Academic Journal
Biophysical evidence that frostbite is triggered on nanocrystals of biogenic magnetite in garlic cloves (Allium sativum)
| العنوان: | Biophysical evidence that frostbite is triggered on nanocrystals of biogenic magnetite in garlic cloves (Allium sativum) |
|---|---|
| المؤلفون: | Atsuko Kobayashi, Daisuke Tanaka, Hironori Hidaka, Kasumi Sakurai, Kotaro Kawai, Toyohiro Kato, Kumiko Kihara, Joseph L. Kirschvink |
| المصدر: | Communications Biology, Vol 7, Iss 1, Pp 1-10 (2024) |
| بيانات النشر: | Nature Portfolio, 2024. |
| سنة النشر: | 2024 |
| المجموعة: | LCC:Biology (General) |
| مصطلحات موضوعية: | Biology (General), QH301-705.5 |
| الوصف: | Abstract Trace levels of biologically precipitated magnetite (Fe3O4) nanocrystals are present in the tissues of many living organisms, including those of plants. Recent work has also shown that magnetite nanoparticles are powerful ice nucleation particles (INPs) that can initiate heterogeneous freezing in supercooled water just below the normal melting temperature. Hence there is a strong possibility that magnetite in plant tissues might be an agent responsible for triggering frost damage, even though the biological role of magnetite in plants is not understood. To test this hypothesis, we investigated supercooling and freezing mortality in cloves of garlic (Allium sativum), a species which is known to have moderate frost resistance. Using superconducting magnetometry, we detected large numbers of magnetite INPs within individual cloves. Oscillating magnetic fields designed to torque magnetite crystals in situ and disturb the ice nucleating process produced significant effects on the temperature distribution of supercooling, thereby confirming magnetite’s role as an INP in vivo. However, weak oscillating fields increased the probability of freezing, whereas stronger fields decreased it, a result that predicts the presence of magnetite binding agents that are loosely attached to the ice nucleating sites on the magnetite crystals. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 2399-3642 |
| Relation: | https://doaj.org/toc/2399-3642 |
| DOI: | 10.1038/s42003-024-06749-7 |
| URL الوصول: | https://doaj.org/article/5212a2b2cc5747b386ec5468f7f2db04 |
| رقم الانضمام: | edsdoj.5212a2b2cc5747b386ec5468f7f2db04 |
| قاعدة البيانات: | Directory of Open Access Journals |
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