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The fullerene molecule belongs to the so-called super materials. The compound is interesting due to its spherical configuration where atoms occupy positions forming a mechanically stable structure. We first demonstrate that pollen of Hibiscus rosa-sinensis has a strong symmetry regarding the distribution of its spines over the spherical grain. These spines form spherical hexagons and pentagons. The distance between atoms in fullerene is explained applying principles of flat, spherical, and spatial geometry, based on Euclid's "Elements" book, as well as logic algorithms. Measurements of the pollen grain take into account that the true spine lengths, and consequently the real distances between them, are measured to the periphery of each grain. Algorithms are developed to recover the spatial effects lost in 2D photos. There is a clear correspondence between the position of atoms in the fullerene molecule and the position of spines in the pollen grain. In the fullerene the separation gives the idea of equal length bonds which implies perfectly distributed electron clouds while in the pollen grain we suggest that the spines being equally spaced carry an electrical charge originating in forces involved in the pollination process.
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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4086983 | PMC |
http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0102123 | PLOS |
Sci Total Environ
September 2025
Center for Climate and Carbon Cycle Research, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea; Division of Energy & Environment Technology, KIST School, University of Science and Technology, Seoul 02792, Republic of Korea. Electronic address:
Neonicotinoid insecticides have been identified as significant contributors to the decline of pollinators. To evaluate potential exposure of pollinators to neonicotinoids in South Korea, 79 honey samples and 27 pollen samples were obtained from agricultural, mountain, and urban areas. These samples were analyzed for 17 compounds, including neonicotinoids and their metabolites using liquid chromatography coupled with mass spectrometry.
View Article and Find Full Text PDFCurr Biol
September 2025
Oosterland, Netherlands.
Tropical peatlands are globally significant ecosystems for carbon cycling and storage, hydrological regulation, and unique biodiversity. There is a diversity of tropical peatland types globally, but tropical peat-forming ecosystems are typically forested without the Sphagnum groundcover that is often characteristic of high-latitude peatlands. Here, we report on a unique tropical peatland situated in Belize that challenges our understanding of both tropical and extra-tropical peatlands owing to the presence of Sphagnum in the undergrowth.
View Article and Find Full Text PDFJ Exp Bot
September 2025
Department of Molecular Genetics, Ohio State University, Columbus, OH 43210, USA.
Pollen apertures are specialized regions on the pollen surface that receive little to no exine deposition, forming distinct structures important for pollen function. Aperture number, shape, and positions vary widely across species, resulting in diverse, species-specific patterns that make apertures fascinating from both cell-biological and evolutionary perspectives. Aperture formation requires developing pollen to establish polarity and define specific regions of the plasma membrane as aperture domains.
View Article and Find Full Text PDFAm J Bot
September 2025
Department of Biology, University of Virginia, P.O. Box 400328, Charlottesville, 22904, Virginia, USA.
Premise: Transitions from outcrossing to selfing often drive the evolution of floral traits in a predictable way. However, these expectations are not as straightforward for mixed-mating systems. In this study, we examine variation in pollen-collecting hairs, a floral structure involved in secondary pollen presentation within Campanulaceae.
View Article and Find Full Text PDFCell
August 2025
College of Life Sciences, Guizhou Normal University, Guiyang 550025, China; State Key Laboratory of Hybrid Rice, College of Life Sciences, Wuhan University, Wuhan 430072, China. Electronic address:
Haploid induction (HI) through stress-treated microspore culture has gained significant attention for over half a century, yet the molecular mechanism underlying microspore fate transition for androgenesis remains poorly understood. Here, we demonstrate that microspore-specific expression of BABY BOOM (BBM) is sufficient to induce microspore cell fate transition and in vivo androgenesis in both tobacco and rice, effectively bypassing the requirement for stress treatment. We further identify BBM-activated Androgenesis Regulator 1 (BAR1) as a novel downstream effector of BBM that promotes microspore reprogramming.
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