The sucrose transporter MdSUT4.1 participates in the regulation of fruit sugar accumulation in apple

Peng, Qian; Cai, Yaming; Lai, Enhui; Nakamura, Masayoshi; Liao, Liao; Zheng, Beibei; Ogutu, Collins; Cherono, Sylvia; Han, Yuepeng

doi:10.1186/s12870-020-02406-3

Cited by 49 publications

(23 citation statements)

References 83 publications

(115 reference statements)

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“…Indeed, HXK1 can form a complex with a vacuolar H + -ATPase and the 19S subunit of the proteasome, that directly modulates the expression of target genes ( Cho et al., 2006 ). While most SUT transporters are localized in plasma membrane, some members of SUTII subfamily were found associated with vacuole membrane and their overexpression results in increased sucrose accumulation in this organelle ( Ma et al., 2017 ; Ma et al., 2019 ; Peng et al., 2020 ). Surprisingly, a negative correlation between apple tonoplast MdSut4.1 expression and sucrose accumulation was observed, and was confirmed by transient overexpression in strawberry fruit, suggesting a function in sucrose remobilization out of the vacuole ( Schneider et al., 2012 ; Peng et al., 2020 ).…”

Section: Sugar Signaling In Fruit Development and Ripening And Its Crmentioning

confidence: 99%

Sugar Signaling During Fruit Ripening

et al. 2020

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Sugars play a key role in fruit quality, as they directly influence taste, and thus consumer acceptance. Carbohydrates are the main resources needed by the plant for carbon and energy supply and have been suggested to be involved in all the important developmental processes, including embryogenesis, seed germination, stress responses, and vegetative and reproductive growth. Recently, considerable progresses have been made in understanding regulation of fruit ripening mechanisms, based on the role of ethylene, auxins, abscisic acid, gibberellins, or jasmonic acid, in both climacteric and non-climacteric fruits. However, the role of sugar and its associated molecular network with hormones in the control of fruit development and ripening is still poorly understood. In this review, we focus on sugar signaling mechanisms described up to date in fruits, describing their involvement in ripening-associated processes, such as pigments accumulation, and their association with hormone transduction pathways, as well as their role in stress-related responses.

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Section: Sugar Signaling In Fruit Development and Ripening And Its Crmentioning

confidence: 99%

Sugar Signaling During Fruit Ripening

et al. 2020

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“…In recent years, studies on many horticultural plants have demonstrated that sugar accumulation is closely related to sucrose transporters and sucrose metabolism enzymes. An apple sucrose transporter MdSUT4 was found to be signi cantly associated with fruit sugar accumulation (Peng et al 2020). Sucrose synthase may play a critical role in the sugar metabolism of sucrose-accumulating grape berries (Shiraishi and Hamada 2020).…”

Section: Discussionmentioning

confidence: 99%

Systematic Analysis of Sugar Unloading And Accumulation Mechanism In Sucrose- And Hexose- Accumulating Tomato Fruits

Sun¹,

Wang²,

Song³

et al. 2021

Preprint

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Sugar is the key factor in the formation of fruit quality. Hexose is the main form of sugar accumulated in ordinary cultivated tomatoes, while a small number of wild-type tomato varieties can also accumulate sucrose. Although several studies have focused on wild sucrose-accumulating tomatoes, the sugar accumulation mechanism in tomato is still unclear. Here, two cherry tomatoes lines that accumulated sucrose and hexose respectively were selected to analyze the assimilates unloading pathway and sugar accumulation mechanism using CF tracing, cytological observation, proteomics methods, etc. The results indicated that the later stages of fruit development were key stages for sugar accumulation, and sucrose-accumulating (S) cherry tomatoes had higher sucrose contents in the fruits, while hexose-accumulating (H) cherry tomatoes accumulated more glucose, fructose and starch. The unloading pathway of assimilates in the S cherry tomato was switched from apoplastic to symplastic during fruit development, and the opposite was true in the H type. Plasmodesmata transport may be the main means of sucrose accumulation and high activity or expression levels of acid invertase (AI) and SUT1 may be important factors in hexose accumulation in H and S cherry tomatoes, respectively. In addition to sugar metabolism, photosynthesis, fatty acid metabolism and other secondary metabolism pathways also play important roles in sugar accumulation. This study provides detailed evidence for the tomato sugar accumulation mechanism from the perspective of cell structure, physiology and molecular biology, providing a theoretical basis for the improvement of tomato quality and aiding the utilization of tomato genetic resources.

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“…In apples, the expression of members of the sugar transporters family (e.g. SUT2 and SUT4 genes) facilitate sugar accumulation via the apoplastic pathway [ 65 ]. In kiwi fruits, high numbers of PD were observed in the SE-CC interface but not in the post-phloem unloading domains (CC-PC or SE-PC) concomitant with restricted symplasmic unloading of CF [ 54 ].…”

Section: Phloem Unloading Pathways In Developing Fruits: a Role For Pdmentioning

confidence: 99%

Plasmodesmata and their role in the regulation of phloem unloading during fruit development

Paniagua

Sinanaj

Benitez‐Alfonso

2021

Current Opinion in Plant Biology

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Fruit consumption is fundamental to a balanced diet. The contemporary challenge of maintaining a steady food supply to meet the demands of a growing population is driving the development of strategies to improve the production and nutritional quality of fruit. Plasmodesmata, the structures that mediate symplasmic transport between plant cells, play an important role in phloem unloading and distribution of sugars and signalling molecules into developing organs. Targeted modifications to the structures and functioning of plasmodesmata have the potential to improve fruit development; however, knowledge on the mechanisms underpinning plasmodesmata regulation in this context is scarce. In this review, we have compiled current knowledge on plasmodesmata and their structural characterisation during the development of fruit organs. We discuss key questions on phloem unloading, including the pathway shift from symplasmic to apoplastic that takes place during the onset of ripening as potential targets for improving fruit quality.

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The sucrose transporter MdSUT4.1 participates in the regulation of fruit sugar accumulation in apple

Cited by 49 publications

References 83 publications

Sugar Signaling During Fruit Ripening

Sugar Signaling During Fruit Ripening

Systematic Analysis of Sugar Unloading And Accumulation Mechanism In Sucrose- And Hexose- Accumulating Tomato Fruits

Plasmodesmata and their role in the regulation of phloem unloading during fruit development

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