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Aquaporins influence seed dormancy and germination in response to stress
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Footitt, Steven, Clewes, Rachel, Feeney, Mistianne, Finch-Savage, William E. and Frigerio, Lorenzo (2019) Aquaporins influence seed dormancy and germination in response to stress. Plant, Cell & Environment, 42 (8). pp. 2325-2339. doi:10.1111/pce.13561 ISSN 0140-7791.
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Official URL: http://dx.doi.org/10.1111/pce.13561
Abstract
Aquaporins influence water flow in plants, yet little is known of their involvement in the water‐driven process of seed germination. We therefore investigated their role in seeds in the laboratory and under field and global warming conditions. We mapped the expression of tonoplast intrinsic proteins (TIPs) during dormancy cycling and during germination under normal and water stress conditions. We found that the two key tonoplast aquaporins, TIP3;1 and TIP3;2, which have previously been implicated in water or solute transport, respectively, act antagonistically to modulate the response to abscisic acid, with TIP3;1 being a positive and TIP3;2 a negative regulator. A third isoform, TIP4;1, which is normally expressed upon completion of germination, was found to play an earlier role during water stress. Seed TIPs also contribute to the regulation of depth of primary dormancy and differences in the induction of secondary dormancy during dormancy cycling. Protein and gene expression during annual cycling under field conditions and a global warming scenario further illustrate this role. We propose that the different responses of the seed TIP contribute to mechanisms that influence dormancy status and the timing of germination under variable soil conditions.
Item Type: | Journal Article | |||||||||||||||
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Subjects: | Q Science > QK Botany Q Science > QP Physiology |
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Life Sciences (2010- ) | |||||||||||||||
Library of Congress Subject Headings (LCSH): | Aquaporins, Seeds -- Dormancy, Germination | |||||||||||||||
Journal or Publication Title: | Plant, Cell & Environment | |||||||||||||||
Publisher: | Wiley-Blackwell Publishing Ltd. | |||||||||||||||
ISSN: | 0140-7791 | |||||||||||||||
Official Date: | August 2019 | |||||||||||||||
Dates: |
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Volume: | 42 | |||||||||||||||
Number: | 8 | |||||||||||||||
Page Range: | pp. 2325-2339 | |||||||||||||||
DOI: | 10.1111/pce.13561 | |||||||||||||||
Status: | Peer Reviewed | |||||||||||||||
Publication Status: | Published | |||||||||||||||
Reuse Statement (publisher, data, author rights): | "This is the peer reviewed version of the following article: Footitt, S, Clewes, R, Feeney, M, Finch‐Savage, WE, Frigerio, L. Aquaporins influence seed dormancy and germination in response to stress. Plant Cell Environ. 2019, which has been published in final form at https://doi.org/10.1111/pce.13561. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions." | |||||||||||||||
Access rights to Published version: | Open Access (Creative Commons) | |||||||||||||||
Date of first compliant deposit: | 16 April 2019 | |||||||||||||||
Date of first compliant Open Access: | 5 August 2019 | |||||||||||||||
RIOXX Funder/Project Grant: |
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