Pressure-induced shape-shifting of helical bacteria

César L Pastrana, Luyi Qiu, Shahaf Armon, Ulrich Gerland, Ariel Amir

نتاج البحث: نشر في مجلةمقالةمراجعة النظراء


Many bacterial species are helical in shape, including the widespread pathogen H. pylori. Motivated by recent experiments on H. pylori showing that cell wall synthesis is not uniform [J. A. Taylor, et al., eLife, 2020, 9, e52482], we investigate the possible formation of helical cell shape induced by elastic heterogeneity. We show, experimentally and theoretically, that helical morphogenesis can be produced by pressurizing an elastic cylindrical vessel with helical reinforced lines. The properties of the pressurized helix are highly dependent on the initial helical angle of the reinforced region. We find that steep angles result in crooked helices with, surprisingly, a reduced end-to-end distance upon pressurization. This work helps explain the possible mechanisms for the generation of helical cell morphologies and may inspire the design of novel pressure-controlled helical actuators.
اللغة الأصليةالإنجليزيّة
الصفحات (من إلى)2224-2230
عدد الصفحات7
دوريةSoft Matter
مستوى الصوت19
رقم الإصدار12
تاريخ مبكر على الإنترنت8 فبراير 2023
المعرِّفات الرقمية للأشياء
حالة النشرنُشِر - 28 مارس 2023
منشور خارجيًانعم


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