Long-distance control of potato storage organ formation by SELF PRUNING 3D and FLOWERING LOCUS T-like 1

Jing, Shenglin; Jiang, Peng; Sun, Xiaomeng; Yu, Liu; Wang, Enshuang; Qin, Jun; Zhang, Fei; Prat, Salomé; Song, Baoxing

doi:10.1016/j.xplc.2023.100547

Cited by 22 publications

(16 citation statements)

References 50 publications

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“…Nine SuSy genes showed expression in stolons and tubers, with the majority expressed in tubers (seven out of nine). SWEET and SUT expression patterns were more ambiguous than sucrose and callose metabolism, consistent with earlier observations (Jing et al, 2023), and a more important role for post-translational interactions such as between StSP6A and StSWEET11b is expected for these families.…”

Section: A Clear Developmental Pattern Is Present For Callose and Suc...supporting

confidence: 89%

“…Besides changes in callose homeostasis, a rewiring of sucrose metabolism as well as changes in sugar transporters are known to occur during tuberization (Jing et al, 2023;Viola et al, 2001). To investigate if and how these processes are coupled during tuberization the gene expression of callose (1, and sucrose metabolism (SuSy, cwInv, vInv and Inv) as well as sucrose transporters (SWEET and SUT) were investigated alone, as well as in combination (Figures S3 and S6 in the Supplementary Material).…”

Section: A Clear Developmental Pattern Is Present For Callose and Suc...mentioning

confidence: 99%

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A coordinated switch in sucrose and callose metabolism enables enhanced symplastic unloading in potato tubers

van den Herik,

Bergonzi,

et al. 2024

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One of the early changes upon tuber induction is the switch from apoplastic to symplastic unloading. Whether and how this change in unloading mode contributes to sink strength has remained unclear. In addition, developing tubers also change from energy to storage-based sucrose metabolism. Here, we investigated the coordination between changes in unloading mode and sucrose metabolism and their relative role in tuber sink strength by looking into callose and sucrose metabolism gene expression combined with a model of apoplastic and symplastic unloading. Gene expression analysis suggests that callose deposition in tubers is decreased by lower callose synthase expression. Furthermore, changes in callose and sucrose metabolism are strongly correlated, indicating a well-coordinated developmental switch. Modelling indicates that symplastic unloading is not the most efficient unloading mode per se. Instead, it is the concurrent metabolic switch that provides the physiological conditions necessary to potentiate symplastic transport and thereby enhance tuber sink strength .

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Section: A Clear Developmental Pattern Is Present For Callose and Suc...supporting

confidence: 89%

Section: A Clear Developmental Pattern Is Present For Callose and Suc...mentioning

confidence: 99%

A coordinated switch in sucrose and callose metabolism enables enhanced symplastic unloading in potato tubers

van den Herik,

Bergonzi,

et al. 2024

Quant Plant Bio.

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“…In other species, the roles for the PEBP family have proliferated: in potato ( Solanum tuberosum ), the FT - like SELF-PRUNING 6A ( StSP6A ) gene is activated in leaves under short-day conditions (SDs) due to the inactivation of the FT-like repressor SELF PRUNING 5G ( StSP5G ) by unstable StCOL1 ( Navarro et al 2011 ; Abelenda et al 2016 ). Along with 2 other SD-activated transmissible FT-like proteins, StSP3D and FT-like 1 (StFTL1), SP6A protein is then transported via phloem from leaves to stolons, where it forms a floral activation-like complex, termed the tuberigen activation complex, which promotes tuber formation ( Teo et al 2017 ; Jing et al 2023 ). A similar shoot-to-root translocation is found in soybean ( Glycine max ), where the shoot-derived ortholog of Arabidopsis FT, GmNN1/FT2a, triggers nodulation upon rhizobial infection ( Kong et al 2010 ; Sun et al 2011 ; Li et al 2022b ).…”

Section: Genes Identified Through Flowering Time Mutants Frequently E...mentioning

confidence: 99%

Flowering time: From physiology, through genetics to mechanism

Maple,

Zhu,

Hepworth

et al. 2024

Plant Physiology

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Plant species have evolved different requirements for environmental/endogenous cues to induce flowering. Originally, these varying requirements were thought to reflect the action of different molecular mechanisms. Thinking changed when genetic and molecular analysis in Arabidopsis thaliana revealed that a network of environmental and endogenous signalling input pathways converge to regulate a common set of ‘floral pathway integrators’. Variation in the predominance of the different input pathways within a network can generate the diversity of requirements observed in different species. Many genes identified by flowering time mutants were found to encode general developmental and gene regulators, with their targets having a specific flowering function. Studies of natural variation in flowering were more successful at identifying genes acting as nodes in the network central to adaptation and domestication. Attention has now turned to mechanistic dissection of flowering time gene function and how that has changed during adaptation. This will inform breeding strategies for climate-proof crops and help define which genes act as critical flowering nodes in many other species.

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“…Interestingly, tuberization also occurs in StSP6A knockdown plants (Navarro et al, 2011), suggesting that other known tuberization signals such as the StBEL5 factor, giberellin signalling and sucrose play partly redundant roles (Khondare et al, 2020). Indeed, recently it was shown that the florigen StSP3D also acts as a mobile tuber-inducing protein in the absence of the main tuberigen StSP6A ( Jing et al, 2023 ) . Thus, while developmental signals control the development of tubers through multiple, partly redundant, pathways, competition for and dependence on a shared energy resource leads to complex feedback relationships between timing and formation of tubers, leaves and other organs.…”

Section: Introductionmentioning

confidence: 99%

Mobile tuberigen impacts tuber onset synchronization and canopy senescence timing in potato

van den Herik,

Bergonzi,

Bachem

et al. 2023

Preprint

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Yield of harvestable organs is a complex function of photosynthetic output, and sink-strength and timing of competing carbon sinks. In potato (Solanum tuberosum) the effect of tuber onset timing and post-tuberization canopy senescence on growth dynamics and tuber fresh weight are poorly understood. To advance our understanding we compared above- and belowground traits of wildtype plants (WT) withStSP6A, i.e., tuberigen, knockdown plants (SP6Ai) and developed simple computational models to aid interpretation of results. We find that SP6Ai results in a delay of approximately 2 weeks in tuber onset, yet has a 4-to-5-week delayed canopy senescence. Together this results in a prolonged tuber growth phase, with reduced synchronization in tuber onset and a resulting increased variance in tuber sizes, while overall final tuber fresh weight remains similar. Using a leaf and tuber growth model comparing various leaf senescence mechanisms, we find that resource competition, and not a shared signal for tuberization and senescence, is able to explain how delayed tuberization leads to further delayed senescence. Our results point to a role for resource competition in the correlated timing of tuber onset and canopy senescence, as well as a leading role forStSP6Ain tuber onset synchronization and tuber size uniformity.Graphical Abstract

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Long-distance control of potato storage organ formation by SELF PRUNING 3D and FLOWERING LOCUS T-like 1

Cited by 22 publications

References 50 publications

A coordinated switch in sucrose and callose metabolism enables enhanced symplastic unloading in potato tubers

A coordinated switch in sucrose and callose metabolism enables enhanced symplastic unloading in potato tubers

Flowering time: From physiology, through genetics to mechanism

Mobile tuberigen impacts tuber onset synchronization and canopy senescence timing in potato

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