Carbohydrate distribution via SWEET17 is critical for Arabidopsis inflorescence branching under drought

Valifard, Marzieh; Khan, Azkia; Hir, Rozenn Le; Pommerrenig, Benjamin; Neuhaus, H. Ekkehard; Keller, Isabel

doi:10.1101/2023.01.10.523414

Cited by 3 publications

(2 citation statements)

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“…[190][191][192] Identification of molecular factors that affect inflorescence development under stress conditions, as well as exploring environmentally sensitive aspects of cytokinin, auxin and sugar signaling, can lead to increased environmental resilience and significant alleviation of the yield penalty. [193][194][195][196] Leaf architecture Leaf system architecture constitutes the specific characteristics of the leaves, such as size, shape and angle, as well as the number of leaves that the plants produce prior to initiation of reproductive phase (Figure 1, Table S3 in Extended data 374 ). These aspects differ from each other in their plasticity and response to the environment.…”

Section: Shoot Architecturementioning

confidence: 99%

Tapping into the plasticity of plant architecture for increased stress resilience

Rahmati Ishka,

Julkowska

2023

F1000Res

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Plant architecture develops post-embryonically and emerges from a dialogue between the developmental signals and environmental cues. Length and branching of the vegetative and reproductive tissues were the focus of improvement of plant performance from the early days of plant breeding. Current breeding priorities are changing, as we need to prioritize plant productivity under increasingly challenging environmental conditions. While it has been widely recognized that plant architecture changes in response to the environment, its contribution to plant productivity in the changing climate remains to be fully explored. This review will summarize prior discoveries of genetic control of plant architecture traits and their effect on plant performance under environmental stress. We review new tools in phenotyping that will guide future discoveries of genes contributing to plant architecture, its plasticity, and its contributions to stress resilience. Subsequently, we provide a perspective into how integrating the study of new species, modern phenotyping techniques, and modeling can lead to discovering new genetic targets underlying the plasticity of plant architecture and stress resilience. Altogether, this review provides a new perspective on the plasticity of plant architecture and how it can be harnessed for increased performance under environmental stress.

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Section: Shoot Architecturementioning

confidence: 99%

Tapping into the plasticity of plant architecture for increased stress resilience

Rahmati Ishka,

Julkowska

2023

F1000Res

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“…AtSWEET17, a vacuolar fructose facilitator, contributes to the modulation of the root system during drought [14]. By participating in carbon redistribution in the whole plant under drought stress, AtSWEET17 also plays a role in cauline branch emergence and growth [15]. AtSWEET11 and AtSWEET12, which are involved in sucrose phloem loading, were significantly upregulated in the leaves of water-deficient plants and facilitated sugar export from the leaves to the roots to maintain an efficient root system under drought [16].…”

Section: Introductionmentioning

confidence: 99%

PagSWEET17a Mediates Sugar Transport in Root and Affects Drought Tolerance in Populus alba × P. glandulosa

Hao

Wang

et al. 2023

Forests

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Sugars are the principal carbon and energy sources and serve as osmotic regulators and radical scavengers, thus playing an important role in plant responses to drought. Sugar transporters steering the distribution of sugar are vital players involved in tolerance to drought. Sugars Will Eventually be Exported Transporters (SWEETs) facilitate both the influx and efflux of mono- and/or disaccharides and control both inter and intracellular distribution of sugars. PagSWEET17a in Populus alba × P. glandulosa is one of four orthologous genes of AtSWEET17 in Arabidopsis. Unlike AtSWEET17, which is a vacuolar localized transporter, PagSWEET17a is localized to the endoplasmic reticulum (ER). Here, the role of PagSWEET17a in poplar responses to drought stress was investigated. PagSWEET17a was specifically expressed in cambium cells in younger root but mainly located in phloem fibers, and xylem vessels and fiber cells in the root undergoing secondary growth. Loss of PagSWEET17a inhibited the growth of roots in poplar seedlings and led to a decreased tolerance to drought. Analysis of sugar profiles revealed that accumulations of predominant sugars were significantly suppressed in both knockout (KO) mutant lines under drought. PagSWEET17a might contribute to poplar tolerance to drought by promoting drought-induced root expansion and diminishing oxidative damages caused by the stress.

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Changes in SWEET-mediated sugar partitioning affect photosynthesis performance and plant response to drought

Aubry,

Clément,

Gilbault

et al. 2024

Preprint

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Sugars, produced through photosynthesis, are at the core of all organic compounds synthesized and used for plant growth and response to the environmental changes. Therefore, their production, transport and utilization is highly regulated and integrated throughout the plant life cycle. The maintenance of sugar partitioning between the different subcellular compartments (e.g., cytosol, vacuole, chloroplast), and mediated by different families of sugar transporters (e.g., SUC/SUT, SWEET, ERDL), is instrumental to adjust the photosynthesis performance and response to abiotic constraints. Here we investigated in Arabidopsis the consequences of the disruption of four genes coding for SWEET sugar transporters (SWEET11, SWEET12, SWEET16 and SWEET17) on plant photosynthesis and response to drought. Our results show that, the disruption of the intercellular sugar transport, mediated by SWEET11, negatively impacts photosynthesis efficiency and net CO2 assimilation while the stomatal conductance and transpiration are increased. These defects are accompanied by an impairment of both cytosolic and chloroplastic glycolysis leading to an accumulation of soluble sugars, starch and organic acids. Further, our results suggest that in the swt11swt12 mutant, the sucrose-induced feedback mechanism on stomatal closure is poorly efficient. On the other hand, changes in fructose partitioning in mesophyll and vascular cells, mediated by SWEET17, positively impact photosynthesis probably through an increased starch synthesis together with a higher vacuolar sugar storage. Finally, our work shows that, a fine tuning, at transcriptional and/or translational levels, of the expression of SWEET11, SWEET16 and SWEET17 is needed in order to properly respond to drought stress.

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Carbohydrate distribution via SWEET17 is critical for Arabidopsis inflorescence branching under drought

Cited by 3 publications

References 100 publications

Tapping into the plasticity of plant architecture for increased stress resilience

Tapping into the plasticity of plant architecture for increased stress resilience

PagSWEET17a Mediates Sugar Transport in Root and Affects Drought Tolerance in Populus alba × P. glandulosa

Changes in SWEET-mediated sugar partitioning affect photosynthesis performance and plant response to drought

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