151
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Lapeikaite I, Pupkis V, Neniskis V, Ruksenas O, Kisnieriene V. Glutamate and NMDA affect cell excitability and action potential dynamics of single cell of macrophyte Nitellopsis obtusa. FUNCTIONAL PLANT BIOLOGY : FPB 2020; 47:1032-1040. [PMID: 33213696 DOI: 10.1071/fp20074] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2020] [Accepted: 05/11/2020] [Indexed: 06/11/2023]
Abstract
The effect of glutamate and N-methyl-d-aspartate (NMDA) on electrical signalling - action potentials (AP) and excitation current transients - was studied in intact macrophyte Nitellopsis obtusa (Characeaen) internodal cell. Intracellular glass electrode recordings of single cell in current clamp and two-electrode voltage clamp modes indicate that glutamate (Glu, 0.1-1.0 mM) and NMDA (0.01-1.0 mM) increase electrically induced AP amplitude by hyperpolarising excitation threshold potential (Eth) and prolong AP fast repolarisation phase. Amplitude of Cl- current transient, as well as its activation and inactivation durations were also increased. Both Glu and NMDA act in a dose-dependent manner. The effect of NMDA exceeds that of Glu. Ionotropic glutamate receptor inhibitors AP-5 (NMDA-type receptors) and DNQX (AMPA/Kainate-type) have no effect on Nitellopsis cell electrical signalling per se, yet robustly inhibit excitatory effect of NMDA. This study reinforces NMDA as an active component in glutamatergic signalling at least in some plants and stresses the elaborate fine-tuning of electrical signalling.
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Affiliation(s)
- Indre Lapeikaite
- Institute of Biosciences, Life Sciences Centre, Vilnius University, Sauletekio Avenue. 7, LT-10257 Vilnius, Lithuania; and Corresponding author.
| | - Vilmantas Pupkis
- Institute of Biosciences, Life Sciences Centre, Vilnius University, Sauletekio Avenue. 7, LT-10257 Vilnius, Lithuania
| | - Vladas Neniskis
- Institute of Biosciences, Life Sciences Centre, Vilnius University, Sauletekio Avenue. 7, LT-10257 Vilnius, Lithuania
| | - Osvaldas Ruksenas
- Institute of Biosciences, Life Sciences Centre, Vilnius University, Sauletekio Avenue. 7, LT-10257 Vilnius, Lithuania
| | - Vilma Kisnieriene
- Institute of Biosciences, Life Sciences Centre, Vilnius University, Sauletekio Avenue. 7, LT-10257 Vilnius, Lithuania
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152
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Liu J, Shabala S, Zhang J, Ma G, Chen D, Shabala L, Zeng F, Chen ZH, Zhou M, Venkataraman G, Zhao Q. Melatonin improves rice salinity stress tolerance by NADPH oxidase-dependent control of the plasma membrane K + transporters and K + homeostasis. PLANT, CELL & ENVIRONMENT 2020; 43:2591-2605. [PMID: 32196121 DOI: 10.1111/pce.13759] [Citation(s) in RCA: 58] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2019] [Revised: 02/29/2020] [Accepted: 03/02/2020] [Indexed: 05/18/2023]
Abstract
This study aimed to reveal the mechanistic basis of the melatonin-mediated amelioration of salinity stress in plants. Electrophysiological experiments revealed that melatonin decreased salt-induced K+ efflux (a critical determinant of plant salt tolerance) in a dose- and time-dependent manner and reduced sensitivity of the plasma membrane K+ -permeable channels to hydroxyl radicals. These beneficial effects of melatonin were abolished by NADPH oxidase blocker DPI. Transcriptome analyses revealed that melatonin induced 585 (448 up- and 137 down-regulated) and 59 (54 up- and 5 down-regulated) differentially expressed genes (DEGs) in the root tip and mature zone, respectively. The most noticeable changes in the root tip were melatonin-induced increase in the expression of several DEGs encoding respiratory burst NADPH oxidases (OsRBOHA and OsRBOHF), calcineurin B-like/calcineurin B-like-interacting protein kinase (OsCBL/OsCIPK), and calcium-dependent protein kinase (OsCDPK) under salt stress. Melatonin also enhanced the expression of potassium transporter genes (OsAKT1, OsHAK1, and OsHAK5). Taken together, these results indicate that melatonin improves salt tolerance in rice by enabling K+ retention in roots, and that the latter process is conferred by melatonin scavenging of hydroxyl radicals and a concurrent OsRBOHF-dependent ROS signalling required to activate stress-responsive genes and increase the expression of K+ uptake transporters in the root tip.
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Affiliation(s)
- Juan Liu
- Collaborative Innovation Centre of Henan Grain Crops, Henan Key Laboratory of Rice Biology, Henan Agricultural University, Zhengzhou, China
- Tasmanian Institute of Agriculture, University of Tasmania, Hobart, Tasmania, Australia
| | - Sergey Shabala
- Tasmanian Institute of Agriculture, University of Tasmania, Hobart, Tasmania, Australia
- International Research Centre for Environmental Membrane Biology, Foshan University, Foshan, China
| | - Jing Zhang
- Collaborative Innovation Centre of Henan Grain Crops, Henan Key Laboratory of Rice Biology, Henan Agricultural University, Zhengzhou, China
| | - Guohui Ma
- State Key Laboratory of Hybrid Rice, Hunan Hybrid Rice Research Center, Changsha, China
| | - Dandan Chen
- Collaborative Innovation Centre of Henan Grain Crops, Henan Key Laboratory of Rice Biology, Henan Agricultural University, Zhengzhou, China
| | - Lana Shabala
- Tasmanian Institute of Agriculture, University of Tasmania, Hobart, Tasmania, Australia
| | - Fanrong Zeng
- Department of Agronomy, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China
| | - Zhong-Hua Chen
- School of Science, Hawkesbury Institute for the Environment, Western Sydney University, Penrith, New South Wales, Australia
- Collaborative Innovation Centre for Grain Industry, College of Agriculture, Yangtze University, Jingzhou, China
| | - Meixue Zhou
- Tasmanian Institute of Agriculture, University of Tasmania, Hobart, Tasmania, Australia
| | - Gayatri Venkataraman
- Plant Molecular Biology Laboratory, M.S. Swaminathan Research Foundation, III Cross Street, Taramani Institutional Area, Chennai, India
| | - Quanzhi Zhao
- Collaborative Innovation Centre of Henan Grain Crops, Henan Key Laboratory of Rice Biology, Henan Agricultural University, Zhengzhou, China
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153
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Calcium Plays a Double-Edged Role in Modulating Cadmium Uptake and Translocation in Rice. Int J Mol Sci 2020; 21:ijms21218058. [PMID: 33137932 PMCID: PMC7662230 DOI: 10.3390/ijms21218058] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2020] [Revised: 10/21/2020] [Accepted: 10/27/2020] [Indexed: 01/11/2023] Open
Abstract
Cadmium (Cd) contamination in soils poses great risks to both agricultural production and human health. Calcium (Ca) is an essential element playing a significant role in protecting plants against Cd toxicity. However, how Ca affects Cd uptake and translocation in rice is still not fully elucidated. In this study, the regulatory role of Ca in Cd uptake and upward translocation was investigated in rice at different growth stages. Our results showed that the supplement of 5 mM Ca significantly reduced Cd uptake by rice roots, because of their competition for Ca-permeable channels as an absorption site and Ca-induced downregulation of OsNRAMP1 and OsNRAMP5. However, Ca application facilitated the upward translocation of Cd by both upregulating OsHMA2 to induce xylem loading of Cd and downregulating OsHMA3 to reduce vacuolar sequestration of Cd. Such contrary results suggested a double-edged role of Ca in regulating root Cd uptake and root-to-shoot Cd translocation in rice. Although it increased Cd content in the aboveground vegetative tissues during the whole growth period, the addition of 5 mM Ca eventually decreased Cd content in rice grains at the ripening stage. All these results suggest that Ca-based amendments possess great potential for the production of low-Cd rice grains.
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154
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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.
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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;
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155
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Zhao M, Chen J, Jin H, Qi Z. Extracellular Ca 2+ induces desensitized cytosolic Ca 2+ rise sensitive to phospholipase C inhibitor which suppresses root growth with Ca 2+ dependence. JOURNAL OF PLANT PHYSIOLOGY 2020; 252:153190. [PMID: 32688165 DOI: 10.1016/j.jplph.2020.153190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2020] [Revised: 05/04/2020] [Accepted: 05/09/2020] [Indexed: 06/11/2023]
Abstract
Calcium (Ca) is an essential element for all organisms. In animal cells, the plasma membrane-localized Ca receptor CaSR coupled to a phospholipase C (PLC)-dependent signaling cascade monitors extracellular Ca2+ concentrations ([Ca2+]ext) and responds with increases in cytosolic calcium concentrations ([Ca2+]cyt). Plant roots encounter variable soil conditions, but how they sense changes in [Ca2+]ext is largely unknown. In this study, we demonstrate that increasing [Ca2+]ext evokes a transient increase in [Ca2+] in the cytosol, mitochondria, and nuclei of Arabidopsis thaliana root cells. These increases were strongly desensitized to repeat applications of [Ca2+]ext, a typical feature of receptor-mediated cellular signaling in animal and plant cells. Treatment with gadolinium (Gd3+), a CaSR activator in animal cells, induced concentration-dependent increases in [Ca2+]cyt in roots, which showed self-desensitization and cross-desensitization to [Ca2+]ext-induced increases in [Ca2+]cyt (EICC). EICC was sensitive to extracellular H+, K+, Na+, and Mg2+ levels. Treatment with the PLC inhibitor neomycin suppressed EICC and Ca accumulation in roots. The inhibitory effect of neomycin on root elongation was fully rescued by increasing [Ca2+]ext but not [Mg2+] or [K+] in the growth medium. These results suggest that [Ca2+]ext and the movement of Ca2+ into the cytosol of plant roots are regulated by a receptor-mediated signaling pathway involving PLC.
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Affiliation(s)
- Man Zhao
- Key Laboratory of Forage and Endemic Crop Biotechnology, Ministry of Education, School of Life Sciences, Inner Mongolia University, Hohhot, 010071, PR China; State Key Laboratory of Reproductive Regulatory and Breeding of Grassland Livestock, Inner Mongolia University, Hohhot, 010071, PR China
| | - Jianhua Chen
- Key Laboratory of Forage and Endemic Crop Biotechnology, Ministry of Education, School of Life Sciences, Inner Mongolia University, Hohhot, 010071, PR China; State Key Laboratory of Reproductive Regulatory and Breeding of Grassland Livestock, Inner Mongolia University, Hohhot, 010071, PR China
| | - Huiqing Jin
- Research Centre for Horticultural Science and Technology of Hohhot, Hohhot, 010020, PR China
| | - Zhi Qi
- Key Laboratory of Forage and Endemic Crop Biotechnology, Ministry of Education, School of Life Sciences, Inner Mongolia University, Hohhot, 010071, PR China; State Key Laboratory of Reproductive Regulatory and Breeding of Grassland Livestock, Inner Mongolia University, Hohhot, 010071, PR China.
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156
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Yang J, Zhang T, Mao H, Jin H, Sun Y, Qi Z. A Leymus chinensis histidine-rich Ca 2+-binding protein binds Ca 2+/Zn 2+ and suppresses abscisic acid signaling in Arabidopsis. JOURNAL OF PLANT PHYSIOLOGY 2020; 252:153209. [PMID: 32791445 DOI: 10.1016/j.jplph.2020.153209] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2020] [Revised: 05/09/2020] [Accepted: 05/25/2020] [Indexed: 05/23/2023]
Abstract
Intracellular Ca2+ plays an essential role in plant cellular sensing of various environmental stress signals by modulating the activity of Ca2+-binding proteins. Leymus chinensis is a dominant forage grass widely distributed in the Eurasian Steppe that is well adapted to drought and salty soils common in the region. Through transcript profiling of L. chinensis roots, we identified a transcript predicted to encode histidine-rich calcium-binding protein (HRC), a protein recently characterized in wheat. L. chinensis HRC (LcH RC) localized in the nucleus, as demonstrated using a transient gene expression method that we developed for this species. Different regions of LcHRC showed affinity for either Ca2+ or Zn2+, but not Mg2+ and Mn2+. Arabidopsis thaliana seedlings heterologously overexpressing LcHRC showed greater sensitivity to abscisic acid (ABA), along with decreased expression of some ABA-induced marker genes, but no increase in ABA content. Screening a Arabidopsis cDNA yeast library identified a Tudor/PWWP/MBT-domain-containing protein (AtPWWP3) that interacts with LcHRC. AtPWWP3 also localized in the nucleus and is predicted to mediate gene expression by modifying histone deacetylation. Based on these results, we propose a functional model of LcHRC action.
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Affiliation(s)
- Ju Yang
- Key Laboratory of Forage and Endemic Crop Biotechnology, Ministry of Education, School of Life Sciences, Inner Mongolia University, Hohhot, 010010, PR China; State Key Laboratory of Reproductive Regulatory and Breeding of Grassland Livestock, Inner Mongolia University, Hohhot, 010010, PR China
| | - Ting Zhang
- Key Laboratory of Forage and Endemic Crop Biotechnology, Ministry of Education, School of Life Sciences, Inner Mongolia University, Hohhot, 010010, PR China; State Key Laboratory of Reproductive Regulatory and Breeding of Grassland Livestock, Inner Mongolia University, Hohhot, 010010, PR China
| | - Huiping Mao
- Key Laboratory of Forage and Endemic Crop Biotechnology, Ministry of Education, School of Life Sciences, Inner Mongolia University, Hohhot, 010010, PR China; State Key Laboratory of Reproductive Regulatory and Breeding of Grassland Livestock, Inner Mongolia University, Hohhot, 010010, PR China
| | - Huiqing Jin
- Research Centre for Horticultural Science and Technology of Hohhot, Hohhot, 010020, PR China
| | - Yongwei Sun
- Key Laboratory of Forage and Endemic Crop Biotechnology, Ministry of Education, School of Life Sciences, Inner Mongolia University, Hohhot, 010010, PR China; State Key Laboratory of Reproductive Regulatory and Breeding of Grassland Livestock, Inner Mongolia University, Hohhot, 010010, PR China
| | - Zhi Qi
- Key Laboratory of Forage and Endemic Crop Biotechnology, Ministry of Education, School of Life Sciences, Inner Mongolia University, Hohhot, 010010, PR China; State Key Laboratory of Reproductive Regulatory and Breeding of Grassland Livestock, Inner Mongolia University, Hohhot, 010010, PR China.
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157
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Li ZG. Regulative role of calcium signaling on methylglyoxal-improved heat tolerance in maize ( Zea mays L) seedlings. PLANT SIGNALING & BEHAVIOR 2020; 15:1788303. [PMID: 32603245 PMCID: PMC8550205 DOI: 10.1080/15592324.2020.1788303] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2020] [Revised: 06/20/2020] [Accepted: 06/22/2020] [Indexed: 05/07/2023]
Abstract
Nowadays, calcium (Ca2+) and methylglyoxal (MG) are all deemed to be second messengers in plants, which participate in various physiological processes, such as seed germination, seedling establishment, plant growth and development, as well as response to environmental stress. However, the Ca2+-MG interaction in the development of thermotolerance in maize seedlings remains unclear. Here, using maize seedlings as materials, the crosstalk between Ca2+ and MG signaling in the acquisition of thermotolerance was explored. The results showed that root-irrigation with Ca2+ and MG alone or in combination increased the survival rate of maize seedlings under heat stress, mitigated the decrease in the tissue vitality, and reduced the membrane lipid peroxidation (in term of the content of malondialdehyde), indicating that Ca2+ and MG could improve the thermotolerance in maize seedlings. In addition, MG-improved thermotolerance was impaired by ethylene glycol-bis(b-aminoethylether)-N,N,N΄,N΄-tetraacetic acid (a Ca2+ chelator), La3+ (plasma membrane Ca2+ channel blocker), ruthenium red (a mitochondrial Ca2+ channel blocker), neomycin (vacuole Ca2+ channel blocker), caffeine (an endoplasmic reticulum Ca2+ channel blocker), and calmodulin antagonists (chlorpromazine and trifluoperazine), respectively. Also, MG scavengers (N-acetyl-cysteine, aminoguanidine, and vitamin B6) had no significant effect on Ca2+-triggered thermotolerance (in terms of survival rate, malondialdehyde, and tissue vitality) of maize seedlings. The data illustrated that calcium signaling regulated MG-improved thermotolerance in maize seedlings by mobilizing intracellular and extracellular Ca2+ pools.
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Affiliation(s)
- Zhong-Guang Li
- School of Life Sciences, Yunnan Normal University, Kunming, P.R. China
- Engineering Research Center of Sustainable Development and Utilization of Biomass Energy, Ministry of Education, Kunming, P.R. China
- Key Laboratory of Biomass Energy and Environmental Biotechnology, Yunnan Province, Yunnan Normal University, Kunming, P.R. China
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158
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Martins V, Gerós H. The grapevine CAX-interacting protein VvCXIP4 is exported from the nucleus to activate the tonoplast Ca 2+/H + exchanger VvCAX3. PLANTA 2020; 252:35. [PMID: 32767128 DOI: 10.1007/s00425-020-03442-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Accepted: 07/31/2020] [Indexed: 06/11/2023]
Abstract
The nuclear-localized CAX-interacting protein VvCXIP4 is exported to the cytosol after a Ca2+ pulse, to activate the tonoplast-localized Ca2+/H+ exchanger VvCAX3. Vacuolar cation/H+ exchangers (CAXs) have long been recognized as 'housekeeping' components in cellular Ca2+ and trace metal homeostasis, being involved in a range of key cellular and physiological processes. However, the mechanisms that drive functional activation of the transporters are largely unknown. In the present study, we investigated the function of a putative grapevine CAX-interacting protein, VvCXIP4, by testing its ability to activate VvCAX3, previously characterized as a tonoplast-localized Ca2+/H+ exchanger. VvCAX3 contains an autoinhibitory domain that drives inactivation of the transporter and thus, is incapable of suppressing the Ca2+-hypersensitive phenotype of the S. cerevisiae mutant K667. In this study, the co-expression of VvCXIP4 and VvCAX3 in this strain efficiently rescued its growth defect at high Ca2+ levels. Flow cytometry experiments showed that yeast harboring both proteins effectively accumulated higher Ca2+ levels than cells expressing each of the proteins separately. Bimolecular fluorescence complementation (BiFC) assays allowed visualization of the direct interaction between the proteins in tobacco plants and in yeast, and also showed the self-interaction of VvCAX3 but not of VvCXIP4. Subcellular localization studies showed that, despite being primarily localized to the nucleus, VvCXIP4 is able to move to other cell compartments upon a Ca2+ stimulus, becoming prone to interaction with the tonoplast-localized VvCAX3. qPCR analysis showed that both genes are more expressed in grapevine stems and leaves, followed by the roots, and that the steady-state transcript levels were higher in the pulp than in the skin of grape berries. Also, both VvCXIP4 and VvCAX3 were upregulated by Ca2+ and Na+, indicating they share common regulatory mechanisms. However, VvCXIP4 was also upregulated by Li+, Cu2+ and Mn2+, and its expression increased steadily throughout grape berry development, contrary to VvCAX3, suggesting additional physiological roles for VvCXIP4, including the regulation of VvCAXs not yet functionally characterized. The main novelty of the present study was the demonstration of physical interaction between CXIP and CAX proteins from a woody plant model by BiFC assays, demonstrating the intracellular mobilization of CXIPs in response to Ca2+.
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Affiliation(s)
- Viviana Martins
- Centre of Molecular and Environmental Biology, Department of Biology, University of Minho, Campus de Gualtar, 4710-057, Braga, Portugal.
- Centre for the Research and Technology of Agro-Environmental and Biological Sciences, University of Trás-Os-Montes and Alto Douro, 5001-801, Vila Real, Portugal.
| | - Hernâni Gerós
- Centre of Molecular and Environmental Biology, Department of Biology, University of Minho, Campus de Gualtar, 4710-057, Braga, Portugal
- Centre for the Research and Technology of Agro-Environmental and Biological Sciences, University of Trás-Os-Montes and Alto Douro, 5001-801, Vila Real, Portugal
- Centre of Biological Engineering (CEB), Department of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057, Braga, Portugal
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159
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Yu Y, Xuan Y, Bian X, Zhang L, Pan Z, Kou M, Cao Q, Tang Z, Li Q, Ma D, Li Z, Sun J. Overexpression of phosphatidylserine synthase IbPSS1 affords cellular Na + homeostasis and salt tolerance by activating plasma membrane Na +/H + antiport activity in sweet potato roots. HORTICULTURE RESEARCH 2020; 7:131. [PMID: 32821414 PMCID: PMC7395154 DOI: 10.1038/s41438-020-00358-1] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Revised: 05/28/2020] [Accepted: 06/03/2020] [Indexed: 05/21/2023]
Abstract
Phosphatidylserine synthase (PSS)-mediated phosphatidylserine (PS) synthesis is crucial for plant development. However, little is known about the contribution of PSS to Na+ homeostasis regulation and salt tolerance in plants. Here, we cloned the IbPSS1 gene, which encodes an ortholog of Arabidopsis AtPSS1, from sweet potato (Ipomoea batatas (L.) Lam.). The transient expression of IbPSS1 in Nicotiana benthamiana leaves increased PS abundance. We then established an efficient Agrobacterium rhizogenes-mediated in vivo root transgenic system for sweet potato. Overexpression of IbPSS1 through this system markedly decreased cellular Na+ accumulation in salinized transgenic roots (TRs) compared with adventitious roots. The overexpression of IbPSS1 enhanced salt-induced Na+/H+ antiport activity and increased plasma membrane (PM) Ca2+-permeable channel sensitivity to NaCl and H2O2 in the TRs. We confirmed the important role of IbPSS1 in improving salt tolerance in transgenic sweet potato lines obtained from an Agrobacterium tumefaciens-mediated transformation system. Similarly, compared with the wild-type (WT) plants, the transgenic lines presented decreased Na+ accumulation, enhanced Na+ exclusion, and increased PM Ca2+-permeable channel sensitivity to NaCl and H2O2 in the roots. Exogenous application of lysophosphatidylserine triggered similar shifts in Na+ accumulation and Na+ and Ca2+ fluxes in the salinized roots of WT. Overall, this study provides an efficient and reliable transgenic method for functional genomic studies of sweet potato. Our results revealed that IbPSS1 contributes to the salt tolerance of sweet potato by enabling Na+ homeostasis and Na+ exclusion in the roots, and the latter process is possibly controlled by PS reinforcing Ca2+ signaling in the roots.
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Affiliation(s)
- Yicheng Yu
- Jiangsu Key Laboratory of Phylogenomics and Comparative Genomics, School of Life Sciences, Jiangsu Normal University, 221116 Xuzhou, Jiangsu China
| | - Ying Xuan
- Jiangsu Key Laboratory of Phylogenomics and Comparative Genomics, School of Life Sciences, Jiangsu Normal University, 221116 Xuzhou, Jiangsu China
| | - Xiaofeng Bian
- Institute of Food Crops, Provincial Key Laboratory of Agrobiology, Jiangsu Academy of Agricultural Sciences, 210014 Nanjing, China
| | - Lei Zhang
- Jiangsu Key Laboratory of Phylogenomics and Comparative Genomics, School of Life Sciences, Jiangsu Normal University, 221116 Xuzhou, Jiangsu China
| | - Zhiyuan Pan
- Jiangsu Key Laboratory of Phylogenomics and Comparative Genomics, School of Life Sciences, Jiangsu Normal University, 221116 Xuzhou, Jiangsu China
| | - Meng Kou
- Jiangsu Key Laboratory of Phylogenomics and Comparative Genomics, School of Life Sciences, Jiangsu Normal University, 221116 Xuzhou, Jiangsu China
- Xuzhou Institute of Agricultural Sciences in Jiangsu Xuhuai District, 221131 Xuzhou, Jiangsu Province China
| | - Qinghe Cao
- Xuzhou Institute of Agricultural Sciences in Jiangsu Xuhuai District, 221131 Xuzhou, Jiangsu Province China
| | - Zhonghou Tang
- Xuzhou Institute of Agricultural Sciences in Jiangsu Xuhuai District, 221131 Xuzhou, Jiangsu Province China
| | - Qiang Li
- Xuzhou Institute of Agricultural Sciences in Jiangsu Xuhuai District, 221131 Xuzhou, Jiangsu Province China
| | - Daifu Ma
- Xuzhou Institute of Agricultural Sciences in Jiangsu Xuhuai District, 221131 Xuzhou, Jiangsu Province China
| | - Zongyun Li
- Jiangsu Key Laboratory of Phylogenomics and Comparative Genomics, School of Life Sciences, Jiangsu Normal University, 221116 Xuzhou, Jiangsu China
| | - Jian Sun
- Jiangsu Key Laboratory of Phylogenomics and Comparative Genomics, School of Life Sciences, Jiangsu Normal University, 221116 Xuzhou, Jiangsu China
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160
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Alnayef M, Solis C, Shabala L, Ogura T, Chen Z, Bose J, Maathuis FJM, Venkataraman G, Tanoi K, Yu M, Zhou M, Horie T, Shabala S. Changes in Expression Level of OsHKT1;5 Alters Activity of Membrane Transporters Involved in K + and Ca 2+ Acquisition and Homeostasis in Salinized Rice Roots. Int J Mol Sci 2020; 21:E4882. [PMID: 32664377 PMCID: PMC7402344 DOI: 10.3390/ijms21144882] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Revised: 07/05/2020] [Accepted: 07/06/2020] [Indexed: 01/02/2023] Open
Abstract
In rice, the OsHKT1;5 gene has been reported to be a critical determinant of salt tolerance. This gene is harbored by the SKC1 locus, and its role was attributed to Na+ unloading from the xylem. No direct evidence, however, was provided in previous studies. Also, the reported function of SKC1 on the loading and delivery of K+ to the shoot remains to be explained. In this work, we used an electrophysiological approach to compare the kinetics of Na+ uptake by root xylem parenchyma cells using wild type (WT) and NIL(SKC1) plants. Our data showed that Na+ reabsorption was observed in WT, but not NIL(SKC1) plants, thus questioning the functional role of HKT1;5 as a transporter operating in the direct Na+ removal from the xylem. Instead, changes in the expression level of HKT1;5 altered the activity of membrane transporters involved in K+ and Ca2+ acquisition and homeostasis in the rice epidermis and stele, explaining the observed phenotype. We conclude that the role of HKT1;5 in plant salinity tolerance cannot be attributed to merely reducing Na+ concentration in the xylem sap but triggers a complex feedback regulation of activities of other transporters involved in the maintenance of plant ionic homeostasis and signaling under stress conditions.
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Affiliation(s)
- Mohammad Alnayef
- Tasmanian Institute of Agriculture, University of Tasmania, Hobart, TAS 7005, Australia; (M.A.); (C.S.); (L.S.); (T.O.); (J.B.); (M.Z.)
| | - Celymar Solis
- Tasmanian Institute of Agriculture, University of Tasmania, Hobart, TAS 7005, Australia; (M.A.); (C.S.); (L.S.); (T.O.); (J.B.); (M.Z.)
- School of Science and Health, Western Sydney University, Penrith, NSW 2751, Australia;
| | - Lana Shabala
- Tasmanian Institute of Agriculture, University of Tasmania, Hobart, TAS 7005, Australia; (M.A.); (C.S.); (L.S.); (T.O.); (J.B.); (M.Z.)
- International Research Centre for Environmental Membrane Biology, Foshan University, Foshan 528000, China;
| | - Takaaki Ogura
- Tasmanian Institute of Agriculture, University of Tasmania, Hobart, TAS 7005, Australia; (M.A.); (C.S.); (L.S.); (T.O.); (J.B.); (M.Z.)
- Graduate School of Agricultural and Life Sciences, University of Tokyo, Tokyo 113-8657, Japan;
| | - Zhonghua Chen
- School of Science and Health, Western Sydney University, Penrith, NSW 2751, Australia;
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith, NSW 2751, Australia
| | - Jayakumar Bose
- Tasmanian Institute of Agriculture, University of Tasmania, Hobart, TAS 7005, Australia; (M.A.); (C.S.); (L.S.); (T.O.); (J.B.); (M.Z.)
- Australian Research Council Centre of Excellence in Plant Energy Biology, School of Agriculture, Food and Wine, University of Adelaide, Glen Osmond, SA 5064, Australia
| | | | - Gayatri Venkataraman
- Plant Molecular Biology Laboratory, M.S. Swaminathan Research Foundation, Chennai 600113, India;
| | - Keitaro Tanoi
- Graduate School of Agricultural and Life Sciences, University of Tokyo, Tokyo 113-8657, Japan;
| | - Min Yu
- International Research Centre for Environmental Membrane Biology, Foshan University, Foshan 528000, China;
| | - Meixue Zhou
- Tasmanian Institute of Agriculture, University of Tasmania, Hobart, TAS 7005, Australia; (M.A.); (C.S.); (L.S.); (T.O.); (J.B.); (M.Z.)
| | - Tomoaki Horie
- Division of Applied Biology, Faculty of Textile Science and Technology, Shinshu University, Nagano 386-8567, Japan;
| | - Sergey Shabala
- Tasmanian Institute of Agriculture, University of Tasmania, Hobart, TAS 7005, Australia; (M.A.); (C.S.); (L.S.); (T.O.); (J.B.); (M.Z.)
- International Research Centre for Environmental Membrane Biology, Foshan University, Foshan 528000, China;
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161
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Zhang W, Jiang L, Huang J, Ding Y, Liu Z. Loss of proton/calcium exchange 1 results in the activation of plant defense and accelerated senescence in Arabidopsis. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2020; 296:110472. [PMID: 32540002 DOI: 10.1016/j.plantsci.2020.110472] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Revised: 03/10/2020] [Accepted: 03/14/2020] [Indexed: 06/11/2023]
Abstract
Cytosolic Ca2+ increases in response to many stimuli. CAX1 (H+/Ca2+ exchanger 1) maintains calcium homeostasis by transporting calcium from the cytosol to vacuoles. Here, we determined that the cax1 mutant exhibits enhanced resistance against both an avirulent biotrophic pathogen Pst-avrRpm1 (Pseudomonas syringae pv tomato DC3000 avrRpm1), and a necrotrophic pathogen, B. cinerea (Botrytis cinerea). The defense hormone SA (salicylic acid) and phytoalexin scopoletin, which fight against biotrophs and necrotrophs respectively, accumulated more in cax1 than wild-type. Moreover, the cax1 mutant exhibited early senescence after exogenous Ca2+ application. The accelerated senescence in the cax1 mutant was dependent on SID2 (salicylic acid induction deficient 2) but not on NPR1 (nonexpressor of pathogenesis-related genes1). Additionally, the introduction of CAX1 into the cax1 mutant resulted in phenotypes similar to that of wild-type in terms of Ca2+-conditioned senescence and Pst-avrRpm1 and B. cinerea infections. However, disruption of CAX3, the homolog of CAX1, did not produce an obvious phenotype. Moreover, exogenous Ca2+ application on plants resulted in increased resistance to both Pst-avrRpm1 and B. cinerea. Therefore, we conclude that the disruption of CAX1, but not CAX3, causes the activation of pathogen defense mechanisms, probably through the manipulation of calcium homeostasis or other signals.
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Affiliation(s)
- Wei Zhang
- College of Bioengineering, Sichuan University of Science and Engineering, Zigong, 643000, Sichuan, China
| | - Lihui Jiang
- College of Bioengineering, Sichuan University of Science and Engineering, Zigong, 643000, Sichuan, China
| | - Jin Huang
- Key Laboratory of Plant Development and Environmental Adaptation Biology, Ministry of Education, School of Life Sciences, Shandong University, Qingdao, 266237, China
| | - Yongqiang Ding
- Key Laboratory of Bio-Resources and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, 610064, Sichuan, China
| | - Zhibin Liu
- Key Laboratory of Bio-Resources and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, 610064, Sichuan, China.
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162
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Tian W, Wang C, Gao Q, Li L, Luan S. Calcium spikes, waves and oscillations in plant development and biotic interactions. NATURE PLANTS 2020; 6:750-759. [PMID: 32601423 DOI: 10.1038/s41477-020-0667-6] [Citation(s) in RCA: 140] [Impact Index Per Article: 35.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Accepted: 04/15/2020] [Indexed: 05/08/2023]
Abstract
The calcium ion (Ca2+) is a universal signal in all eukaryotic cells. A fundamental question is how Ca2+, a simple cation, encodes complex information with high specificity. Extensive research has established a two-step process (encoding and decoding) that governs the specificity of Ca2+ signals. While the encoding mechanism entails a complex array of channels and transporters, the decoding process features a number of Ca2+ sensors and effectors that convert Ca2+ signals into cellular effects. Along this general paradigm, some signalling components may be highly conserved, but others are divergent among different organisms. In plant cells, Ca2+ participates in numerous signalling processes, and here we focus on the latest discoveries on Ca2+-encoding mechanisms in development and biotic interactions. In particular, we use examples such as polarized cell growth of pollen tube and root hair in which tip-focused Ca2+ oscillations specify the signalling events for rapid cell elongation. In plant-microbe interactions, Ca2+ spiking and oscillations hold the key to signalling specificity: while pathogens elicit cytoplasmic spiking, symbiotic microorganisms trigger nuclear Ca2+ oscillations. Herbivore attacks or mechanical wounding can trigger Ca2+ waves traveling a long distance to transmit and convert the local signal to a systemic defence program in the whole plant. What channels and transporters work together to carve out the spatial and temporal patterns of the Ca2+ fluctuations? This question has remained enigmatic for decades until recent studies uncovered Ca2+ channels that orchestrate specific Ca2+ signatures in each of these processes. Future work will further expand the toolkit for Ca2+-encoding mechanisms and place Ca2+ signalling steps into larger signalling networks.
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Affiliation(s)
- Wang Tian
- Department of Plant and Microbial Biology, University of California, Berkeley, Berkeley, CA, USA
- School of Life Sciences, Northwest University, Xi'an, China
| | - Chao Wang
- Department of Plant and Microbial Biology, University of California, Berkeley, Berkeley, CA, USA
| | - Qifei Gao
- Department of Plant and Microbial Biology, University of California, Berkeley, Berkeley, CA, USA
- School of Life Sciences, Northwest University, Xi'an, China
| | - Legong Li
- School of Life Sciences, Capital Normal University, Beijing, China
| | - Sheng Luan
- Department of Plant and Microbial Biology, University of California, Berkeley, Berkeley, CA, USA.
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163
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Qiu L, Wang Y, Qu H. Loading calcium fluorescent probes into protoplasts to detect calcium in the flesh tissue cells of Malus domestica. HORTICULTURE RESEARCH 2020; 7:91. [PMID: 32528703 PMCID: PMC7261807 DOI: 10.1038/s41438-020-0315-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Revised: 03/03/2020] [Accepted: 03/20/2020] [Indexed: 05/23/2023]
Abstract
Cytosolic Ca2+ plays a key role in signal transduction in plants. Calcium imaging is the most common approach to studying dynamic changes in the cytoplasmic Ca2+ content. Here, we used mature 'Fuji' apples (Malus pumila Mill.) to obtain viable protoplasts from flesh tissue cells by enzymatic hydrolysis; then, three small-molecule fluorescent probes (fluo-8/AM, fluo-4/AM, and rhod-2/AM) were loaded into the protoplasts. All three Ca2+ fluorescent probes successfully entered the cytoplasm but did not enter the vacuole. Both the Ca2+ chelator (EGTA) and Ca2+ channel blocker (La3+) reduced the fluorescence intensity in the cytoplasm. The calcium ionophore A23187 increased the fluorescence intensity in the cytoplasm at 5 µmol/L but decreased it at 50 µmol/L. Additionally, A23187 reversed the fluorescence intensity in the cytoplasm, which was decreased by La3+. Ionomycin is also a calcium ionophore that can increase the fluorescence intensity of calcium in the cytoplasm. These results suggest that small-molecule Ca2+ fluorescent probes can be used to detect changes in cytosolic calcium levels in the cells of fruit flesh tissue. In addition, the optimum concentration of fluo-8/AM was determined to be 5 µmol/L. This was the first time that protoplasts have been isolated from apple flesh tissue cells and small-molecule fluorescent probes have been used to detect calcium in the cytoplasm of flesh tissue cells. This study provides a new method to study calcium signal transduction in fruit flesh tissue.
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Affiliation(s)
- Lina Qiu
- College of Horticulture, Qingdao Agricultural University, Qingdao City, China
| | - Yongzhang Wang
- College of Horticulture, Qingdao Agricultural University, Qingdao City, China
| | - Haiyong Qu
- College of Horticulture, Qingdao Agricultural University, Qingdao City, China
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164
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Adem GD, Chen G, Shabala L, Chen ZH, Shabala S. GORK Channel: A Master Switch of Plant Metabolism? TRENDS IN PLANT SCIENCE 2020; 25:434-445. [PMID: 31964604 DOI: 10.1016/j.tplants.2019.12.012] [Citation(s) in RCA: 66] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Revised: 11/23/2019] [Accepted: 12/10/2019] [Indexed: 05/18/2023]
Abstract
Potassium regulates a plethora of metabolic and developmental response in plants, and upon exposure to biotic and abiotic stresses a substantial K+ loss occurs from plant cells. The outward-rectifying potassium efflux GORK channels are central to this stress-induced K+ loss from the cytosol. In the mammalian systems, signaling molecules such as gamma-aminobutyric acid, G-proteins, ATP, inositol, and protein phosphatases were shown to operate as ligands controlling many K+ efflux channels. Here we present the evidence that the same molecules may also regulate GORK channels in plants. This mechanism enables operation of the GORK channels as a master switch of the cell metabolism, thus adjusting intracellular K+ homeostasis to altered environmental conditions, to maximize plant adaptive potential.
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Affiliation(s)
- Getnet D Adem
- Tasmanian Institute for Agriculture, University of Tasmania, Hobart, TAS 7001, Australia
| | - Guang Chen
- Collaborative Innovation Centre for Grain Industry, College of Agriculture, Yangtze University, Jingzhou 434025, China; College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310058, China
| | - Lana Shabala
- Tasmanian Institute for Agriculture, University of Tasmania, Hobart, TAS 7001, Australia
| | - Zhong-Hua Chen
- School of Science and Health, Western Sydney University, Penrith, NSW 2751, Australia; Hawkesbury Institute for the Environment, Western Sydney University, Penrith, NSW 2751, Australia.
| | - Sergey Shabala
- Tasmanian Institute for Agriculture, University of Tasmania, Hobart, TAS 7001, Australia; International Research Centre for Environmental Membrane Biology, Foshan University, Foshan 528000, China.
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165
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De-Jesús-García R, Rosas U, Dubrovsky JG. The barrier function of plant roots: biological bases for selective uptake and avoidance of soil compounds. FUNCTIONAL PLANT BIOLOGY : FPB 2020; 47:383-397. [PMID: 32213271 DOI: 10.1071/fp19144] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2019] [Accepted: 12/16/2019] [Indexed: 06/10/2023]
Abstract
The root is the main organ through which water and mineral nutrients enter the plant organism. In addition, root fulfils several other functions. Here, we propose that the root also performs the barrier function, which is essential not only for plant survival but for plant acclimation and adaptation to a constantly changing and heterogeneous soil environment. This function is related to selective uptake and avoidance of some soil compounds at the whole plant level. We review the toolkit of morpho-anatomical, structural, and other components that support this view. The components of the root structure involved in selectivity, permeability or barrier at a cellular, tissue, and organ level and their properties are discussed. In consideration of the arguments supporting barrier function of plant roots, evolutionary aspects of this function are also reviewed. Additionally, natural variation in selective root permeability is discussed which suggests that the barrier function is constantly evolving and is subject of natural selection.
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Affiliation(s)
- Ramces De-Jesús-García
- Departamento de Biología Molecular de Plantas, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Avenuenida Universidad 2001, Colonia Chamilpa, Cuernavaca, Morelos 62210, Mexico
| | - Ulises Rosas
- Jardín Botánico, Instituto de Biología, Universidad Nacional Autónoma de México, 04510, CDMX, Mexico
| | - Joseph G Dubrovsky
- Departamento de Biología Molecular de Plantas, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Avenuenida Universidad 2001, Colonia Chamilpa, Cuernavaca, Morelos 62210, Mexico; and Corresponding author.
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166
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Gong Z, Xiong L, Shi H, Yang S, Herrera-Estrella LR, Xu G, Chao DY, Li J, Wang PY, Qin F, Li J, Ding Y, Shi Y, Wang Y, Yang Y, Guo Y, Zhu JK. Plant abiotic stress response and nutrient use efficiency. SCIENCE CHINA-LIFE SCIENCES 2020; 63:635-674. [PMID: 32246404 DOI: 10.1007/s11427-020-1683-x] [Citation(s) in RCA: 534] [Impact Index Per Article: 133.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2020] [Accepted: 03/17/2020] [Indexed: 12/15/2022]
Abstract
Abiotic stresses and soil nutrient limitations are major environmental conditions that reduce plant growth, productivity and quality. Plants have evolved mechanisms to perceive these environmental challenges, transmit the stress signals within cells as well as between cells and tissues, and make appropriate adjustments in their growth and development in order to survive and reproduce. In recent years, significant progress has been made on many fronts of the stress signaling research, particularly in understanding the downstream signaling events that culminate at the activation of stress- and nutrient limitation-responsive genes, cellular ion homeostasis, and growth adjustment. However, the revelation of the early events of stress signaling, particularly the identification of primary stress sensors, still lags behind. In this review, we summarize recent work on the genetic and molecular mechanisms of plant abiotic stress and nutrient limitation sensing and signaling and discuss new directions for future studies.
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Affiliation(s)
- Zhizhong Gong
- State Key Laboratory of Plant Physiology and Biochemistry, College of Biological Sciences, China Agricultural University, Beijing, 100193, China
| | - Liming Xiong
- Department of Biology, Hong Kong Baptist University, Kowlong Tong, Hong Kong, China
| | - Huazhong Shi
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, TX, 79409, USA
| | - Shuhua Yang
- State Key Laboratory of Plant Physiology and Biochemistry, College of Biological Sciences, China Agricultural University, Beijing, 100193, China
| | - Luis R Herrera-Estrella
- Plant and Soil Science Department (IGCAST), Texas Tech University, Lubbock, TX, 79409, USA.,Unidad de Genómica Avanzada (Langebio), Centro de Investigación y de Estudios Avanzados, Irapuato, 36610, México.,College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, China
| | - Guohua Xu
- College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, China
| | - Dai-Yin Chao
- National Key laboratory of Plant Molecular Genetics, CAS Center for Excellence in Molecular Plant Sciences, Shanghai Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai, 200032, China
| | - Jingrui Li
- State Key Laboratory of Plant Physiology and Biochemistry, College of Biological Sciences, China Agricultural University, Beijing, 100193, China
| | - Peng-Yun Wang
- School of Life Science, Henan University, Kaifeng, 457000, China
| | - Feng Qin
- State Key Laboratory of Plant Physiology and Biochemistry, College of Biological Sciences, China Agricultural University, Beijing, 100193, China
| | - Jijang Li
- State Key Laboratory of Plant Physiology and Biochemistry, College of Biological Sciences, China Agricultural University, Beijing, 100193, China
| | - Yanglin Ding
- State Key Laboratory of Plant Physiology and Biochemistry, College of Biological Sciences, China Agricultural University, Beijing, 100193, China
| | - Yiting Shi
- State Key Laboratory of Plant Physiology and Biochemistry, College of Biological Sciences, China Agricultural University, Beijing, 100193, China
| | - Yu Wang
- State Key Laboratory of Plant Physiology and Biochemistry, College of Biological Sciences, China Agricultural University, Beijing, 100193, China
| | - Yongqing Yang
- State Key Laboratory of Plant Physiology and Biochemistry, College of Biological Sciences, China Agricultural University, Beijing, 100193, China
| | - Yan Guo
- State Key Laboratory of Plant Physiology and Biochemistry, College of Biological Sciences, China Agricultural University, Beijing, 100193, China.
| | - Jian-Kang Zhu
- Shanghai Center for Plant Stress Biology, CAS Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, Shanghai, 200032, China.
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167
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Zhou Z, Zhao Y, Bi G, Liang X, Zhou JM. Early signalling mechanisms underlying receptor kinase-mediated immunity in plants. Philos Trans R Soc Lond B Biol Sci 2020; 374:20180310. [PMID: 30967025 DOI: 10.1098/rstb.2018.0310] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Pattern-recognition receptors (PRRs), which are single transmembrane proteins belonging to the receptor-like kinase (RLK) and receptor-like protein (RLP) super families, sense microbe- and host-derived molecular patterns to activate immune responses in plants. PRRs associate with co-receptors, scaffold proteins and receptor-like cytoplasmic kinases (RLCKs) to form immune receptor complexes at the cell surface, allowing activation of cellular responses upon perception of extracellular ligands. Recent advances have uncovered new mechanisms by which these immune receptor complexes are regulated at the levels of composition, stability and activity. It has become clear that RLCKs are central components directly linking PRRs to multiple downstream signalling modules. Furthermore, new studies have provided important insights into the regulation of reactive oxygen species, mitogen-activated protein (MAP) kinase cascades and heterotrimeric G proteins, which has not only deepened our understanding of immunity, but also expanded our view of transmembrane signalling in general. This article is part of the theme issue 'Biotic signalling sheds light on smart pest management'.
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Affiliation(s)
- Zhaoyang Zhou
- State Key Laboratory of Plant Genomics, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences , No. 1 West Beichen Road, Chaoyang District, Beijing 100101 , People's Republic of China
| | - Yan Zhao
- State Key Laboratory of Plant Genomics, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences , No. 1 West Beichen Road, Chaoyang District, Beijing 100101 , People's Republic of China
| | - Guozhi Bi
- State Key Laboratory of Plant Genomics, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences , No. 1 West Beichen Road, Chaoyang District, Beijing 100101 , People's Republic of China
| | - Xiangxiu Liang
- State Key Laboratory of Plant Genomics, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences , No. 1 West Beichen Road, Chaoyang District, Beijing 100101 , People's Republic of China
| | - Jian-Min Zhou
- State Key Laboratory of Plant Genomics, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences , No. 1 West Beichen Road, Chaoyang District, Beijing 100101 , People's Republic of China
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168
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Huang X, Duan S, Wu Q, Yu M, Shabala S. Reducing Cadmium Accumulation in Plants: Structure-Function Relations and Tissue-Specific Operation of Transporters in the Spotlight. PLANTS (BASEL, SWITZERLAND) 2020; 9:E223. [PMID: 32050442 PMCID: PMC7076666 DOI: 10.3390/plants9020223] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Revised: 02/05/2020] [Accepted: 02/06/2020] [Indexed: 01/11/2023]
Abstract
Cadmium (Cd) is present in many soils and, when entering the food chain, represents a major health threat to humans. Reducing Cd accumulation in plants is complicated by the fact that most known Cd transporters also operate in the transport of essential nutrients such as Zn, Fe, Mn, or Cu. This work summarizes the current knowledge of mechanisms mediating Cd uptake, radial transport, and translocation within the plant. It is concluded that real progress in the field may be only achieved if the transport of Cd and the above beneficial micronutrients is uncoupled, and we discuss the possible ways of achieving this goal. Accordingly, we suggest that the major focus of research in the field should be on the structure-function relations of various transporter isoforms and the functional assessment of their tissue-specific operation. Of specific importance are two tissues. The first one is a xylem parenchyma in plant roots; a major "controller" of Cd loading into the xylem and its transport to the shoot. The second one is a phloem tissue that operates in the last step of a metal transport. Another promising and currently underexplored avenue is to understand the role of non-selective cation channels in Cd uptake and reveal mechanisms of their regulation.
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Affiliation(s)
- Xin Huang
- International Research Center for Environmental Membrane Biology, Foshan University, Foshan 528000, China; (X.H.); (S.D.); (Q.W.); (M.Y.)
| | - Songpo Duan
- International Research Center for Environmental Membrane Biology, Foshan University, Foshan 528000, China; (X.H.); (S.D.); (Q.W.); (M.Y.)
| | - Qi Wu
- International Research Center for Environmental Membrane Biology, Foshan University, Foshan 528000, China; (X.H.); (S.D.); (Q.W.); (M.Y.)
| | - Min Yu
- International Research Center for Environmental Membrane Biology, Foshan University, Foshan 528000, China; (X.H.); (S.D.); (Q.W.); (M.Y.)
| | - Sergey Shabala
- International Research Center for Environmental Membrane Biology, Foshan University, Foshan 528000, China; (X.H.); (S.D.); (Q.W.); (M.Y.)
- Tasmanian Institute of Agriculture, University of Tasmania, Hobart TAS 7001, Australia
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169
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Zarei M, Shabala S, Zeng F, Chen X, Zhang S, Azizi M, Rahemi M, Davarpanah S, Yu M, Shabala L. Comparing Kinetics of Xylem Ion Loading and Its Regulation in Halophytes and Glycophytes. PLANT & CELL PHYSIOLOGY 2020; 61:403-415. [PMID: 31693150 DOI: 10.1093/pcp/pcz205] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2019] [Accepted: 10/29/2019] [Indexed: 05/02/2023]
Abstract
Although control of xylem ion loading is essential to confer salinity stress tolerance, specific details behind this process remain elusive. In this work, we compared the kinetics of xylem Na+ and K+ loading between two halophytes (Atriplex lentiformis and quinoa) and two glycophyte (pea and beans) species, to understand the mechanistic basis of the above process. Halophyte plants had high initial amounts of Na+ in the leaf, even when grown in the absence of the salt stress. This was matched by 7-fold higher xylem sap Na+ concentration compared with glycophyte plants. Upon salinity exposure, the xylem sap Na+ concentration increased rapidly but transiently in halophytes, while in glycophytes this increase was much delayed. Electrophysiological experiments using the microelectrode ion flux measuring technique showed that glycophyte plants tend to re-absorb Na+ back into the stele, thus reducing xylem Na+ load at the early stages of salinity exposure. The halophyte plants, however, were capable to release Na+ even in the presence of high Na+ concentrations in the xylem. The presence of hydrogen peroxide (H2O2) [mimicking NaCl stress-induced reactive oxygen species (ROS) accumulation in the root] caused a massive Na+ and Ca2+ uptake into the root stele, while triggering a substantial K+ efflux from the cytosol into apoplast in glycophyte but not halophytes species. The peak in H2O2 production was achieved faster in halophytes (30 min vs 4 h) and was attributed to the increased transcript levels of RbohE. Pharmacological data suggested that non-selective cation channels are unlikely to play a major role in ROS-mediated xylem Na+ loading.
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Affiliation(s)
- Mahvash Zarei
- Department of Horticultural Science, Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad, Iran
| | - Sergey Shabala
- International Research Centre for Environmental Membrane Biology, Foshan University, Foshan, China
- Tasmanian Institute of Agriculture, College of Science and Engineering, University of Tasmania, Hobart, TAS, Australia
| | - Fanrong Zeng
- Agronomy Department, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China
| | - Xiaohui Chen
- Agronomy Department, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China
| | - Shuo Zhang
- Agronomy Department, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China
| | - Majid Azizi
- Department of Horticultural Science, Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad, Iran
| | - Majid Rahemi
- Department of Horticultural Science, Faculty of Agriculture, Shiraz University, Shiraz, Iran
| | - Sohrab Davarpanah
- Department of Horticultural Science, Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad, Iran
| | - Min Yu
- International Research Centre for Environmental Membrane Biology, Foshan University, Foshan, China
| | - Lana Shabala
- Tasmanian Institute of Agriculture, College of Science and Engineering, University of Tasmania, Hobart, TAS, Australia
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170
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Rubio F, Nieves-Cordones M, Horie T, Shabala S. Doing 'business as usual' comes with a cost: evaluating energy cost of maintaining plant intracellular K + homeostasis under saline conditions. THE NEW PHYTOLOGIST 2020; 225:1097-1104. [PMID: 30993727 DOI: 10.1111/nph.15852] [Citation(s) in RCA: 88] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2018] [Accepted: 03/31/2019] [Indexed: 05/27/2023]
Abstract
Salinization of agricultural lands is a major threat to agriculture. Many different factors affect and determine plant salt tolerance. Nonetheless, there is a consensus on the relevance of maintaining an optimal cytosolic potassium : sodium ion (K+ : Na+ ) ratio for salinity tolerance in plants. This ratio depends on the operation of plasma membrane and tonoplast transporters. In the present review we focus on some aspects related to the energetic cost of maintaining that K+ : Na+ ratio. One of the factors that affect the cost of the first step of K+ acquisition - root K+ uptake through High Affinity K+ transporter and Arabidopsis K+ transport system 1 transport systems - is the value of the plasma membrane potential of root cells, a parameter that may differ amongst plant species. In addition to its role in nutrition, cytosolic K+ also is important for signalling, and K+ efflux through gated outward-rectifying K+ and nonselective cation channels can be regarded as a switch to redirect energy towards defence reactions. In maintaining cytosolic K+ , the great buffer capacity of the vacuole should be considered. The possible role of high-affinity K+ transporters (HKT)2s in mediating K+ uptake under saline conditions and the importance of cycling of K+ throughout the plant also are discussed.
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Affiliation(s)
- Francisco Rubio
- Plant Nutrition Department, CEBAS-CSIC, Campus de Espinardo, Murcia, 30100, Spain
| | | | - Tomoaki Horie
- Division of Applied Biology, Shinshu University, 3-15-1, Tokida, Ueda, Nagano, 386-8567, Japan
| | - Sergey Shabala
- Tasmanian Institute for Agriculture, University of Tasmania, Hobart, Tasmania, 7005, Australia
- International Centre for Environmental Membrane Biology, Foshan University, Foshan, 528041, China
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171
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Meng JG, Liang L, Jia PF, Wang YC, Li HJ, Yang WC. Integration of ovular signals and exocytosis of a Ca 2+ channel by MLOs in pollen tube guidance. NATURE PLANTS 2020; 6:143-153. [PMID: 32055051 DOI: 10.1038/s41477-020-0599-1] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2019] [Accepted: 01/15/2020] [Indexed: 05/22/2023]
Abstract
The spatiotemporal regulation of Ca2+ channels at the plasma membrane in response to extracellular signals is critical for development, stress response and reproduction, but is poorly understood. During flowering-plant reproduction, pollen tubes grow directionally to the ovule, which is guided by ovule-derived signals and dependent on Ca2+ dynamics. However, it is unknown how ovular signals are integrated with cytosolic Ca2+ dynamics in the pollen tube. Here, we show that MILDEW RESISTANCE LOCUS O 5 (MLO5), MLO9 and MLO15 are required for pollen tube responses to ovular signals in Arabidopsis thaliana. Phenotypically distinct from the ovule-bypass phenotype of previously identified mutants, mlo5 mlo9 double-mutant and mlo5 mlo9 mlo15 triple-mutant pollen tubes twist and pile up after sensing the ovular cues. Molecular studies reveal that MLO5 and MLO9 selectively recruit Ca2+ channel CNGC18-containing vesicles to the plasma membrane through the R-SNARE proteins VAMP721 and VAMP722 in trans mode. This study identifies members of the conserved seven transmembrane MLO family (expressed in the pollen tube) as tethering factors for Ca2+ channels, reveals a novel mechanism of molecular integration of extracellular ovular cues and selective exocytosis, and sheds light on the general regulation of MLO proteins in cell responses to environmental stimuli.
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Affiliation(s)
- Jiang-Guo Meng
- State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Liang Liang
- State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China
| | - Peng-Fei Jia
- State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China
| | - Ying-Chun Wang
- State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China
| | - Hong-Ju Li
- State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China.
| | - Wei-Cai Yang
- State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China.
- Collage of Advanced Agricultural Sciences, University of Chinese Academy of Sciences, Beijing, China.
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172
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Shabala S, Chen G, Chen ZH, Pottosin I. The energy cost of the tonoplast futile sodium leak. THE NEW PHYTOLOGIST 2020; 225:1105-1110. [PMID: 30802968 DOI: 10.1111/nph.15758] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2018] [Accepted: 02/10/2019] [Indexed: 05/18/2023]
Abstract
Active removal of Na+ from the cytosol into the vacuole plays a critical role in salinity tissue tolerance, but another, often neglected component of this trait is Na+ retention in vacuoles. This retention is based on an efficient control of Na+ -permeable slow- and fast-vacuolar channels that mediate the back-leak of Na+ into cytosol and, if not regulated tightly, could result in a futile cycle. This Tansley insight summarizes our current knowledge of regulation of tonoplast Na+ -permeable channels and discusses the energy cost of vacuolar Na+ sequestration, under different scenarios. We also report on a phylogenetic and bioinformatic analysis of the plant two-pore channel family and the difference in its structure and regulation between halophytes and glycophytes, in the context of salinity tolerance.
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Affiliation(s)
- Sergey Shabala
- International Centre for Environmental Membrane Biology, Foshan University, Foshan, 528041, China
- Tasmanian Institute for Agriculture, College of Science and Engineering, University of Tasmania, Hobart, Tas, 7005, Australia
| | - Guang Chen
- Department of Biology, University of Florida, Gainesville, FL, 32611, USA
| | - Zhong-Hua Chen
- School of Science and Health, Hawkesbury Institute for the Environment, Western Sydney University, Penrith, NSW, 2751, Australia
| | - Igor Pottosin
- Centro Universitario de Investigaciones Biomédicas, Universidad de Colima, Colima, 28045, México
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173
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Munns R, Day DA, Fricke W, Watt M, Arsova B, Barkla BJ, Bose J, Byrt CS, Chen ZH, Foster KJ, Gilliham M, Henderson SW, Jenkins CLD, Kronzucker HJ, Miklavcic SJ, Plett D, Roy SJ, Shabala S, Shelden MC, Soole KL, Taylor NL, Tester M, Wege S, Wegner LH, Tyerman SD. Energy costs of salt tolerance in crop plants. THE NEW PHYTOLOGIST 2020; 225:1072-1090. [PMID: 31004496 DOI: 10.1111/nph.15864] [Citation(s) in RCA: 177] [Impact Index Per Article: 44.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Accepted: 03/25/2019] [Indexed: 05/21/2023]
Abstract
Agriculture is expanding into regions that are affected by salinity. This review considers the energetic costs of salinity tolerance in crop plants and provides a framework for a quantitative assessment of costs. Different sources of energy, and modifications of root system architecture that would maximize water vs ion uptake are addressed. Energy requirements for transport of salt (NaCl) to leaf vacuoles for osmotic adjustment could be small if there are no substantial leaks back across plasma membrane and tonoplast in root and leaf. The coupling ratio of the H+ -ATPase also is a critical component. One proposed leak, that of Na+ influx across the plasma membrane through certain aquaporin channels, might be coupled to water flow, thus conserving energy. For the tonoplast, control of two types of cation channels is required for energy efficiency. Transporters controlling the Na+ and Cl- concentrations in mitochondria and chloroplasts are largely unknown and could be a major energy cost. The complexity of the system will require a sophisticated modelling approach to identify critical transporters, apoplastic barriers and root structures. This modelling approach will inform experimentation and allow a quantitative assessment of the energy costs of NaCl tolerance to guide breeding and engineering of molecular components.
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Affiliation(s)
- Rana Munns
- Australian Research Council (ARC) Centre of Excellence in Plant Energy Biology, and School of Agriculture and Environment, The University of Western Australia, Crawley, WA, 6009, Australia
- CSIRO Agriculture and Food, Canberra, ACT, 2601, Australia
| | - David A Day
- College of Science and Engineering, Flinders University, GPO Box 2100, Adelaide, South Australia, 5001, Australia
| | - Wieland Fricke
- School of Biology and Environmental Sciences, University College Dublin (UCD), Dublin, 4, Ireland
| | - Michelle Watt
- Plant Sciences, Institute of Bio and Geosciences, Forschungszentrum Juelich, Helmholtz Association, 52425, Juelich, Germany
| | - Borjana Arsova
- Plant Sciences, Institute of Bio and Geosciences, Forschungszentrum Juelich, Helmholtz Association, 52425, Juelich, Germany
| | - Bronwyn J Barkla
- Southern Cross Plant Science, Southern Cross University, Lismore, NSW, 2481, Australia
| | - Jayakumar Bose
- Australian Research Council (ARC) Centre of Excellence in Plant Energy Biology, School of Agriculture, Food and Wine, University of Adelaide, Glen Osmond, SA, 5064, Australia
| | - Caitlin S Byrt
- Australian Research Council (ARC) Centre of Excellence in Plant Energy Biology, School of Agriculture, Food and Wine, University of Adelaide, Glen Osmond, SA, 5064, Australia
- Research School of Biology, Australian National University, Canberra, ACT, 2600, Australia
| | - Zhong-Hua Chen
- School of Science and Health, Western Sydney University, Penrith, NSW, 2751, Australia
| | - Kylie J Foster
- Phenomics and Bioinformatics Research Centre, School of Information Technology and Mathematical Sciences, University of South Australia, Mawson Lakes, SA, 5095, Australia
| | - Matthew Gilliham
- Australian Research Council (ARC) Centre of Excellence in Plant Energy Biology, School of Agriculture, Food and Wine, University of Adelaide, Glen Osmond, SA, 5064, Australia
| | - Sam W Henderson
- Commonwealth Scientific and Industrial Research Organisation, Agriculture and Food, Urrbrae, SA, 5064, Australia
| | - Colin L D Jenkins
- College of Science and Engineering, Flinders University, GPO Box 2100, Adelaide, South Australia, 5001, Australia
| | - Herbert J Kronzucker
- School of Agriculture and Food, Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Melbourne, VIC, 3010, Australia
| | - Stanley J Miklavcic
- Phenomics and Bioinformatics Research Centre, School of Information Technology and Mathematical Sciences, University of South Australia, Mawson Lakes, SA, 5095, Australia
| | - Darren Plett
- School of Agriculture and Food, Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Melbourne, VIC, 3010, Australia
| | - Stuart J Roy
- Australian Research Council (ARC) Industrial Transformation Research Hub for Wheat in a Hot and Dry Climate, School of Agriculture, Food and Wine, University of Adelaide, Urrbrae, SA, 5064, Australia
| | - Sergey Shabala
- Tasmanian Institute for Agriculture, University of Tasmania, Private Bag 54, Hobart, Tas., 7001, Australia
- International Centre for Environmental Membrane Biology, Foshan University, Foshan, 528000, China
| | - Megan C Shelden
- Australian Research Council (ARC) Centre of Excellence in Plant Energy Biology, School of Agriculture, Food and Wine, University of Adelaide, Glen Osmond, SA, 5064, Australia
| | - Kathleen L Soole
- College of Science and Engineering, Flinders University, GPO Box 2100, Adelaide, South Australia, 5001, Australia
| | - Nicolas L Taylor
- Australian Research Council (ARC) Centre of Excellence in Plant Energy Biology, School of Molecular Sciences and Institute of Agriculture, The University of Western Australia, Crawley, WA, 6009, Australia
| | - Mark Tester
- Biological and Environmental Sciences & Engineering Division (BESE), King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia
| | - Stefanie Wege
- Australian Research Council (ARC) Centre of Excellence in Plant Energy Biology, School of Agriculture, Food and Wine, University of Adelaide, Glen Osmond, SA, 5064, Australia
| | - Lars H Wegner
- Karlsruhe Institute of Technology, Institute for Pulsed Power and Microwave Technology (IHM), D-76344, Eggenstein-Leopoldshafen, Germany
| | - Stephen D Tyerman
- Australian Research Council (ARC) Centre of Excellence in Plant Energy Biology, School of Agriculture, Food and Wine, University of Adelaide, Glen Osmond, SA, 5064, Australia
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174
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Tanveer M, Shabala S. Neurotransmitters in Signalling and Adaptation to Salinity Stress in Plants. NEUROTRANSMITTERS IN PLANT SIGNALING AND COMMUNICATION 2020. [DOI: 10.1007/978-3-030-54478-2_3] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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175
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Hryvusevich P, Navaselsky I, Talkachova Y, Straltsova D, Keisham M, Viatoshkin A, Samokhina V, Smolich I, Sokolik A, Huang X, Yu M, Bhatla SC, Demidchik V. Sodium Influx and Potassium Efflux Currents in Sunflower Root Cells Under High Salinity. FRONTIERS IN PLANT SCIENCE 2020; 11:613936. [PMID: 33537049 PMCID: PMC7848100 DOI: 10.3389/fpls.2020.613936] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2020] [Accepted: 12/14/2020] [Indexed: 05/08/2023]
Abstract
Helianthus annuus L. is an important oilseed crop, which exhibits moderate salt tolerance and can be cultivated in areas affected by salinity. Using patch-clamp electrophysiology, we have characterized Na+ influx and K+ efflux conductances in protoplasts of salt-tolerant H. annuus L. hybrid KBSH-53 under high salinity. This work demonstrates that the plasma membrane of sunflower root cells has a classic set of ionic conductances dominated by K+ outwardly rectifying channels (KORs) and non-selective cation channels (NSCCs). KORs in sunflower show extreme Na+ sensitivity at high extracellular [Ca2+] that can potentially have a positive adaptive effect under salt stress (decreasing K+ loss). Na+ influx currents in sunflower roots demonstrate voltage-independent activation, lack time-dependent component, and are sensitive to Gd3+. Sunflower Na+-permeable NSCCs mediate a much weaker Na+ influx currents on the background of physiological levels of Ca2+ as compared to other species. This suggests that sunflower NSCCs have greater Ca2+ sensitivity. The responses of Na+ influx to Ca2+ correlates well with protection of sunflower growth by external Ca2+ in seedlings treated with NaCl. It can be, thus, hypothesized that NaCl tolerance in sunflower seedling roots is programmed at the ion channel level via their sensitivity to Ca2+ and Na+.
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Affiliation(s)
- Palina Hryvusevich
- International Research Centre for Environmental Membrane Biology, Foshan University, Foshan, China
- Department of Plant Cell Biology and Bioengineering, Biological Faculty, Belarusian State University, Minsk, Belarus
| | - Ilya Navaselsky
- Department of Plant Cell Biology and Bioengineering, Biological Faculty, Belarusian State University, Minsk, Belarus
| | - Yuliya Talkachova
- Department of Plant Cell Biology and Bioengineering, Biological Faculty, Belarusian State University, Minsk, Belarus
| | - Darya Straltsova
- Department of Plant Cell Biology and Bioengineering, Biological Faculty, Belarusian State University, Minsk, Belarus
| | - Monika Keisham
- Laboratory of Plant Physiology and Biochemistry, Department of Botany, University of Delhi, New Delhi, India
| | - Aliaksei Viatoshkin
- Department of Plant Cell Biology and Bioengineering, Biological Faculty, Belarusian State University, Minsk, Belarus
| | - Veranika Samokhina
- Department of Plant Cell Biology and Bioengineering, Biological Faculty, Belarusian State University, Minsk, Belarus
| | - Igor Smolich
- Department of Plant Cell Biology and Bioengineering, Biological Faculty, Belarusian State University, Minsk, Belarus
| | - Anatoliy Sokolik
- Department of Plant Cell Biology and Bioengineering, Biological Faculty, Belarusian State University, Minsk, Belarus
| | - Xin Huang
- International Research Centre for Environmental Membrane Biology, Foshan University, Foshan, China
| | - Min Yu
- International Research Centre for Environmental Membrane Biology, Foshan University, Foshan, China
| | - Satish Chander Bhatla
- Laboratory of Plant Physiology and Biochemistry, Department of Botany, University of Delhi, New Delhi, India
| | - Vadim Demidchik
- International Research Centre for Environmental Membrane Biology, Foshan University, Foshan, China
- Department of Plant Cell Biology and Bioengineering, Biological Faculty, Belarusian State University, Minsk, Belarus
- *Correspondence: Vadim Demidchik,
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176
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Navazio L, Formentin E, Cendron L, Szabò I. Chloroplast Calcium Signaling in the Spotlight. FRONTIERS IN PLANT SCIENCE 2020; 11:186. [PMID: 32226434 PMCID: PMC7081724 DOI: 10.3389/fpls.2020.00186] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2019] [Accepted: 02/07/2020] [Indexed: 05/22/2023]
Abstract
Calcium has long been known to regulate the metabolism of chloroplasts, concerning both light and carbon reactions of photosynthesis, as well as additional non photosynthesis-related processes. In addition to undergo Ca2+ regulation, chloroplasts can also influence the overall Ca2+ signaling pathways of the plant cell. Compelling evidence indicate that chloroplasts can generate specific stromal Ca2+ signals and contribute to the fine tuning of cytoplasmic Ca2+ signaling in response to different environmental stimuli. The recent set up of a toolkit of genetically encoded Ca2+ indicators, targeted to different chloroplast subcompartments (envelope, stroma, thylakoids) has helped to unravel the participation of chloroplasts in intracellular Ca2+ handling in resting conditions and during signal transduction. Intra-chloroplast Ca2+ signals have been demonstrated to occur in response to specific environmental stimuli, suggesting a role for these plant-unique organelles in transducing Ca2+-mediated stress signals. In this mini-review we present current knowledge of stimulus-specific intra-chloroplast Ca2+ transients, as well as recent advances in the identification and characterization of Ca2+-permeable channels/transporters localized at chloroplast membranes. In particular, the potential role played by cMCU, a chloroplast-localized member of the mitochondrial calcium uniporter (MCU) family, as component of plant environmental sensing is discussed in detail, taking into account some specific structural features of cMCU. In summary, the recent molecular identification of some players of chloroplast Ca2+ signaling has opened new avenues in this rapidly developing field and will hopefully allow a deeper understanding of the role of chloroplasts in shaping physiological responses in plants.
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Affiliation(s)
- Lorella Navazio
- Department of Biology, University of Padova, Padova, Italy
- Botanical Garden, University of Padova, Padova, Italy
| | - Elide Formentin
- Department of Biology, University of Padova, Padova, Italy
- Botanical Garden, University of Padova, Padova, Italy
| | - Laura Cendron
- Department of Biology, University of Padova, Padova, Italy
| | - Ildikò Szabò
- Department of Biology, University of Padova, Padova, Italy
- Botanical Garden, University of Padova, Padova, Italy
- *Correspondence: Ildikò Szabò,
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177
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Assessment of Subcellular ROS and NO Metabolism in Higher Plants: Multifunctional Signaling Molecules. Antioxidants (Basel) 2019; 8:antiox8120641. [PMID: 31842380 PMCID: PMC6943533 DOI: 10.3390/antiox8120641] [Citation(s) in RCA: 204] [Impact Index Per Article: 40.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2019] [Revised: 12/01/2019] [Accepted: 12/06/2019] [Indexed: 12/22/2022] Open
Abstract
Reactive oxygen species (ROS) and nitric oxide (NO) are produced in all aerobic life forms under both physiological and adverse conditions. Unregulated ROS/NO generation causes nitro-oxidative damage, which has a detrimental impact on the function of essential macromolecules. ROS/NO production is also involved in signaling processes as secondary messengers in plant cells under physiological conditions. ROS/NO generation takes place in different subcellular compartments including chloroplasts, mitochondria, peroxisomes, vacuoles, and a diverse range of plant membranes. This compartmentalization has been identified as an additional cellular strategy for regulating these molecules. This assessment of subcellular ROS/NO metabolisms includes the following processes: ROS/NO generation in different plant cell sites; ROS interactions with other signaling molecules, such as mitogen-activated protein kinases (MAPKs), phosphatase, calcium (Ca2+), and activator proteins; redox-sensitive genes regulated by the iron-responsive element/iron regulatory protein (IRE-IRP) system and iron regulatory transporter 1(IRT1); and ROS/NO crosstalk during signal transduction. All these processes highlight the complex relationship between ROS and NO metabolism which needs to be evaluated from a broad perspective.
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178
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Li H, Jiang X, Lv X, Ahammed GJ, Guo Z, Qi Z, Yu J, Zhou Y. Tomato GLR3.3 and GLR3.5 mediate cold acclimation-induced chilling tolerance by regulating apoplastic H 2 O 2 production and redox homeostasis. PLANT, CELL & ENVIRONMENT 2019; 42:3326-3339. [PMID: 31329293 DOI: 10.1111/pce.13623] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2019] [Revised: 05/23/2019] [Accepted: 07/18/2019] [Indexed: 05/26/2023]
Abstract
Plant glutamate receptor-like (GLR) genes play important roles in plant development and immune response. However, the functions of GLRs in abiotic stress response remain unclear. Here we show that cold acclimation at 12°C induced the transcripts of GLR3.3 and GLR3.5 with increased tolerance against a subsequent chilling at 4 °C. Silencing of GLR3.3 or/and GLR3.5 or application of the antagonist of ionotropic glutamate receptor 6,7-dinitroquinoxaline-2,3-dione (DNQX), all compromised the acclimation-induced increases in the transcripts of respiratory burst oxidase homolog1 (RBOH1), activity of NADPH oxidase, the accumulation of apoplastic H2 O2 and the ratio of reduced glutathione (GSH) to oxidized glutathione (GSSG), resulting in an attenuated chilling tolerance; the effect, however, was rescued by foliar application of H2 O2 or GSH. Both RBOH1-silenced and glutathione biosynthesis genes, γ- glutamylcysteine synthetase (GSH1)- and glutathione synthetase (GSH2)-cosilenced plants had decreased chilling tolerance with reduced GSH/GSSG ratio. Moreover, application of DNQX had little effects on the GSH/GSSG ratio and the tolerance in RBOH1-silenced plants and GSH1- and GSH2-cosilenced plants. These findings unmasked the functional hierarchy of GLR-H2 O2 -glutathione cascade and shed new light on cold response pathway in tomato plants.
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Affiliation(s)
- Huizi Li
- Department of Horticulture, Zijingang Campus, Zhejiang University, Hangzhou, 310058, P.R. China
| | - Xiaochun Jiang
- Department of Horticulture, Zijingang Campus, Zhejiang University, Hangzhou, 310058, P.R. China
| | - Xiangzhang Lv
- Department of Horticulture, Zijingang Campus, Zhejiang University, Hangzhou, 310058, P.R. China
| | - Golam Jalal Ahammed
- College of Forestry, Henan University of Science and Technology, Luoyang, 471000, P.R. China
| | - Zhixin Guo
- Department of Horticulture, Zijingang Campus, Zhejiang University, Hangzhou, 310058, P.R. China
| | - Zhenyu Qi
- Zhejiang Univ, Agr Expt Stn, Hangzhou, 310058, P.R. China
| | - Jingquan Yu
- Department of Horticulture, Zijingang Campus, Zhejiang University, Hangzhou, 310058, P.R. China
| | - Yanhong Zhou
- Department of Horticulture, Zijingang Campus, Zhejiang University, Hangzhou, 310058, P.R. China
- Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, Hangzhou, 310058, P.R. China
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179
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Zhang C, Wang X, Liu X, Fan Y, Zhang Y, Zhou X, Li W. A Novel ' Candidatus Liberibacter asiaticus'-Encoded Sec-Dependent Secretory Protein Suppresses Programmed Cell Death in Nicotiana benthamiana. Int J Mol Sci 2019; 20:E5802. [PMID: 31752214 PMCID: PMC6888338 DOI: 10.3390/ijms20225802] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2019] [Revised: 11/12/2019] [Accepted: 11/15/2019] [Indexed: 12/28/2022] Open
Abstract
'Candidatus Liberibacter asiaticus' (CLas) is one of the causal agents of citrus Huanglongbing (HLB), a bacterial disease of citrus trees that greatly reduces fruit yield and quality. CLas strains produce an array of currently uncharacterized Sec-dependent secretory proteins. In this study, the conserved chromosomally encoded protein CLIBASIA_03875 was identified as a novel Sec-dependent secreted protein. We show that CLIBASIA_03875 contains a putative Sec- secretion signal peptide (SP), a 29 amino acid residue located at the N-terminus, with a mature protein (m3875) of 22 amino acids found to localize in multiple subcellular components of the leaf epidermal cells of Nicotiana benthamiana. When overexpressed via a Potato virus X (PVX)-based expression vector in N. benthamiana, m3875 suppressed programmed cell death (PCD) and the H2O2 accumulation triggered by the pro-apoptotic mouse protein BAX and the Phytophthora infestans elicitin INF1. Overexpression also resulted in a phenotype of dwarfing, leaf deformation and mosaics, suggesting that m3875 has roles in plant immune response, growth, and development. Substitution mutagenesis of the charged amino acid (D7, R9, R11, and K22) with alanine within m3875 did not recover the phenotypes for PCD and normal growth. In addition, the transiently overexpressed m3875 regulated the transcriptional levels of N. benthamiana orthologs of CNGCs (cyclic nucleotide-gated channels), BI-1 (Bax-inhibitor 1), and WRKY33 that are involved in plant defense mechanisms. To our knowledge, m3875 is the first PCD suppressor identified from CLas. Studying the function of this protein provides insight as to how CLas attenuates the host immune responses to proliferate and cause Huanglongbing disease in citrus plants.
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Affiliation(s)
- Chao Zhang
- Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100094, China;
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China; (X.L.); (Y.F.); (Y.Z.)
| | - Xuefeng Wang
- Citrus Research Institute, Southwest University, Chongqing 400712, China;
| | - Xuelu Liu
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China; (X.L.); (Y.F.); (Y.Z.)
- Citrus Research Institute, Southwest University, Chongqing 400712, China;
| | - Yanyan Fan
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China; (X.L.); (Y.F.); (Y.Z.)
- College of Life Science, Shandong Normal University, Jinan 250014, China
| | - Yongqiang Zhang
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China; (X.L.); (Y.F.); (Y.Z.)
| | - Xueping Zhou
- Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100094, China;
| | - Weimin Li
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China; (X.L.); (Y.F.); (Y.Z.)
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180
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Chen J, Li H, Yang K, Wang Y, Yang L, Hu L, Liu R, Shi Z. Melatonin facilitates lateral root development by coordinating PAO-derived hydrogen peroxide and Rboh-derived superoxide radical. Free Radic Biol Med 2019; 143:534-544. [PMID: 31520769 DOI: 10.1016/j.freeradbiomed.2019.09.011] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/19/2019] [Revised: 09/10/2019] [Accepted: 09/10/2019] [Indexed: 10/26/2022]
Abstract
Melatonin, a phytochemical, can regulate lateral root (LR) formation, but the downstream signaling of melatonin remains elusive. Here we investigated the roles of hydrogen peroxide (H2O2) and superoxide radical (O2•‾) in melatonin-promoted LR formation in tomato (Solanum lycopersicum) roots by using physiological, histochemical, bioinformatic, and biochemical approaches. The increase in endogenous melatonin level stimulated reactive oxygen species (ROS)-dependent development of lateral root primordia (LRP) and LR. Melatonin promoted LRP/LR formation and modulated the expression of cell cycle genes (SlCDKA1, SlCYCD3;1, and SlKRP2) by stimulating polyamine oxidase (PAO)-dependent H2O2 production and respiratory burst oxidase homologue (Rboh)-dependent O2•‾ production, respectively. Screening of SlPAOs and SlRbohs gene family combined with gene expression analysis suggested that melatonin-promoted LR formation was correlated to the upregulation of SlPAO1, SlRboh3, and SlRboh4 in LR-emerging zone. Transient expression analysis confirmed that SlPAO1 was able to produce H2O2 while SlRboh3 and SlRboh4 were capable of producing O2•‾. Melatonin-ROS signaling cassette was also found in the regulation of LR formation in rice root and lateral hyphal branching in fungi. These results suggested that SlPAO1-H2O2 and SlRboh3/4-O2•‾ acted as downstream of melatonin to regulate the expression of cell cycle genes, resulting in LRP initiation and LR development. Such findings uncover one of the regulatory pathways for melatonin-regulated LR formation, which extends our knowledge for melatonin-regulated plant intrinsic physiology.
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Affiliation(s)
- Jian Chen
- Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, 210014, China.
| | - Hui Li
- Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, 210014, China
| | - Kang Yang
- Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, 210014, China
| | - Yongzhu Wang
- Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, 210014, China
| | - Lifei Yang
- College of Horticulture, Nanjing Agricultural University, Nanjing, 210095, China
| | - Liangbin Hu
- Department of Food Science, Henan Institute of Science and Technology, Xinxiang, 453003, China
| | - Ruixian Liu
- Institute of Industrial Crops, Jiangsu Academy of Agricultural Sciences, Nanjing, 210014, China
| | - Zhiqi Shi
- Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, 210014, China.
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Wang K, Zheng X, Zhang X, Zhao L, Yang Q, Boateng NAS, Ahima J, Liu J, Zhang H. Comparative Transcriptomic Analysis of the Interaction between Penicillium expansum and Apple Fruit ( Malus pumila Mill.) during Early Stages of Infection. Microorganisms 2019; 7:microorganisms7110495. [PMID: 31661784 PMCID: PMC6920851 DOI: 10.3390/microorganisms7110495] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2019] [Revised: 10/20/2019] [Accepted: 10/21/2019] [Indexed: 01/26/2023] Open
Abstract
Blue mold, caused by Penicillium expansum, is an important postharvest disease of apple, and can result in significant economic losses. The present study investigated the interaction between P. expansum and wounded apple fruit tissues during the early stages of the infection. Spores of P. expansum became activated one hour post-inoculation (hpi), exhibited swelling at 3 hpi, and the germ tubes were found entering into apple tissues at 6 hpi. RNA-seq was performed on samples of P. expansum and apple fruit tissue collected at 1, 3, and 6 hpi. The main differentially expressed genes (DEGs) that were identified in P. expansum were related to interaction, cell wall degradation enzymes, anti-oxidative stress, pH regulation, and effectors. Apple tissues responded to the presence of P. expansum by activating pathogen-associated molecular pattern (PAMP)-triggered immunity (PTI) at 1 hpi, then activated effector-triggered immunity (ETI) at 3 hpi. This research provides new information on the interaction between P. expansum and apple fruit tissue at an early stage of the infection process.
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Affiliation(s)
- Kaili Wang
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China.
| | - Xiangfeng Zheng
- School of Food Science and Engineering, Yangzhou University, Yangzhou 225009, China.
| | - Xiaoyun Zhang
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China.
| | - Lina Zhao
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China.
| | - Qiya Yang
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China.
| | | | - Joseph Ahima
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China.
| | - Jia Liu
- Chongqing Key Laboratory of Economic Plant Biotechnology, College of Landscape Architecture and Life Science/Institute of Special Plants, Chongqing University of Arts and Sciences, Yongchuan, Chongqing 402160, China.
| | - Hongyin Zhang
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China.
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182
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Wang Y, Liu Q, Xie J, Feng R, Ma F, Wang F, Shen S, Wen T. Dcf1 Affects Memory and Anxiety by Regulating NMDA and AMPA Receptors. Neurochem Res 2019; 44:2499-2505. [PMID: 31531752 DOI: 10.1007/s11064-019-02866-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2019] [Revised: 08/17/2019] [Accepted: 08/24/2019] [Indexed: 02/02/2023]
Abstract
The hippocampus is critical for memory and emotion and both N-methyl-D-aspartate (NMDA) and α-amino-3-hydroxy-5-methyl- 4-isoxazolepropionic acid (AMPA) receptors are known to contribute for those processes. However, the underlying molecular mechanisms remain poorly understood. We have previously found that mice undergo memory decline upon dcf1 deletion through ES gene knockout. In the present study, a nervous system-specific dcf1 knockout (NKO) mouse was constructed, which was found to present severely damaged neuronal morphology. The damaged neurons caused structural abnormalities in dendritic spines and decreased synaptic density. Decreases in hippocampal NMDA and AMPA receptors of NKO mice lead to abnormal long term potentiation (LTP) at DG, with significantly decreased performance in the water maze, elevated- plus maze, open field and light and dark test. Investigation into the underlying molecular mechanisms revealed that dendritic cell factor 1 (Dcf1) contributes for memory and emotion by regulating NMDA and AMPA receptors. Our results broaden the understanding of synaptic plasticity's role in cognitive function, thereby expanding its known list of functions.
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Affiliation(s)
- Yajiang Wang
- Laboratory of Molecular Neural Biology, School of Life Sciences, Shanghai University, 381 Nanchen Road, Shanghai, 200444, China
| | - Qiang Liu
- Laboratory of Molecular Neural Biology, School of Life Sciences, Shanghai University, 381 Nanchen Road, Shanghai, 200444, China
| | - Jiayang Xie
- Laboratory of Molecular Neural Biology, School of Life Sciences, Shanghai University, 381 Nanchen Road, Shanghai, 200444, China
| | - Ruili Feng
- Laboratory of Molecular Neural Biology, School of Life Sciences, Shanghai University, 381 Nanchen Road, Shanghai, 200444, China
| | - Fangfang Ma
- Laboratory of Molecular Neural Biology, School of Life Sciences, Shanghai University, 381 Nanchen Road, Shanghai, 200444, China
| | - Fushuai Wang
- Laboratory of Molecular Neural Biology, School of Life Sciences, Shanghai University, 381 Nanchen Road, Shanghai, 200444, China
| | - Shiyi Shen
- Laboratory of Molecular Neural Biology, School of Life Sciences, Shanghai University, 381 Nanchen Road, Shanghai, 200444, China
| | - Tieqiao Wen
- Laboratory of Molecular Neural Biology, School of Life Sciences, Shanghai University, 381 Nanchen Road, Shanghai, 200444, China.
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183
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Mu C, Zhou L, Shan L, Li F, Li Z. Phosphatase GhDsPTP3a interacts with annexin protein GhANN8b to reversely regulate salt tolerance in cotton (Gossypium spp.). THE NEW PHYTOLOGIST 2019; 223:1856-1872. [PMID: 30985940 DOI: 10.1111/nph.15850] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2019] [Accepted: 04/08/2019] [Indexed: 05/25/2023]
Abstract
Salinity is among the major factors limiting crop production worldwide. Despite having moderate salt-tolerance, cotton (Gossypium spp.) suffers severe yield losses to salinity stresses, largely due to being grown on saline-alkali and dry lands. To identify genetic determinants conferring salinity tolerance in cotton, we deployed a functional genomic screen using a cotton cDNA library in a virus-induced gene silencing (VIGS) vector. We have revealed that silencing of GhDsPTP3a, which encodes a protein phosphatase, increases cotton tolerance to salt stress. Yeast two-hybrid screens indicated that GhDsPTP3a interacts with GhANN8b, an annexin protein, which plays a positive role in regulating cotton response to salinity stress. Salt stress induces GhANN8b phosphorylation, which is subsequently dephosphorylated by GhDsPTP3a. Ectopic expression of GhDsPTP3a and GhANN8b oppositely regulates plant salt tolerance and calcium influx. In addition, we have revealed that silencing of GhDsPTP3a or GhANN8b exerts opposing roles in regulating GhSOS1 transcript levels, and ectopic expression of GhANN8b elevates Na+ efflux in Arabidopsis under salinity stress. Our study demonstrates that a cotton phosphatase GhDsPTP3a and an annexin protein GhANN8b interact and reversely modulate Ca2+ and Na+ fluxes in cotton salinity responses.
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Affiliation(s)
- Chun Mu
- State Key Laboratory of Plant Physiology and Biochemistry, College of Agronomy and Biotechnology, China Agricultural University, Beijing, 100193, China
| | - Lin Zhou
- State Key Laboratory of Plant Physiology and Biochemistry, College of Agronomy and Biotechnology, China Agricultural University, Beijing, 100193, China
| | - Libo Shan
- Department of Plant Pathology and Microbiology, Institute for Plant Genomics & Biotechnology, Texas A&M University, College Station, TX, 77843, USA
| | - Fangjun Li
- State Key Laboratory of Plant Physiology and Biochemistry, College of Agronomy and Biotechnology, China Agricultural University, Beijing, 100193, China
| | - Zhaohu Li
- State Key Laboratory of Plant Physiology and Biochemistry, College of Agronomy and Biotechnology, China Agricultural University, Beijing, 100193, China
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184
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Astier J, Mounier A, Santolini J, Jeandroz S, Wendehenne D. The evolution of nitric oxide signalling diverges between animal and green lineages. JOURNAL OF EXPERIMENTAL BOTANY 2019; 70:4355-4364. [PMID: 30820534 DOI: 10.1093/jxb/erz088] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Accepted: 02/07/2019] [Indexed: 05/17/2023]
Abstract
Nitric oxide (NO) is a ubiquitous signalling molecule with widespread distribution in prokaryotes and eukaryotes where it is involved in countless physiological processes. While the mechanisms governing nitric oxide (NO) synthesis and signalling are well established in animals, the situation is less clear in the green lineage. Recent investigations have shown that NO synthase, the major enzymatic source for NO in animals, is absent in land plants but present in a limited number of algae. The first detailed analysis highlighted that these new NO synthases are functional but display specific structural features and probably original catalytic activities. Completing this picture, analyses were undertaken in order to investigate whether major components of the prototypic NO/cyclic GMP signalling cascades mediating many physiological effects of NO in animals were also present in plants. Only a few homologues of soluble guanylate cyclases, cGMP-dependent protein kinases, cyclic nucleotide-gated channels, and cGMP-regulated phosphodiesterases were identified in some algal species and their presence did not correlate with that of NO synthases. In contrast, S-nitrosoglutathione reductase, a critical regulator of S-nitrosothiols, was recurrently found. Overall, these findings highlight that plants do not mediate NO signalling through the classical NO/cGMP signalling module and support the concept that S-nitrosation is a ubiquitous NO-dependent signalling mechanism.
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Affiliation(s)
- Jeremy Astier
- Agroécologie, AgroSup Dijon, CNRS, INRA, Université de Bourgogne, Université Bourgogne Franche-Comté, Dijon, France
| | - Arnaud Mounier
- Agroécologie, AgroSup Dijon, CNRS, INRA, Université de Bourgogne, Université Bourgogne Franche-Comté, Dijon, France
| | - Jérôme Santolini
- Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Université Paris-Sud, Université Paris-Saclay, Gif-sur-Yvette cedex, France
| | - Sylvain Jeandroz
- Agroécologie, AgroSup Dijon, CNRS, INRA, Université de Bourgogne, Université Bourgogne Franche-Comté, Dijon, France
| | - David Wendehenne
- Agroécologie, AgroSup Dijon, CNRS, INRA, Université de Bourgogne, Université Bourgogne Franche-Comté, Dijon, France
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185
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A perspective on the modulation of plant and animal two pore channels (TPCs) by the flavonoid naringenin. Biophys Chem 2019; 254:106246. [PMID: 31426023 DOI: 10.1016/j.bpc.2019.106246] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2019] [Revised: 08/03/2019] [Accepted: 08/03/2019] [Indexed: 12/17/2022]
Abstract
The inhibitory effect of the flavonoid naringenin on plant and human Two-Pore Channels (TPCs) was assessed by means of electrophysiological measurements. By acting on human TPC2, naringenin, was able to dampen intracellular calcium responses to VEGF in cultured human endothelial cells and to impair angiogenic activity in VEGF-containing matrigel plugs implanted in mice. Molecular docking predicts selective binding sites for naringenin in the TPC structure, thus suggesting a specific interaction between the flavonoid and the channel.
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186
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Matthus E, Wilkins KA, Davies JM. Iron availability modulates the Arabidopsis thaliana root calcium signature evoked by exogenous ATP. PLANT SIGNALING & BEHAVIOR 2019; 14:1640563. [PMID: 31304865 PMCID: PMC6768249 DOI: 10.1080/15592324.2019.1640563] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2019] [Accepted: 06/27/2019] [Indexed: 06/01/2023]
Abstract
Plants use changes in cytosolic free Ca2+ ("signatures") to encode information from the specific signals generated in development, immunity and stress perception. Phosphate availability has a significant impact on the Arabidopsis thaliana root calcium signatures generated in response to abiotic stress stimuli and exogenous purine nucleotides. In the case of the response to exogenous ATP, the effect of low phosphate availability is linked to abnormal iron and reactive oxygen species accumulation with iron deprivation's restoring normal signature dynamics. Here, the effect of iron deprivation with normal phosphate availability has been examined. Iron deprivation significantly alters the root calcium signature evoked by exogenous ATP and may link to levels of reactive oxygen species and callose deposition.
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Affiliation(s)
- Elsa Matthus
- Department of Plant Sciences, University of Cambridge, Cambridge, UK
| | - Katie A. Wilkins
- Department of Plant Sciences, University of Cambridge, Cambridge, UK
| | - Julia M. Davies
- Department of Plant Sciences, University of Cambridge, Cambridge, UK
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187
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Li ZG, Ye XY, Qiu XM. Glutamate signaling enhances the heat tolerance of maize seedlings by plant glutamate receptor-like channels-mediated calcium signaling. PROTOPLASMA 2019; 256:1165-1169. [PMID: 30675652 DOI: 10.1007/s00709-019-01351-9] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2018] [Accepted: 01/14/2019] [Indexed: 05/22/2023]
Abstract
Glutamate (Glu), a neurotransmitter in animal, is a novel signaling molecule in plants, which takes part in cellular metabolism, seed germination, plant growth, development, and long-distance information transfer. However, whether Glu can enhance the heat tolerance in maize seedlings and its relation to calcium signaling is still elusive. In this study, maize seedlings were pretreated with Glu and then exposed to heat stress. The results showed that Glu pretreatment enhanced the survival percentage of maize seedlings under heat tolerance, indicating that Glu could increase the heat tolerance of maize seedlings. The Glu-induced heat tolerance was weakened by exogenous calcium chloride, plasma membrane Ca2+ channel blocker (LaCl3), Ca2+ chelator (ethylene glycol-bis(b-aminoethylether)-N,N, N΄,N΄-tetraacetic acid), calmodulin antagonists (trifluoperazine and chlopromazine), and plant glutamate receptor-like antagonists (MgCl2 and 6,7-dinitroquinoxaline- 2,3-(1H,4H)- dione). These findings for the first time reported that Glu could increase the heat tolerance of maize seedlings by plant glutamate receptor-like channels-mediated calcium signaling.
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Affiliation(s)
- Zhong-Guang Li
- School of Life Sciences, Yunnan Normal University, Kunming, 650092, People's Republic of China.
- Engineering Research Center of Sustainable Development and Utilization of Biomass Energy, Ministry of Education, Kunming, 650092, People's Republic of China.
- Key Laboratory of Biomass Energy and Environmental Biotechnology, Yunnan Province, Yunnan Normal University, Kunming, 650092, People's Republic of China.
| | - Xin-Yu Ye
- School of Life Sciences, Yunnan Normal University, Kunming, 650092, People's Republic of China
- Engineering Research Center of Sustainable Development and Utilization of Biomass Energy, Ministry of Education, Kunming, 650092, People's Republic of China
- Key Laboratory of Biomass Energy and Environmental Biotechnology, Yunnan Province, Yunnan Normal University, Kunming, 650092, People's Republic of China
| | - Xue-Mei Qiu
- School of Life Sciences, Yunnan Normal University, Kunming, 650092, People's Republic of China
- Engineering Research Center of Sustainable Development and Utilization of Biomass Energy, Ministry of Education, Kunming, 650092, People's Republic of China
- Key Laboratory of Biomass Energy and Environmental Biotechnology, Yunnan Province, Yunnan Normal University, Kunming, 650092, People's Republic of China
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188
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Medvedev S, Voronina O, Tankelyun O, Bilova T, Suslov D, Bankin M, Mackievic V, Makavitskaya M, Shishova M, Martinec J, Smolikova G, Sharova E, Demidchik V. Phosphatidic acids mediate transport of Ca 2+ and H + through plant cell membranes. FUNCTIONAL PLANT BIOLOGY : FPB 2019; 46:533-542. [PMID: 30940327 DOI: 10.1071/fp18242] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2018] [Accepted: 01/31/2019] [Indexed: 06/09/2023]
Abstract
Phosphatidic acids (PAs) are a key intermediate in phospholipid biosynthesis, and a central element in numerous signalling pathways. Functions of PAs are related to their fundamental role in molecular interactions within cell membranes modifying membrane bending, budding, fission and fusion. Here we tested the hypothesis that PAs are capable of direct transport of ions across bio-membranes. We have demonstrated that PAs added to the maize plasma membrane vesicles induced ionophore-like transmembrane transport of Ca2+, H+ and Mg2+. PA-induced Ca2+ fluxes increased with an increasing PAs acyl chain unsaturation. For all the PAs analysed, the effect on Ca2+ permeability increased with increasing pH (pH 8.0>pH 7.2>pH 6.0). The PA-induced Ca2+, Mg2+ and H+ permeability was also more pronounced in the endomembrane vesicles as compared with the plasma membrane vesicles. Addition of PA to protoplasts from Arabidopsis thaliana (L.) Heynh. roots constitutively expressing aequorin triggered elevation of the cytosolic Ca2+ activity, indicating that the observed PA-dependent Ca2+ transport occurs in intact plants.
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Affiliation(s)
- Sergei Medvedev
- Department of Plant Physiology and Biochemistry, St Petersburg State University, Universitetskaya em. 7-9, 199034, St Petersburg, Russia; and Corresponding authors. Emails: ;
| | - Olga Voronina
- Department of Plant Physiology and Biochemistry, St Petersburg State University, Universitetskaya em. 7-9, 199034, St Petersburg, Russia
| | - Olga Tankelyun
- Department of Plant Physiology and Biochemistry, St Petersburg State University, Universitetskaya em. 7-9, 199034, St Petersburg, Russia
| | - Tatiana Bilova
- Department of Plant Physiology and Biochemistry, St Petersburg State University, Universitetskaya em. 7-9, 199034, St Petersburg, Russia
| | - Dmitry Suslov
- Department of Plant Physiology and Biochemistry, St Petersburg State University, Universitetskaya em. 7-9, 199034, St Petersburg, Russia
| | - Mikhail Bankin
- Department of Plant Physiology and Biochemistry, St Petersburg State University, Universitetskaya em. 7-9, 199034, St Petersburg, Russia
| | - Viera Mackievic
- Department of Plant Cell Biology and Bioengineering, Biological Faculty, Belarusian State University, 4 Independence Avenue, Minsk, 220030, Belarus
| | - Maryia Makavitskaya
- Department of Plant Cell Biology and Bioengineering, Biological Faculty, Belarusian State University, 4 Independence Avenue, Minsk, 220030, Belarus
| | - Maria Shishova
- Department of Plant Physiology and Biochemistry, St Petersburg State University, Universitetskaya em. 7-9, 199034, St Petersburg, Russia
| | - Jan Martinec
- Institute of Experimental Botany AS CR, vvi, Rozvojová 263, 165 02 Prague 6 - Lysolaje, Czech Republic
| | - Galina Smolikova
- Department of Plant Physiology and Biochemistry, St Petersburg State University, Universitetskaya em. 7-9, 199034, St Petersburg, Russia
| | - Elena Sharova
- Department of Plant Physiology and Biochemistry, St Petersburg State University, Universitetskaya em. 7-9, 199034, St Petersburg, Russia
| | - Vadim Demidchik
- Department of Plant Cell Biology and Bioengineering, Biological Faculty, Belarusian State University, 4 Independence Avenue, Minsk, 220030, Belarus; and Corresponding authors. Emails: ;
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189
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Johnson MA, Harper JF, Palanivelu R. A Fruitful Journey: Pollen Tube Navigation from Germination to Fertilization. ANNUAL REVIEW OF PLANT BIOLOGY 2019; 70:809-837. [PMID: 30822112 DOI: 10.1146/annurev-arplant-050718-100133] [Citation(s) in RCA: 134] [Impact Index Per Article: 26.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
In flowering plants, pollen tubes undergo tip growth to deliver two nonmotile sperm to the ovule where they fuse with an egg and central cell to achieve double fertilization. This extended journey involves rapid growth and changes in gene activity that manage compatible interactions with at least seven different cell types. Nearly half of the genome is expressed in haploid pollen, which facilitates genetic analysis, even of essential genes. These unique attributes make pollen an ideal system with which to study plant cell-cell interactions, tip growth, cell migration, the modulation of cell wall integrity, and gene expression networks. We highlight the signaling systems required for pollen tube navigation and the potential roles of Ca2+ signals. The dynamics of pollen development make sexual reproduction highly sensitive to heat stress. Understanding this vulnerability may generate strategies to improve seed crop yields that are under threat from climate change.
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Affiliation(s)
- Mark A Johnson
- Department of Molecular Biology, Cell Biology, and Biochemistry, Brown University, Providence, Rhode Island 02912, USA;
| | - Jeffrey F Harper
- Department of Biochemistry and Molecular Biology, University of Nevada, Reno, Nevada 89557, USA;
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190
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Qian D, Xiang Y. Actin Cytoskeleton as Actor in Upstream and Downstream of Calcium Signaling in Plant Cells. Int J Mol Sci 2019; 20:ijms20061403. [PMID: 30897737 PMCID: PMC6471457 DOI: 10.3390/ijms20061403] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Revised: 03/14/2019] [Accepted: 03/15/2019] [Indexed: 01/04/2023] Open
Abstract
In plant cells, calcium (Ca2+) serves as a versatile intracellular messenger, participating in several fundamental and important biological processes. Recent studies have shown that the actin cytoskeleton is not only an upstream regulator of Ca2+ signaling, but also a downstream regulator. Ca2+ has been shown to regulates actin dynamics and rearrangements via different mechanisms in plants, and on this basis, the upstream signaling encoded within the Ca2+ transient can be decoded. Moreover, actin dynamics have also been proposed to act as an upstream of Ca2+, adjust Ca2+ oscillations, and establish cytosolic Ca2+ ([Ca2+]cyt) gradients in plant cells. In the current review, we focus on the advances in uncovering the relationship between the actin cytoskeleton and calcium in plant cells and summarize our current understanding of this relationship.
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Affiliation(s)
- Dong Qian
- MOE Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou 730000, China.
| | - Yun Xiang
- MOE Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou 730000, China.
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191
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Spatial and Temporal Calcium Signaling and Its Physiological Effects in Moso Bamboo under Drought Stress. FORESTS 2019. [DOI: 10.3390/f10030224] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Elevations in cytosolic free calcium concentration constitute a fundamental signal transduction mechanism in plants; however, the particular characteristics of calcium ion (Ca2+) signal occurrence in plants is still under debate. Little is known about how stimulus-specific Ca2+ signal fluctuations are generated. Therefore, we investigated the identity of the Ca2+ signal generation pathways, influencing factors, and the effects of the signaling network under drought stress on Phyllostachys edulis (Carrière) J. Houz. Non-invasive micro testing and laser confocal microscopy technology were used as platforms to detect and record Ca2+ signaling in live root tip and leaf cells of P. edulis under drought stress. We found that Ca2+ signal intensity (absorption capacity) positively correlated with degree of drought stress in the P. edulis shoots, and that Ca2+ signals in different parts of the root tip of P. edulis were different when emitted in response to drought stress. This difference was reflected in the Ca2+ flux and in regional distribution of Ca2+. Extracellular Ca2+ transport requires the involvement of the plasma membrane Ca2+ channels, while abscisic acid (ABA) can activate the plasma membrane Ca2+ channels. Additionally, Ca2+ acted as the upstream signal of H2O2 in the signaling network of P. edulis under drought stress. Ca2+ was also involved in the signal transduction process of ABA, and ABA can promote the production of Ca2+ signals in P. edulis leaves. Our findings revealed the physiological role of Ca2+ in drought resistance of P. edulis. This study establishes a theoretical foundation for research on the response to Ca2+ signaling in P. edulis.
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192
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Liu Y, Yu Y, Sun J, Cao Q, Tang Z, Liu M, Xu T, Ma D, Li Z, Sun J. Root-zone-specific sensitivity of K+-and Ca2+-permeable channels to H2O2 determines ion homeostasis in salinized diploid and hexaploid Ipomoea trifida. JOURNAL OF EXPERIMENTAL BOTANY 2019; 70:1389-1405. [PMID: 30689932 PMCID: PMC6382330 DOI: 10.1093/jxb/ery461] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2018] [Revised: 12/11/2018] [Accepted: 12/19/2018] [Indexed: 05/13/2023]
Abstract
Polyploids generally possess superior K+/Na+ homeostasis under saline conditions compared with their diploid progenitors. In this study, we identified the physiological mechanisms involved in the ploidy-related mediation of K+/Na+ homeostasis in the roots of diploid (2x) and hexaploid (6x; autohexaploid) Ipomoea trifida, which is the closest relative of cultivated sweet potato. Results showed that 6x I. trifida retained more K+ and accumulated less Na+ in the root and leaf tissues under salt stress than 2x I. trifida. Compared with its 2x ancestor, 6x I. trifida efficiently prevents K+ efflux from the meristem root zone under salt stress through its plasma membrane (PM) K+-permeable channels, which have low sensitivity to H2O2. Moreover, 6x I. trifida efficiently excludes Na+ from the elongation and mature root zones under salt stress because of the high sensitivity of PM Ca2+-permeable channels to H2O2. Our results suggest the root-zone-specific sensitivity to H2O2 of PM K+- and Ca2+-permeable channels in the co-ordinated control of K+/Na+ homeostasis in salinized 2x and 6x I. trifida. This work provides new insights into the improved maintenance of K+/Na+ homeostasis of polyploids under salt stress.
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Affiliation(s)
- Yang Liu
- Jiangsu Key Laboratory of Phylogenomics and Comparative Genomics, School of Life Sciences, Jiangsu Normal University, Xuzhou, Jiangsu, China
| | - Yicheng Yu
- Jiangsu Key Laboratory of Phylogenomics and Comparative Genomics, School of Life Sciences, Jiangsu Normal University, Xuzhou, Jiangsu, China
| | - Jianying Sun
- Jiangsu Key Laboratory of Phylogenomics and Comparative Genomics, School of Life Sciences, Jiangsu Normal University, Xuzhou, Jiangsu, China
| | - Qinghe Cao
- Sweet Potato Research Institute (CAAS), Jiangsu Xuzhou Sweet Potato Research Institute, MOA Key Laboratory of Biology and Genetic Improvement of Sweet Potato, Xuzhou, Jiangsu, China
| | - Zhonghou Tang
- Sweet Potato Research Institute (CAAS), Jiangsu Xuzhou Sweet Potato Research Institute, MOA Key Laboratory of Biology and Genetic Improvement of Sweet Potato, Xuzhou, Jiangsu, China
| | - Meiyan Liu
- Jiangsu Key Laboratory of Phylogenomics and Comparative Genomics, School of Life Sciences, Jiangsu Normal University, Xuzhou, Jiangsu, China
| | - Tao Xu
- Jiangsu Key Laboratory of Phylogenomics and Comparative Genomics, School of Life Sciences, Jiangsu Normal University, Xuzhou, Jiangsu, China
| | - Daifu Ma
- Sweet Potato Research Institute (CAAS), Jiangsu Xuzhou Sweet Potato Research Institute, MOA Key Laboratory of Biology and Genetic Improvement of Sweet Potato, Xuzhou, Jiangsu, China
| | - Zongyun Li
- Jiangsu Key Laboratory of Phylogenomics and Comparative Genomics, School of Life Sciences, Jiangsu Normal University, Xuzhou, Jiangsu, China
- Correspondence: or
| | - Jian Sun
- Jiangsu Key Laboratory of Phylogenomics and Comparative Genomics, School of Life Sciences, Jiangsu Normal University, Xuzhou, Jiangsu, China
- Correspondence: or
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193
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Shabala S. Linking ploidy level with salinity tolerance: NADPH-dependent 'ROS-Ca2+ hub' in the spotlight. JOURNAL OF EXPERIMENTAL BOTANY 2019; 70:1063-1067. [PMID: 31222353 PMCID: PMC6382325 DOI: 10.1093/jxb/erz042] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Affiliation(s)
- Sergey Shabala
- International Centre for Environmental Membrane Biology, Foshan University, Foshan, China
- Tasmanian Institute of Agriculture, University of Tasmania, Hobart, Australia
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Isayenkov SV, Maathuis FJM. Plant Salinity Stress: Many Unanswered Questions Remain. FRONTIERS IN PLANT SCIENCE 2019; 10:80. [PMID: 30828339 PMCID: PMC6384275 DOI: 10.3389/fpls.2019.00080] [Citation(s) in RCA: 390] [Impact Index Per Article: 78.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2018] [Accepted: 01/18/2019] [Indexed: 05/19/2023]
Abstract
Salinity is a major threat to modern agriculture causing inhibition and impairment of crop growth and development. Here, we not only review recent advances in salinity stress research in plants but also revisit some basic perennial questions that still remain unanswered. In this review, we analyze the physiological, biochemical, and molecular aspects of Na+ and Cl- uptake, sequestration, and transport associated with salinity. We discuss the role and importance of symplastic versus apoplastic pathways for ion uptake and critically evaluate the role of different types of membrane transporters in Na+ and Cl- uptake and intercellular and intracellular ion distribution. Our incomplete knowledge regarding possible mechanisms of salinity sensing by plants is evaluated. Furthermore, a critical evaluation of the mechanisms of ion toxicity leads us to believe that, in contrast to currently held ideas, toxicity only plays a minor role in the cytosol and may be more prevalent in the vacuole. Lastly, the multiple roles of K+ in plant salinity stress are discussed.
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Affiliation(s)
- Stanislav V. Isayenkov
- Department of Plant Food Products and Biofortification, Institute of Food Biotechnology and Genomics NAS of Ukraine, Kyiv, Ukraine
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195
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Cui D, Yin Y, Wang J, Wang Z, Ding H, Ma R, Jiao Z. Research on the Physio-Biochemical Mechanism of Non-Thermal Plasma-Regulated Seed Germination and Early Seedling Development in Arabidopsis. FRONTIERS IN PLANT SCIENCE 2019; 10:1322. [PMID: 31781132 PMCID: PMC6857620 DOI: 10.3389/fpls.2019.01322] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2019] [Accepted: 09/23/2019] [Indexed: 05/12/2023]
Abstract
Non-thermal plasma holds great potentials as an efficient, economical, and eco-friendly seed pretreatment method for improving the seed germination and seedling growth, but the mechanisms are still unclear. Therefore, a plant model organism Arabidopsis thaliana was used to investigate the physio-biochemical responses of seeds to non-thermal plasma at different treatment times by measuring the plant growth parameters, redox-related parameters, calcium (Ca2+) level and physicochemical modification of seed surface. The results showed that short-time plasma treatment (0.5, 1, and 3 min) promoted seed germination and seedling growth, whereas long-time plasma treatment (5 and 10 min) exhibited inhibitory effects. The level of superoxide anion (O2 •-) and nitric oxide (NO) and the intensity of infrared absorption of the hydroxyl group were significantly higher in short-time plasma treated Arabidopsis seeds, and the level of hydrogen peroxide (H2O2) was remarkably increased in long-time plasma treated seeds, indicating that O2 •-, ·OH, and NO induced by plasma may contribute to breaking seed dormancy and advancing seed germination in Arabidopsis, while plasma-induced H2O2 may inhibit the seed germination. The intensity of hydroxyl group and the contents of H2O2, malondialdehyde, and Ca2+ in Arabidopsis seedlings were obviously increased with the plasma treatment time. Catalase, superoxide dismutase, and peroxidase activities as well as proline level in short-time treated seedlings were apparently higher than in control. The etching effects of plasma on seed surface were dose-dependent, spanning from slight shrinkages to detached epidermis, which also significantly increased the oxidation degree of seed surface. Therefore, the improved activities of antioxidant systems, moderate ·OH, H2O2, and Ca2+ accumulation and seed surface modification induced by plasma all contribute to the enhanced seedling growth of Arabidopsis after short-time plasma treatment.
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Affiliation(s)
- Dongjie Cui
- Henan Key Laboratory of Ion-Beam Bioengineering, College of Agricultural, Zhengzhou University, Zhengzhou, China
| | - Yue Yin
- Henan Key Laboratory of Ion-Beam Bioengineering, College of Agricultural, Zhengzhou University, Zhengzhou, China
| | - Jiaqi Wang
- Henan Key Laboratory of Ion-Beam Bioengineering, College of Agricultural, Zhengzhou University, Zhengzhou, China
| | - Zhiwei Wang
- School of Physics, Key Laboratory of Materials Modification by Laser, Ion and Electron Beams, Ministry of Education, Dalian University of Technology, Dalian, China
| | - Hongbin Ding
- School of Physics, Key Laboratory of Materials Modification by Laser, Ion and Electron Beams, Ministry of Education, Dalian University of Technology, Dalian, China
| | - Ruonan Ma
- Henan Key Laboratory of Ion-Beam Bioengineering, College of Agricultural, Zhengzhou University, Zhengzhou, China
- *Correspondence: Ruonan Ma, ; Zhen Jiao,
| | - Zhen Jiao
- Henan Key Laboratory of Ion-Beam Bioengineering, College of Agricultural, Zhengzhou University, Zhengzhou, China
- *Correspondence: Ruonan Ma, ; Zhen Jiao,
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196
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Bahmani R, Kim D, Na J, Hwang S. Expression of the Tobacco Non-symbiotic Class 1 Hemoglobin Gene Hb1 Reduces Cadmium Levels by Modulating Cd Transporter Expression Through Decreasing Nitric Oxide and ROS Level in Arabidopsis. FRONTIERS IN PLANT SCIENCE 2019; 10:201. [PMID: 30853969 PMCID: PMC6396062 DOI: 10.3389/fpls.2019.00201] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2018] [Accepted: 02/06/2019] [Indexed: 05/03/2023]
Abstract
Hemoglobin (Hb) proteins are ubiquitous in plants, and non-symbiotic class 1 hemoglobin (Hb1) is involved in various biotic and abiotic stress responses. Here, the expression of the tobacco (Nicotiana tabacum) hemoglobin gene NtHb1 in Arabidopsis (Arabidopsis thaliana) showed higher cadmium (Cd) tolerance and lower accumulations of Cd, nitric oxide (NO), and reactive oxygen species (ROS) like hydrogen peroxide (H2O2). NtHb1-expressing Arabidopsis exhibited a reduced induction of NO levels in response to Cd, suggesting scavenging of NO by Hb1. In addition, transgenic plants had reduced accumulation of ROS and increased activities of antioxidative enzymes (catalase, superoxide dismutase, and glutathione reductase) in response to Cd. While the expression of the Cd exporters ABC transporter (PDR8) and Ca2+/H+ exchangers (CAXs) was increased, that of the Cd importers iron responsive transporter 1 (IRT1) and P-type 2B Ca2+ ATPase (ACA10) was reduced in response to Cd. When Col-0 plants were treated with the NO donor sodium nitroprusside (SNP) and H2O2, the expression pattern of Cd transporters (PDR8, CAX3, IRT1, and ACA10) was reversed, suggesting that NtHb1 expression decreased the Cd level by regulating the expression of Cd transporters via decreased NO and ROS. Correspondingly, NtHb1-expressing Arabidopsis showed increased Cd export. In summary, the expression of NtHb1 reduces Cd levels by regulating Cd transporter expression via decreased NO and ROS levels in Arabidopsis.
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Affiliation(s)
- Ramin Bahmani
- Department of Molecular Biology, Sejong University, Seoul, South Korea
- Department of Bioindustry and Bioresource Engineering, Sejong University, Seoul, South Korea
- Plant Engineering Research Institute, Sejong University, Seoul, South Korea
| | - DongGwan Kim
- Department of Molecular Biology, Sejong University, Seoul, South Korea
- Department of Bioindustry and Bioresource Engineering, Sejong University, Seoul, South Korea
- Plant Engineering Research Institute, Sejong University, Seoul, South Korea
| | - JongDuk Na
- Department of Molecular Biology, Sejong University, Seoul, South Korea
| | - Seongbin Hwang
- Department of Molecular Biology, Sejong University, Seoul, South Korea
- Department of Bioindustry and Bioresource Engineering, Sejong University, Seoul, South Korea
- Plant Engineering Research Institute, Sejong University, Seoul, South Korea
- *Correspondence: Seongbin Hwang,
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197
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Long-distance electrical signals as a link between the local action of stressors and the systemic physiological responses in higher plants. PROGRESS IN BIOPHYSICS AND MOLECULAR BIOLOGY 2018; 146:63-84. [PMID: 30508537 DOI: 10.1016/j.pbiomolbio.2018.11.009] [Citation(s) in RCA: 56] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2018] [Revised: 11/23/2018] [Accepted: 11/24/2018] [Indexed: 12/27/2022]
Abstract
Our review is devoted to the analysis of the role of long-distance electrical signals in the development of the fast systemic physiological responses in higher plants. The characteristics and mechanisms of basic electrical signals (variation potential, action potential and system potential) are analyzed, and a potential schema of the generation and propagation of the system potential is proposed. The review summarizes the physiological changes induced by the variation potential, action potential and system potential in higher plants, including changes in gene expressions, the production of phytohormones, photosynthesis, phloem mass-flow, respiration, ATP content, transpiration and plant growth. Potential mechanisms of the changes are analyzed. Finally, a hypothetical schema, which describes a hierarchy of the variation potential, action potential and system potential, in the development of the fast systemic non-specific adaptation of plants to stressors, is proposed.
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198
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Moscatiello R, Sello S, Ruocco M, Barbulova A, Cortese E, Nigris S, Baldan B, Chiurazzi M, Mariani P, Lorito M, Navazio L. The Hydrophobin HYTLO1 Secreted by the Biocontrol Fungus Trichoderma longibrachiatum Triggers a NAADP-Mediated Calcium Signalling Pathway in Lotus japonicus. Int J Mol Sci 2018; 19:E2596. [PMID: 30200468 PMCID: PMC6164116 DOI: 10.3390/ijms19092596] [Citation(s) in RCA: 20] [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: 07/30/2018] [Accepted: 08/29/2018] [Indexed: 12/14/2022] Open
Abstract
Trichoderma filamentous fungi are increasingly used as biocontrol agents and plant biostimulants. Growing evidence indicates that part of the beneficial effects is mediated by the activity of fungal metabolites on the plant host. We have investigated the mechanism of plant perception of HYTLO1, a hydrophobin abundantly secreted by Trichoderma longibrachiatum, which may play an important role in the early stages of the plant-fungus interaction. Aequorin-expressing Lotus japonicus suspension cell cultures responded to HYTLO1 with a rapid cytosolic Ca2+ increase that dissipated within 30 min, followed by the activation of the defence-related genes MPK3, WRK33, and CP450. The Ca2+-dependence of these gene expression was demonstrated by using the extracellular Ca2+ chelator EGTA and Ned-19, a potent inhibitor of the nicotinic acid adenine dinucleotide phosphate (NAADP) receptor in animal cells, which effectively blocked the HYTLO1-induced Ca2+ elevation. Immunocytochemical analyses showed the localization of the fungal hydrophobin at the plant cell surface, where it forms a protein film covering the plant cell wall. Our data demonstrate the Ca2+-mediated perception by plant cells of a key metabolite secreted by a biocontrol fungus, and provide the first evidence of the involvement of NAADP-gated Ca2+ release in a signalling pathway triggered by a biotic stimulus.
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Affiliation(s)
- Roberto Moscatiello
- Department of Biology, University of Padova, Via U. Bassi 58/B, 35131 Padova, Italy.
| | - Simone Sello
- Department of Biology, University of Padova, Via U. Bassi 58/B, 35131 Padova, Italy.
| | - Michelina Ruocco
- Institute for Sustainable Plant Protection, CNR, Via Università 133, 80055 Portici (NA), Italy.
| | - Ani Barbulova
- Institute of BioSciences and BioResourses, CNR, Via P. Castellino 111, 80131 Napoli, Italy.
| | - Enrico Cortese
- Department of Biology, University of Padova, Via U. Bassi 58/B, 35131 Padova, Italy.
| | - Sebastiano Nigris
- Botanical Garden, University of Padova, Via Orto Botanico 15, 35123 Padova, Italy.
| | - Barbara Baldan
- Department of Biology, University of Padova, Via U. Bassi 58/B, 35131 Padova, Italy.
- Botanical Garden, University of Padova, Via Orto Botanico 15, 35123 Padova, Italy.
| | - Maurizio Chiurazzi
- Institute of BioSciences and BioResourses, CNR, Via P. Castellino 111, 80131 Napoli, Italy.
| | - Paola Mariani
- Department of Biology, University of Padova, Via U. Bassi 58/B, 35131 Padova, Italy.
| | - Matteo Lorito
- Department of Agricultural Sciences, University of Napoli "Federico II", Via Università 100, 80055 Portici (NA), Italy.
| | - Lorella Navazio
- Department of Biology, University of Padova, Via U. Bassi 58/B, 35131 Padova, Italy.
- Botanical Garden, University of Padova, Via Orto Botanico 15, 35123 Padova, Italy.
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