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Suslov MA. Dynamics of intercellular water transfer in the roots of intact Zea mays L. plants under elevated concentrations of atmospheric CO 2. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2020; 151:516-525. [PMID: 32305818 DOI: 10.1016/j.plaphy.2020.04.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2019] [Revised: 03/10/2020] [Accepted: 04/06/2020] [Indexed: 06/11/2023]
Abstract
In this study, the effect of atmospheric carbon dioxide concentration increase on the dynamics of radial intercellular water transfer in the root suction zone of intact maize plants was evaluated. To this end, a unique growth chamber, associated with 1H NMR PGMF (proton nuclear magnetic resonance with a pulsed gradient of the magnetic field) equipment, was used. As the atmospheric CO2 concentration increased up to 800 ppm and 1200 ppm, and the intensity of water transfer in the roots significantly decreased. The average effective water diffusion coefficient (Def) and the water permeability in root cells (P) decreased by approximately 30-35% within 5-6 h after the increase in CO2 concentration. At a higher concentration of CO2, 1200 ppm, the rate of decrease in water permeability increased. After a day of exposure to elevated CO2, the intensity of water transfer was partially restored but remained below the control level (before CO2 enrichment) over the next 7 days. Inhibitory analysis showed that root cell aquaporins (AQPs) made a significant contribution to the observed decrease in the intensity of water transport in the roots. The decrease in water permeability of root cells under elevated CO2 concentrations possibly occurs due to the regulatory decrease in water conductivity of AQPs via shoot-to-root long-distance signaling.
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Affiliation(s)
- M A Suslov
- Kazan Institute of Biochemistry and Biophysics, FRC Kazan Scientific Center, Russian Academy of Sciences, P.O. Box 30, Lobachevskogo 2/31 St., Kazan, Russia, 420111.
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Umnajkitikorn K, Sade N, Rubio Wilhelmi MDM, Gilbert ME, Blumwald E. Silencing of OsCV (chloroplast vesiculation) maintained photorespiration and N assimilation in rice plants grown under elevated CO 2. PLANT, CELL & ENVIRONMENT 2020; 43:920-933. [PMID: 31953871 DOI: 10.1111/pce.13723] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2018] [Revised: 12/19/2019] [Accepted: 01/13/2020] [Indexed: 05/15/2023]
Abstract
High CO2 concentrations stimulate net photosynthesis by increasing CO2 substrate availability for Rubisco, simultaneously suppressing photorespiration. Previously, we reported that silencing the chloroplast vesiculation (cv) gene in rice increased source fitness, through the maintenance of chloroplast stability and the expression of photorespiration-associated genes. Because high atmospheric CO2 conditions diminished photorespiration, we tested whether CV silencing might be a viable strategy to improve the effects of high CO2 on grain yield and N assimilation in rice. Under elevated CO2 , OsCV expression was induced, and OsCV was targeted to peroxisomes where it facilitated the removal of OsPEX11-1 from the peroxisome and delivered it to the vacuole for degradation. This process correlated well with the reduction in the number of peroxisomes, the decreased catalase activity and the increased H2 O2 content in wild-type plants under elevated CO2 . At elevated CO2 , CV-silenced rice plants maintained peroxisome proliferation and photorespiration and displayed higher N assimilation than wild-type plants. This was supported by higher activity of enzymes involved in NO3- and NH4+ assimilation and higher total and seed protein contents. Co-immunoprecipitation of OsCV-interacting proteins suggested that, similar to its role in chloroplast protein turnover, OsCV acted as a scaffold, binding peroxisomal proteins.
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Affiliation(s)
- Kamolchanok Umnajkitikorn
- Department of Plant Sciences, University of California, Davis, CA
- School of Crop Production Technology, Institute of Agricultural Technology, Nakhon Ratchasima, Thailand
| | - Nir Sade
- Department of Molecular Biology & Ecology of Plants, Faculty of Life Sciences, Tel Aviv University, Tel Aviv, Israel
| | | | | | - Eduardo Blumwald
- Department of Plant Sciences, University of California, Davis, CA
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Arifuzzaman M, Günal S, Bungartz A, Muzammil S, P. Afsharyan N, Léon J, Naz AA. Genetic Mapping Reveals Broader Role of Vrn-H3 Gene in Root and Shoot Development beyond Heading in Barley. PLoS One 2016; 11:e0158718. [PMID: 27442506 PMCID: PMC4956229 DOI: 10.1371/journal.pone.0158718] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2015] [Accepted: 06/21/2016] [Indexed: 11/18/2022] Open
Abstract
The aim of the present study was to dissect the genetic inheritance and interplay of root, shoot and heading attributes for a better understanding of these traits in crop production. For this, we utilized quantitative trait loci (QTL) and candidate gene analysis approach using a second filial (F2) population originated from a cross between spring cultivar Cheri and wild barley accession ICB181160. The F2 population comprising 182 plants was phenotyped for root dry weight (RDW), root volume (RV), root length (RL) and shoot dry weight (SDW), tiller number per plant (TIL) and days to heading (HEA). In parallel, this population was genotyped using polymerase chain reaction (PCR) based cleaved amplified polymorphic sequence (CAPS) markers distributed across the whole genome. Marker by trait analysis revealed 16 QTL for root and shoot traits localized on chromosomes 1H, 3H, 4H, 5H and 7H. The strongest and a common QTL effect for root, shoot and heading traits was identified on chromosome 7H at the putative region of Vrn-H3 gene. Later, we have established PCR based gene specific marker HvVrnH3 revealing polymorphism for early heading Vrn-H3 allele in Cheri and late heading allele vrn-H3 in ICB181160. Genotyping of these alleles revealed a clear co-segregation of early heading Vrn-H3 allele with lower root and shoot attributes, while late heading vrn-H3 allele with more TIL and higher root biomass suggesting a primary insight on the function of Vrn-H3 gene beyond flowering. Genetic interactions of vernalization genes Vrn-H3 with Vrn-H2 and Vrn-H1 also suggested the major role of Vrn-H3 alleles in determining root and shoot trait variations in barley. We believe, these data provide an opportunity for further research to test a precise significance of early heading on yield components and root associated sustainability in crops like barley and wheat.
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Affiliation(s)
- Md. Arifuzzaman
- University of Bonn, Institute of Crop Science and Resource Conservation, Crop Genetics and Biotechnology Unit, Katzenburgweg 5, 53115, Bonn, Germany
| | - Süleyman Günal
- University of Bonn, Institute of Crop Science and Resource Conservation, Crop Genetics and Biotechnology Unit, Katzenburgweg 5, 53115, Bonn, Germany
| | - Annemarie Bungartz
- University of Bonn, Institute of Crop Science and Resource Conservation, Crop Genetics and Biotechnology Unit, Katzenburgweg 5, 53115, Bonn, Germany
| | - Shumaila Muzammil
- University of Bonn, Institute of Crop Science and Resource Conservation, Crop Genetics and Biotechnology Unit, Katzenburgweg 5, 53115, Bonn, Germany
| | - Nazanin P. Afsharyan
- University of Bonn, Institute of Crop Science and Resource Conservation, Crop Genetics and Biotechnology Unit, Katzenburgweg 5, 53115, Bonn, Germany
| | - Jens Léon
- University of Bonn, Institute of Crop Science and Resource Conservation, Crop Genetics and Biotechnology Unit, Katzenburgweg 5, 53115, Bonn, Germany
| | - Ali Ahmad Naz
- University of Bonn, Institute of Crop Science and Resource Conservation, Crop Genetics and Biotechnology Unit, Katzenburgweg 5, 53115, Bonn, Germany
- * E-mail:
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Engineer CB, Hashimoto-Sugimoto M, Negi J, Israelsson-Nordström M, Azoulay-Shemer T, Rappel WJ, Iba K, Schroeder JI. CO2 Sensing and CO2 Regulation of Stomatal Conductance: Advances and Open Questions. TRENDS IN PLANT SCIENCE 2016; 21:16-30. [PMID: 26482956 PMCID: PMC4707055 DOI: 10.1016/j.tplants.2015.08.014] [Citation(s) in RCA: 133] [Impact Index Per Article: 16.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2015] [Revised: 08/24/2015] [Accepted: 08/27/2015] [Indexed: 05/18/2023]
Abstract
Guard cells form epidermal stomatal gas-exchange valves in plants and regulate the aperture of stomatal pores in response to changes in the carbon dioxide (CO2) concentration ([CO2]) in leaves. Moreover, the development of stomata is repressed by elevated CO2 in diverse plant species. Evidence suggests that plants can sense [CO2] changes via guard cells and via mesophyll tissues in mediating stomatal movements. We review new discoveries and open questions on mechanisms mediating CO2-regulated stomatal movements and CO2 modulation of stomatal development, which together function in the CO2 regulation of stomatal conductance and gas exchange in plants. Research in this area is timely in light of the necessity of selecting and developing crop cultivars that perform better in a shifting climate.
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Affiliation(s)
- Cawas B Engineer
- Division of Biological Sciences, Cell and Developmental Biology Section and Center for Food & Fuel for the 21st Century, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093-0116, USA
| | - Mimi Hashimoto-Sugimoto
- Department of Biology, Faculty of Sciences, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Juntaro Negi
- Department of Biology, Faculty of Sciences, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Maria Israelsson-Nordström
- Umeå Plant Science Center, Department of Forest Genetics and Plant Physiology, Swedish University of Agricultural Sciences, SE-901 83 Umeå, Sweden
| | - Tamar Azoulay-Shemer
- Division of Biological Sciences, Cell and Developmental Biology Section and Center for Food & Fuel for the 21st Century, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093-0116, USA
| | - Wouter-Jan Rappel
- Division of Biological Sciences, Cell and Developmental Biology Section and Center for Food & Fuel for the 21st Century, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093-0116, USA
| | - Koh Iba
- Department of Biology, Faculty of Sciences, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Julian I Schroeder
- Division of Biological Sciences, Cell and Developmental Biology Section and Center for Food & Fuel for the 21st Century, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093-0116, USA.
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Rewald B, Godbold DL, Falik O, Rachmilevitch S. Root and rhizosphere processes-high time to dig deeper. FRONTIERS IN PLANT SCIENCE 2014; 5:278. [PMID: 24971085 PMCID: PMC4054653 DOI: 10.3389/fpls.2014.00278] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2014] [Accepted: 05/28/2014] [Indexed: 06/03/2023]
Affiliation(s)
- Boris Rewald
- Department of Forest and Soil Sciences, Forest Ecology, University of Natural Resources and Life Sciences Vienna (BOKU)Vienna, Austria
| | - Douglas L. Godbold
- Department of Forest and Soil Sciences, Forest Ecology, University of Natural Resources and Life Sciences Vienna (BOKU)Vienna, Austria
| | - Omer Falik
- Mitrani Department of Desert Ecology, Blaustein Institutes for Desert Research, Ben-Gurion University of the NegevMidreshet Ben-Gurion, Israel
| | - Shimon Rachmilevitch
- Blaustein Institutes for Desert Research, French Associates Institute for Agriculture and Biotechnology of Drylands, Ben-Gurion University of the NegevMidreshet Ben-Gurion, Israel
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