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Meselhy AG, Mosa K, Chhikara S, Kumar K, Musante C, White JC, Dhankher OP. Plasma membrane intrinsic protein OsPIP2;6 is involved in root-to-shoot arsenic translocation in rice (Oryza sativa L.). Plant Cell Rep 2024; 43:64. [PMID: 38340214 DOI: 10.1007/s00299-024-03157-3] [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: 11/25/2023] [Accepted: 01/11/2024] [Indexed: 02/12/2024]
Abstract
KEY MESSAGE This study demonstrates the crucial role of OsPIP2;6 for translocation of arsenic from roots to shoots, which can decrease arsenic accumulation in rice for improved food safety. Arsenic (As) contamination in food and water, primarily through rice consumption, poses a significant health risk due to its natural tendency to accumulate inorganic arsenic (iAs). Understanding As transport mechanisms is vital for producing As-free rice. This study investigates the role of rice plasma membrane intrinsic protein, OsPIP2;6, for AsIII tolerance and accumulation. RNAi-mediated suppression of OsPIP2;6 expression resulted in a substantial (35-65%) reduction in As accumulation in rice shoots, while root arsenic levels remained largely unaffected. Conversely, OsPIP2;6 overexpression led to 15-76% higher arsenic accumulation in shoots, with no significant change in root As content. In mature plants, RNAi suppression caused (19-26%) decrease in shoot As, with flag leaves and grains showing a 16% reduction. OsPIP2;6 expression was detected in both roots and shoots, with higher transcript levels in shoots. Localization studies revealed its presence in vascular tissues of both roots and shoots. Overall, our findings highlight OsPIP2;6's role in root-to-shoot As translocation, attributed to its specific localization in the vascular tissue of roots and leaves. This knowledge can facilitate the development of breeding programs to mitigate As accumulation in rice and other food crops for improved food safety and increasing productivity on As-contaminated soils.
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Affiliation(s)
- Ahmed G Meselhy
- Stockbridge School of Agriculture, University of Massachusetts, Amherst, MA, USA
- Department of Biotechnology, Faculty of Agriculture, Al-Azhar University, Cairo, Egypt
| | - Kareem Mosa
- Stockbridge School of Agriculture, University of Massachusetts, Amherst, MA, USA
- Department of Biotechnology, Faculty of Agriculture, Al-Azhar University, Cairo, Egypt
- Department of Applied Biology, College of Sciences, University of Sharjah, Sharjah, United Arab Emirates
| | - Sudesh Chhikara
- Stockbridge School of Agriculture, University of Massachusetts, Amherst, MA, USA
| | - Kundan Kumar
- Stockbridge School of Agriculture, University of Massachusetts, Amherst, MA, USA
- Department of Biological Sciences, Birla Institute of Technology & Science, Pilani, K. K. Birla Goa Campus, Zuarinagar, Goa, India
| | - Craig Musante
- Connecticut Agricultural Experiment Station, New Haven, CT, USA
| | - Jason C White
- Connecticut Agricultural Experiment Station, New Haven, CT, USA
| | - Om Parkash Dhankher
- Stockbridge School of Agriculture, University of Massachusetts, Amherst, MA, USA.
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Saja-Garbarz D, Libik-Konieczny M, Fellner M, Jurczyk B, Janowiak F. Silicon-induced alterations in the expression of aquaporins and antioxidant system activity in well-watered and drought-stressed oilseed rape. Plant Physiol Biochem 2022; 174:73-86. [PMID: 35151109 DOI: 10.1016/j.plaphy.2022.01.033] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Revised: 01/24/2022] [Accepted: 01/27/2022] [Indexed: 06/14/2023]
Abstract
Progressing climate change necessitates the search for solutions of plant protection against the effects of water deficit. One of these solutions could be silicon supplementation. The aim of the study was to verify the hypothesis that silicon changes aquaporin expression and antioxidant system activity in a direction which may alleviate the effects of drought stress in oilseed rape. The accumulation of BnPIP1, BnPIP2-1-7 and BnTIP1;1 aquaporins and the expression of their genes, the level of catalase, superoxide dismutase activities and hydrogen peroxide content as well as total non-enzymatic antioxidant activity were analyzed in leaf tissue from control and silicon-treated oilseed rape plants growing under well-watered and drought conditions. Silicon was applied in two forms - pure silicon and a silicon complex. It was shown that under drought conditions, both pure silicon and the silicon complex (with Fe) significantly increased the accumulation of aquaporins and improved the activity of enzymatic and non-enzymatic components of the antioxidant system, while under well-watered conditions, these effects were observed only in the case of the silicon complex. The presented study proves that silicon supplementation in oilseed rape improves the regulation of water management and contributes to the protection against oxidative stress caused by drought.
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Affiliation(s)
- Diana Saja-Garbarz
- The Franciszek Górski Institute of Plant Physiology, Polish Academy of Sciences, Niezapominajek 21, 30-239, Kraków, Poland.
| | - Marta Libik-Konieczny
- The Franciszek Górski Institute of Plant Physiology, Polish Academy of Sciences, Niezapominajek 21, 30-239, Kraków, Poland.
| | - Martin Fellner
- Group of Molecular Physiology, Laboratory of Growth Regulators, Palacky University in Olomouc & Institute of Experimental Botany, Czech Academy of Sciences, Šlechtitelů 27, Olomouc-Holice, 783 71, Czech Republic.
| | - Barbara Jurczyk
- Department of Physiology, Plant Breeding and Seed Science, University of Agriculture, Podłużna 3, 30-239, Kraków, Poland.
| | - Franciszek Janowiak
- The Franciszek Górski Institute of Plant Physiology, Polish Academy of Sciences, Niezapominajek 21, 30-239, Kraków, Poland.
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Vinnakota R, Ramakrishnan AM, Samdani A, Venugopal MA, Ram BS, Krishnan SN, Murugesan D, Sankaranarayanan K. A comparison of aquaporin function in mediating stomatal aperture gating among drought-tolerant and sensitive varieties of rice (Oryza sativa L.). Protoplasma 2016; 253:1593-1597. [PMID: 26631017 DOI: 10.1007/s00709-015-0916-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2015] [Accepted: 11/23/2015] [Indexed: 05/09/2023]
Abstract
Climate change drastically affects the cultivation of rice, and its production is affected significantly by water stress. Adaptation of a plant to water deficit conditions is orchestrated by efficient water uptake and a stringently regulated water loss. Transpiration remains the major means of water loss from plants and is mediated by microscopic pores called stomata. Stomatal aperture gating is facilitated by ion channels and aquaporins (AQPs) which regulate the turgidity of the guard cells. In a similar manner, efficient water uptake by the roots is regulated by the presence of AQPs in the plasma membrane of root cells. In this study, we compare the efficiency of transmembrane water permeability in guard cells and root protoplasts from drought-tolerant and sensitive varieties of Oryza sativa L. In this report, we studied the transmembrane osmotic water permeability (Pos) of guard cell and root protoplasts of drought-sensitive and tolerant cultivars. The guard cells isolated from the drought-sensitive lowland rice variety ADT-39 show significant low osmotic permeability than the drought-tolerant rice varieties of Anna (lowland) and Dodda Byra Nellu (DBN) (upland local land rice). There is no significant difference in relative gene expression patterns of PIPs (Plasma membrane Intrinsic Proteins "PIP1" and "PIP2" subfamilies) in guard cells isolated from ADT-39 and Anna. While the expression levels of AQP genes remain the same between ADT-39 and Anna, there is a drastic difference in their osmotic permeability in the guard cells in spite of a higher number of stomata in Anna and DBN, hinting at a more efficient gating mechanism of AQP in the stomata of the drought-tolerant varieties studied.
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Affiliation(s)
- Rajesh Vinnakota
- Ion channel Biology Laboratory, AU-KBC Research Centre, Madras Institute of Technology, Anna University, Chromepet, Chennai, 600 044, India
| | - Anantha Maharasi Ramakrishnan
- Ion channel Biology Laboratory, AU-KBC Research Centre, Madras Institute of Technology, Anna University, Chromepet, Chennai, 600 044, India
| | - A Samdani
- Ion channel Biology Laboratory, AU-KBC Research Centre, Madras Institute of Technology, Anna University, Chromepet, Chennai, 600 044, India
| | - M Anjali Venugopal
- Ion channel Biology Laboratory, AU-KBC Research Centre, Madras Institute of Technology, Anna University, Chromepet, Chennai, 600 044, India
| | - B Sri Ram
- Ion channel Biology Laboratory, AU-KBC Research Centre, Madras Institute of Technology, Anna University, Chromepet, Chennai, 600 044, India
| | - S Navaneetha Krishnan
- Ion channel Biology Laboratory, AU-KBC Research Centre, Madras Institute of Technology, Anna University, Chromepet, Chennai, 600 044, India
| | - Dhandapani Murugesan
- Regional Research Station, Tamil Nadu Agricultural University, Paiyur, Krishnagiri, 635112, India
| | - Kavitha Sankaranarayanan
- Ion channel Biology Laboratory, AU-KBC Research Centre, Madras Institute of Technology, Anna University, Chromepet, Chennai, 600 044, India.
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Xu H, Cooke JEK, Kemppainen M, Pardo AG, Zwiazek JJ. Hydraulic conductivity and aquaporin transcription in roots of trembling aspen (Populus tremuloides) seedlings colonized by Laccaria bicolor. Mycorrhiza 2016; 26:441-451. [PMID: 26861480 DOI: 10.1007/s00572-016-0681-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2015] [Accepted: 01/26/2016] [Indexed: 06/05/2023]
Abstract
Ectomycorrhizal fungi have been reported to increase root hydraulic conductivity (L pr) by altering apoplastic and plasma membrane intrinsic protein (PIP)-mediated cell-to-cell water transport pathways in associated roots, or to have little effect on root water transport, depending on the interacting species and imposed stresses. In this study, we investigated the water transport properties and PIP transcription in roots of aspen (Populus tremuloides) seedlings colonized by the wild-type strain of Laccaria bicolor and by strains overexpressing a major fungal water-transporting aquaporin JQ585595. Inoculation of aspen seedlings with L. bicolor resulted in about 30 % colonization rate of root tips, which developed dense mantle and the Hartig net that was restricted in the modified root epidermis. Transcript abundance of the aspen aquaporins PIP1;2, PIP2;1, and PIP2;2 decreased in colonized root tips. Root colonization by JQ585595-overexpressing strains had no significant impact on seedling shoot water potentials, gas exchange, or dry mass; however, it led to further decrease in transcript abundance of PIP1;2 and PIP2;3 and the significantly lower L pr than in non-inoculated roots. These results, taken together with our previous study that showed enhanced root water hydraulics of L. bicolor-colonized white spruce (Picea glauca), suggest that the impact of L. bicolor on root hydraulics varies by the ectomycorrhiza-associated tree species.
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Affiliation(s)
- Hao Xu
- Department of Renewable Resources, University of Alberta, Edmonton, T6G 2E3, Canada
| | - Janice E K Cooke
- Department of Biological Sciences, University of Alberta, Edmonton, T6G 2E9, Canada
| | - Minna Kemppainen
- Laboratorio de Micología Molecular, Departamento de Ciencia y Tecnología, Universidad Nacional de Quilmes and Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Bernal, Argentina
| | - Alejandro G Pardo
- Laboratorio de Micología Molecular, Departamento de Ciencia y Tecnología, Universidad Nacional de Quilmes and Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Bernal, Argentina
| | - Janusz J Zwiazek
- Department of Renewable Resources, University of Alberta, Edmonton, T6G 2E3, Canada.
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