Pregled bibliografske jedinice broj: 1281837
Mechanical design and infolding of pollen grains
Mechanical design and infolding of pollen grains // Solid-State Science & Research Zagreb, 28 - 30 June 2023 BOOK OF ABSTRACTS / Biliškov, Nikola ; Karadeniz, Bahr ; Pantalon Juraj, Natalija (ur.).
Zagreb: Institut Ruđer Bošković, 2023. str. 25-25 (pozvano predavanje, podatak o recenziji nije dostupan, sažetak, znanstveni)
CROSBI ID: 1281837 Za ispravke kontaktirajte CROSBI podršku putem web obrasca
Naslov
Mechanical design and infolding of pollen grains
Autori
Šiber, Antonio
Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni
Izvornik
Solid-State Science & Research Zagreb, 28 - 30 June 2023 BOOK OF ABSTRACTS
/ Biliškov, Nikola ; Karadeniz, Bahr ; Pantalon Juraj, Natalija - Zagreb : Institut Ruđer Bošković, 2023, 25-25
ISBN
978-953-7941-48-2
Skup
Solid-State Science & Research Zagreb, 28 - 30 June 2023
Mjesto i datum
Zagreb, Hrvatska, 28.06.2023. - 30.06.2023
Vrsta sudjelovanja
Pozvano predavanje
Vrsta recenzije
Podatak o recenziji nije dostupan
Ključne riječi
pollen, elasticity, mechanics, infolding, collapse, pressure, thin shell
Sažetak
Pollen carries male plant genetic material encapsulated in a hard protective shell containing flexible, soft regions—apertures. The mechanical design of the shell regulates how the pollen grain folds into itself (infolds) upon dehydration, which often occurs once it becomes exposed to the environment. The same design also guides the response of pollen grains to hydration which may lead to bursting of the pore and the leakage of the pollen proteins in the atmosphere – this process releases submicronic pollen particles, which can provoke strong allergic reactions in sensitive individuals. Infolding pathways of pollen grains are investigated by studying elastic deformations of inhomogeneous thin shells. Different pathways are governed by the interplay between the elastic properties of the hard and soft regions of the pollen shell and by the aperture shape, number, and size. We delineate regions of mechanical parameters of the pollen grain which lead to complete closure of all apertures, thus reducing water loss and presenting evolutionary viable solutions to the infolding problem [1]. We also show that the apertures, although important for the initiation of the pollen tube, also present a weak regions of the grain wall and that they are prone to bursting once the pollen grain swells enough in humid atmosphere [2]. [1] A. Božič, A. Šiber, Proc. Natl. Acad. Sci. U.S.A. 117 (2020) 26600. [2] A. Božič, A. Šiber, Biophys J 121 (2022) 782.
Izvorni jezik
Engleski
Znanstvena područja
Fizika
