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Grünhofer P, Heimerich I, Pohl S, Oertel M, Meng H, Zi L, Lucignano K, Bokhari SNH, Guo Y, Li R, Lin J, Fladung M, Kreszies T, Stöcker T, Schoof H, Schreiber L. Suberin deficiency and its effect on the transport physiology of young poplar roots. New Phytol 2024; 242:137-153. [PMID: 38366280 DOI: 10.1111/nph.19588] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2023] [Accepted: 01/22/2024] [Indexed: 02/18/2024]
Abstract
The precise functions of suberized apoplastic barriers in root water and nutrient transport physiology have not fully been elucidated. While lots of research has been performed with mutants of Arabidopsis, little to no data are available for mutants of agricultural crop or tree species. By employing a combined set of physiological, histochemical, analytical, and transport physiological methods as well as RNA-sequencing, this study investigated the implications of remarkable CRISPR/Cas9-induced suberization defects in young roots of the economically important gray poplar. While barely affecting overall plant development, contrary to literature-based expectations significant root suberin reductions of up to 80-95% in four independent mutants were shown to not evidently affect the root hydraulic conductivity during non-stress conditions. In addition, subliminal iron deficiency symptoms and increased translocation of a photosynthesis inhibitor as well as NaCl highlight the involvement of suberin in nutrient transport physiology. The multifaceted nature of the root hydraulic conductivity does not allow drawing simplified conclusions such as that the suberin amount must always be correlated with the water transport properties of roots. However, the decreased masking of plasma membrane surface area could facilitate the uptake but also leakage of beneficial and harmful solutes.
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Affiliation(s)
- Paul Grünhofer
- Department of Ecophysiology, Institute of Cellular and Molecular Botany, University of Bonn, Kirschallee 1, 53115, Bonn, Germany
| | - Ines Heimerich
- Department of Ecophysiology, Institute of Cellular and Molecular Botany, University of Bonn, Kirschallee 1, 53115, Bonn, Germany
| | - Svenja Pohl
- Department of Ecophysiology, Institute of Cellular and Molecular Botany, University of Bonn, Kirschallee 1, 53115, Bonn, Germany
| | - Marlene Oertel
- Department of Ecophysiology, Institute of Cellular and Molecular Botany, University of Bonn, Kirschallee 1, 53115, Bonn, Germany
| | - Hongjun Meng
- Department of Ecophysiology, Institute of Cellular and Molecular Botany, University of Bonn, Kirschallee 1, 53115, Bonn, Germany
| | - Lin Zi
- Department of Ecophysiology, Institute of Cellular and Molecular Botany, University of Bonn, Kirschallee 1, 53115, Bonn, Germany
| | - Kevin Lucignano
- Department of Ecophysiology, Institute of Cellular and Molecular Botany, University of Bonn, Kirschallee 1, 53115, Bonn, Germany
| | - Syed Nadeem Hussain Bokhari
- Department Plant Biophysics and Biochemistry, Institute of Plant Molecular Biology, Czech Academy of Sciences, Biology Centre, Branišovská 31/1160, CZ-37005, České Budějovice, Czech Republic
| | - Yayu Guo
- State Key Laboratory of Tree Genetics and Breeding, College of Biological Sciences and Technology, Beijing Forestry University, Beijing, 100083, China
| | - Ruili Li
- State Key Laboratory of Tree Genetics and Breeding, College of Biological Sciences and Technology, Beijing Forestry University, Beijing, 100083, China
| | - Jinxing Lin
- State Key Laboratory of Tree Genetics and Breeding, College of Biological Sciences and Technology, Beijing Forestry University, Beijing, 100083, China
| | - Matthias Fladung
- Thünen Institute of Forest Genetics, Sieker Landstraße 2, 22927, Grosshansdorf, Germany
| | - Tino Kreszies
- Department of Crop Sciences, Plant Nutrition and Crop Physiology, University of Göttingen, Carl-Sprengel-Weg 1, 37075, Göttingen, Germany
| | - Tyll Stöcker
- Department of Crop Bioinformatics, Institute of Crop Science and Resource Conservation, University of Bonn, Katzenburgweg 2, 53115, Bonn, Germany
| | - Heiko Schoof
- Department of Crop Bioinformatics, Institute of Crop Science and Resource Conservation, University of Bonn, Katzenburgweg 2, 53115, Bonn, Germany
| | - Lukas Schreiber
- Department of Ecophysiology, Institute of Cellular and Molecular Botany, University of Bonn, Kirschallee 1, 53115, Bonn, Germany
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