4) in winter and summer glasshouse coppicing experiments to strain carbon demand and test for SUT4 involvement in reserve utilization. We show that epicormic bud emergence was delayed and subsequent growth reduced insut4mutants following winter but not summer coppicing. Reserve depletion during post-coppice regrowth was not impaired in thesut4mutants under winter or summer glasshouse conditions. Interestingly, xylem hexose increased during post-coppice growth exclusively in the winter when osmoprotection is critical, and the increase was attenuated insut4mutants. Accrual of abundant defense metabolites, including salicinoids, chlorogenic acids, and flavonoid products was prioritized in the summer, but conspicuously lower insut4mutants than controls. Together, our results point to shifting priorities for SUT4 function from support for osmoprotection in winter to chemical defense in summer. Delayed bud release and growth following winter but not summer coppicing in thesut4mutants demonstrate the importance of SUT4 in modulating trade-offs between growth and the other priorities during reserve utilization inPopulus.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Perturbation of tonoplast sucrose transport alters carbohydrate utilization for seasonal growth and defense metabolism in coppiced poplar

Tuma,

Nyamdari,

Hsieh

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

“…The growth and development of Populus are partially dependent on the functional microbial communities in the rhizosphere, which is the critical root-soil interface for plant growth ( Song et al, 2020 ). Research on Populus has focused on plant aboveground traits, such as photosynthetic characteristics, carbon and nitrogen storage, and circulation, or focused on single factor on the belowground traits ( Hogan et al, 2021 ; Wu X. et al, 2021 ; Wang et al, 2022 ). While research on the belowground traits, including dominant combined keystone taxa in the rhizosphere of Populus and the regulatory effects of differential root exudates on dominant and keystone taxa is lacking.…”

Section: Introductionmentioning

confidence: 99%

Populus root exudates are associated with rhizosphere microbial communities and symbiotic patterns

Song

et al. 2022

Front. Microbiol.

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IntroductionMicrobial communities in the plant rhizosphere are critical for nutrient cycling and ecosystem stability. However, how root exudates and soil physicochemical characteristics affect microbial community composition in Populus rhizosphere is not well understood.MethodsThis study measured soil physiochemistry properties and root exudates in a representative forest consists of four Populus species. The composition of rhizosphere bacterial and fungal communities was determined by metabolomics and high-throughput sequencing.ResultsLuvangetin, salicylic acid, gentisic acid, oleuropein, strigol, chrysin, and linoleic acid were the differential root exudates extracted in the rhizosphere of four Populus species, which explained 48.40, 82.80, 48.73, and 59.64% of the variance for the dominant and key bacterial or fungal communities, respectively. Data showed that differential root exudates were the main drivers of the changes in the rhizosphere microbial communities. Nitrosospira, Microvirga, Trichoderma, Cortinarius, and Beauveria were the keystone taxa in the rhizosphere microbial communities, and are thus important for maintaining a stable Populus microbial rhizosphere. The differential root exudates had strong impact on key bacteria than dominant bacteria, key fungi, and dominant fungi. Moreover, strigol had positively effects with bacteria, whereas phenolic compounds and chrysin were negatively correlated with rhizosphere microorganisms. The assembly process of the community structure (keystone taxa and bacterial dominant taxa) was mostly determined by stochastic processes.DiscussionThis study showed the association of rhizosphere microorganisms (dominant and keystone taxa) with differential root exudates in the rhizosphere of Populus plants, and revealed the assembly process of the dominant and keystone taxa. It provides a theoretical basis for the identification and utilization of beneficial microorganisms in Populus rhizosphere.

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Integrative omics studies revealed synergistic link between sucrose metabolic isogenes and carbohydrates in poplar roots infected by Fusarium wilt

Xu,

Wei,

Yao

et al. 2024

Plant Mol Biol

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Aspen growth is not limited by starch reserves

Cited by 14 publications

References 52 publications

Perturbation of tonoplast sucrose transport alters carbohydrate utilization for seasonal growth and defense metabolism in coppiced poplar

Perturbation of tonoplast sucrose transport alters carbohydrate utilization for seasonal growth and defense metabolism in coppiced poplar

Populus root exudates are associated with rhizosphere microbial communities and symbiotic patterns

Integrative omics studies revealed synergistic link between sucrose metabolic isogenes and carbohydrates in poplar roots infected by Fusarium wilt

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