401
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Lourenço TF, Serra TS, Cordeiro AM, Swanson SJ, Gilroy S, Saibo NJM, Oliveira MM. Rice root curling, a response to mechanosensing, is modulated by the rice E3-ubiquitin ligase HIGH EXPRESSION OF OSMOTICALLY RESPONSIVE GENE1 (OsHOS1). PLANT SIGNALING & BEHAVIOR 2016; 11:e1208880. [PMID: 27467198 PMCID: PMC5022415 DOI: 10.1080/15592324.2016.1208880] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2016] [Accepted: 06/29/2016] [Indexed: 06/06/2023]
Abstract
Plant development depends on the perception of external cues, such as light, gravity, touch, wind or nutrients, among others. Nevertheless, little is known regarding signal transduction pathways integrating these stimuli. Recently, we have reported the involvement of a rice E3-ubiquitin ligase (OsHOS1, HIGH EXPRESSION OF OSMOTICALLY RESPONSIVE GENE1), previously associated with abiotic stress response, in root responses to mechanical stimuli. We showed that OsHOS1 is involved in the regulation of root curling after mechanosensing and that RNAi::OsHOS1 plants failed to exhibit the root curling phenotype observed in WT. Interestingly, the straight root phenotype of these transgenics correlated with the up-regulation of rice ROOT MEANDER CURLING (OsRMC, a negative regulator of rice root curling) and was reverted by the exogenous application of jasmonic acid. Altogether, our results highlight the role of the proteasome modulating plant responses to mechanical stimuli and suggest that OsHOS1 is a hub integrating environmental and hormonal signaling into plant growth and development.
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Affiliation(s)
- T. F. Lourenço
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Genomics of Plant Stress, Oeiras, Portugal
- iBET, Instituto de Biologia Experimental e Tecnológica, Oeiras, Portugal
| | - T. S. Serra
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Genomics of Plant Stress, Oeiras, Portugal
- iBET, Instituto de Biologia Experimental e Tecnológica, Oeiras, Portugal
| | - A. M. Cordeiro
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Genomics of Plant Stress, Oeiras, Portugal
- iBET, Instituto de Biologia Experimental e Tecnológica, Oeiras, Portugal
| | - S. J. Swanson
- Department of Botany, University of Wisconsin, Madison, WI, USA
| | - S. Gilroy
- Department of Botany, University of Wisconsin, Madison, WI, USA
| | - N. J. M. Saibo
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Genomics of Plant Stress, Oeiras, Portugal
- iBET, Instituto de Biologia Experimental e Tecnológica, Oeiras, Portugal
| | - M. M. Oliveira
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Genomics of Plant Stress, Oeiras, Portugal
- iBET, Instituto de Biologia Experimental e Tecnológica, Oeiras, Portugal
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402
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Nongpiur RC, Singla-Pareek SL, Pareek A. Genomics Approaches For Improving Salinity Stress Tolerance in Crop Plants. Curr Genomics 2016; 17:343-57. [PMID: 27499683 PMCID: PMC4955028 DOI: 10.2174/1389202917666160331202517] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2015] [Revised: 07/28/2015] [Accepted: 08/04/2015] [Indexed: 11/22/2022] Open
Abstract
Salinity is one of the major factors which reduces crop production worldwide. Plant responses to salinity are highly complex and involve a plethora of genes. Due to its multigenicity, it has been difficult to attain a complete understanding of how plants respond to salinity. Genomics has progressed tremendously over the past decade and has played a crucial role towards providing necessary knowledge for crop improvement. Through genomics, we have been able to identify and characterize the genes involved in salinity stress response, map out signaling pathways and ultimately utilize this information for improving the salinity tolerance of existing crops. The use of new tools, such as gene pyramiding, in genetic engineering and marker assisted breeding has tremendously enhanced our ability to generate stress tolerant crops. Genome editing technologies such as Zinc finger nucleases, TALENs and CRISPR/Cas9 also provide newer and faster avenues for plant biologists to generate precisely engineered crops.
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Affiliation(s)
- Ramsong Chantre Nongpiur
- Stress Physiology and Molecular Biology Laboratory, School of Life Sciences, Jawaharlal Nehru University, New Delhi 110067,India
| | - Sneh Lata Singla-Pareek
- Plant Molecular Biology, International Centre for Genetic Engineering and Biotechnology, Aruna Asaf Ali Road, New Delhi 110067,India
| | - Ashwani Pareek
- Stress Physiology and Molecular Biology Laboratory, School of Life Sciences, Jawaharlal Nehru University, New Delhi 110067,India
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403
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Verslues PE. ABA and cytokinins: challenge and opportunity for plant stress research. PLANT MOLECULAR BIOLOGY 2016; 91:629-640. [PMID: 26910054 DOI: 10.1007/s11103-016-0458-7] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2015] [Accepted: 02/19/2016] [Indexed: 06/05/2023]
Abstract
Accumulation of the stress hormone abscisic acid (ABA) induces many cellular mechanisms associated with drought resistance. Recent years have seen a rapid advance in our knowledge of how increased ABA levels are perceived by ABA receptors, particularly the PYL/RCAR receptors, but there has been relatively less new information about how ABA accumulation is controlled and matched to stress severity. ABA synthesis and catabolism, conjugation and deconjugation to glucose, and ABA transport all are involved in controlling ABA levels. This highly buffered system of ABA metabolism represents both a challenge and opportunity in developing a mechanistic understanding of how plants detect and respond to drought. Recent data have also shown that direct manipulation of cytokinin levels in transgenic plants has dramatic effect on drought phenotypes and prompted new interest in the role of cytokinins and cytokinin signaling in drought. Both ABA and cytokinins will continue to be major foci of drought research but likely with different trajectories both in terms of basic research and in translational research aimed at increasing plant performance during drought.
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Affiliation(s)
- Paul E Verslues
- Institute of Plant and Microbial Biology, Academia Sinica, No. 128 Sec. 2 Academia Rd, Nankang Dist., Taipei, 11529, Taiwan.
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404
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Li M, Li Y, Zhao J, Liu H, Jia S, Li J, Zhao H, Han S, Wang Y. GpDSR7, a Novel E3 Ubiquitin Ligase Gene in Grimmia pilifera Is Involved in Tolerance to Drought Stress in Arabidopsis. PLoS One 2016; 11:e0155455. [PMID: 27228205 PMCID: PMC4882056 DOI: 10.1371/journal.pone.0155455] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2016] [Accepted: 04/28/2016] [Indexed: 11/18/2022] Open
Abstract
The growth and development of plants under drought stress depends mainly on the expression levels of various genes and modification of proteins. To clarify the molecular mechanism of drought-tolerance of plants, suppression subtractive hybridisation cDNA libraries were screened to identify drought-stress-responsive unigenes in Grimmia pilifera, and a novel E3 ubiquitin ligase gene, GpDSR7, was identified among the 240 responsive unigenes. GpDSR7 expression was induced by various abiotic stresses, particularly by drought. GpDSR7 displayed E3 ubiquitin ligase activity in vitro and was exclusively localised on the ER membrane in Arabidopsis mesophyll protoplasts. GpDSR7-overexpressing transgenic Arabidopsis plants showed a high water content and survival ratio under drought stress. Moreover, the expression levels of some marker genes involved in drought stress were higher in the transgenic plants than in wild-type plants. These results suggest that GpDSR7, an E3 ubiquitin ligase, is involved in tolerance to drought stress at the protein modification level.
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Affiliation(s)
- Mengmeng Li
- Beijing Key Laboratory of Gene Resource and Molecular Development, College of Life Sciences, Beijing Normal University, Beijing, China
| | - Yihao Li
- Beijing Key Laboratory of Gene Resource and Molecular Development, College of Life Sciences, Beijing Normal University, Beijing, China
| | - Junyi Zhao
- Beijing Key Laboratory of Gene Resource and Molecular Development, College of Life Sciences, Beijing Normal University, Beijing, China
| | - Hai Liu
- Beijing Key Laboratory of Gene Resource and Molecular Development, College of Life Sciences, Beijing Normal University, Beijing, China
| | - Shenghua Jia
- Beijing Key Laboratory of Gene Resource and Molecular Development, College of Life Sciences, Beijing Normal University, Beijing, China
| | - Jie Li
- Beijing Key Laboratory of Gene Resource and Molecular Development, College of Life Sciences, Beijing Normal University, Beijing, China
| | - Heping Zhao
- Beijing Key Laboratory of Gene Resource and Molecular Development, College of Life Sciences, Beijing Normal University, Beijing, China
| | - Shengcheng Han
- Beijing Key Laboratory of Gene Resource and Molecular Development, College of Life Sciences, Beijing Normal University, Beijing, China
| | - Yingdian Wang
- Beijing Key Laboratory of Gene Resource and Molecular Development, College of Life Sciences, Beijing Normal University, Beijing, China
- * E-mail:
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405
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Zheng L, Mackrill JJ. Calcium Signaling in Oomycetes: An Evolutionary Perspective. Front Physiol 2016; 7:123. [PMID: 27092083 PMCID: PMC4820453 DOI: 10.3389/fphys.2016.00123] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2015] [Accepted: 03/21/2016] [Indexed: 01/06/2023] Open
Abstract
Oomycetes are a family of eukaryotic microbes that superficially resemble fungi, but which are phylogenetically distinct from them. These organisms cause major global economic losses to agriculture and fisheries, with representative pathogens being Phytophthora infestans, the cause of late potato blight and Saprolegnia diclina, the instigator of “cotton molds” in fish. As in all eukaryotes, cytoplasmic Ca2+ is a key second messenger in oomycetes, regulating life-cycle transitions, controlling motility and chemotaxis and, in excess, leading to cell-death. Despite this, little is known about the molecular mechanisms regulating cytoplasmic Ca2+ concentrations in these organisms. Consequently, this review analyzed the presence of candidate calcium channels encoded within the nine oomycete genomes that are currently available. This revealed key differences between oomycetes and other eukaryotes, in particular the expansion and loss of different channel families, and the presence of a phylum-specific group of proteins, termed the polycystic kidney disease tandem ryanodine receptor domain (PKDRR) channels.
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Affiliation(s)
- Limian Zheng
- Department of Physiology, BioSciences Institute, University College Cork Cork, Ireland
| | - John J Mackrill
- Department of Physiology, BioSciences Institute, University College Cork Cork, Ireland
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406
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Zhao X, Yan X, Liu Y, Zhang P, Ni X. Co-expression of mouse TMEM63A, TMEM63B and TMEM63C confers hyperosmolarity activated ion currents in HEK293 cells. Cell Biochem Funct 2016; 34:238-41. [PMID: 27045885 DOI: 10.1002/cbf.3185] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2016] [Revised: 03/06/2016] [Accepted: 03/11/2016] [Indexed: 11/08/2022]
Abstract
Osmoreception is essential for systemic osmoregulation, a process to stabilize the tonicity and volume of the extracellular fluid through regulating the ingestive behaviour, sympathetic outflow and renal function. The sensation of osmotic changes by osmoreceptor neurons is mediated by ion channels that detect the change of osmolarity in extracellular fluid. However, the molecular identity of these channels remains mysterious. AtCSC1and OSCA1,two closely related paralogues from Arabidopsis, have been demonstrated to form hyperosmolarity activated ion channels, which makes their mammalian orthologues-the members of TMEM63 proteins, possible candidates for osmoreceptor transduction channel. To test this possibility, we cloned the cDNAs of all the three members of the mouse TMEM63 family, TMEM63A, TMEM63B and TMEM63C from the mRNA from mouse brain. When all of the three subtypes of TMEM63 proteins were co-expressed in HEK293 cells, we recorded membrane currents evoked by hypertonic stimulation in these cells. However, the cells expressing the combinations of any two subtypes of TMEM63 proteins could not exhibit any hyperosmolarity evoked currents. Thus, all the three members of TMEM63 proteins are required to constitute a hyperosmolarity activated ion channel. We propose that the TMEM63 proteins may serve as an osmolarity sensitive ion channel for the osmoreception. Copyright © 2016 John Wiley & Sons, Ltd.
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Affiliation(s)
- Xin Zhao
- Beijing Key Laboratory for Pediatric Diseases of Otolaryngology, Department of Anesthesiology, Beijing Pediatric Research Institute, Beijing Children's Hospital, Capital Medical University, Beijing, China
| | - Xiaojuan Yan
- Department of Otolaryngology, Head and Neck Surgery, Beijing Anzhen Hospital, Capital Medical University, Beijing, China
| | - Yuanhu Liu
- Beijing Key Laboratory for Pediatric Diseases of Otolaryngology, Head and Neck Surgery, Beijing Pediatric Research Institute, Beijing Children's Hospital, Capital Medical University, Beijing, China
| | - Ping Zhang
- Department of Otolaryngology, Head and Neck Surgery, Beijing Anzhen Hospital, Capital Medical University, Beijing, China
| | - Xin Ni
- Beijing Key Laboratory for Pediatric Diseases of Otolaryngology, Head and Neck Surgery, Beijing Pediatric Research Institute, Beijing Children's Hospital, Capital Medical University, Beijing, China
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407
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Voss LJ, Hedrich R, Roelfsema MRG. Current Injection Provokes Rapid Expansion of the Guard Cell Cytosolic Volume and Triggers Ca(2+) Signals. MOLECULAR PLANT 2016; 9:471-480. [PMID: 26902185 DOI: 10.1016/j.molp.2016.02.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2015] [Revised: 01/07/2016] [Accepted: 02/14/2016] [Indexed: 06/05/2023]
Abstract
High-resolution microscopy opens the door for detailed single-cell studies with fluorescent reporter dyes and proteins. We used a confocal spinning disc microscope to monitor fluorescent dyes and the fluorescent protein Venus in tobacco and Arabidopsis guard cells. Multi-barreled microelectrodes were used to inject dyes and apply voltage pulses, which provoke transient rises in the cytosolic Ca(2+) level. Voltage pulses also caused changes in the distribution of Lucifer Yellow and Venus, which pointed to a reversible increase of guard cell cytosolic volume. The dynamic cytosolic volume changes turned out to be provoked by current injection of ions. A reduction of the clamp current, by blocking K(+) uptake channels with Cs(+), strongly suppressed the cytosolic volume changes. Cs(+) not only inhibited the expansion of the cytosol, but also inhibited hyperpolarization-induced elevations of the cytosolic Ca(2+) concentration. A complete loss of voltage-induced Ca(2+) signals occurred when Ca(2+)-permeable plasma membrane channels were simultaneously blocked with La(3+). This shows that two mechanisms cause hyperpolarization-induced elevation of the cytosolic Ca(2+)-concentration: (i) activation of voltage-dependent Ca(2+)-permeable channels, (ii) osmotically induced expansion of the cytosol, which leads to a release of Ca(2+) from intracellular stores.
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Affiliation(s)
- Lena J Voss
- Molecular Plant Physiology and Biophysics, Julius-von-Sachs Institute for Biosciences, Biocenter, Würzburg University, Julius-von-Sachs-Platz 2, 97082 Würzburg, Germany
| | - Rainer Hedrich
- Molecular Plant Physiology and Biophysics, Julius-von-Sachs Institute for Biosciences, Biocenter, Würzburg University, Julius-von-Sachs-Platz 2, 97082 Würzburg, Germany
| | - M Rob G Roelfsema
- Molecular Plant Physiology and Biophysics, Julius-von-Sachs Institute for Biosciences, Biocenter, Würzburg University, Julius-von-Sachs-Platz 2, 97082 Würzburg, Germany.
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408
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Kleist TJ, Luan S. Constant change: dynamic regulation of membrane transport by calcium signalling networks keeps plants in tune with their environment. PLANT, CELL & ENVIRONMENT 2016; 39:467-481. [PMID: 26139029 DOI: 10.1111/pce.12599] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2015] [Revised: 05/20/2015] [Accepted: 05/21/2015] [Indexed: 06/04/2023]
Abstract
Despite substantial variation and irregularities in their environment, plants must conform to spatiotemporal demands on the molecular composition of their cytosol. Cell membranes are the major interface between organisms and their environment and the basis for controlling the contents and intracellular organization of the cell. Membrane transport proteins (MTPs) govern the flow of molecules across membranes, and their activities are closely monitored and regulated by cell signalling networks. By continuously adjusting MTP activities, plants can mitigate the effects of environmental perturbations, but effective implementation of this strategy is reliant on precise coordination among transport systems that reside in distinct cell types and membranes. Here, we examine the role of calcium signalling in the coordination of membrane transport, with an emphasis on potassium transport. Potassium is an exceptionally abundant and mobile ion in plants, and plant potassium transport has been intensively studied for decades. Classic and recent studies have underscored the importance of calcium in plant environmental responses and membrane transport regulation. In reviewing recent advances in our understanding of the coding and decoding of calcium signals, we highlight established and emerging roles of calcium signalling in coordinating membrane transport among multiple subcellular locations and distinct transport systems in plants, drawing examples from the CBL-CIPK signalling network. By synthesizing classical studies and recent findings, we aim to provide timely insights on the role of calcium signalling networks in the modulation of membrane transport and its importance in plant environmental responses.
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Affiliation(s)
- Thomas J Kleist
- University of California, Berkeley, Department of Plant & Microbial Biology, Berkeley, CA, 94720, USA
| | - Sheng Luan
- University of California, Berkeley, Department of Plant & Microbial Biology, Berkeley, CA, 94720, USA
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409
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Rai AN, Tamirisa S, Rao KV, Kumar V, Suprasanna P. Brassica RNA binding protein ERD4 is involved in conferring salt, drought tolerance and enhancing plant growth in Arabidopsis. PLANT MOLECULAR BIOLOGY 2016; 90:375-87. [PMID: 26711633 DOI: 10.1007/s11103-015-0423-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2015] [Accepted: 12/22/2015] [Indexed: 05/24/2023]
Abstract
'Early responsive to dehydration' (ERD) genes are a group of plant genes having functional roles in plant stress tolerance and development. In this study, we have isolated and characterized a Brassica juncea 'ERD' gene (BjERD4) which encodes a novel RNA binding protein. The expression pattern of ERD4 analyzed under different stress conditions showed that transcript levels were increased with dehydration, sodium chloride, low temperature, heat, abscisic acid and salicylic acid treatments. The BjERD4 was found to be localized in the chloroplasts as revealed by Confocal microscopy studies. To study the function, transgenic Arabidopsis plants were generated and analyzed for various morphological and physiological parameters. The overexpressing transgenic lines showed significant increase in number of leaves with more leaf area and larger siliques as compared to wild type plants, whereas RNAi:ERD4 transgenic lines showed reduced leaf number, leaf area, dwarf phenotype and delayed seed germination. Transgenic Arabidopsis plants overexpressing BjERD4 gene also exhibited enhanced tolerance to dehydration and salt stresses, while the knockdown lines were susceptible as compared to wild type plants under similar stress conditions. It was observed that BjERD4 protein could bind RNA as evidenced by the gel-shift assay. The overall results of transcript analysis, RNA gel-shift assay, and transgenic expression, for the first time, show that the BjERD4 is involved in abiotic stress tolerance besides offering new clues about the possible roles of BjERD4 in plant growth and development.
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Affiliation(s)
- Archana N Rai
- Plant Stress Physiology and Biotechnology Section, Nuclear Agriculture and Biotechnology Division, Bhabha Atomic Research Centre, Mumbai, 400085, India
| | - Srinath Tamirisa
- Centre for Plant Molecular Biology, Osmania University, Hyderabad, 500007, India
| | - K V Rao
- Centre for Plant Molecular Biology, Osmania University, Hyderabad, 500007, India
| | - Vinay Kumar
- Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai, 400085, India
| | - P Suprasanna
- Plant Stress Physiology and Biotechnology Section, Nuclear Agriculture and Biotechnology Division, Bhabha Atomic Research Centre, Mumbai, 400085, India.
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410
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Cyclic nucleotide-gated channel 18 is an essential Ca2+ channel in pollen tube tips for pollen tube guidance to ovules in Arabidopsis. Proc Natl Acad Sci U S A 2016; 113:3096-101. [PMID: 26929345 DOI: 10.1073/pnas.1524629113] [Citation(s) in RCA: 116] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
In flowering plants, pollen tubes are guided into ovules by multiple attractants from female gametophytes to release paired sperm cells for double fertilization. It has been well-established that Ca(2+) gradients in the pollen tube tips are essential for pollen tube guidance and that plasma membrane Ca(2+) channels in pollen tube tips are core components that regulate Ca(2+) gradients by mediating and regulating external Ca(2+) influx. Therefore, Ca(2+) channels are the core components for pollen tube guidance. However, there is still no genetic evidence for the identification of the putative Ca(2+) channels essential for pollen tube guidance. Here, we report that the point mutations R491Q or R578K in cyclic nucleotide-gated channel 18 (CNGC18) resulted in abnormal Ca(2+) gradients and strong pollen tube guidance defects by impairing the activation of CNGC18 in Arabidopsis. The pollen tube guidance defects of cngc18-17 (R491Q) and of the transfer DNA (T-DNA) insertion mutant cngc18-1 (+/-) were completely rescued by CNGC18. Furthermore, domain-swapping experiments showed that CNGC18's transmembrane domains are indispensable for pollen tube guidance. Additionally, we found that, among eight Ca(2+) channels (including six CNGCs and two glutamate receptor-like channels), CNGC18 was the only one essential for pollen tube guidance. Thus, CNGC18 is the long-sought essential Ca(2+) channel for pollen tube guidance in Arabidopsis.
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411
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Damiani I, Drain A, Guichard M, Balzergue S, Boscari A, Boyer JC, Brunaud V, Cottaz S, Rancurel C, Da Rocha M, Fizames C, Fort S, Gaillard I, Maillol V, Danchin EGJ, Rouached H, Samain E, Su YH, Thouin J, Touraine B, Puppo A, Frachisse JM, Pauly N, Sentenac H. Nod Factor Effects on Root Hair-Specific Transcriptome of Medicago truncatula: Focus on Plasma Membrane Transport Systems and Reactive Oxygen Species Networks. FRONTIERS IN PLANT SCIENCE 2016; 7:794. [PMID: 27375649 PMCID: PMC4894911 DOI: 10.3389/fpls.2016.00794] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2016] [Accepted: 05/22/2016] [Indexed: 05/18/2023]
Abstract
Root hairs are involved in water and nutrient uptake, and thereby in plant autotrophy. In legumes, they also play a crucial role in establishment of rhizobial symbiosis. To obtain a holistic view of Medicago truncatula genes expressed in root hairs and of their regulation during the first hours of the engagement in rhizobial symbiotic interaction, a high throughput RNA sequencing on isolated root hairs from roots challenged or not with lipochitooligosaccharides Nod factors (NF) for 4 or 20 h was carried out. This provided a repertoire of genes displaying expression in root hairs, responding or not to NF, and specific or not to legumes. In analyzing the transcriptome dataset, special attention was paid to pumps, transporters, or channels active at the plasma membrane, to other proteins likely to play a role in nutrient ion uptake, NF electrical and calcium signaling, control of the redox status or the dynamic reprogramming of root hair transcriptome induced by NF treatment, and to the identification of papilionoid legume-specific genes expressed in root hairs. About 10% of the root hair expressed genes were significantly up- or down-regulated by NF treatment, suggesting their involvement in remodeling plant functions to allow establishment of the symbiotic relationship. For instance, NF-induced changes in expression of genes encoding plasma membrane transport systems or disease response proteins indicate that root hairs reduce their involvement in nutrient ion absorption and adapt their immune system in order to engage in the symbiotic interaction. It also appears that the redox status of root hair cells is tuned in response to NF perception. In addition, 1176 genes that could be considered as "papilionoid legume-specific" were identified in the M. truncatula root hair transcriptome, from which 141 were found to possess an ortholog in every of the six legume genomes that we considered, suggesting their involvement in essential functions specific to legumes. This transcriptome provides a valuable resource to investigate root hair biology in legumes and the roles that these cells play in rhizobial symbiosis establishment. These results could also contribute to the long-term objective of transferring this symbiotic capacity to non-legume plants.
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Affiliation(s)
- Isabelle Damiani
- Centre National de la Recherche Scientifique, Institut National de la Recherche Agronomique, UMR 1355-7254 Institut Sophia Agrobiotech, Université Nice Sophia AntipolisSophia Antipolis, France
| | - Alice Drain
- Biochimie and Physiologie Moléculaire des Plantes, UMR 5004 Centre National de la Recherche Scientifique/386 Institut National de la Recherche Agronomique/SupAgro Montpellier/Université de Montpellier, Campus SupAgro-Institut National de la Recherche AgronomiqueMontpellier, France
| | - Marjorie Guichard
- Institute for Integrative Biology of the Cell, CEA, Centre National de la Recherche Scientifique, Université Paris-Sud, Université Paris-SaclayGif sur Yvette, France
| | - Sandrine Balzergue
- POPS Transcriptomic Platform, Centre National de la Recherche Scientifique, Institute of Plant Sciences Paris-Saclay, Institut National de la Recherche Agronomique, Université Paris-Sud, Université Evry, Université Paris-SaclayOrsay, France
- POPS Transcriptomic Platform, Institute of Plant Sciences Paris-Saclay, Paris DiderotOrsay, France
| | - Alexandre Boscari
- Centre National de la Recherche Scientifique, Institut National de la Recherche Agronomique, UMR 1355-7254 Institut Sophia Agrobiotech, Université Nice Sophia AntipolisSophia Antipolis, France
| | - Jean-Christophe Boyer
- Biochimie and Physiologie Moléculaire des Plantes, UMR 5004 Centre National de la Recherche Scientifique/386 Institut National de la Recherche Agronomique/SupAgro Montpellier/Université de Montpellier, Campus SupAgro-Institut National de la Recherche AgronomiqueMontpellier, France
| | - Véronique Brunaud
- POPS Transcriptomic Platform, Centre National de la Recherche Scientifique, Institute of Plant Sciences Paris-Saclay, Institut National de la Recherche Agronomique, Université Paris-Sud, Université Evry, Université Paris-SaclayOrsay, France
- POPS Transcriptomic Platform, Institute of Plant Sciences Paris-Saclay, Paris DiderotOrsay, France
| | - Sylvain Cottaz
- Université Grenoble Alpes, CERMAVGrenoble, France
- Centre National de la Recherche Scientifique, CERMAVGrenoble, France
| | - Corinne Rancurel
- Centre National de la Recherche Scientifique, Institut National de la Recherche Agronomique, UMR 1355-7254 Institut Sophia Agrobiotech, Université Nice Sophia AntipolisSophia Antipolis, France
| | - Martine Da Rocha
- Centre National de la Recherche Scientifique, Institut National de la Recherche Agronomique, UMR 1355-7254 Institut Sophia Agrobiotech, Université Nice Sophia AntipolisSophia Antipolis, France
| | - Cécile Fizames
- Biochimie and Physiologie Moléculaire des Plantes, UMR 5004 Centre National de la Recherche Scientifique/386 Institut National de la Recherche Agronomique/SupAgro Montpellier/Université de Montpellier, Campus SupAgro-Institut National de la Recherche AgronomiqueMontpellier, France
| | - Sébastien Fort
- Université Grenoble Alpes, CERMAVGrenoble, France
- Centre National de la Recherche Scientifique, CERMAVGrenoble, France
| | - Isabelle Gaillard
- Biochimie and Physiologie Moléculaire des Plantes, UMR 5004 Centre National de la Recherche Scientifique/386 Institut National de la Recherche Agronomique/SupAgro Montpellier/Université de Montpellier, Campus SupAgro-Institut National de la Recherche AgronomiqueMontpellier, France
| | - Vincent Maillol
- Université Grenoble Alpes, CERMAVGrenoble, France
- Laboratoire d'Informatique, de Robotique et de Microélectronique de Montpellier and Institut de Biologie Computationnelle, Centre National de la Recherche Scientifique and Université MontpellierMontpellier, France
| | - Etienne G. J. Danchin
- Centre National de la Recherche Scientifique, Institut National de la Recherche Agronomique, UMR 1355-7254 Institut Sophia Agrobiotech, Université Nice Sophia AntipolisSophia Antipolis, France
| | - Hatem Rouached
- Biochimie and Physiologie Moléculaire des Plantes, UMR 5004 Centre National de la Recherche Scientifique/386 Institut National de la Recherche Agronomique/SupAgro Montpellier/Université de Montpellier, Campus SupAgro-Institut National de la Recherche AgronomiqueMontpellier, France
| | - Eric Samain
- Université Grenoble Alpes, CERMAVGrenoble, France
- Centre National de la Recherche Scientifique, CERMAVGrenoble, France
| | - Yan-Hua Su
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of SciencesNanjing, China
| | - Julien Thouin
- Biochimie and Physiologie Moléculaire des Plantes, UMR 5004 Centre National de la Recherche Scientifique/386 Institut National de la Recherche Agronomique/SupAgro Montpellier/Université de Montpellier, Campus SupAgro-Institut National de la Recherche AgronomiqueMontpellier, France
| | - Bruno Touraine
- Biochimie and Physiologie Moléculaire des Plantes, UMR 5004 Centre National de la Recherche Scientifique/386 Institut National de la Recherche Agronomique/SupAgro Montpellier/Université de Montpellier, Campus SupAgro-Institut National de la Recherche AgronomiqueMontpellier, France
| | - Alain Puppo
- Centre National de la Recherche Scientifique, Institut National de la Recherche Agronomique, UMR 1355-7254 Institut Sophia Agrobiotech, Université Nice Sophia AntipolisSophia Antipolis, France
| | - Jean-Marie Frachisse
- Institute for Integrative Biology of the Cell, CEA, Centre National de la Recherche Scientifique, Université Paris-Sud, Université Paris-SaclayGif sur Yvette, France
| | - Nicolas Pauly
- Centre National de la Recherche Scientifique, Institut National de la Recherche Agronomique, UMR 1355-7254 Institut Sophia Agrobiotech, Université Nice Sophia AntipolisSophia Antipolis, France
- *Correspondence: Nicolas Pauly
| | - Hervé Sentenac
- Biochimie and Physiologie Moléculaire des Plantes, UMR 5004 Centre National de la Recherche Scientifique/386 Institut National de la Recherche Agronomique/SupAgro Montpellier/Université de Montpellier, Campus SupAgro-Institut National de la Recherche AgronomiqueMontpellier, France
- Hervé Sentenac
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Ye W, Murata Y. Microbe Associated Molecular Pattern Signaling in Guard Cells. FRONTIERS IN PLANT SCIENCE 2016; 7:583. [PMID: 27200056 PMCID: PMC4855242 DOI: 10.3389/fpls.2016.00583] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2015] [Accepted: 04/15/2016] [Indexed: 05/04/2023]
Abstract
Stomata, formed by pairs of guard cells in the epidermis of terrestrial plants, regulate gas exchange, thus playing a critical role in plant growth and stress responses. As natural openings, stomata are exploited by microbes as an entry route. Recent studies reveal that plants close stomata upon guard cell perception of molecular signatures from microbes, microbe associated molecular patterns (MAMPs), to prevent microbe invasion. The perception of MAMPs induces signal transduction including recruitment of second messengers, such as Ca(2+) and H2O2, phosphorylation events, and change of transporter activity, leading to stomatal movement. In the present review, we summarize recent findings in signaling underlying MAMP-induced stomatal movement by comparing with other signalings.
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413
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Riemann M, Dhakarey R, Hazman M, Miro B, Kohli A, Nick P. Exploring Jasmonates in the Hormonal Network of Drought and Salinity Responses. FRONTIERS IN PLANT SCIENCE 2015; 6:1077. [PMID: 26648959 PMCID: PMC4665137 DOI: 10.3389/fpls.2015.01077] [Citation(s) in RCA: 132] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2015] [Accepted: 11/17/2015] [Indexed: 05/18/2023]
Abstract
Present and future food security is a critical issue compounded by the consequences of climate change on agriculture. Stress perception and signal transduction in plants causes changes in gene or protein expression which lead to metabolic and physiological responses. Phytohormones play a central role in the integration of different upstream signals into different adaptive outputs such as changes in the activity of ion-channels, protein modifications, protein degradation, and gene expression. Phytohormone biosynthesis and signaling, and recently also phytohormone crosstalk have been investigated intensively, but the function of jasmonates under abiotic stress is still only partially understood. Although most aspects of jasmonate biosynthesis, crosstalk and signal transduction appear to be similar for biotic and abiotic stress, novel aspects have emerged that seem to be unique for the abiotic stress response. Here, we review the knowledge on the role of jasmonates under drought and salinity. The crosstalk of jasmonate biosynthesis and signal transduction pathways with those of abscisic acid (ABA) is particularly taken into account due to the well-established, central role of ABA under abiotic stress. Likewise, the accumulating evidence of crosstalk of jasmonate signaling with other phytohormones is considered as important element of an integrated phytohormonal response. Finally, protein post-translational modification, which can also occur without de novo transcription, is treated with respect to its implications for phytohormone biosynthesis, signaling and crosstalk. To breed climate-resilient crop varieties, integrated understanding of the molecular processes is required to modulate and tailor particular nodes of the network to positively affect stress tolerance.
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Affiliation(s)
- Michael Riemann
- Molecular Cell Biology, Institute of Botany, Karlsruhe Institute of Technology, Karlsruhe, Germany
| | - Rohit Dhakarey
- Molecular Cell Biology, Institute of Botany, Karlsruhe Institute of Technology, Karlsruhe, Germany
| | - Mohamed Hazman
- Molecular Cell Biology, Institute of Botany, Karlsruhe Institute of Technology, Karlsruhe, Germany
| | - Berta Miro
- Plant Breeding Genetics and Biotechnology Division, International Rice Research Institute, Makati, Philippines
| | - Ajay Kohli
- Plant Breeding Genetics and Biotechnology Division, International Rice Research Institute, Makati, Philippines
| | - Peter Nick
- Molecular Cell Biology, Institute of Botany, Karlsruhe Institute of Technology, Karlsruhe, Germany
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414
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Kamano S, Kume S, Iida K, Lei KJ, Nakano M, Nakayama Y, Iida H. Transmembrane Topologies of Ca2+-permeable Mechanosensitive Channels MCA1 and MCA2 in Arabidopsis thaliana. J Biol Chem 2015; 290:30901-9. [PMID: 26555262 DOI: 10.1074/jbc.m115.692574] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2015] [Indexed: 11/06/2022] Open
Abstract
Sensing mechanical stresses, including touch, stretch, compression, and gravity, is crucial for growth and development in plants. A good mechanosensor candidate is the Ca(2+)-permeable mechanosensitive (MS) channel, the pore of which opens to permeate Ca(2+) in response to mechanical stresses. However, the structure-function relationships of plant MS channels are poorly understood. Arabidopsis MCA1 and MCA2 form a homotetramer and exhibit Ca(2+)-permeable MS channel activity; however, their structures have only been partially elucidated. The transmembrane topologies of these ion channels need to be determined in more detail to elucidate the underlying regulatory mechanisms. We herein determined the topologies of MCA1 and MCA2 using two independent methods, the Suc2C reporter and split-ubiquitin yeast two-hybrid methods, and found that both proteins are single-pass type I integral membrane proteins with extracellular N termini and intracellular C termini. These results imply that an EF hand-like motif, coiled-coil motif, and plac8 motif are all present in the cytoplasm. Thus, the activities of both channels can be regulated by intracellular Ca(2+) and protein interactions.
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Affiliation(s)
- Shumpei Kamano
- From the Department of Biology, Tokyo Gakugei University, 4-1-1 Nukui kita-machi, Koganei, Tokyo 184-8501, Japan and
| | - Shinichiro Kume
- From the Department of Biology, Tokyo Gakugei University, 4-1-1 Nukui kita-machi, Koganei, Tokyo 184-8501, Japan and
| | - Kazuko Iida
- Laboratory of Biomembrane, Tokyo Metropolitan Institute of Medical Science, 2-1-6 Kamikitazawa, Setagaya, Tokyo 156-8506, Japan
| | - Kai-Jian Lei
- From the Department of Biology, Tokyo Gakugei University, 4-1-1 Nukui kita-machi, Koganei, Tokyo 184-8501, Japan and
| | - Masataka Nakano
- From the Department of Biology, Tokyo Gakugei University, 4-1-1 Nukui kita-machi, Koganei, Tokyo 184-8501, Japan and
| | - Yoshitaka Nakayama
- From the Department of Biology, Tokyo Gakugei University, 4-1-1 Nukui kita-machi, Koganei, Tokyo 184-8501, Japan and
| | - Hidetoshi Iida
- From the Department of Biology, Tokyo Gakugei University, 4-1-1 Nukui kita-machi, Koganei, Tokyo 184-8501, Japan and
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415
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Biancucci M, Mattioli R, Moubayidin L, Sabatini S, Costantino P, Trovato M. Proline affects the size of the root meristematic zone in Arabidopsis. BMC PLANT BIOLOGY 2015; 15:263. [PMID: 26514776 PMCID: PMC4625561 DOI: 10.1186/s12870-015-0637-8] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2015] [Accepted: 10/01/2015] [Indexed: 05/19/2023]
Abstract
BACKGROUND We reported previously that root elongation in Arabidopsis is promoted by exogenous proline, raising the possibility that this amino acid may modulate root growth. RESULTS To evaluate this hypothesis we used a combination of genetic, pharmacological and molecular analyses, and showed that proline specifically affects root growth by modulating the size of the root meristem. The effects of proline on meristem size are parallel to, and independent from, hormonal pathways, and do not involve the expression of genes controlling cell differentiation at the transition zone. On the contrary, proline appears to control cell division in early stages of postembryonic root development, as shown by the expression of the G2/M-specific CYCLINB1;1 (CYCB1;1) gene. CONCLUSIONS The overall data suggest that proline can modulate the size of root meristematic zone in Arabidopsis likely controlling cell division and, in turn, the ratio between cell division and cell differentiation.
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Affiliation(s)
- Marco Biancucci
- Dipartimento di Biologia e Biotecnologie, Sapienza, Università di Roma, P.le Aldo Moro 5, 00185, Rome, Italy.
| | - Roberto Mattioli
- Dipartimento di Biologia e Biotecnologie, Sapienza, Università di Roma, P.le Aldo Moro 5, 00185, Rome, Italy.
| | - Laila Moubayidin
- Dipartimento di Biologia e Biotecnologie, Sapienza, Università di Roma, P.le Aldo Moro 5, 00185, Rome, Italy.
| | - Sabrina Sabatini
- Dipartimento di Biologia e Biotecnologie, Sapienza, Università di Roma, P.le Aldo Moro 5, 00185, Rome, Italy.
| | - Paolo Costantino
- Dipartimento di Biologia e Biotecnologie, Sapienza, Università di Roma, P.le Aldo Moro 5, 00185, Rome, Italy.
| | - Maurizio Trovato
- Dipartimento di Biologia e Biotecnologie, Sapienza, Università di Roma, P.le Aldo Moro 5, 00185, Rome, Italy.
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416
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Li Y, Yuan F, Wen Z, Li Y, Wang F, Zhu T, Zhuo W, Jin X, Wang Y, Zhao H, Pei ZM, Han S. Genome-wide survey and expression analysis of the OSCA gene family in rice. BMC PLANT BIOLOGY 2015; 15:261. [PMID: 26503287 PMCID: PMC4624379 DOI: 10.1186/s12870-015-0653-8] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2015] [Accepted: 10/22/2015] [Indexed: 05/18/2023]
Abstract
BACKGROUND Reception of and response to exogenous and endogenous osmotic changes is important to sustain plant growth and development, as well as reproductive formation. Hyperosmolality-gated calcium-permeable channels (OSCA) were first characterised as an osmosensor in Arabidopsis and are involved in the perception of extracellular changes to trigger hyperosmolality-induced [Ca(2+)]i increases (OICI). To explore the potential biological functions of OSCAs in rice, we performed a bioinformatics and expression analysis of the OsOSCA gene family. RESULTS A total of 11 OsOSCA genes were identified from the genome database of Oryza sativa L. Japonica. Based on their sequence composition and phylogenetic relationship, the OsOSCA family was classified into four clades. Gene and protein structure analysis indicated that the 11 OsOSCAs shared similar structures with their homologs in Oryza sativa L. ssp. Indica, Oryza glaberrima, and Oryza brachyantha. Multiple sequence alignment analysis revealed a conserved DUF221 domain in these members, in which the first three TMs were conserved, while the others were not. The expression profiles of OsOSCA genes were analysed at different stages of vegetative growth, reproductive development, and under osmotic-associated abiotic stresses. We found that four and six OsOSCA genes showed a clear correlation between the expression profile and osmotic changes during caryopsis development and seed imbibition, respectively. Orchestrated transcription of three OsOSCAs was strongly associated with the circadian clock. Moreover, osmotic-related abiotic stress differentially induced the expression of 10 genes. CONCLUSION The entire OSCA family is characterised by the presence of a conserved DUF221 domain, which functions as an osmotic-sensing calcium channel. The phylogenetic tree of OSCA genes showed that two subspecies of cultivated rice, Oryza sativa L. ssp. Japonica and Oryza sativa L. ssp. Indica, are more closely related than wild rice Oryza glaberrima, while Oryza brachyantha was less closely related. OsOSCA expression is organ- and tissue-specific and regulated by different osmotic-related abiotic stresses in rice. These findings will facilitate further research in this gene family and provide potential target genes for generation of genetically modified osmotic-stress-resistant plants.
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Affiliation(s)
- Yunshuang Li
- Beijing Key Laboratory of Gene Resource and Molecular Development, College of Life Sciences, Beijing Normal University, Beijing, 100875, China.
| | - Fang Yuan
- Department of Biology, Duke University, Durham, NC, 27708, USA.
| | - Zhaohong Wen
- Beijing Key Laboratory of Gene Resource and Molecular Development, College of Life Sciences, Beijing Normal University, Beijing, 100875, China.
| | - Yihao Li
- Beijing Key Laboratory of Gene Resource and Molecular Development, College of Life Sciences, Beijing Normal University, Beijing, 100875, China.
| | - Fang Wang
- Beijing Key Laboratory of Gene Resource and Molecular Development, College of Life Sciences, Beijing Normal University, Beijing, 100875, China.
| | - Tao Zhu
- Beijing Key Laboratory of Gene Resource and Molecular Development, College of Life Sciences, Beijing Normal University, Beijing, 100875, China.
| | - Wenqing Zhuo
- Beijing Key Laboratory of Gene Resource and Molecular Development, College of Life Sciences, Beijing Normal University, Beijing, 100875, China.
| | - Xi Jin
- Beijing Key Laboratory of Gene Resource and Molecular Development, College of Life Sciences, Beijing Normal University, Beijing, 100875, China.
| | - Yingdian Wang
- Beijing Key Laboratory of Gene Resource and Molecular Development, College of Life Sciences, Beijing Normal University, Beijing, 100875, China.
| | - Heping Zhao
- Beijing Key Laboratory of Gene Resource and Molecular Development, College of Life Sciences, Beijing Normal University, Beijing, 100875, China.
| | - Zhen-Ming Pei
- Department of Biology, Duke University, Durham, NC, 27708, USA.
| | - Shengcheng Han
- Beijing Key Laboratory of Gene Resource and Molecular Development, College of Life Sciences, Beijing Normal University, Beijing, 100875, China.
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417
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DCA1 Acts as a Transcriptional Co-activator of DST and Contributes to Drought and Salt Tolerance in Rice. PLoS Genet 2015; 11:e1005617. [PMID: 26496194 PMCID: PMC4619773 DOI: 10.1371/journal.pgen.1005617] [Citation(s) in RCA: 65] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2015] [Accepted: 09/28/2015] [Indexed: 11/19/2022] Open
Abstract
Natural disasters, including drought and salt stress, seriously threaten food security. In previous work we cloned a key zinc finger transcription factor gene, Drought and Salt Tolerance (DST), a negative regulator of drought and salt tolerance that controls stomatal aperture in rice. However, the exact mechanism by which DST regulates the expression of target genes remains unknown. In the present study, we demonstrated that DST Co-activator 1 (DCA1), a previously unknown CHY zinc finger protein, acts as an interacting co-activator of DST. DST was found to physically interact with itself and to form a heterologous tetramer with DCA1. This transcriptional complex appears to regulate the expression of peroxidase 24 precursor (Prx 24), a gene encoding an H2O2 scavenger that is more highly expressed in guard cells. Downregulation of DCA1 significantly enhanced drought and salt tolerance in rice, and overexpression of DCA1 increased sensitivity to stress treatment. These phenotypes were mainly influenced by DCA1 and negatively regulated stomatal closure through the direct modulation of genes associated with H2O2 homeostasis. Our findings establish a framework for plant drought and salt stress tolerance through the DCA1-DST-Prx24 pathway. Moreover, due to the evolutionary and functional conservation of DCA1 and DST in plants, engineering of this pathway has the potential to improve tolerance to abiotic stress in other important crop species.
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418
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Li G, Boudsocq M, Hem S, Vialaret J, Rossignol M, Maurel C, Santoni V. The calcium-dependent protein kinase CPK7 acts on root hydraulic conductivity. PLANT, CELL & ENVIRONMENT 2015; 38:1312-20. [PMID: 25366820 DOI: 10.1111/pce.12478] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2014] [Revised: 10/24/2014] [Accepted: 10/27/2014] [Indexed: 05/20/2023]
Abstract
The hydraulic conductivity of plant roots (Lp(r)) is determined in large part by the activity of aquaporins. Mechanisms occurring at the post-translational level, in particular phosphorylation of aquaporins of the plasma membrane intrinsic protein 2 (PIP2) subfamily, are thought to be of critical importance for regulating root water transport. However, knowledge of protein kinases and phosphatases acting on aquaporin function is still scarce. In the present work, we investigated the Lp(r) of knockout Arabidopsis plants for four Ca(2+)-dependent protein kinases. cpk7 plants showed a 30% increase in Lp(r) because of a higher aquaporin activity. A quantitative proteomic analysis of wild-type and cpk7 plants revealed that PIP gene expression and PIP protein quantity were not correlated and that CPK7 has no effect on PIP2 phosphorylation. In contrast, CPK7 exerts a negative control on the cellular abundance of PIP1s, which likely accounts for the higher Lp(r) of cpk7. In addition, this study revealed that the cellular amount of a few additional proteins including membrane transporters is controlled by CPK7. The overall work provides evidence for CPK7-dependent stability of specific membrane proteins.
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Affiliation(s)
- Guowei Li
- Biochimie et Physiologie Moléculaire des Plantes, INRA/CNRS/SupAgro/UM2, UMR 5004, 2 Place Viala, Montpellier Cedex 1, 34060, France
| | - Marie Boudsocq
- Saclay Plant Sciences, Institut des Sciences du Végétal, UPR2355, 1 Avenue de la Terrasse, Gif-sur-Yvette Cedex, 91198, France
| | - Sonia Hem
- Laboratoire de Protéomique Fonctionnelle, UR1199, 1 Place Viala, Montpellier Cedex 1, 34060, France
| | - Jérôme Vialaret
- Laboratoire de Protéomique Fonctionnelle, UR1199, 1 Place Viala, Montpellier Cedex 1, 34060, France
| | - Michel Rossignol
- Laboratoire de Protéomique Fonctionnelle, UR1199, 1 Place Viala, Montpellier Cedex 1, 34060, France
| | - Christophe Maurel
- Biochimie et Physiologie Moléculaire des Plantes, INRA/CNRS/SupAgro/UM2, UMR 5004, 2 Place Viala, Montpellier Cedex 1, 34060, France
| | - Véronique Santoni
- Biochimie et Physiologie Moléculaire des Plantes, INRA/CNRS/SupAgro/UM2, UMR 5004, 2 Place Viala, Montpellier Cedex 1, 34060, France
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419
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Ohnishi M, Kadohama N, Suzuki Y, Kajiyama T, Shichijo C, Ishizaki K, Fukaki H, Iida H, Kambara H, Mimura T. Involvement of Ca2+ in Vacuole Degradation Caused by a Rapid Temperature Decrease in Saintpaulia Palisade Cells: A Case of Gene Expression Analysis in a Specialized Small Tissue. PLANT & CELL PHYSIOLOGY 2015; 56:1297-1305. [PMID: 25941231 DOI: 10.1093/pcp/pcv048] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2014] [Accepted: 03/09/2015] [Indexed: 06/04/2023]
Abstract
Saintpaulia (African violet) leaves are known to be damaged by a rapid temperature decrease when cold water is applied to the leaf surface; the injury is ascribed to the chloroplast damage caused by the cytosolic pH decrease following the degradation of the vacuolar membrane in the palisade cells. In this report, we present evidence for the involvement of Ca(2+) in facilitating the collapse of the vacuolar membrane and in turn in the temperature sensitivity of Saintpaulia leaves. In the presence of a Ca(2+) chelator (EGTA) or certain Ca(2+) channel inhibitors (Gd(3+) or La(3+)) but not others (verapamil or nifedipine), the pH of the vacuole, monitored through BCECF (2',7'-bis(carboxyethyl)-4 or 5-carboxyfluorescein) fluorescence, did not increase in response to a rapid temperature drop. These pharmacological observations are consistent with the involvement of mechanosensitive Ca(2+) channels in the collapse of the vacuolar membrane. The high level of expression of an MCA- (Arabidopsis mechanosensitive Ca(2+) channel) like gene, a likely candidate for a mechanosensitive Ca(2+) channel(s) in plant cells, was confirmed in the palisade tissue in Saintpaulia leaves by using a newly developed method of gene expression analysis for the specialized small tissues.
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Affiliation(s)
- Miwa Ohnishi
- Department of Biology, Graduate School of Science, Kobe University, Rokkodai-cho 1-1, Nada-ku, Kobe, 657-8501 Japan
| | - Noriaki Kadohama
- Department of Biology, Graduate School of Science, Kobe University, Rokkodai-cho 1-1, Nada-ku, Kobe, 657-8501 Japan
| | - Yoshihiro Suzuki
- Department of Biological Science, Graduate School of Science, Kanagawa University, Tsuchiya 2946, Hiratsuka, Kanagawa, 259-1293 Japan
| | - Tomoharu Kajiyama
- Central Research Laboratory, Hitachi, Ltd., 1-280 Higashi-Koigakubo, Kokubunji-shi, Tokyo, 185-8601, Japan
| | - Chizuko Shichijo
- Department of Biology, Graduate School of Science, Kobe University, Rokkodai-cho 1-1, Nada-ku, Kobe, 657-8501 Japan
| | - Kimitsune Ishizaki
- Department of Biology, Graduate School of Science, Kobe University, Rokkodai-cho 1-1, Nada-ku, Kobe, 657-8501 Japan
| | - Hidehiro Fukaki
- Department of Biology, Graduate School of Science, Kobe University, Rokkodai-cho 1-1, Nada-ku, Kobe, 657-8501 Japan
| | - Hidetoshi Iida
- Department of Biology, Tokyo Gakugei University, Koganei-shi, Tokyo, 184-8501 Japan
| | - Hideki Kambara
- Central Research Laboratory, Hitachi, Ltd., 1-280 Higashi-Koigakubo, Kokubunji-shi, Tokyo, 185-8601, Japan
| | - Tetsuro Mimura
- Department of Biology, Graduate School of Science, Kobe University, Rokkodai-cho 1-1, Nada-ku, Kobe, 657-8501 Japan
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420
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Zhang Y, Wang Y, Taylor JL, Jiang Z, Zhang S, Mei F, Wu Y, Wu P, Ni J. Aequorin-based luminescence imaging reveals differential calcium signalling responses to salt and reactive oxygen species in rice roots. JOURNAL OF EXPERIMENTAL BOTANY 2015; 66:2535-45. [PMID: 25754405 PMCID: PMC4986864 DOI: 10.1093/jxb/erv043] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
It is well established that both salt and reactive oxygen species (ROS) stresses are able to increase the concentration of cytosolic free Ca(2+) ([Ca(2+)]i), which is caused by the flux of calcium (Ca(2+)). However, the differences between these two processes are largely unknown. Here, we introduced recombinant aequorin into rice (Oryza sativa) and examined the change in [Ca(2+)]i in response to salt and ROS stresses. The transgenic rice harbouring aequorin showed strong luminescence in roots when treated with exogenous Ca(2+). Considering the histological differences in roots between rice and Arabidopsis, we reappraised the discharging solution, and suggested that the percentage of ethanol should be 25%. Different concentrations of NaCl induced immediate [Ca(2+)]i spikes with the same durations and phases. In contrast, H₂O₂ induced delayed [Ca(2+)]i spikes with different peaks according to the concentrations of H₂O₂. According to the Ca(2+) inhibitor research, we also showed that the sources of Ca(2+) induced by NaCl and H₂O₂ are different. Furthermore, we evaluated the contribution of [Ca(2+)]i responses in the NaCl- and H₂O₂-induced gene expressions respectively, and present a Ca(2+)- and H₂O₂-mediated molecular signalling model for the initial response to NaCl in rice.
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Affiliation(s)
- Yanyan Zhang
- College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 310036, China
| | - Yifeng Wang
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Science, Zhejiang University, Hangzhou 310058, China
| | - Jemma L Taylor
- School of Life Sciences, Gibbet Hill Campus, University of Warwick, Coventry CV4 7AL, United Kingdom
| | - Zhonghao Jiang
- College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 310036, China
| | - Shu Zhang
- College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 310036, China
| | - Fengling Mei
- College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 310036, China
| | - Yunrong Wu
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Science, Zhejiang University, Hangzhou 310058, China
| | - Ping Wu
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Science, Zhejiang University, Hangzhou 310058, China
| | - Jun Ni
- College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 310036, China
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421
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Haswell ES, Verslues PE. The ongoing search for the molecular basis of plant osmosensing. ACTA ACUST UNITED AC 2015; 145:389-94. [PMID: 25870206 PMCID: PMC4411250 DOI: 10.1085/jgp.201411295] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Elizabeth S Haswell
- Department of Biology, Washington University in Saint Louis, Saint Louis, MO 63130
| | - Paul E Verslues
- Institute of Plant and Microbial Biology, Academia Sinica, Taipei 11529, Taiwan
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422
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Robbins NE, Dinneny JR. The divining root: moisture-driven responses of roots at the micro- and macro-scale. JOURNAL OF EXPERIMENTAL BOTANY 2015; 66:2145-54. [PMID: 25617469 PMCID: PMC4817643 DOI: 10.1093/jxb/eru496] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Water is fundamental to plant life, but the mechanisms by which plant roots sense and respond to variations in water availability in the soil are poorly understood. Many studies of responses to water deficit have focused on large-scale effects of this stress, but have overlooked responses at the sub-organ or cellular level that give rise to emergent whole-plant phenotypes. We have recently discovered hydropatterning, an adaptive environmental response in which roots position new lateral branches according to the spatial distribution of available water across the circumferential axis. This discovery illustrates that roots are capable of sensing and responding to water availability at spatial scales far lower than those normally studied for such processes. This review will explore how roots respond to water availability with an emphasis on what is currently known at different spatial scales. Beginning at the micro-scale, there is a discussion of water physiology at the cellular level and proposed sensory mechanisms cells use to detect osmotic status. The implications of these principles are then explored in the context of cell and organ growth under non-stress and water-deficit conditions. Following this, several adaptive responses employed by roots to tailor their functionality to the local moisture environment are discussed, including patterning of lateral root development and generation of hydraulic barriers to limit water loss. We speculate that these micro-scale responses are necessary for optimal functionality of the root system in a heterogeneous moisture environment, allowing for efficient water uptake with minimal water loss during periods of drought.
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Affiliation(s)
- Neil E Robbins
- Carnegie Institution for Science, Department of Plant Biology, 260 Panama Street, Stanford, CA 94305, USA Department of Biology, Stanford University, 371 Serra Mall, Stanford, CA 94305, USA
| | - José R Dinneny
- Carnegie Institution for Science, Department of Plant Biology, 260 Panama Street, Stanford, CA 94305, USA
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423
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Chen J, Gutjahr C, Bleckmann A, Dresselhaus T. Calcium signaling during reproduction and biotrophic fungal interactions in plants. MOLECULAR PLANT 2015; 8:595-611. [PMID: 25660409 DOI: 10.1016/j.molp.2015.01.023] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2014] [Revised: 01/18/2015] [Accepted: 01/20/2015] [Indexed: 05/25/2023]
Abstract
Many recent studies have indicated that cellular communications during plant reproduction, fungal invasion, and defense involve identical or similar molecular players and mechanisms. Indeed, pollen tube invasion and sperm release shares many common features with infection of plant tissue by fungi and oomycetes, as a tip-growing intruder needs to communicate with the receptive cells to gain access into a cell and tissue. Depending on the compatibility between cells, interactions may result in defense, invasion, growth support, or cell death. Plant cells stimulated by both pollen tubes and fungal hyphae secrete, for example, small cysteine-rich proteins and receptor-like kinases are activated leading to intracellular signaling events such as the production of reactive oxygen species (ROS) and the generation of calcium (Ca(2+)) transients. The ubiquitous and versatile second messenger Ca(2+) thereafter plays a central and crucial role in modulating numerous downstream signaling processes. In stimulated cells, it elicits both fast and slow cellular responses depending on the shape, frequency, amplitude, and duration of the Ca(2+) transients. The various Ca(2+) signatures are transduced into cellular information via a battery of Ca(2+)-binding proteins. In this review, we focus on Ca(2+) signaling and discuss its occurrence during plant reproduction and interactions of plant cells with biotrophic filamentous microbes. The participation of Ca(2+) in ROS signaling pathways is also discussed.
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Affiliation(s)
- Junyi Chen
- Cell Biology and Plant Biochemistry, Biochemie-Zentrum Regensburg, University of Regensburg, Universitätsstraße 31, D-93053 Regensburg, Germany
| | - Caroline Gutjahr
- Faculty of Biology Genetics, Biocenter Martinsried, University of Munich (LMU), Grosshaderner Strasse 2-4, D-82152 Martinsried, Germany
| | - Andrea Bleckmann
- Cell Biology and Plant Biochemistry, Biochemie-Zentrum Regensburg, University of Regensburg, Universitätsstraße 31, D-93053 Regensburg, Germany
| | - Thomas Dresselhaus
- Cell Biology and Plant Biochemistry, Biochemie-Zentrum Regensburg, University of Regensburg, Universitätsstraße 31, D-93053 Regensburg, Germany.
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424
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Vermeer JEM, Geldner N. Lateral root initiation in Arabidopsis thaliana: a force awakens. F1000PRIME REPORTS 2015; 7:32. [PMID: 25926983 PMCID: PMC4371239 DOI: 10.12703/p7-32] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Osmotically driven turgor pressure of plant cells can be higher than that of a car tire. It puts tremendous forces onto cell walls and drives cell growth and changes in cell shape. This has given rise to unique mechanisms to control organ formation compared to metazoans. The fascinating interplay between forces and local cellular reorganization is still poorly understood. Growth of lateral roots is a prominent example of a developmental process in which mechanical forces between neighboring cells are generated and must be dealt with. Lateral roots initiate from a single cell layer that resides deep within the primary root. On their way out, lateral roots grow through the overlying endodermal, cortical, and epidermal cell layers. It was recently demonstrated that endodermal cells actively accommodate lateral root formation. Interfering genetically with these accommodating responses in the endodermis completely blocks cell proliferation in the pericycle. The lateral root system provides a unique opportunity to elucidate the molecular and cellular mechanisms whereby mechanical forces and intercellular communication regulate spatial accommodation during plant development.
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425
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Calcium is an organizer of cell polarity in plants. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2015; 1853:2168-72. [PMID: 25725133 DOI: 10.1016/j.bbamcr.2015.02.017] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2015] [Revised: 02/05/2015] [Accepted: 02/17/2015] [Indexed: 01/07/2023]
Abstract
Cell polarity is a fundamental property of pro- and eukaryotic cells. It is necessary for coordination of cell division, cell morphogenesis and signaling processes. How polarity is generated and maintained is a complex issue governed by interconnected feed-back regulations between small GTPase signaling and membrane tension-based signaling that controls membrane trafficking, and cytoskeleton organization and dynamics. Here, we will review the potential role for calcium as a crucial signal that connects and coordinates the respective processes during polarization processes in plants. This article is part of a Special Issue entitled: 13th European Symposium on Calcium.
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426
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Hamann T. The plant cell wall integrity maintenance mechanism-concepts for organization and mode of action. PLANT & CELL PHYSIOLOGY 2015; 56:215-23. [PMID: 25416836 DOI: 10.1093/pcp/pcu164] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
One of the main differences between plant and animal cells are the walls surrounding plant cells providing structural support during development and protection like an adaptive armor against biotic and abiotic stress. During recent years it has become widely accepted that plant cells use a dedicated system to monitor and maintain the functional integrity of their walls. Maintenance of integrity is achieved by modifying the cell wall and cellular metabolism in order to permit tightly controlled changes in wall composition and structure. While a substantial amount of evidence supporting the existence of the mechanism has been reported, knowledge regarding its precise mode of action is still limited. The currently available evidence suggests similarities of the plant mechanism with respect to both design principles and molecular components involved to the very well characterized system active in the model organism Saccharomyces cerevisiae. There the system has been implicated in cell morphogenesis as well as response to abiotic stresses such as osmotic challenges. Here the currently available knowledge on the yeast system will be reviewed initially to provide a framework for the subsequent discussion of the plant cell wall integrity maintenance mechanism. The review will then end with a discussion on possible design principles for the cell wall integrity maintenance mechanism and the function of the plant turgor pressure in this context.
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Affiliation(s)
- Thorsten Hamann
- Department of Biology, Høgskoleringen 5, Realfagbygget, Norwegian University of Science and Technology, 7491 Trondheim, Norway
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427
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Tombuloglu G, Tombuloglu H, Sakcali MS, Unver T. High-throughput transcriptome analysis of barley (Hordeum vulgare) exposed to excessive boron. Gene 2015; 557:71-81. [DOI: 10.1016/j.gene.2014.12.012] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2014] [Revised: 12/04/2014] [Accepted: 12/07/2014] [Indexed: 01/09/2023]
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428
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Espinosa F, Garrido I, Álvarez-Tinaut MC. Reflexions on some aspects of the interactions among ROS, RNS, and Ca(2+) in response to a mycorrhizal or a pathogenic fungus. PLANT SIGNALING & BEHAVIOR 2015; 10:e1049789. [PMID: 26366845 PMCID: PMC4883917 DOI: 10.1080/15592324.2015.1049789] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 03/11/2015] [Revised: 05/06/2015] [Accepted: 05/06/2015] [Indexed: 06/05/2023]
Abstract
In vivo redox activities in the apoplast of axenically cultured intact seedling roots (superoxide anion generation, and superoxide dismutase and peroxidase activities) in contact with the compatible arbuscular mycorrhizal fungus (AMF) were clearly attenuated in comparison with those in contact with the pathogenic fungus (PF) or treated with MeJA, even at the early stages of treatment. Contact of roots with the AMF did not enhance the biosynthesis of phenolic compounds (total phenolics, flavonoids, and phenylpropanoid glycosides), while contact with the PF significantly enhanced the biosynthesis of all phenolic fractions. Reactive oxygen and nitrogen species both seemed to be involved in these responses from the first moments of contact, but the fluorescence imaging of roots showed that ROS were mainly accumulated in the apoplast while NO was mainly stored in the cytosol. In conclusion, intact olive seedling roots clearly differentiated between AMF and PF.
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429
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Kurusu T, Kuchitsu K, Tada Y. Plant signaling networks involving Ca(2+) and Rboh/Nox-mediated ROS production under salinity stress. FRONTIERS IN PLANT SCIENCE 2015; 6:427. [PMID: 26113854 PMCID: PMC4461821 DOI: 10.3389/fpls.2015.00427] [Citation(s) in RCA: 99] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2015] [Accepted: 05/26/2015] [Indexed: 05/02/2023]
Abstract
Salinity stress, which induces both ionic and osmotic damage, impairs plant growth and causes severe reductions in crop yield. Plants are equipped with defense responses against salinity stress such as regulation of ion transport including Na(+) and K(+), accumulation of compatible solutes and stress-related gene expression. The initial Ca(2+) influx mediated by plasma membrane ion channels has been suggested to be crucial for the adaptive signaling. NADPH oxidase (Nox)-mediated production of reactive oxygen species (ROS) has also been suggested to play crucial roles in regulating adaptation to salinity stress in several plant species including halophytes. Respiratory burst oxidase homolog (Rboh) proteins show the ROS-producing Nox activity, which are synergistically activated by the binding of Ca(2+) to EF-hand motifs as well as Ca(2+)-dependent phosphorylation. We herein review molecular identity, structural features and roles of the Ca(2+)-permeable channels involved in early salinity and osmotic signaling, and comparatively discuss the interrelationships among spatiotemporal dynamic changes in cytosolic concentrations of free Ca(2+), Rboh-mediated ROS production, and downstream signaling events during salinity adaptation in planta.
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Affiliation(s)
- Takamitsu Kurusu
- School of Bioscience and Biotechnology, Tokyo University of TechnologyHachioji, Japan
- Department of Applied Biological Science, Tokyo University of ScienceNoda, Japan
- Research Institute for Science and Technology, Tokyo University of ScienceNoda, Japan
- *Correspondence: Takamitsu Kurusu, School of Bioscience and Biotechnology, Tokyo University of Technology, 1404-1 Katakura, Hachioji, Tokyo 192-0982, Japan
| | - Kazuyuki Kuchitsu
- Department of Applied Biological Science, Tokyo University of ScienceNoda, Japan
- Research Institute for Science and Technology, Tokyo University of ScienceNoda, Japan
| | - Yuichi Tada
- School of Bioscience and Biotechnology, Tokyo University of TechnologyHachioji, Japan
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430
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Yu Z, Taylor JL, He Y, Ni J. Enlightenment on the aequorin-based platform for screening Arabidopsis stress sensory channels related to calcium signaling. PLANT SIGNALING & BEHAVIOR 2015; 10:e1057366. [PMID: 26336841 PMCID: PMC4883862 DOI: 10.1080/15592324.2015.1057366] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2015] [Revised: 05/23/2015] [Accepted: 05/27/2015] [Indexed: 06/05/2023]
Abstract
Free calcium ions (Ca(2+)) are an important signal molecule in response to a large array of external stimuli encountered by plants. Using the aequorin-based Ca(2+) recording system, tremendous progress has been made in understanding the Ca(2+) responses to biotic or abiotic stresses in dicotyledonous Arabidopsis. However, due to the lack of a similar detection system, little information has been obtained from the monocotyledonous rice (Oryza sativa). Recombinant aequorin has been introduced into rice, and the Ca(2+) responses to NaCl and H2O2 in rice roots were characterized. Although rice calcium signal sensor research has just started, the transgenic rice expressing aequorin provides a good platform to study rice adapted to different environmental conditions.
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Affiliation(s)
- Zhiming Yu
- College of Life and Environmental Sciences; Hangzhou Normal University; Hangzhou, China
| | - Jemma L Taylor
- School of Life Sciences; Gibbet Hill Campus; University of Warwick; Coventry, United Kingdom
| | - Yue He
- College of Life and Environmental Sciences; Hangzhou Normal University; Hangzhou, China
| | - Jun Ni
- College of Life and Environmental Sciences; Hangzhou Normal University; Hangzhou, China
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431
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Hamilton ES, Schlegel AM, Haswell ES. United in diversity: mechanosensitive ion channels in plants. ANNUAL REVIEW OF PLANT BIOLOGY 2014; 66:113-37. [PMID: 25494462 PMCID: PMC4470482 DOI: 10.1146/annurev-arplant-043014-114700] [Citation(s) in RCA: 125] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Mechanosensitive (MS) ion channels are a common mechanism for perceiving and responding to mechanical force. This class of mechanoreceptors is capable of transducing membrane tension directly into ion flux. In plant systems, MS ion channels have been proposed to play a wide array of roles, from the perception of touch and gravity to the osmotic homeostasis of intracellular organelles. Three families of plant MS ion channels have been identified: the MscS-like (MSL), Mid1-complementing activity (MCA), and two-pore potassium (TPK) families. Channels from these families vary widely in structure and function, localize to multiple cellular compartments, and conduct chloride, calcium, and/or potassium ions. However, they are still likely to represent only a fraction of the MS ion channel diversity in plant systems.
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Affiliation(s)
- Eric S. Hamilton
- Department of Biology, Washington University in Saint Louis, Saint Louis, Missouri 63130
| | - Angela M. Schlegel
- Department of Biology, Washington University in Saint Louis, Saint Louis, Missouri 63130
| | - Elizabeth S. Haswell
- Department of Biology, Washington University in Saint Louis, Saint Louis, Missouri 63130
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432
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Kumari A, Jewaria PK, Bergmann DC, Kakimoto T. Arabidopsis reduces growth under osmotic stress by decreasing SPEECHLESS protein. PLANT & CELL PHYSIOLOGY 2014; 55:2037-46. [PMID: 25381317 PMCID: PMC4318929 DOI: 10.1093/pcp/pcu159] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Plants, which are sessile unlike most animals, have evolved a system to reduce growth under stress; however, the molecular mechanisms of this stress response are not well known. During programmed development, a fraction of the leaf epidermal precursor cells become meristemoid mother cells (MMCs), which are stem cells that produce both stomatal guard cells and epidermal pavement cells. Here we report that Arabidopsis plants, in response to osmotic stress, post-transcriptionally decrease the protein level of SPEECHLESS, the transcription factor promoting MMC identity, through the action of a mitogen-activated protein kinase (MAPK) cascade. The growth reduction under osmotic stress was lessened by inhibition of the MAPK cascade or by a mutation that disrupted the MAPK target amino acids in SPEECHLESS, indicating that Arabidopsis reduces growth under stress by integrating the osmotic stress signal into the MAPK-SPEECHLESS core developmental pathway.
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Affiliation(s)
- Archana Kumari
- Graduate School of Science, Osaka University, Toyonaka, Osaka, 560-0043 Japan
| | - Pawan K Jewaria
- Graduate School of Science, Osaka University, Toyonaka, Osaka, 560-0043 Japan Present address: Molecular Genetics, Leobener Str. 2, NW2, B 1030D, 28359 Bremen, Germany
| | - Dominique C Bergmann
- Howard Hughes Medical Institute and Department of Biology, Stanford University, Stanford, CA 94305-5020, USA
| | - Tatsuo Kakimoto
- Graduate School of Science, Osaka University, Toyonaka, Osaka, 560-0043 Japan
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433
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Adler EM. Of tracking channel activity, modulating AMPA receptor function, permeating potassium ions, and the plant response to osmotic stress. J Gen Physiol 2014; 144:491-3. [PMID: 25422500 PMCID: PMC4242810 DOI: 10.1085/jgp.201411317] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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434
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Edel KH, Kudla J. Increasing complexity and versatility: how the calcium signaling toolkit was shaped during plant land colonization. Cell Calcium 2014; 57:231-46. [PMID: 25477139 DOI: 10.1016/j.ceca.2014.10.013] [Citation(s) in RCA: 80] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2014] [Accepted: 10/27/2014] [Indexed: 12/22/2022]
Abstract
Calcium serves as a versatile messenger in adaptation reactions and developmental processes in plants and animals. Eukaryotic cells generate cytosolic Ca(2+) signals via Ca(2+) conducting channels. Ca(2+) signals are represented in form of stimulus-specific spatially and temporally defined Ca(2+) signatures. These Ca(2+) signatures are detected, decoded and transmitted to downstream responses by an elaborate toolkit of Ca(2+) binding proteins that function as Ca(2+) sensors. In this article, we examine the distribution and evolution of Ca(2+)-conducting channels and Ca(2+) decoding proteins in the plant lineage. To this end, we have in addition to previously studied genomes of plant species, identified and analyzed the Ca(2+)-signaling components from species that hold key evolutionary positions like the filamentous terrestrial algae Klebsormidium flaccidum and Amborella trichopoda, the single living representative of the sister lineage to all other extant flowering plants. Plants and animals exhibit substantial differences in their complements of Ca(2+) channels and Ca(2+) binding proteins. Within the plant lineage, remarkable differences in the evolution of complexity between different families of Ca(2+) signaling proteins are observable. Using the CBL/CIPK Ca(2+) sensor/kinase signaling network as model, we attempt to link evolutionary tendencies to functional predictions. Our analyses, for example, suggest Ca(2+) dependent regulation of Na(+) homeostasis as an evolutionary most ancient function of this signaling network. Overall, gene families of Ca(2+) signaling proteins have significantly increased in their size during plant evolution reaching an extraordinary complexity in angiosperms.
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Affiliation(s)
- Kai H Edel
- Institut für Biologie und Biotechnologie der Pflanzen, Universität Münster, Schlossplatz 4, 48149 Münster, Germany.
| | - Jörg Kudla
- Institut für Biologie und Biotechnologie der Pflanzen, Universität Münster, Schlossplatz 4, 48149 Münster, Germany; College of Science, King Saud University, Riyadh 11451, Kingdom of Saudi Arabia.
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