Cavity and entrance pore development in ant plant hypocotyls

Some genera of Rubiaceae in South-eastern Asia are known as typical ant plants. They have large domatia, which form in well-developed hypocotyls in which ants nest. Previously, cavity formation processes were described; however, these reports were dependent on tissue sections of different individual...

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Main Authors: Hirokazu Tsukaya, Yutaka Ohtake
Format: Article
Language:English
Published: Frontiers Media S.A. 2023-09-01
Series:Frontiers in Plant Science
Subjects:
Online Access:https://www.frontiersin.org/articles/10.3389/fpls.2023.1234650/full
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author Hirokazu Tsukaya
Yutaka Ohtake
author_facet Hirokazu Tsukaya
Yutaka Ohtake
author_sort Hirokazu Tsukaya
collection DOAJ
description Some genera of Rubiaceae in South-eastern Asia are known as typical ant plants. They have large domatia, which form in well-developed hypocotyls in which ants nest. Previously, cavity formation processes were described; however, these reports were dependent on tissue sections of different individuals of different ages. No continuous time-course analyses were done because cavity formation occurs inside the thick tissues of highly swollen domatia. Here we observed cavity formation processes in ant plants by using X-ray computed tomography (CT) imaging and revealed previously overlooked features of cavity formation. Firstly, the cavity pore occurs at the hypocotyl base in not only gravity-dependent but also basal position-dependent manner. Secondly, the cavity forms prior to the start of short tunnel formation between the cavity and the pore. The cavity axis is parallel to the longitudinal axis of the hypocotyl; however, the short tunnel axis between the pore and cavity depends on gravity. Non-invasive CT scanning is a very powerful method to analyze deeply hidden morphogenic processes in organs.
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spelling doaj.art-83e28d07403d421eab518e6ecdc256d02023-09-07T19:41:51ZengFrontiers Media S.A.Frontiers in Plant Science1664-462X2023-09-011410.3389/fpls.2023.12346501234650Cavity and entrance pore development in ant plant hypocotylsHirokazu Tsukaya0Yutaka Ohtake1Graduate School of Science, The University of Tokyo, Tokyo, JapanGraduate School of Engineering, The University of Tokyo, Tokyo, JapanSome genera of Rubiaceae in South-eastern Asia are known as typical ant plants. They have large domatia, which form in well-developed hypocotyls in which ants nest. Previously, cavity formation processes were described; however, these reports were dependent on tissue sections of different individuals of different ages. No continuous time-course analyses were done because cavity formation occurs inside the thick tissues of highly swollen domatia. Here we observed cavity formation processes in ant plants by using X-ray computed tomography (CT) imaging and revealed previously overlooked features of cavity formation. Firstly, the cavity pore occurs at the hypocotyl base in not only gravity-dependent but also basal position-dependent manner. Secondly, the cavity forms prior to the start of short tunnel formation between the cavity and the pore. The cavity axis is parallel to the longitudinal axis of the hypocotyl; however, the short tunnel axis between the pore and cavity depends on gravity. Non-invasive CT scanning is a very powerful method to analyze deeply hidden morphogenic processes in organs.https://www.frontiersin.org/articles/10.3389/fpls.2023.1234650/fullHydonophytumRubiaceae3D imagingant plantcavitycomputed tomography
spellingShingle Hirokazu Tsukaya
Yutaka Ohtake
Cavity and entrance pore development in ant plant hypocotyls
Frontiers in Plant Science
Hydonophytum
Rubiaceae
3D imaging
ant plant
cavity
computed tomography
title Cavity and entrance pore development in ant plant hypocotyls
title_full Cavity and entrance pore development in ant plant hypocotyls
title_fullStr Cavity and entrance pore development in ant plant hypocotyls
title_full_unstemmed Cavity and entrance pore development in ant plant hypocotyls
title_short Cavity and entrance pore development in ant plant hypocotyls
title_sort cavity and entrance pore development in ant plant hypocotyls
topic Hydonophytum
Rubiaceae
3D imaging
ant plant
cavity
computed tomography
url https://www.frontiersin.org/articles/10.3389/fpls.2023.1234650/full
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