1
|
Upadhyay SK. CPK12 and Ca 2+-mediated hypoxia signaling. PLANT SIGNALING & BEHAVIOR 2023; 18:2273593. [PMID: 37875477 PMCID: PMC10761129 DOI: 10.1080/15592324.2023.2273593] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Accepted: 10/16/2023] [Indexed: 10/26/2023]
Abstract
Hypoxia triggers reactive oxygen species (ROS)-induced elevation in cytoplasmic calcium (Ca2+) in the plant cells. Calcium-dependent protein kinase 12 (CPK12) acts as a sensor to recognize the Ca2+ signature and is activated by autophosphorylation. Then, the CPK12 moves into the nucleus with the help of phosphatidic acid (PA) and phosphorylates ERF-VII family proteins that activate hypoxia signaling and response. The study provides a novel mechanism of hypoxia signaling in plants. Moreover, the mechanism of hypoxia-specific Ca2+ signature generation remains elusive.
Collapse
|
2
|
Martins TS, Da-Silva CJ, Shabala S, Striker GG, Carvalho IR, de Oliveira ACB, do Amarante L. Understanding plant responses to saline waterlogging: insights from halophytes and implications for crop tolerance. PLANTA 2023; 259:24. [PMID: 38108902 DOI: 10.1007/s00425-023-04275-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Accepted: 10/30/2023] [Indexed: 12/19/2023]
Abstract
MAIN CONCLUSION Saline and wet environments stress most plants, reducing growth and yield. Halophytes adapt with ion regulation, energy maintenance, and antioxidants. Understanding these mechanisms aids in breeding resilient crops for climate change. Waterlogging and salinity are two abiotic stresses that have a major negative impact on crop growth and yield. These conditions cause osmotic, ionic, and oxidative stress, as well as energy deprivation, thus impairing plant growth and development. Although few crop species can tolerate the combination of salinity and waterlogging, halophytes are plant species that exhibit high tolerance to these conditions due to their morphological, anatomical, and metabolic adaptations. In this review, we discuss the main mechanisms employed by plants exposed to saline waterlogging, intending to understand the mechanistic basis of their ion homeostasis. We summarize the knowledge of transporters and channels involved in ion accumulation and exclusion, and how they are modulated to prevent cytosolic toxicity. In addition, we discuss how reactive oxygen species production and cell signaling enhance ion transport and aerenchyma formation, and how plants exposed to saline waterlogging can control oxidative stress. We also address the morphological and anatomical modifications that plants undergo in response to combined stress, including aerenchyma formation, root porosity, and other traits that help to mitigate stress. Furthermore, we discuss the peculiarities of halophyte plants and their features that can be leveraged to improve crop yields in areas prone to saline waterlogging. This review provides valuable insights into the mechanisms of plant adaptation to saline waterlogging thus paving the path for future research on crop breeding and management strategies.
Collapse
Affiliation(s)
- Tamires S Martins
- Departamento de Botânica, Universidade Federal de Pelotas, Capão Do Leão, Brazil.
- Laboratory of Crop Physiology (LCroP), Department of Plant Biology, Institute of Biology, University of Campinas (UNICAMP), Campinas, SP, Brazil.
| | - Cristiane J Da-Silva
- Departamento de Botânica, Universidade Federal de Pelotas, Capão Do Leão, Brazil.
- Department of Horticultural Science, NC State University, Raleigh, USA.
| | - Sergey Shabala
- School of Biological Science, University of Western Australia, Perth, Australia
- International Research Centre for Environmental Membrane Biology, Foshan University, Foshan, China
- Tasmanian Institute of Agriculture, University of Tasmania, Hobart, Australia
| | - Gustavo G Striker
- IFEVA, Universidad de Buenos Aires, CONICET, Facultad de Agronomía, Buenos Aires, Argentina
- School of Agriculture and Environment, Faculty of Science, The University of Western Australia, Crawley, Australia
| | - Ivan R Carvalho
- Departamento de Estudos Agrários, Universidade Regional do Noroeste do Estado do Rio Grande do Sul, Ijuí, Brazil
| | | | - Luciano do Amarante
- Departamento de Botânica, Universidade Federal de Pelotas, Capão Do Leão, Brazil
| |
Collapse
|
3
|
Sandalio LM, Espinosa J, Shabala S, León J, Romero-Puertas MC. Reactive oxygen species- and nitric oxide-dependent regulation of ion and metal homeostasis in plants. JOURNAL OF EXPERIMENTAL BOTANY 2023; 74:5970-5988. [PMID: 37668424 PMCID: PMC10575707 DOI: 10.1093/jxb/erad349] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Accepted: 09/04/2023] [Indexed: 09/06/2023]
Abstract
Deterioration and impoverishment of soil, caused by environmental pollution and climate change, result in reduced crop productivity. To adapt to hostile soils, plants have developed a complex network of factors involved in stress sensing, signal transduction, and adaptive responses. The chemical properties of reactive oxygen species (ROS) and reactive nitrogen species (RNS) allow them to participate in integrating the perception of external signals by fine-tuning protein redox regulation and signal transduction, triggering specific gene expression. Here, we update and summarize progress in understanding the mechanistic basis of ROS and RNS production at the subcellular level in plants and their role in the regulation of ion channels/transporters at both transcriptional and post-translational levels. We have also carried out an in silico analysis of different redox-dependent modifications of ion channels/transporters and identified cysteine and tyrosine targets of nitric oxide in metal transporters. Further, we summarize possible ROS- and RNS-dependent sensors involved in metal stress sensing, such as kinases and phosphatases, as well as some ROS/RNS-regulated transcription factors that could be involved in metal homeostasis. Understanding ROS- and RNS-dependent signaling events is crucial to designing new strategies to fortify crops and improve plant tolerance of nutritional imbalance and metal toxicity.
Collapse
Affiliation(s)
- Luisa M Sandalio
- Stress, Development and Signaling in Plants, Estación Experimental del Zaidín, Granada, Spain
| | - Jesús Espinosa
- Stress, Development and Signaling in Plants, Estación Experimental del Zaidín, Granada, Spain
| | - Sergey Shabala
- School of Biological Science, University of Western Australia, Crawley, WA 6009, Australia
- International Research Centre for Environmental Membrane Biology, Foshan University, Foshan, China
| | - José León
- Institute of Plant Molecular and Cellular Biology (CSIC-UPV), Valencia, Spain
| | - María C Romero-Puertas
- Stress, Development and Signaling in Plants, Estación Experimental del Zaidín, Granada, Spain
| |
Collapse
|
4
|
Sodium Accumulation in Infected Cells and Ion Transporters Mistargeting in Nodules of Medicago truncatula: Two Ugly Items That Hinder Coping with Salt Stress Effects. Int J Mol Sci 2022; 23:ijms231810618. [PMID: 36142539 PMCID: PMC9505113 DOI: 10.3390/ijms231810618] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2022] [Revised: 09/05/2022] [Accepted: 09/06/2022] [Indexed: 11/17/2022] Open
Abstract
The maintenance of intracellular nitrogen-fixing bacteria causes changes in proteins’ location and in gene expression that may be detrimental to the host cell fitness. We hypothesized that the nodule’s high vulnerability toward salt stress might be due to alterations in mechanisms involved in the exclusion of Na+ from the host cytoplasm. Confocal and electron microscopy immunolocalization analyses of Na+/K+ exchangers in the root nodule showed the plasma membrane (MtNHX7) and endosome/tonoplast (MtNHX6) signal in non-infected cells; however, in mature infected cells the proteins were depleted from their target membranes and expelled to vacuoles. This mistargeting suggests partial loss of the exchanger’s functionality in these cells. In the mature part of the nodule 7 of the 20 genes encoding ion transporters, channels, and Na+/K+ exchangers were either not expressed or substantially downregulated. In nodules from plants subjected to salt treatments, low temperature-scanning electron microscopy and X-ray microanalysis revealed the accumulation of 5–6 times more Na+ per infected cell versus non-infected one. Hence, the infected cells’ inability to withstand the salt may be the integral result of preexisting defects in the localization of proteins involved in Na+ exclusion and the reduced expression of key genes of ion homeostasis, resulting in premature senescence and termination of symbiosis.
Collapse
|
5
|
Li Y, Liu Y, Jin L, Peng R. Crosstalk between Ca 2+ and Other Regulators Assists Plants in Responding to Abiotic Stress. PLANTS (BASEL, SWITZERLAND) 2022; 11:plants11101351. [PMID: 35631776 PMCID: PMC9148064 DOI: 10.3390/plants11101351] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Revised: 05/17/2022] [Accepted: 05/18/2022] [Indexed: 05/08/2023]
Abstract
Plants have evolved many strategies for adaptation to extreme environments. Ca2+, acting as an important secondary messenger in plant cells, is a signaling molecule involved in plants' response and adaptation to external stress. In plant cells, almost all kinds of abiotic stresses are able to raise cytosolic Ca2+ levels, and the spatiotemporal distribution of this molecule in distant cells suggests that Ca2+ may be a universal signal regulating different kinds of abiotic stress. Ca2+ is used to sense and transduce various stress signals through its downstream calcium-binding proteins, thereby inducing a series of biochemical reactions to adapt to or resist various stresses. This review summarizes the roles and molecular mechanisms of cytosolic Ca2+ in response to abiotic stresses such as drought, high salinity, ultraviolet light, heavy metals, waterlogging, extreme temperature and wounding. Furthermore, we focused on the crosstalk between Ca2+ and other signaling molecules in plants suffering from extreme environmental stress.
Collapse
|
6
|
Solis CA, Yong MT, Zhou M, Venkataraman G, Shabala L, Holford P, Shabala S, Chen ZH. Evolutionary Significance of NHX Family and NHX1 in Salinity Stress Adaptation in the Genus Oryza. Int J Mol Sci 2022; 23:ijms23042092. [PMID: 35216206 PMCID: PMC8879705 DOI: 10.3390/ijms23042092] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Revised: 01/28/2022] [Accepted: 02/07/2022] [Indexed: 02/06/2023] Open
Abstract
Rice (Oryza sativa), a staple crop for a substantial part of the world’s population, is highly sensitive to soil salinity; however, some wild Oryza relatives can survive in highly saline environments. Sodium/hydrogen antiporter (NHX) family members contribute to Na+ homeostasis in plants and play a major role in conferring salinity tolerance. In this study, we analyzed the evolution of NHX family members using phylogeny, conserved domains, tertiary structures, expression patterns, and physiology of cultivated and wild Oryza species to decipher the role of NHXs in salt tolerance in Oryza. Phylogenetic analysis showed that the NHX family can be classified into three subfamilies directly related to their subcellular localization: endomembrane, plasma membrane, and tonoplast (vacuolar subfamily, vNHX1). Phylogenetic and structural analysis showed that vNHX1s have evolved from streptophyte algae (e.g., Klebsormidium nitens) and are abundant and highly conserved in all major land plant lineages, including Oryza. Moreover, we showed that tissue tolerance is a crucial trait conferring tolerance to salinity in wild rice species. Higher Na+ accumulation and reduced Na+ effluxes in leaf mesophyll were observed in the salt-tolerant wild rice species O. alta, O. latifolia, and O. coarctata. Among the key genes affecting tissue tolerance, expression of NHX1 and SOS1/NHX7 exhibited significant correlation with salt tolerance among the rice species and cultivars. This study provides insights into the evolutionary origin of plant NHXs and their role in tissue tolerance of Oryza species and facilitates the inclusion of this trait during the development of salinity-tolerant rice cultivars.
Collapse
Affiliation(s)
- Celymar Angela Solis
- School of Science, Western Sydney University, Penrith, NSW 2751, Australia; (C.A.S.); (M.-T.Y.); (P.H.)
- Tasmanian Institute of Agriculture, University of Tasmania, Hobart, TAS 7001, Australia; (M.Z.); (L.S.)
| | - Miing-Tiem Yong
- School of Science, Western Sydney University, Penrith, NSW 2751, Australia; (C.A.S.); (M.-T.Y.); (P.H.)
| | - Meixue Zhou
- Tasmanian Institute of Agriculture, University of Tasmania, Hobart, TAS 7001, Australia; (M.Z.); (L.S.)
| | - Gayatri Venkataraman
- Plant Molecular Biology Laboratory, M. S. Swaminathan Research Foundation, III Cross Street, Taramani Institutional Area, Chennai 600113, India;
| | - Lana Shabala
- Tasmanian Institute of Agriculture, University of Tasmania, Hobart, TAS 7001, Australia; (M.Z.); (L.S.)
| | - Paul Holford
- School of Science, Western Sydney University, Penrith, NSW 2751, Australia; (C.A.S.); (M.-T.Y.); (P.H.)
| | - Sergey Shabala
- Tasmanian Institute of Agriculture, University of Tasmania, Hobart, TAS 7001, Australia; (M.Z.); (L.S.)
- International Research Centre for Environmental Membrane Biology, Foshan University, Foshan 528000, China
- Correspondence: (S.S.); (Z.-H.C.); Tel.: +61-245-701-934 (Z.-H.C.)
| | - Zhong-Hua Chen
- School of Science, Western Sydney University, Penrith, NSW 2751, Australia; (C.A.S.); (M.-T.Y.); (P.H.)
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith, NSW 2751, Australia
- Correspondence: (S.S.); (Z.-H.C.); Tel.: +61-245-701-934 (Z.-H.C.)
| |
Collapse
|
7
|
Yong MT, Solis CA, Amatoury S, Sellamuthu G, Rajakani R, Mak M, Venkataraman G, Shabala L, Zhou M, Ghannoum O, Holford P, Huda S, Shabala S, Chen ZH. Proto Kranz-like leaf traits and cellular ionic regulation are associated with salinity tolerance in a halophytic wild rice. STRESS BIOLOGY 2022; 2:8. [PMID: 37676369 PMCID: PMC10441962 DOI: 10.1007/s44154-021-00016-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2021] [Accepted: 11/17/2021] [Indexed: 09/08/2023]
Abstract
Species of wild rice (Oryza spp.) possess a wide range of stress tolerance traits that can be potentially utilized in breeding climate-resilient cultivated rice cultivars (Oryza sativa) thereby aiding global food security. In this study, we conducted a greenhouse trial to evaluate the salinity tolerance of six wild rice species, one cultivated rice cultivar (IR64) and one landrace (Pokkali) using a range of electrophysiological, imaging, and whole-plant physiological techniques. Three wild species (O. latifolia, O. officinalis and O. coarctata) were found to possess superior salinity stress tolerance. The underlying mechanisms, however, were strikingly different. Na+ accumulation in leaves of O. latifolia, O. officinalis and O. coarctata were significantly higher than the tolerant landrace, Pokkali. Na+ accumulation in mesophyll cells was only observed in O. coarctata, suggesting that O. officinalis and O. latifolia avoid Na+ accumulation in mesophyll by allocating Na+ to other parts of the leaf. The finding also suggests that O. coarctata might be able to employ Na+ as osmolyte without affecting its growth. Further study of Na+ allocation in leaves will be helpful to understand the mechanisms of Na+ accumulation in these species. In addition, O. coarctata showed Proto Kranz-like leaf anatomy (enlarged bundle sheath cells and lower numbers of mesophyll cells), and higher expression of C4-related genes (e.g., NADPME, PPDK) and was a clear outlier with respect to salinity tolerance among the studied wild and cultivated Oryza species. The unique phylogenetic relationship of O. coarctata with C4 grasses suggests the potential of this species for breeding rice with high photosynthetic rate under salinity stress in the future.
Collapse
Affiliation(s)
- Miing-Tiem Yong
- School of Science, Western Sydney University, Penrith, NSW, 2751, Australia
| | - Celymar Angela Solis
- School of Science, Western Sydney University, Penrith, NSW, 2751, Australia
- Tasmanian Institute of Agriculture, College of Science and Engineering, University of Tasmania, Hobart, Tasmania, 7001, Australia
| | - Samuel Amatoury
- School of Science, Western Sydney University, Penrith, NSW, 2751, Australia
| | - Gothandapani Sellamuthu
- Plant Molecular Biology Laboratory, M. S. Swaminathan Research Foundation, III Cross Street, Taramani Institutional Area, -600113, Chennai, India
| | - Raja Rajakani
- Plant Molecular Biology Laboratory, M. S. Swaminathan Research Foundation, III Cross Street, Taramani Institutional Area, -600113, Chennai, India
| | - Michelle Mak
- School of Science, Western Sydney University, Penrith, NSW, 2751, Australia
| | - Gayatri Venkataraman
- Plant Molecular Biology Laboratory, M. S. Swaminathan Research Foundation, III Cross Street, Taramani Institutional Area, -600113, Chennai, India
| | - Lana Shabala
- Tasmanian Institute of Agriculture, College of Science and Engineering, University of Tasmania, Hobart, Tasmania, 7001, Australia
| | - Meixue Zhou
- Tasmanian Institute of Agriculture, College of Science and Engineering, University of Tasmania, Hobart, Tasmania, 7001, Australia
| | - Oula Ghannoum
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith, NSW, 2751, Australia
| | - Paul Holford
- School of Science, Western Sydney University, Penrith, NSW, 2751, Australia
| | - Samsul Huda
- School of Science, Western Sydney University, Penrith, NSW, 2751, Australia
| | - Sergey Shabala
- Tasmanian Institute of Agriculture, College of Science and Engineering, University of Tasmania, Hobart, Tasmania, 7001, Australia.
- International Research Centre for Environmental Membrane Biology, Foshan University, Foshan, 528000, China.
| | - Zhong-Hua Chen
- School of Science, Western Sydney University, Penrith, NSW, 2751, Australia.
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith, NSW, 2751, Australia.
| |
Collapse
|
8
|
Jethva J, Schmidt RR, Sauter M, Selinski J. Try or Die: Dynamics of Plant Respiration and How to Survive Low Oxygen Conditions. PLANTS (BASEL, SWITZERLAND) 2022; 11:plants11020205. [PMID: 35050092 PMCID: PMC8780655 DOI: 10.3390/plants11020205] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Revised: 01/07/2022] [Accepted: 01/11/2022] [Indexed: 05/09/2023]
Abstract
Fluctuations in oxygen (O2) availability occur as a result of flooding, which is periodically encountered by terrestrial plants. Plant respiration and mitochondrial energy generation rely on O2 availability. Therefore, decreased O2 concentrations severely affect mitochondrial function. Low O2 concentrations (hypoxia) induce cellular stress due to decreased ATP production, depletion of energy reserves and accumulation of metabolic intermediates. In addition, the transition from low to high O2 in combination with light changes-as experienced during re-oxygenation-leads to the excess formation of reactive oxygen species (ROS). In this review, we will update our current knowledge about the mechanisms enabling plants to adapt to low-O2 environments, and how to survive re-oxygenation. New insights into the role of mitochondrial retrograde signaling, chromatin modification, as well as moonlighting proteins and mitochondrial alternative electron transport pathways (and their contribution to low O2 tolerance and survival of re-oxygenation), are presented.
Collapse
Affiliation(s)
- Jay Jethva
- Department of Plant Developmental Biology and Plant Physiology, Faculty of Mathematics and Natural Sciences, Botanical Institute, Christian-Albrechts University, D-24118 Kiel, Germany; (J.J.); (M.S.)
| | - Romy R. Schmidt
- Department of Plant Biotechnology, Faculty of Biology, University of Bielefeld, D-33615 Bielefeld, Germany;
| | - Margret Sauter
- Department of Plant Developmental Biology and Plant Physiology, Faculty of Mathematics and Natural Sciences, Botanical Institute, Christian-Albrechts University, D-24118 Kiel, Germany; (J.J.); (M.S.)
| | - Jennifer Selinski
- Department of Plant Cell Biology, Botanical Institute, Faculty of Mathematics and Natural Sciences, Christian-Albrechts University, D-24118 Kiel, Germany
- Correspondence: ; Tel.: +49-(0)431-880-4245
| |
Collapse
|
9
|
Xu B, Sai N, Gilliham M. The emerging role of GABA as a transport regulator and physiological signal. PLANT PHYSIOLOGY 2021; 187:2005-2016. [PMID: 35235673 PMCID: PMC8644139 DOI: 10.1093/plphys/kiab347] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Accepted: 07/10/2021] [Indexed: 05/07/2023]
Abstract
While the proposal that γ-aminobutyric acid (GABA) acts a signal in plants is decades old, a signaling mode of action for plant GABA has been unveiled only relatively recently. Here, we review the recent research that demonstrates how GABA regulates anion transport through aluminum-activated malate transporters (ALMTs) and speculation that GABA also targets other proteins. The ALMT family of anion channels modulates multiple physiological processes in plants, with many members still to be characterized, opening up the possibility that GABA has broad regulatory roles in plants. We focus on the role of GABA in regulating pollen tube growth and stomatal pore aperture, and we speculate on its role in long-distance signaling and how it might be involved in cross talk with hormonal signals. We show that in barley (Hordeum vulgare), guard cell opening is regulated by GABA, as it is in Arabidopsis (Arabidopsis thaliana), to regulate water use efficiency, which impacts drought tolerance. We also discuss the links between glutamate and GABA in generating signals in plants, particularly related to pollen tube growth, wounding, and long-distance electrical signaling, and explore potential interactions of GABA signals with hormones, such as abscisic acid, jasmonic acid, and ethylene. We conclude by postulating that GABA encodes a signal that links plant primary metabolism to physiological status to fine tune plant responses to the environment.
Collapse
Affiliation(s)
- Bo Xu
- Plant Transport and Signalling Lab, ARC Centre of Excellence in Plant Energy Biology, Waite Research Institute, Glen Osmond, South Australia 5064, Australia
- School of Agriculture, Food and Wine, University of Adelaide, Glen Osmond, South Australia 5064, Australia
- Author for communication:
| | - Na Sai
- Plant Transport and Signalling Lab, ARC Centre of Excellence in Plant Energy Biology, Waite Research Institute, Glen Osmond, South Australia 5064, Australia
- School of Agriculture, Food and Wine, University of Adelaide, Glen Osmond, South Australia 5064, Australia
| | - Matthew Gilliham
- Plant Transport and Signalling Lab, ARC Centre of Excellence in Plant Energy Biology, Waite Research Institute, Glen Osmond, South Australia 5064, Australia
- School of Agriculture, Food and Wine, University of Adelaide, Glen Osmond, South Australia 5064, Australia
| |
Collapse
|
10
|
Tong T, Li Q, Jiang W, Chen G, Xue D, Deng F, Zeng F, Chen ZH. Molecular Evolution of Calcium Signaling and Transport in Plant Adaptation to Abiotic Stress. Int J Mol Sci 2021; 22:12308. [PMID: 34830190 PMCID: PMC8618852 DOI: 10.3390/ijms222212308] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2021] [Revised: 11/06/2021] [Accepted: 11/12/2021] [Indexed: 01/16/2023] Open
Abstract
Adaptation to unfavorable abiotic stresses is one of the key processes in the evolution of plants. Calcium (Ca2+) signaling is characterized by the spatiotemporal pattern of Ca2+ distribution and the activities of multi-domain proteins in integrating environmental stimuli and cellular responses, which are crucial early events in abiotic stress responses in plants. However, a comprehensive summary and explanation for evolutionary and functional synergies in Ca2+ signaling remains elusive in green plants. We review mechanisms of Ca2+ membrane transporters and intracellular Ca2+ sensors with evolutionary imprinting and structural clues. These may provide molecular and bioinformatics insights for the functional analysis of some non-model species in the evolutionarily important green plant lineages. We summarize the chronological order, spatial location, and characteristics of Ca2+ functional proteins. Furthermore, we highlight the integral functions of calcium-signaling components in various nodes of the Ca2+ signaling pathway through conserved or variant evolutionary processes. These ultimately bridge the Ca2+ cascade reactions into regulatory networks, particularly in the hormonal signaling pathways. In summary, this review provides new perspectives towards a better understanding of the evolution, interaction and integration of Ca2+ signaling components in green plants, which is likely to benefit future research in agriculture, evolutionary biology, ecology and the environment.
Collapse
Affiliation(s)
- Tao Tong
- Hubei Collaborative Innovation Center for Grain Industry, College of Agriculture, Yangtze University, Jingzhou 434022, China; (T.T.); (W.J.); (F.D.)
| | - Qi Li
- Central Laboratory, Zhejiang Academy of Agricultural Science, Hangzhou 310030, China; (Q.L.); (G.C.)
| | - Wei Jiang
- Hubei Collaborative Innovation Center for Grain Industry, College of Agriculture, Yangtze University, Jingzhou 434022, China; (T.T.); (W.J.); (F.D.)
| | - Guang Chen
- Central Laboratory, Zhejiang Academy of Agricultural Science, Hangzhou 310030, China; (Q.L.); (G.C.)
| | - Dawei Xue
- College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 311121, China;
| | - Fenglin Deng
- Hubei Collaborative Innovation Center for Grain Industry, College of Agriculture, Yangtze University, Jingzhou 434022, China; (T.T.); (W.J.); (F.D.)
| | - Fanrong Zeng
- Hubei Collaborative Innovation Center for Grain Industry, College of Agriculture, Yangtze University, Jingzhou 434022, China; (T.T.); (W.J.); (F.D.)
| | - Zhong-Hua Chen
- School of Science, Western Sydney University, Penrith 2751, Australia
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith 2751, Australia
| |
Collapse
|
11
|
Siddique MH, Babar NI, Zameer R, Muzammil S, Nahid N, Ijaz U, Masroor A, Nadeem M, Rashid MAR, Hashem A, Azeem F, Fathi Abd_Allah E. Genome-Wide Identification, Genomic Organization, and Characterization of Potassium Transport-Related Genes in Cajanus cajan and Their Role in Abiotic Stress. PLANTS (BASEL, SWITZERLAND) 2021; 10:2238. [PMID: 34834601 PMCID: PMC8619154 DOI: 10.3390/plants10112238] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2021] [Revised: 10/01/2021] [Accepted: 10/05/2021] [Indexed: 05/10/2023]
Abstract
Potassium is the most important and abundant inorganic cation in plants and it can comprise up to 10% of a plant's dry weight. Plants possess complex systems of transporters and channels for the transport of K+ from soil to numerous parts of plants. Cajanus cajan is cultivated in different regions of the world as an economical source of carbohydrates, fiber, proteins, and fodder for animals. In the current study, 39 K+ transport genes were identified in C. cajan, including 25 K+ transporters (17 carrier-like K+ transporters (KUP/HAK/KTs), 2 high-affinity potassium transporters (HKTs), and 6 K+ efflux transporters (KEAs) and 14 K+ channels (9 shakers and 5 tandem-pore K+ channels (TPKs). Chromosomal mapping indicated that these genes were randomly distributed among 10 chromosomes. A comparative phylogenetic analysis including protein sequences from Glycine max, Arabidopsis thaliana, Oryza sativa, Medicago truncatula Cicer arietinum, and C. cajan suggested vital conservation of K+ transport genes. Gene structure analysis showed that the intron/exon organization of K+ transporter and channel genes is highly conserved in a family-specific manner. In the promoter region, many cis-regulatory elements were identified related to abiotic stress, suggesting their role in abiotic stress response. Abiotic stresses (salt, heat, and drought) adversely affect chlorophyll, carotenoids contents, and total soluble proteins. Furthermore, the activities of catalase, superoxide, and peroxidase were altered in C. cajan leaves under applied stresses. Expression analysis (RNA-seq data and quantitative real-time PCR) revealed that several K+ transport genes were expressed in abiotic stress-responsive manners. The present study provides an in-depth understanding of K+ transport system genes in C. cajan and serves as a basis for further characterization of these genes.
Collapse
Affiliation(s)
- Muhammad Hussnain Siddique
- Department of Bioinformatics and Biotechnology, Government College University Faisalabad, Faisalabad 38000, Pakistan; (M.H.S.); (N.I.B.); (R.Z.); (N.N.); (U.I.)
| | - Naeem Iqbal Babar
- Department of Bioinformatics and Biotechnology, Government College University Faisalabad, Faisalabad 38000, Pakistan; (M.H.S.); (N.I.B.); (R.Z.); (N.N.); (U.I.)
| | - Roshan Zameer
- Department of Bioinformatics and Biotechnology, Government College University Faisalabad, Faisalabad 38000, Pakistan; (M.H.S.); (N.I.B.); (R.Z.); (N.N.); (U.I.)
| | - Saima Muzammil
- Department of Microbiology, Government College University Faisalabad, Faisalabad 38000, Pakistan;
| | - Nazia Nahid
- Department of Bioinformatics and Biotechnology, Government College University Faisalabad, Faisalabad 38000, Pakistan; (M.H.S.); (N.I.B.); (R.Z.); (N.N.); (U.I.)
| | - Usman Ijaz
- Department of Bioinformatics and Biotechnology, Government College University Faisalabad, Faisalabad 38000, Pakistan; (M.H.S.); (N.I.B.); (R.Z.); (N.N.); (U.I.)
| | - Ashir Masroor
- Sub-Campus Burewala-Vehari, University of Agriculture Faisalabad, Faisalabad 38000, Pakistan;
| | - Majid Nadeem
- Wheat Research Institute, Ayub Agricultural Research Institute, Faisalabad 38000, Pakistan;
| | - Muhammad Abdul Rehman Rashid
- Department of Bioinformatics and Biotechnology, Government College University Faisalabad, Faisalabad 38000, Pakistan; (M.H.S.); (N.I.B.); (R.Z.); (N.N.); (U.I.)
| | - Abeer Hashem
- Botany and Microbiology Department, College of Science, King Saud University, P.O. Box. 2460, Riyadh 11451, Saudi Arabia;
| | - Farrukh Azeem
- Department of Bioinformatics and Biotechnology, Government College University Faisalabad, Faisalabad 38000, Pakistan; (M.H.S.); (N.I.B.); (R.Z.); (N.N.); (U.I.)
| | - Elsayed Fathi Abd_Allah
- Plant Production Department, College of Food and Agricultural Sciences, King Saud University, P.O. Box. 2460, Riyadh 11451, Saudi Arabia;
| |
Collapse
|
12
|
Shelp BJ, Aghdam MS, Flaherty EJ. γ-Aminobutyrate (GABA) Regulated Plant Defense: Mechanisms and Opportunities. PLANTS (BASEL, SWITZERLAND) 2021; 10:1939. [PMID: 34579473 PMCID: PMC8468876 DOI: 10.3390/plants10091939] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Revised: 09/13/2021] [Accepted: 09/14/2021] [Indexed: 02/07/2023]
Abstract
Global climate change and associated adverse abiotic and biotic stress conditions affect plant growth and development, and agricultural sustainability in general. Abiotic and biotic stresses reduce respiration and associated energy generation in mitochondria, resulting in the elevated production of reactive oxygen species (ROS), which are employed to transmit cellular signaling information in response to the changing conditions. Excessive ROS accumulation can contribute to cell damage and death. Production of the non-protein amino acid γ-aminobutyrate (GABA) is also stimulated, resulting in partial restoration of respiratory processes and energy production. Accumulated GABA can bind directly to the aluminum-activated malate transporter and the guard cell outward rectifying K+ channel, thereby improving drought and hypoxia tolerance, respectively. Genetic manipulation of GABA metabolism and receptors, respectively, reveal positive relationships between GABA levels and abiotic/biotic stress tolerance, and between malate efflux from the root and heavy metal tolerance. The application of exogenous GABA is associated with lower ROS levels, enhanced membrane stability, changes in the levels of non-enzymatic and enzymatic antioxidants, and crosstalk among phytohormones. Exogenous GABA may be an effective and sustainable tolerance strategy against multiple stresses under field conditions.
Collapse
Affiliation(s)
- Barry J. Shelp
- Department of Plant Agriculture, University of Guelph, Guelph, ON N1G 2W1, Canada;
| | - Morteza Soleimani Aghdam
- Department of Horticultural Science, Imam Khomeini International University, Qazvin 34148-96818, Iran;
| | - Edward J. Flaherty
- Department of Plant Agriculture, University of Guelph, Guelph, ON N1G 2W1, Canada;
| |
Collapse
|
13
|
Qi WY, Li Q, Chen H, Liu J, Xing SF, Xu M, Yan Z, Song C, Wang SG. Selenium nanoparticles ameliorate Brassica napus L. cadmium toxicity by inhibiting the respiratory burst and scavenging reactive oxygen species. JOURNAL OF HAZARDOUS MATERIALS 2021; 417:125900. [PMID: 33975164 DOI: 10.1016/j.jhazmat.2021.125900] [Citation(s) in RCA: 40] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2020] [Revised: 04/12/2021] [Accepted: 04/12/2021] [Indexed: 05/10/2023]
Abstract
Cadmium (Cd) is a widely distributed soil contaminant which induces oxidative damage and is therefore toxic to plants. Although selenium oxyanions such as selenite (SeO32-) and selenate (SeO42-) can alleviate Cd stress to plants, it is not known whether selenium nanoparticles (SeNPs) are able to do the same. The present study demonstrated the positive impact of both SeNPs and SeO32- on Brassica napus L. growth under conditions of Cd stress. Underlying mechanisms were elucidated using an oxidative stress detection assay, whole-genome RNA sequencing, and RT-qPCR. Application of selenium, especially in the form of SeNPs, decreased Cd-induced reactive oxygen species production by inhibiting the expression of NADPH oxidases (BnaRBOHC, BnaRBOHD1, and BnaRBOHF1) and glycolate oxidase (BnaGLO), thereby decreasing oxidative protein and membrane lipid damage. In addition, SeNPs improved resistance to Cd stress by decreasing Cd accumulation, maintaining intracellular calcium homeostasis, promoting disulfide bond formation, and restoring the waxy outer layer of the leaf surface. Although both forms of selenium decreased Cd toxicity, the beneficial concentration range was more extensive for SeNPs than for SeO32-.
Collapse
Affiliation(s)
- Wen-Yu Qi
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao 266237, China
| | - Qiang Li
- College of Agriculture and Forestry Science, Linyi University, Linyi 276002, China; State Key Laboratory of Microbial Technology, Shandong University, Qingdao 266237, China
| | - Hui Chen
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao 266237, China
| | - Jun Liu
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao 266237, China
| | - Su-Fang Xing
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao 266237, China
| | - Meng Xu
- College of Agriculture and Forestry Science, Linyi University, Linyi 276002, China
| | - Zhen Yan
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao 266237, China
| | - Chao Song
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao 266237, China
| | - Shu-Guang Wang
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao 266237, China.
| |
Collapse
|
14
|
Sasidharan R, Schippers JHM, Schmidt RR. Redox and low-oxygen stress: signal integration and interplay. PLANT PHYSIOLOGY 2021; 186:66-78. [PMID: 33793937 PMCID: PMC8154046 DOI: 10.1093/plphys/kiaa081] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Accepted: 11/26/2020] [Indexed: 05/21/2023]
Abstract
Plants are aerobic organisms relying on oxygen to serve their energy needs. The amount of oxygen available to sustain plant growth can vary significantly due to environmental constraints or developmental programs. In particular, flooding stress, which negatively impacts crop productivity, is characterized by a decline in oxygen availability. Oxygen fluctuations result in an altered redox balance and the formation of reactive oxygen/nitrogen species (ROS/RNS) during the onset of hypoxia and upon re-oxygenation. In this update, we provide an overview of the current understanding of the impact of redox and ROS/RNS on low-oxygen signaling and adaptation. We first focus on the formation of ROS and RNS during low-oxygen conditions. Following this, we examine the impact of hypoxia on cellular and organellar redox systems. Finally, we describe how redox and ROS/RNS participate in signaling events during hypoxia through potential post-translational modifications (PTMs) of hypoxia-relevant proteins. The aim of this update is to define our current understanding of the field and to provide avenues for future research directions.
Collapse
Affiliation(s)
- Rashmi Sasidharan
- Plant Ecophysiology, Institute of Environmental Biology, Utrecht University, Utrecht 3584 CH, The Netherlands
| | - Jos H M Schippers
- Department of Molecular Genetics, Leibniz Institute of Plant Genetics and Crop Plant Research (IPK) Gatersleben, Seeland 06466, Germany
| | - Romy R Schmidt
- Faculty of Biology, Plant Biotechnology Group, Bielefeld University, Bielefeld 33615, Germany
- Author for communication:
| |
Collapse
|
15
|
Wu Q, Su N, Huang X, Cui J, Shabala L, Zhou M, Yu M, Shabala S. Hypoxia-induced increase in GABA content is essential for restoration of membrane potential and preventing ROS-induced disturbance to ion homeostasis. PLANT COMMUNICATIONS 2021; 2:100188. [PMID: 34027398 PMCID: PMC8132176 DOI: 10.1016/j.xplc.2021.100188] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Revised: 04/07/2021] [Accepted: 04/28/2021] [Indexed: 05/03/2023]
Abstract
When plants are exposed to hypoxic conditions, the level of γ-aminobutyric acid (GABA) in plant tissues increases by several orders of magnitude. The physiological rationale behind this elevation remains largely unanswered. By combining genetic and electrophysiological approach, in this work we show that hypoxia-induced increase in GABA content is essential for restoration of membrane potential and preventing ROS-induced disturbance to cytosolic K+ homeostasis and Ca2+ signaling. We show that reduced O2 availability affects H+-ATPase pumping activity, leading to membrane depolarization and K+ loss via outward-rectifying GORK channels. Hypoxia stress also results in H2O2 accumulation in the cell that activates ROS-inducible Ca2+ uptake channels and triggers self-amplifying "ROS-Ca hub," further exacerbating K+ loss via non-selective cation channels that results in the loss of the cell's viability. Hypoxia-induced elevation in the GABA level may restore membrane potential by pH-dependent regulation of H+-ATPase and/or by generating more energy through the activation of the GABA shunt pathway and TCA cycle. Elevated GABA can also provide better control of the ROS-Ca2+ hub by transcriptional control of RBOH genes thus preventing over-excessive H2O2 accumulation. Finally, GABA can operate as a ligand directly controlling the open probability and conductance of K+ efflux GORK channels, thus enabling plants adaptation to hypoxic conditions.
Collapse
Affiliation(s)
- Qi Wu
- International Research Centre for Environmental Membrane Biology, Foshan University, Foshan 528000, China
- Tasmanian Institute for Agriculture, College of Science and Engineering, University of Tasmania, Hobart, TAS 7001, Australia
- Institute of Crop Germplasm and Biotechnology, Provincial Key Laboratory of Agrobiology, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
| | - Nana Su
- Tasmanian Institute for Agriculture, College of Science and Engineering, University of Tasmania, Hobart, TAS 7001, Australia
- College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Xin Huang
- International Research Centre for Environmental Membrane Biology, Foshan University, Foshan 528000, China
- Tasmanian Institute for Agriculture, College of Science and Engineering, University of Tasmania, Hobart, TAS 7001, Australia
| | - Jin Cui
- College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Lana Shabala
- Tasmanian Institute for Agriculture, College of Science and Engineering, University of Tasmania, Hobart, TAS 7001, Australia
| | - Meixue Zhou
- Tasmanian Institute for Agriculture, College of Science and Engineering, University of Tasmania, Hobart, TAS 7001, Australia
| | - Min Yu
- International Research Centre for Environmental Membrane Biology, Foshan University, Foshan 528000, China
- Corresponding author
| | - Sergey Shabala
- International Research Centre for Environmental Membrane Biology, Foshan University, Foshan 528000, China
- Tasmanian Institute for Agriculture, College of Science and Engineering, University of Tasmania, Hobart, TAS 7001, Australia
- Corresponding author
| |
Collapse
|
16
|
Sachdev S, Ansari SA, Ansari MI, Fujita M, Hasanuzzaman M. Abiotic Stress and Reactive Oxygen Species: Generation, Signaling, and Defense Mechanisms. Antioxidants (Basel) 2021; 10:277. [PMID: 33670123 PMCID: PMC7916865 DOI: 10.3390/antiox10020277] [Citation(s) in RCA: 270] [Impact Index Per Article: 90.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Revised: 01/29/2021] [Accepted: 02/01/2021] [Indexed: 12/19/2022] Open
Abstract
Climate change is an invisible, silent killer with calamitous effects on living organisms. As the sessile organism, plants experience a diverse array of abiotic stresses during ontogenesis. The relentless climatic changes amplify the intensity and duration of stresses, making plants dwindle to survive. Plants convert 1-2% of consumed oxygen into reactive oxygen species (ROS), in particular, singlet oxygen (1O2), superoxide radical (O2•-), hydrogen peroxide (H2O2), hydroxyl radical (•OH), etc. as a byproduct of aerobic metabolism in different cell organelles such as chloroplast, mitochondria, etc. The regulatory network comprising enzymatic and non-enzymatic antioxidant systems tends to keep the magnitude of ROS within plant cells to a non-damaging level. However, under stress conditions, the production rate of ROS increases exponentially, exceeding the potential of antioxidant scavengers instigating oxidative burst, which affects biomolecules and disturbs cellular redox homeostasis. ROS are similar to a double-edged sword; and, when present below the threshold level, mediate redox signaling pathways that actuate plant growth, development, and acclimatization against stresses. The production of ROS in plant cells displays both detrimental and beneficial effects. However, exact pathways of ROS mediated stress alleviation are yet to be fully elucidated. Therefore, the review deposits information about the status of known sites of production, signaling mechanisms/pathways, effects, and management of ROS within plant cells under stress. In addition, the role played by advancement in modern techniques such as molecular priming, systems biology, phenomics, and crop modeling in preventing oxidative stress, as well as diverting ROS into signaling pathways has been canvassed.
Collapse
Affiliation(s)
- Swati Sachdev
- Department of Environmental Science, School for Environmental Sciences, Babasaheb Bhimrao Ambedkar University, Vidya Vihar, Rae Bareli Road, Lucknow 226 025, India;
| | | | | | - Masayuki Fujita
- Laboratory of Plant Stress Responses, Department of Applied Biological Science, Faculty of Agriculture, Kagawa University, 2393 Ikenobe, Miki-cho, Kita-gun, Kagawa 761-0795, Japan
| | - Mirza Hasanuzzaman
- Department of Agronomy, Faculty of Agriculture, Sher-e-Bangla Agricultural University, Dhaka 1207, Bangladesh
| |
Collapse
|
17
|
Yemelyanov VV, Chirkova TV, Shishova MF, Lindberg SM. Potassium Efflux and Cytosol Acidification as Primary Anoxia-Induced Events in Wheat and Rice Seedlings. PLANTS 2020; 9:plants9091216. [PMID: 32948036 PMCID: PMC7570052 DOI: 10.3390/plants9091216] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Revised: 09/11/2020] [Accepted: 09/15/2020] [Indexed: 01/02/2023]
Abstract
Both ion fluxes and changes of cytosolic pH take an active part in the signal transduction of different environmental stimuli. Here we studied the anoxia-induced alteration of cytosolic K+ concentration, [K+]cyt, and cytosolic pH, pHcyt, in rice and wheat, plants with different tolerances to hypoxia. The [K+]cyt and pHcyt were measured by fluorescence microscopy in single leaf mesophyll protoplasts loaded with the fluorescent potassium-binding dye PBFI-AM and the pH-sensitive probe BCECF-AM, respectively. Anoxic treatment caused an efflux of K+ from protoplasts of both plants after a lag-period of 300-450 s. The [K+]cyt decrease was blocked by tetraethylammonium (1 mM, 30 min pre-treatment) suggesting the involvement of plasma membrane voltage-gated K+ channels. The protoplasts of rice (a hypoxia-tolerant plant) reacted upon anoxia with a higher amplitude of the [K+]cyt drop. There was a simultaneous anoxia-dependent cytosolic acidification of protoplasts of both plants. The decrease of pHcyt was slower in wheat (a hypoxia-sensitive plant) while in rice protoplasts it was rapid and partially reversible. Ion fluxes between the roots of intact seedlings and nutrient solutions were monitored by ion-selective electrodes and revealed significant anoxia-induced acidification and potassium leakage that were inhibited by tetraethylammonium. The K+ efflux from rice was more distinct and reversible upon reoxygenation when compared with wheat seedlings.
Collapse
Affiliation(s)
- Vladislav V. Yemelyanov
- Department of Genetics and Biotechnology, Saint-Petersburg State University, Universitetskaya em., 7/9, 199034 Saint-Petersburg, Russia
- Department of Plant Physiology and Biochemistry, Saint-Petersburg State University, Universitetskaya em., 7/9, 199034 Saint-Petersburg, Russia; (T.V.C.); (M.F.S.)
- Correspondence:
| | - Tamara V. Chirkova
- Department of Plant Physiology and Biochemistry, Saint-Petersburg State University, Universitetskaya em., 7/9, 199034 Saint-Petersburg, Russia; (T.V.C.); (M.F.S.)
| | - Maria F. Shishova
- Department of Plant Physiology and Biochemistry, Saint-Petersburg State University, Universitetskaya em., 7/9, 199034 Saint-Petersburg, Russia; (T.V.C.); (M.F.S.)
| | - Sylvia M. Lindberg
- Department of Ecology, Environment and Plant Sciences, Stockholm University, SE-106 91 Stockholm, Sweden;
| |
Collapse
|
18
|
Feng X, Liu W, Qiu C, Zeng F, Wang Y, Zhang G, Chen Z, Wu F. HvAKT2 and HvHAK1 confer drought tolerance in barley through enhanced leaf mesophyll H + homoeostasis. PLANT BIOTECHNOLOGY JOURNAL 2020; 18:1683-1696. [PMID: 31917885 PMCID: PMC7336388 DOI: 10.1111/pbi.13332] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2019] [Revised: 12/27/2019] [Accepted: 01/05/2020] [Indexed: 05/18/2023]
Abstract
Plant K+ uptake typically consists low-affinity mechanisms mediated by Shaker K+ channels (AKT/KAT/KC) and high-affinity mechanisms regulated by HAK/KUP/KT transporters, which are extensively studied. However, the evolutionary and genetic roles of both K+ uptake mechanisms for drought tolerance are not fully explored in crops adapted to dryland agriculture. Here, we employed evolutionary bioinformatics, biotechnological and electrophysiological approaches to determine the role of two important K+ transporters HvAKT2 and HvHAK1 in drought tolerance in barley. HvAKT2 and HvHAK1 were cloned and functionally characterized using barley stripe mosaic virus-induced gene silencing (BSMV-VIGS) in drought-tolerant wild barley XZ5 and agrobacterium-mediated gene transfer in the barley cultivar Golden Promise. The hallmarks of the K+ selective filters of AKT2 and HAK1 are both found in homologues from strepotophyte algae, and they are evolutionarily conserved in strepotophyte algae and land plants. HvAKT2 and HvHAK1 are both localized to the plasma membrane and have high selectivity to K+ and Rb+ over other tested cations. Overexpression of HvAKT2 and HvHAK1 enhanced K+ uptake and H+ homoeostasis leading to drought tolerance in these transgenic lines. Moreover, HvAKT2- and HvHAK1-overexpressing lines showed distinct response of K+ , H+ and Ca2+ fluxes across plasma membrane and production of nitric oxide and hydrogen peroxide in leaves as compared to the wild type and silenced lines. High- and low-affinity K+ uptake mechanisms and their coordination with H+ homoeostasis play essential roles in drought adaptation of wild barley. These findings can potentially facilitate future breeding programs for resilient cereal crops in a changing global climate.
Collapse
Affiliation(s)
- Xue Feng
- Department of AgronomyCollege of Agriculture and BiotechnologyZhejiang UniversityHangzhouChina
- Jiangsu Co‐Innovation Center for Modern Production Technology of Grain CropsYangzhou UniversityYangzhouChina
| | - Wenxing Liu
- Department of AgronomyCollege of Agriculture and BiotechnologyZhejiang UniversityHangzhouChina
| | - Cheng‐Wei Qiu
- Department of AgronomyCollege of Agriculture and BiotechnologyZhejiang UniversityHangzhouChina
- Jiangsu Co‐Innovation Center for Modern Production Technology of Grain CropsYangzhou UniversityYangzhouChina
| | - Fanrong Zeng
- Department of AgronomyCollege of Agriculture and BiotechnologyZhejiang UniversityHangzhouChina
| | - Yizhou Wang
- Department of AgronomyCollege of Agriculture and BiotechnologyZhejiang UniversityHangzhouChina
| | - Guoping Zhang
- Department of AgronomyCollege of Agriculture and BiotechnologyZhejiang UniversityHangzhouChina
| | - Zhong‐Hua Chen
- School of ScienceHawkesbury Institute for the EnvironmentWestern Sydney UniversityPenrithNSWAustralia
- Collaborative Innovation Center for Grain IndustryCollege of AgricultureYangtze UniversityJingzhouChina
| | - Feibo Wu
- Department of AgronomyCollege of Agriculture and BiotechnologyZhejiang UniversityHangzhouChina
- Jiangsu Co‐Innovation Center for Modern Production Technology of Grain CropsYangzhou UniversityYangzhouChina
| |
Collapse
|
19
|
Schall P, Marutschke L, Grimm B. The Flavoproteome of the Model Plant Arabidopsis thaliana. Int J Mol Sci 2020; 21:ijms21155371. [PMID: 32731628 PMCID: PMC7432721 DOI: 10.3390/ijms21155371] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Revised: 07/22/2020] [Accepted: 07/25/2020] [Indexed: 12/17/2022] Open
Abstract
Flavin mononucleotide (FMN) and flavin adenine dinucleotide (FAD) are essential cofactors for enzymes, which catalyze a broad spectrum of vital reactions. This paper intends to compile all potential FAD/FMN-binding proteins encoded by the genome of Arabidopsis thaliana. Several computational approaches were applied to group the entire flavoproteome according to (i) different catalytic reactions in enzyme classes, (ii) the localization in subcellular compartments, (iii) different protein families and subclasses, and (iv) their classification to structural properties. Subsequently, the physiological significance of several of the larger flavoprotein families was highlighted. It is conclusive that plants, such as Arabidopsis thaliana, use many flavoenzymes for plant-specific and pivotal metabolic activities during development and for signal transduction pathways in response to biotic and abiotic stress. Thereby, often two up to several homologous genes are found encoding proteins with high protein similarity. It is proposed that these gene families for flavoproteins reflect presumably their need for differential transcriptional control or the expression of similar proteins with modified flavin-binding properties or catalytic activities.
Collapse
|
20
|
Wu Q, Huang L, Su N, Shabala L, Wang H, Huang X, Wen R, Yu M, Cui J, Shabala S. Calcium-Dependent Hydrogen Peroxide Mediates Hydrogen-Rich Water-Reduced Cadmium Uptake in Plant Roots. PLANT PHYSIOLOGY 2020; 183:1331-1344. [PMID: 32366640 PMCID: PMC7333692 DOI: 10.1104/pp.20.00377] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Accepted: 04/24/2020] [Indexed: 05/03/2023]
Abstract
Hydrogen gas (H2) has a possible signaling role in many developmental and adaptive plant responses, including mitigating the harmful effects of cadmium (Cd) uptake from soil. We used electrophysiological and molecular approaches to understand how H2 ameliorates Cd toxicity in pak choi (Brassica campestris ssp. chinensis). Exposure of pak choi roots to Cd resulted in a rapid increase in the intracellular H2 production. Exogenous application of hydrogen-rich water (HRW) resulted in a Cd-tolerant phenotype, with reduced net Cd uptake and accumulation. We showed that this is dependent upon the transport of calcium ions (Ca2+) across the plasma membrane and apoplastic generation of hydrogen peroxide (H2O2) by respiratory burst oxidase homolog (BcRbohD). The reduction in root Cd uptake was associated with the application of exogenous HRW or H2O2 This reduction was abolished in the iron-regulated transporter1 (Atirt1) mutant of Arabidopsis (Arabidopsis thaliana), and pak choi pretreated with HRW showed decreased BcIRT1 transcript levels. Roots exposed to HRW had rapid Ca2+ influx, and Cd-induced Ca2+ leakage was alleviated. Two Ca2+ channel blockers, gadolinium ion (Gd3+) and lanthanum ion (La3+), eliminated the HRW-induced increase in BcRbohD expression, H2O2 production, and Cd2+ influx inhibition. Collectively, our results suggest that the Cd-protective effect of H2 in plants may be explained by its control of the plasma membrane-based NADPH oxidase encoded by RbohD, which operates upstream of IRT1 and regulates root Cd uptake at both the transcriptional and functional levels. These findings provide a mechanistic explanation for the alleviatory role of H2 in Cd accumulation and toxicity in plants.
Collapse
Affiliation(s)
- Qi Wu
- Department of Horticulture and International Research Centre for Environmental Membrane Biology, Foshan University, Foshan 528000, China
- College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China
- Tasmanian Institute of Agriculture, College of Science and Engineering, University of Tasmania, Hobart, Tasmania 7001, Australia
| | - Liping Huang
- Department of Horticulture and International Research Centre for Environmental Membrane Biology, Foshan University, Foshan 528000, China
| | - Nana Su
- College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Lana Shabala
- Tasmanian Institute of Agriculture, College of Science and Engineering, University of Tasmania, Hobart, Tasmania 7001, Australia
| | - Haiyang Wang
- Tasmanian Institute of Agriculture, College of Science and Engineering, University of Tasmania, Hobart, Tasmania 7001, Australia
| | - Xin Huang
- Department of Horticulture and International Research Centre for Environmental Membrane Biology, Foshan University, Foshan 528000, China
| | - Ruiyu Wen
- Department of Horticulture and International Research Centre for Environmental Membrane Biology, Foshan University, Foshan 528000, China
| | - Min Yu
- Department of Horticulture and International Research Centre for Environmental Membrane Biology, Foshan University, Foshan 528000, China
| | - Jin Cui
- College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Sergey Shabala
- Department of Horticulture and International Research Centre for Environmental Membrane Biology, Foshan University, Foshan 528000, China
- Tasmanian Institute of Agriculture, College of Science and Engineering, University of Tasmania, Hobart, Tasmania 7001, Australia
| |
Collapse
|
21
|
Tagliani A, Tran AN, Novi G, Di Mambro R, Pesenti M, Sacchi GA, Perata P, Pucciariello C. The calcineurin β-like interacting protein kinase CIPK25 regulates potassium homeostasis under low oxygen in Arabidopsis. JOURNAL OF EXPERIMENTAL BOTANY 2020; 71:2678-2689. [PMID: 32053194 PMCID: PMC7210770 DOI: 10.1093/jxb/eraa004] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2019] [Accepted: 02/12/2020] [Indexed: 05/24/2023]
Abstract
Hypoxic conditions often arise from waterlogging and flooding, affecting several aspects of plant metabolism, including the uptake of nutrients. We identified a member of the CALCINEURIN β-LIKE INTERACTING PROTEIN KINASE (CIPK) family in Arabidopsis, CIPK25, which is induced in the root endodermis under low-oxygen conditions. A cipk25 mutant exhibited higher sensitivity to anoxia in conditions of potassium limitation, suggesting that this kinase is involved in the regulation of potassium uptake. Interestingly, we found that CIPK25 interacts with AKT1, the major inward rectifying potassium channel in Arabidopsis. Under anoxic conditions, cipk25 mutant seedlings were unable to maintain potassium concentrations at wild-type levels, suggesting that CIPK25 likely plays a role in modulating potassium homeostasis under low-oxygen conditions. In addition, cipk25 and akt1 mutants share similar developmental defects under waterlogging, further supporting an interplay between CIPK25 and AKT1.
Collapse
Affiliation(s)
- Andrea Tagliani
- PlantLab, Institute of Life Sciences, Scuola Superiore Sant’Anna, Pisa, Italy
- nanoPlant Center @NEST, Institute of Life Sciences, Scuola Superiore Sant’Anna, Pisa, Italy
| | - Anh Nguyet Tran
- PlantLab, Institute of Life Sciences, Scuola Superiore Sant’Anna, Pisa, Italy
| | - Giacomo Novi
- PlantLab, Institute of Life Sciences, Scuola Superiore Sant’Anna, Pisa, Italy
| | - Riccardo Di Mambro
- PlantLab, Institute of Life Sciences, Scuola Superiore Sant’Anna, Pisa, Italy
- Department of Biology, University of Pisa, Pisa, Italy
| | - Michele Pesenti
- Department of Agricultural and Environmental Science, University of Milano, Milano, Italy
| | - Gian Attilio Sacchi
- Department of Agricultural and Environmental Science, University of Milano, Milano, Italy
| | - Pierdomenico Perata
- PlantLab, Institute of Life Sciences, Scuola Superiore Sant’Anna, Pisa, Italy
- nanoPlant Center @NEST, Institute of Life Sciences, Scuola Superiore Sant’Anna, Pisa, Italy
| | - Chiara Pucciariello
- PlantLab, Institute of Life Sciences, Scuola Superiore Sant’Anna, Pisa, Italy
- nanoPlant Center @NEST, Institute of Life Sciences, Scuola Superiore Sant’Anna, Pisa, Italy
| |
Collapse
|
22
|
Choudhary A, Kumar A, Kaur N. ROS and oxidative burst: Roots in plant development. PLANT DIVERSITY 2020; 42:33-43. [PMID: 32140635 PMCID: PMC7046507 DOI: 10.1016/j.pld.2019.10.002] [Citation(s) in RCA: 87] [Impact Index Per Article: 21.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2019] [Revised: 09/02/2019] [Accepted: 10/10/2019] [Indexed: 05/03/2023]
Abstract
Reactive oxygen species (ROS) are widely generated in various redox reactions in plants. In earlier studies, ROS were considered toxic byproducts of aerobic metabolism. In recent years, it has become clear that ROS act as plant signaling molecules that participate in various processes such as growth and development. Several studies have elucidated the roles of ROS from seed germination to senescence. However, there is much to discover about the diverse roles of ROS as signaling molecules and their mechanisms of sensing and response. ROS may provide possible benefits to plant physiological processes by supporting cellular proliferation in cells that maintain basal levels prior to oxidative effects. Although ROS are largely perceived as either negative by-products of aerobic metabolism or makers for plant stress, elucidating the range of functions that ROS play in growth and development still require attention.
Collapse
|
23
|
Demidchik V. ROS-Activated Ion Channels in Plants: Biophysical Characteristics, Physiological Functions and Molecular Nature. Int J Mol Sci 2018; 19:E1263. [PMID: 29690632 PMCID: PMC5979493 DOI: 10.3390/ijms19041263] [Citation(s) in RCA: 70] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2017] [Revised: 04/02/2018] [Accepted: 04/03/2018] [Indexed: 12/16/2022] Open
Abstract
Ion channels activated by reactive oxygen species (ROS) have been found in the plasma membrane of charophyte Nitella flixilis, dicotyledon Arabidopsis thaliana, Pyrus pyrifolia and Pisum sativum, and the monocotyledon Lilium longiflorum. Their activities have been reported in charophyte giant internodes, root trichoblasts and atrichoblasts, pollen tubes, and guard cells. Hydrogen peroxide and hydroxyl radicals are major activating species for these channels. Plant ROS-activated ion channels include inwardly-rectifying, outwardly-rectifying, and voltage-independent groups. The inwardly-rectifying ROS-activated ion channels mediate Ca2+-influx for growth and development in roots and pollen tubes. The outwardly-rectifying group facilitates K⁺ efflux for the regulation of osmotic pressure in guard cells, induction of programmed cell death, and autophagy in roots. The voltage-independent group mediates both Ca2+ influx and K⁺ efflux. Most studies suggest that ROS-activated channels are non-selective cation channels. Single-channel studies revealed activation of 14.5-pS Ca2+ influx and 16-pS K⁺ efflux unitary conductances in response to ROS. The molecular nature of ROS-activated Ca2+ influx channels remains poorly understood, although annexins and cyclic nucleotide-gated channels have been proposed for this role. The ROS-activated K⁺ channels have recently been identified as products of Stellar K⁺ Outward Rectifier (SKOR) and Guard cell Outwardly Rectifying K⁺ channel (GORK) genes.
Collapse
Affiliation(s)
- Vadim Demidchik
- Department of Horticulture, School of Food Science and Engineering, Foshan University, Foshan 528000, China.
- Department of Plant Cell Biology and Bioengineering, Biological Faculty, Belarusian State University, 4 Independence Avenue, 220030 Minsk, Belarus.
- Russian Academy of Sciences, Komarov Botanical Institute, 2 Professora Popova Street, 197376 St. Petersburg, Russia.
| |
Collapse
|
24
|
Elevation of cytosolic Ca2+ in response to energy deficiency in plants: the general mechanism of adaptation to low oxygen stress. Biochem J 2018; 475:1411-1425. [DOI: 10.1042/bcj20180169] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2018] [Revised: 03/27/2018] [Accepted: 03/29/2018] [Indexed: 02/06/2023]
Abstract
Ca2+ can be released from cell compartments to the cytosol during stress conditions. We discuss here the causes of Ca2+ release under conditions of ATP concentration decline that result in the suppression of ATPases and activation of calcium ion channels. The main signaling and metabolic consequences of Ca2+ release are considered for stressed plant cells. The signaling function includes generation and spreading of calcium waves, while the metabolic function results in the activation of particular enzymes and genes. Ca2+ is involved in the activation of glutamate decarboxylase, initiating the γ-aminobutyric acid shunt and triggering the formation of alanine, processes which play a role, in particular, in pH regulation. Ca2+ activates the transcription of several genes, e.g. of plant hemoglobin (phytoglobin, Pgb) which scavenges nitric oxide and regulates redox and energy balance through the Pgb–nitric oxide cycle. This cycle involves NADH and NADPH oxidation from the cytosolic side of mitochondria, in which Ca2+- and low pH-activated external NADH and NADPH dehydrogenases participate. Ca2+ can also activate the genes of alcohol dehydrogenase and pyruvate decarboxylase stimulating hypoxic fermentation. It is concluded that calcium is a primary factor that causes the metabolic shift under conditions of oxygen deficiency.
Collapse
|
25
|
Gill MB, Zeng F, Shabala L, Böhm J, Zhang G, Zhou M, Shabala S. The ability to regulate voltage-gated K+-permeable channels in the mature root epidermis is essential for waterlogging tolerance in barley. JOURNAL OF EXPERIMENTAL BOTANY 2018; 69:667-680. [PMID: 29301054 PMCID: PMC5853535 DOI: 10.1093/jxb/erx429] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2017] [Accepted: 11/17/2017] [Indexed: 05/19/2023]
Abstract
Oxygen depletion under waterlogged conditions results in a compromised operation of H+-ATPase, with strong implications for membrane potential maintenance, cytosolic pH homeostasis, and transport of all nutrients across membranes. The above effects, however, are highly tissue specific and time dependent, and the causal link between hypoxia-induced changes to the cell's ionome and plant adaptive responses to hypoxia is not well established. This work aimed to fill this gap and investigate the effects of oxygen deprivation on K+ signalling and homeostasis in plants, and potential roles of GORK (depolarization-activated outward-rectifying potassium) channels in adaptation to oxygen-deprived conditions in barley. A significant K+ loss was observed in roots exposed to hypoxic conditions; this loss correlated with the cell's viability. Stress-induced K+ loss was stronger in the root apex immediately after stress onset, but became more pronounced in the root base as the stress progressed. The amount of K+ in shoots of plants grown in waterlogged soil correlated strongly with K+ flux under hypoxia measured in laboratory experiments. Hypoxia induced membrane depolarization; the severity of this depolarization was less pronounced in the tolerant group of cultivars. The expression of GORK was down-regulated by 1.5-fold in mature root but it was up-regulated by 10-fold in the apex after 48 h hypoxia stress. Taken together, our results suggest that the GORK channel plays a central role in K+ retention and signalling under hypoxia stress, and measuring hypoxia-induced K+ fluxes from the mature root zone may be used as a physiological marker to select waterlogging-tolerant varieties in breeding programmes.
Collapse
Affiliation(s)
- Muhammad Bilal Gill
- Department of Agronomy, Zhejiang University, Hangzhou, China
- School of Land and Food, University of Tasmania, Hobart, Tasmania, Australia
| | - Fanrong Zeng
- Department of Agronomy, Zhejiang University, Hangzhou, China
| | - Lana Shabala
- School of Land and Food, University of Tasmania, Hobart, Tasmania, Australia
| | - Jennifer Böhm
- School of Land and Food, University of Tasmania, Hobart, Tasmania, Australia
| | - Guoping Zhang
- Department of Agronomy, Zhejiang University, Hangzhou, China
| | - Meixue Zhou
- School of Land and Food, University of Tasmania, Hobart, Tasmania, Australia
| | - Sergey Shabala
- School of Land and Food, University of Tasmania, Hobart, Tasmania, Australia
| |
Collapse
|
26
|
Shabala S. Signalling by potassium: another second messenger to add to the list? JOURNAL OF EXPERIMENTAL BOTANY 2017; 68:4003-4007. [PMID: 28922770 PMCID: PMC5853517 DOI: 10.1093/jxb/erx238] [Citation(s) in RCA: 104] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Affiliation(s)
- Sergey Shabala
- Department of Horticulture, Foshan University, Foshan, China
- School of Land and Food, University of Tasmania, Private Bag, Hobart, Tas, Australia
| |
Collapse
|
27
|
Murphy A. Plant membranes and border control. JOURNAL OF EXPERIMENTAL BOTANY 2017; 68:3037-3040. [PMID: 28899083 PMCID: PMC5853494 DOI: 10.1093/jxb/erx229] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
|