ArticlePlant & cell physiology2014
A unique HEAT repeat-containing protein SHOOT GRAVITROPISM6 is involved in vacuolar membrane dynamics in gravity-sensing cells of Arabidopsis inflorescence stem.
Article in Plant & cell physiology, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.
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16 citing papers in PubMed, 38 citations in OpenAlex.
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- Creeping Stem 1 regulates directional auxin transport for lodging resistance in soybean.Plant biotechnology journal · 2025Article
- Cellular and physiological functions of SGR family in gravitropic response in higher plants.Journal of advanced research · 2025Review
- Single-nucleus RNA and ATAC sequencing analyses provide molecular insights into early pod development of peanut fruit.Plant communications · 2024Article
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- Fine-mapping of a QTL and identification of candidate genes associated with the lateral branch angle of peanuts (Frontiers in plant science · 2024Article
- Gravity sensing and responses in the coordination of the shoot gravitropic setpoint angle.The New phytologist · 2022Review
- Genome-wide association study and transcriptome analysis reveal key genes controlling fruit branch angle in cotton.Frontiers in plant science · 2022Article
- EARLY STARVATION 1 Is a Functionally Conserved Protein Promoting Gravitropic Responses in Plants by Forming Starch Granules.Frontiers in plant science · 2021Article
- Alternative splicing profiling provides insights into the molecular mechanisms of peanut peg development.BMC plant biology · 2020Article
- A Core Regulatory Pathway Controlling Rice Tiller Angle Mediated by theThe Plant cell · 2018Article
- Mroh1, a lysosomal regulator localized by WASH-generated actin.Journal of cell science · 2017Article
- Wortmannin-induced vacuole fusion enhances amyloplast dynamics in Arabidopsis zigzag1 hypocotyls.Journal of experimental botany · 2016Article
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10 authors at 4 institutions in 1 country.
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No grant is acknowledged in the PubMed record.
Abstract
Plant vacuoles play critical roles in development, growth and stress responses. In mature cells, vacuolar membranes (VMs) display several types of structures, which are formed by invagination and folding of VMs into the lumenal side and can gradually move and change shape. Although such VM structures are observed in a broad range of tissue types and plant species, the molecular mechanism underlying their formation and maintenance remains unclear. Here, we report that a novel HEAT-repeat protein, SHOOT GRAVITROPISM6 (SGR6), of Arabidopsis is involved in the control of morphological changes and dynamics of VM structures in endodermal cells, which are the gravity-sensing cells in shoots. SGR6 is a membrane-associated protein that is mainly localized to the VM in stem endodermal cells. The sgr6 mutant stem exhibits a reduced gravitropic response. Higher plants utilize amyloplast sedimentation as a means to sense gravity direction. Amyloplasts are surrounded by VMs in Arabidopsis endodermal cells, and the flexible and dynamic structure of VMs is important for amyloplast sedimentation. We demonstrated that such dynamic features of VMs are gradually lost in sgr6 endodermal cells during a 30 min observation period. Histological analysis revealed that amyloplast sedimentation was impaired in sgr6. Detailed live-cell imaging analyses revealed that the VM structures in sgr6 had severe defects in morphological changes and dynamics. Our results suggest that SGR6 is a novel protein involved in the formation and/or maintenance of invaginated VM structures in gravity-sensing cells.
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