Category Ranking
98%
Total Visits
921
Avg Visit Duration
2 minutes
Citations
20
Article Abstract
A reaction-diffusion model is proposed to describe the mechanisms underlying the spatial distributions of ROP1 and calcium on the pollen tube tip. The model assumes that the plasma membrane ROP1 activates itself through positive feedback loop, while the cytosolic calcium ions inhibit ROP1 via a negative feedback loop. Furthermore it is proposed that lateral movement of molecules on the plasma membrane are depicted by diffusion. It is shown that bistable or oscillatory dynamics could exist even in the non-spatial model, and stationary and oscillatory spatiotemporal patterns are found in the full spatial model which resemble the experimental data of pollen tube tip growth.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1007/s00285-019-01396-7 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Spatial organization and trafficking dynamics of ANX/BUPS-RALF-LLG signaling complexes during pollen tube growth.
Plant Reprod
August 2025
Cell Biology and Plant Biochemistry, University of Regensburg, 93040, Regensburg, Germany.
Key Message:
Abstract: Pollen tube growth requires precise regulation of cell wall integrity, which is maintained by ANX/BUPS-RALF-LLG signaling complexes. While structural and biochemical studies have revealed physical interactions between these components, their spatial organization and assembly dynamics in growing pollen tubes remain unclear. Here, we systematically investigated the subcellular localization and endomembrane trafficking of ANX/BUPS-RALF-LLG complex components through transient expression studies in tobacco pollen tubes.
OsMATE7-mediated flavonol accumulation regulates pollen tube growth in rice.
Plant J
August 2025
State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China, Rice Research Institute, Sichuan Agricultural University, Chengdu, Sichuan, China.
Flavonols have been implicated in male sterility and pollen tube growth for over three decades; however, the molecular mechanisms mediating their accumulation in pollen grains remain poorly understood. In this study, a multidrug and toxic compound extrusion (MATE) transporter, OsMATE7, was identified as a key regulator of flavonol accumulation in mature pollen grains, thereby promoting pollen tube growth in rice (Oryza sativa). Mutation of OsMATE7 resulted in a significant reduction in seed setting rates.
View Article and Find Full Text PDFArabidopsis RabGDIs mediate Rab targeting and are crucial for male gametophytic function.
New Phytol
August 2025
Frontiers Science Center for Cell Responses, College of Life Sciences, Nankai University, Tianjin, 300071, China.
Rab GTPases are key regulators of vesicular trafficking, not only switching between active and inactive forms but also cycling between donor/resident and target membranes, a process regulated by factors including guanine nucleotide dissociation inhibitors (RabGDIs), whose function is largely unknown in plants. By reverse genetic approaches, we demonstrate that Arabidopsis RabGDIs redundantly mediate male fertility such that the functional loss of RabGDIs compromises pollen development, germination, and directional growth of pollen tubes. By combining cellular and pharmacological approaches, we demonstrate that RabGDIs are critical for the targeting of Rab GTPases not only in secretory but also in vacuolar pathways.
View Article and Find Full Text PDFOutcrossing preference in Magnolia ×soulangeana 'Hongyun' is associated with differential stigmatic ROS accumulation regulated by MsFERONIA-MsROP2-MsROBHD module.
Plant Sci
August 2025
Co-Innovation Center for Sustainable Forestry in Southern China, College of Life Sciences, Nanjing Forestry University, Nanjing 210037, China. Electronic address:
As primitive angiosperms, bisexual Magnolia species evolved a relatively advanced mating system, namely facultative outcrossing, avoiding inbreeding depression meanwhile providing a certain reproductive assurance. Explosive advances have been made in the molecular understanding of pollen-pistil interactions in the past decades, especially emphasizing the role of FERONIA-RAC/ROP-RBOHD module. However, relevant molecular framework in primitive angiosperms remains largely unknown.
View Article and Find Full Text PDFNtLLG4-mediated unconventional polar exocytosis of NtPPME1 coordinates cell wall rigidity and membrane dynamics to control pollen tube integrity.
Sci Adv
August 2025
Department of Cell and Developmental Biology, College of Life Sciences, South China Agricultural University, Guangzhou 510642, China.
Plant fertilization relies on controlled pollen tube growth that integrates membrane dynamics and cell wall expansion. We previously identified an unconventional exocytic pathway wherein Golgi-derived secretory vesicles (GDSVs) bypass the trans-Golgi network to deliver pectin methylesterase 1 (NtPPME1), thereby modulating cell wall rigidity. However, the mechanisms linking this pathway with membrane dynamics and signaling remain elusive.
View Article and Find Full Text PDF