ArticleBMC plant biology2018
New insights into the evolution and functional divergence of the SWEET family in Saccharum based on comparative genomics.
Article in BMC plant biology, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 42 papers.
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42 citing papers in PubMed, 130 citations in OpenAlex.
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- Identification of the SWEET gene family and functional characterization of PsSWEET1a and PsSWEET17b in the regulation of sugar accumulation in 'Fengtang' plum (Prunus salicina Lindl.).BMC plant biology · 2025Article
- Genome-Wide Identification of the SWEET Gene Family and Functional Analysis ofInternational journal of molecular sciences · 2025Article
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- Identification of the tetraspanin gene family in sugarcane and its response to sugarcane mosaic virus infection.Frontiers in plant science · 2025Article
- The highly allo-autopolyploid modern sugarcane genome and very recent allopolyploidization in Saccharum.Nature genetics · 2025Article
- Genome wide identification of BjSWEET gene family and drought response analysis of BjSWEET12 and BjSWEET17 genes in Brassica juncea.BMC plant biology · 2024Article
- Genome-wide identification of Gα family in grass carp (Ctenopharyngodon idella) and reproductive regulation functional characteristics of Cignaq.BMC genomics · 2024Article
- Sugar sensing in C4 source leaves: a gap that needs to be filled.Journal of experimental botany · 2024Review
- Genome-Wide Analysis of the Auxin/Indoleacetic Acid (International journal of molecular sciences · 2024Article
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- Current perspectives on the regulatory mechanisms of sucrose accumulation in sugarcane.Heliyon · 2024Review
- Genomic investigation of duplication, functional conservation, and divergence in the LRR-RLK Family of Saccharum.BMC genomics · 2024Article
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- Molecular Cloning, Expression Analysis, and Functional Analysis of NineInternational journal of molecular sciences · 2023Article
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11 authors at 6 institutions in 4 countries.
Funding
Abstract
backgroundThe SWEET (Sugars Will Eventually be Exported Transporters) gene family is a recently identified group of sugar transporters that play an indispensable role in sugar efflux, phloem loading, plant-pathogen interaction, nectar secretion, and reproductive tissue development. However, little information on Saccharum SWEET is available for this crop with a complex genetic background.
resultsIn this study, 22 SWEET genes were identified from Saccharum spontaneum Bacterial Artificial Chromosome libraries sequences. Phylogenetic analyses of SWEETs from 11 representative plant species showed that gene expansions of the SWEET family were mainly caused by the recent gene duplication in dicot plants, while these gene expansions were attributed to the ancient whole genome duplication (WGD) in monocot plant species. Gene expression profiles were obtained from RNA-seq analysis. SWEET1a and SWEET2s had higher expression levels in the transitional zone and maturing zone than in the other analyzed zones. SWEET1b was mainly expressed in the leaf tissues and the mature zone of the leaf of both S. spontaneum and S. officinarum, and displayed a peak in the morning and was undetectable in both sclerenchyma and parenchyma cells from the mature stalks of S. officinarum. SsSWEET4a\4b had higher expression levels than SWEET4c and were mainly expressed in the stems of seedlings and mature plants. SWEET13s are recently duplicated genes, and the expression of SWEET13s dramatically increased from the maturing to mature zones. SWEET16b's expression was not detected in S. officinarum, but displayed a rhythmic diurnal expression pattern.
conclusionsOur study revealed the gene evolutionary history of SWEETs in Saccharum and SWEET1b was found to be a sucrose starvation-induced gene involved in the sugar transportation in the high photosynthetic zones. SWEET13c was identified as the key player in the efflux of sugar transportation in mature photosynthetic tissues. SWEET4a\4b were found to be mainly involved in sugar transportation in the stalk. SWEET1a\2a\4a\4b\13a\16b were suggested to be the genes contributing to the differences in sugar contents between S. spontaneum and S. officinarum. Our results are valuable for further functional analysis of SWEET genes and utilization of the SWEET genes for genetic improvement of Saccharum for biofuel production.
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