1
|
Khan A, Cheng J, Kitashova A, Fürtauer L, Nägele T, Picco C, Scholz-Starke J, Keller I, Neuhaus HE, Pommerrenig B. Vacuolar sugar transporter EARLY RESPONSE TO DEHYDRATION6-LIKE4 affects fructose signaling and plant growth. PLANT PHYSIOLOGY 2023; 193:2141-2163. [PMID: 37427783 DOI: 10.1093/plphys/kiad403] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2023] [Revised: 06/02/2023] [Accepted: 06/11/2023] [Indexed: 07/11/2023]
Abstract
Regulation of intracellular sugar homeostasis is maintained by regulation of activities of sugar import and export proteins residing at the tonoplast. We show here that the EARLY RESPONSE TO DEHYDRATION6-LIKE4 (ERDL4) protein, a member of the monosaccharide transporter family, resides in the vacuolar membrane in Arabidopsis (Arabidopsis thaliana). Gene expression and subcellular fractionation studies indicated that ERDL4 participates in fructose allocation across the tonoplast. Overexpression of ERDL4 increased total sugar levels in leaves due to a concomitantly induced stimulation of TONOPLAST SUGAR TRANSPORTER 2 (TST2) expression, coding for the major vacuolar sugar loader. This conclusion is supported by the finding that tst1-2 knockout lines overexpressing ERDL4 lack increased cellular sugar levels. ERDL4 activity contributing to the coordination of cellular sugar homeostasis is also indicated by 2 further observations. First, ERDL4 and TST genes exhibit an opposite regulation during a diurnal rhythm, and second, the ERDL4 gene is markedly expressed during cold acclimation, representing a situation in which TST activity needs to be upregulated. Moreover, ERDL4-overexpressing plants show larger rosettes and roots, a delayed flowering time, and increased total seed yield. Consistently, erdl4 knockout plants show impaired cold acclimation and freezing tolerance along with reduced plant biomass. In summary, we show that modification of cytosolic fructose levels influences plant organ development and stress tolerance.
Collapse
Affiliation(s)
- Azkia Khan
- Plant Physiology, RPTU Kaiserslautern-Landau, Paul-Ehrlich Straße 22, D-67653 Kaiserslautern, Germany
| | - Jintao Cheng
- College of Horticulture and Forestry Sciences, Huazhong Agricultural University and Key Laboratory of Horticultural Plant Biology, Ministry of Education, Wuhan 430070, China
| | - Anastasia Kitashova
- Plant Evolutionary Cell Biology, Faculty of Biology, Ludwig-Maximilians- Universität München, D-82152 Planegg-Martinsried, Germany
| | - Lisa Fürtauer
- Institute for Biology III, Unit of Plant Molecular Systems Biology, RWTH Aachen University, Aachen, Germany
| | - Thomas Nägele
- Plant Evolutionary Cell Biology, Faculty of Biology, Ludwig-Maximilians- Universität München, D-82152 Planegg-Martinsried, Germany
| | - Cristiana Picco
- Institute of Biophysics, Consiglio Nazionale delle Ricerche (CNR), Via De Marini 6, I-16149 Genova, Italy
| | - Joachim Scholz-Starke
- Institute of Biophysics, Consiglio Nazionale delle Ricerche (CNR), Via De Marini 6, I-16149 Genova, Italy
| | - Isabel Keller
- Plant Physiology, RPTU Kaiserslautern-Landau, Paul-Ehrlich Straße 22, D-67653 Kaiserslautern, Germany
| | - H Ekkehard Neuhaus
- Plant Physiology, RPTU Kaiserslautern-Landau, Paul-Ehrlich Straße 22, D-67653 Kaiserslautern, Germany
| | - Benjamin Pommerrenig
- Plant Physiology, RPTU Kaiserslautern-Landau, Paul-Ehrlich Straße 22, D-67653 Kaiserslautern, Germany
| |
Collapse
|
2
|
Kalaipandian S, Xue GP, Rae AL, Glassop D, Bonnett GD, McIntyre LC. Overexpression of TaCML20, a calmodulin-like gene, enhances water soluble carbohydrate accumulation and yield in wheat. PHYSIOLOGIA PLANTARUM 2019; 165:790-799. [PMID: 29900558 DOI: 10.1111/ppl.12786] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2018] [Revised: 05/23/2018] [Accepted: 06/09/2018] [Indexed: 05/10/2023]
Abstract
Calcium (Ca2+ ) is a universal messenger that mediates intracellular responses to extracellular stimuli in living organisms. Calmodulin (CaM) and calmodulin-like (CML) proteins are the important Ca2+ sensors in plants that decode Ca2+ -signatures to execute downstream intracellular level responses. Several studies indicate the interlinking of Ca2+ and sugar signaling in plants; however, no genes have been functionally characterized to provide molecular evidence. Our study found that expression of TaCML20 was significantly correlated with water soluble carbohydrate (WSC) concentrations in recombinant inbred lines in wheat. TaCML20 has four EF-hand motifs that may facilitate the binding of Ca2+ . To explore the role of CML20, we generated TaCML20 overexpressing transgenic lines in wheat. These lines accumulated higher WSC concentrations in the shoots, and we also found a significantly increased transcript level of sucrose:sucrose-1-fructosyltransferase (1-SST) in the internodes compared with the control plants. In addition, TaCML20 overexpressing plants showed significantly increased tillers per plant and also increased about 19% of grain weight per plant compared with control plants. The results also suggested a role for TaCML20 in drought stress, as its transcripts significantly increased in the shoots of wild-type plants under water deficit. These results uncovered the role of CML20 in determining multiple traits in wheat.
Collapse
Affiliation(s)
| | - Gang-Ping Xue
- CSIRO Agriculture and Food, St. Lucia, Queensland, 4067, Australia
| | - Anne L Rae
- CSIRO Agriculture and Food, St. Lucia, Queensland, 4067, Australia
| | - Donna Glassop
- CSIRO Agriculture and Food, St. Lucia, Queensland, 4067, Australia
| | - Graham D Bonnett
- CSIRO Agriculture and Food, St. Lucia, Queensland, 4067, Australia
| | - Lynne C McIntyre
- CSIRO Agriculture and Food, St. Lucia, Queensland, 4067, Australia
| |
Collapse
|
3
|
Sami F, Siddiqui H, Hayat S. Interaction of glucose and phytohormone signaling in plants. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2019; 135:119-126. [PMID: 30529977 DOI: 10.1016/j.plaphy.2018.11.005] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2018] [Revised: 10/31/2018] [Accepted: 11/06/2018] [Indexed: 05/23/2023]
Abstract
Energy acts as a primary prerequisite for plant growth like all the other organisms. Soluble sugars function in providing enough supply of nutrients which further helps in building macromolecules and energy to carry out specific and coordinated development. Sugars functions as nutrient as well as signaling molecule to promote cell division and differentiation in plants. Intriguingly, glucose has emerged as a crucial signaling molecule where hexokinase1 acts as the conserved glucose sensor. On the molecular scale, an extensive crosstalk between glucose and phytohormone signaling has been observed where glucose signals trigger multiple hexokinase1-dependent as well as hexokinase1-independent pathways to mediate diverse developmental, physiological and molecular mechanisms. Taken together, these findings this review focused on the glucose crosstalk with several classical plant hormonal-signaling pathways and the crucial role of hexokinase1 in modulating plant physiological processes.
Collapse
Affiliation(s)
- Fareen Sami
- Plant Physiology Section, Department of Botany, Aligarh Muslim University, Aligarh, 202002, India
| | - Husna Siddiqui
- Plant Physiology Section, Department of Botany, Aligarh Muslim University, Aligarh, 202002, India
| | - Shamsul Hayat
- Plant Physiology Section, Department of Botany, Aligarh Muslim University, Aligarh, 202002, India.
| |
Collapse
|
4
|
Yasuda S, Aoyama S, Hasegawa Y, Sato T, Yamaguchi J. Arabidopsis CBL-Interacting Protein Kinases Regulate Carbon/Nitrogen-Nutrient Response by Phosphorylating Ubiquitin Ligase ATL31. MOLECULAR PLANT 2017; 10:605-618. [PMID: 28111287 DOI: 10.1016/j.molp.2017.01.005] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2016] [Revised: 01/03/2017] [Accepted: 01/10/2017] [Indexed: 05/20/2023]
Abstract
In response to the ratio of available carbon (C) and nitrogen (N) nutrients, plants regulate their metabolism, growth, and development, a process called the C/N-nutrient response. However, the molecular basis of C/N-nutrient signaling remains largely unclear. In this study, we identified three CALCINEURIN B-LIKE (CBL)-INTERACTING PROTEIN KINASES (CIPKs), CIPK7, CIPK12, and CIPK14, as key regulators of the C/N-nutrient response during the post-germination growth in Arabidopsis. Single-knockout mutants of CIPK7, CIPK12, and CIPK14 showed hypersensitivity to high C/low N conditions, which was enhanced in their triple-knockout mutant, indicating that they play a negative role and at least partly function redundantly in the C/N-nutrient response. Moreover, these CIPKs were found to regulate the function of ATL31, a ubiquitin ligase involved in the C/N-nutrient response via the phosphorylation-dependent ubiquitination and proteasomal degradation of 14-3-3 proteins. CIPK7, CIPK12, and CIPK14 physically interacted with ATL31, and CIPK14, acting with CBL8, directly phosphorylated ATL31 in a Ca2+-dependent manner. Further analyses showed that these CIPKs are required for ATL31 phosphorylation and stabilization, which mediates the degradation of 14-3-3 proteins in response to C/N-nutrient conditions. These findings provide new insights into C/N-nutrient signaling mediated by protein phosphorylation.
Collapse
Affiliation(s)
- Shigetaka Yasuda
- Faculty of Science and Graduate School of Life Science, Hokkaido University, Sapporo 060-0810, Japan
| | - Shoki Aoyama
- Faculty of Science and Graduate School of Life Science, Hokkaido University, Sapporo 060-0810, Japan
| | - Yoko Hasegawa
- Faculty of Science and Graduate School of Life Science, Hokkaido University, Sapporo 060-0810, Japan
| | - Takeo Sato
- Faculty of Science and Graduate School of Life Science, Hokkaido University, Sapporo 060-0810, Japan.
| | - Junji Yamaguchi
- Faculty of Science and Graduate School of Life Science, Hokkaido University, Sapporo 060-0810, Japan
| |
Collapse
|
5
|
Hu T, Chen K, Hu L, Amombo E, Fu J. H 2O 2 and Ca 2+-based signaling and associated ion accumulation, antioxidant systems and secondary metabolism orchestrate the response to NaCl stress in perennial ryegrass. Sci Rep 2016; 6:36396. [PMID: 27805022 PMCID: PMC5090991 DOI: 10.1038/srep36396] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2016] [Accepted: 10/13/2016] [Indexed: 12/31/2022] Open
Abstract
Little is known about the interplay between Ca2+ and H2O2 signaling in stressed cool-season turfgrass. To understand better how Ca2+ and H2O2 signals are integrated to enhance grass acclimation to stress conditions, we analyzed the rearrangements of endogenous ion accumulation, antioxidant systems and secondary metabolism in roots, stems and leaves of perennial ryegrass (Lolium perenne L.) treated with exogenous Ca2+ and H2O2 under salinity. Ca2+ signaling remarkably enhanced the physiological response to salt conditions. Ca2+ signaling could maintain ROS homeostasis in stressed grass by increasing the responses of antioxidant genes, proteins and enzymes. H2O2 signaling could activate ROS homeostasis by inducing antioxidant genes but weakened Ca2+ signaling in leaves. Furthermore, the metabolic profiles revealed that sugars and sugar alcohol accounted for 49.5-88.2% of all metabolites accumulation in all treated leaves and roots. However, the accumulation of these sugars and sugar alcohols displayed opposing trends between Ca2+ and H2O2 application in salt-stressed plants, which suggests that these metabolites are the common regulatory factor for Ca2+ and H2O2 signals. These findings assist in understanding better the integrated network in Ca2+ and H2O2 of cool-season turfgrass' response to salinity.
Collapse
Affiliation(s)
- Tao Hu
- Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Science, Wuhan 430074, Hubei, P.R. China
- Sino-Africa Joint Research Center, Chinese Academy of Science, Wuhan 430074, Hubei, P.R. China
| | - Ke Chen
- Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Science, Wuhan 430074, Hubei, P.R. China
- Sino-Africa Joint Research Center, Chinese Academy of Science, Wuhan 430074, Hubei, P.R. China
| | - Longxing Hu
- Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Science, Wuhan 430074, Hubei, P.R. China
- Sino-Africa Joint Research Center, Chinese Academy of Science, Wuhan 430074, Hubei, P.R. China
| | - Erick Amombo
- Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Science, Wuhan 430074, Hubei, P.R. China
- Sino-Africa Joint Research Center, Chinese Academy of Science, Wuhan 430074, Hubei, P.R. China
| | - Jinmin Fu
- Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Science, Wuhan 430074, Hubei, P.R. China
- Sino-Africa Joint Research Center, Chinese Academy of Science, Wuhan 430074, Hubei, P.R. China
| |
Collapse
|
6
|
Valluru R. Fructan and hormone connections. FRONTIERS IN PLANT SCIENCE 2015; 6:180. [PMID: 25852727 PMCID: PMC4369654 DOI: 10.3389/fpls.2015.00180] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2015] [Accepted: 03/05/2015] [Indexed: 05/22/2023]
|
7
|
Lee EJ, Iai H, Sano H, Koizumi N. Sugar Responsible and Tissue Specific Expression of a Gene Encoding AtCIPK14, anArabidopsisCBL-Interacting Protein Kinase. Biosci Biotechnol Biochem 2014; 69:242-5. [PMID: 15665497 DOI: 10.1271/bbb.69.242] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Expression of AtCIPK14 (an Arabidopsis CBL-interacting protein kinase 14) was induced by metabolic sugars. Two A/T-rich sequences similar to elements involved in sugar-inducible expression of other genes were found within the -183 bp 5' region of the AtCIPK14 promoter that was responsible for the sugar induction. Histochemical analysis using a reporter gene indicated vascular-specific expression of AtCIPK14.
Collapse
Affiliation(s)
- Eun-Jeong Lee
- Research and Education Center for Genetic Information, Nara Institute of Science and Technology, Nara, Japan
| | | | | | | |
Collapse
|
8
|
Schönknecht G. Calcium Signals from the Vacuole. PLANTS (BASEL, SWITZERLAND) 2013; 2:589-614. [PMID: 27137394 PMCID: PMC4844392 DOI: 10.3390/plants2040589] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/19/2013] [Revised: 09/21/2013] [Accepted: 09/26/2013] [Indexed: 01/13/2023]
Abstract
The vacuole is by far the largest intracellular Ca(2+) store in most plant cells. Here, the current knowledge about the molecular mechanisms of vacuolar Ca(2+) release and Ca(2+) uptake is summarized, and how different vacuolar Ca(2+) channels and Ca(2+) pumps may contribute to Ca(2+) signaling in plant cells is discussed. To provide a phylogenetic perspective, the distribution of potential vacuolar Ca(2+) transporters is compared for different clades of photosynthetic eukaryotes. There are several candidates for vacuolar Ca(2+) channels that could elicit cytosolic [Ca(2+)] transients. Typical second messengers, such as InsP₃ and cADPR, seem to trigger vacuolar Ca(2+) release, but the molecular mechanism of this Ca(2+) release still awaits elucidation. Some vacuolar Ca(2+) channels have been identified on a molecular level, the voltage-dependent SV/TPC1 channel, and recently two cyclic-nucleotide-gated cation channels. However, their function in Ca(2+) signaling still has to be demonstrated. Ca(2+) pumps in addition to establishing long-term Ca(2+) homeostasis can shape cytosolic [Ca(2+)] transients by limiting their amplitude and duration, and may thus affect Ca(2+) signaling.
Collapse
Affiliation(s)
- Gerald Schönknecht
- Department of Botany, Oklahoma State University, Stillwater, OK 74078, USA.
| |
Collapse
|
9
|
Scala A, Allmann S, Mirabella R, Haring MA, Schuurink RC. Green leaf volatiles: a plant's multifunctional weapon against herbivores and pathogens. Int J Mol Sci 2013; 14:17781-811. [PMID: 23999587 PMCID: PMC3794753 DOI: 10.3390/ijms140917781] [Citation(s) in RCA: 237] [Impact Index Per Article: 21.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2013] [Revised: 08/06/2013] [Accepted: 08/13/2013] [Indexed: 12/27/2022] Open
Abstract
Plants cannot avoid being attacked by an almost infinite number of microorganisms and insects. Consequently, they arm themselves with molecular weapons against their attackers. Plant defense responses are the result of a complex signaling network, in which the hormones jasmonic acid (JA), salicylic acid (SA) and ethylene (ET) are the usual suspects under the magnifying glass when researchers investigate host-pest interactions. However, Green Leaf Volatiles (GLVs), C6 molecules, which are very quickly produced and/or emitted upon herbivory or pathogen infection by almost every green plant, also play an important role in plant defenses. GLVs are semiochemicals used by insects to find their food or their conspecifics. They have also been reported to be fundamental in indirect defenses and to have a direct effect on pests, but these are not the only roles of GLVs. These volatiles, being probably one of the fastest weapons exploited, are also able to directly elicit or prime plant defense responses. Moreover, GLVs, via crosstalk with phytohormones, mostly JA, can influence the outcome of the plant’s defense response against pathogens. For all these reasons GLVs should be considered as co-protagonists in the play between plants and their attackers.
Collapse
Affiliation(s)
| | | | | | | | - Robert C. Schuurink
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +31-20-5257-933; Fax: +31-20-5257-934
| |
Collapse
|
10
|
Li ZY, Xu ZS, Chen Y, He GY, Yang GX, Chen M, Li LC, Ma YZ. A novel role for Arabidopsis CBL1 in affecting plant responses to glucose and gibberellin during germination and seedling development. PLoS One 2013; 8:e56412. [PMID: 23437128 PMCID: PMC3577912 DOI: 10.1371/journal.pone.0056412] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2012] [Accepted: 01/09/2013] [Indexed: 01/28/2023] Open
Abstract
Glucose and phytohormones such as abscisic acid (ABA), ethylene, and gibberellin (GA) coordinately regulate germination and seedling development. However, there is still inadequate evidence to link their molecular roles in affecting plant responses. Calcium acts as a second messenger in a diverse range of signal transduction pathways. As calcium sensors unique to plants, calcineurin B-like (CBL) proteins are well known to modulate abiotic stress responses. In this study, it was found that CBL1 was induced by glucose in Arabidopsis. Loss-of-function mutant cbl1 exhibited hypersensitivity to glucose and paclobutrazol, a GA biosynthetic inhibitor. Several sugar-responsive and GA biosynthetic gene expressions were altered in the cbl1 mutant. CBL1 protein physically interacted with AKINβ1, the regulatory β subunit of the SnRK1 complex which has a central role in sugar signaling. Our results indicate a novel role for CBL1 in modulating responses to glucose and GA signals.
Collapse
Affiliation(s)
- Zhi-Yong Li
- Institute of Crop Science, Chinese Academy of Agricultural Sciences (CAAS)/National Key Facility for Crop Gene Resources and Genetic Improvement, Key Laboratory of Biology and Genetic Improvement of Triticeae Crops, Ministry of Agriculture, Beijing, China
- The Genetic Engineering International Cooperation Base of Chinese Ministry of Science and Technology, Chinese National Center of Plant Gene Research (Wuhan) HUST Part, College of Life Science and Technology, Huazhong University of Science & Technology (HUST), Wuhan, China
| | - Zhao-Shi Xu
- Institute of Crop Science, Chinese Academy of Agricultural Sciences (CAAS)/National Key Facility for Crop Gene Resources and Genetic Improvement, Key Laboratory of Biology and Genetic Improvement of Triticeae Crops, Ministry of Agriculture, Beijing, China
- * E-mail: (Z-SX); (Y-ZM); (YC)
| | - Yang Chen
- Institute of Crop Science, Chinese Academy of Agricultural Sciences (CAAS)/National Key Facility for Crop Gene Resources and Genetic Improvement, Key Laboratory of Biology and Genetic Improvement of Triticeae Crops, Ministry of Agriculture, Beijing, China
- * E-mail: (Z-SX); (Y-ZM); (YC)
| | - Guang-Yuan He
- The Genetic Engineering International Cooperation Base of Chinese Ministry of Science and Technology, Chinese National Center of Plant Gene Research (Wuhan) HUST Part, College of Life Science and Technology, Huazhong University of Science & Technology (HUST), Wuhan, China
| | - Guang-Xiao Yang
- The Genetic Engineering International Cooperation Base of Chinese Ministry of Science and Technology, Chinese National Center of Plant Gene Research (Wuhan) HUST Part, College of Life Science and Technology, Huazhong University of Science & Technology (HUST), Wuhan, China
| | - Ming Chen
- Institute of Crop Science, Chinese Academy of Agricultural Sciences (CAAS)/National Key Facility for Crop Gene Resources and Genetic Improvement, Key Laboratory of Biology and Genetic Improvement of Triticeae Crops, Ministry of Agriculture, Beijing, China
| | - Lian-Cheng Li
- Institute of Crop Science, Chinese Academy of Agricultural Sciences (CAAS)/National Key Facility for Crop Gene Resources and Genetic Improvement, Key Laboratory of Biology and Genetic Improvement of Triticeae Crops, Ministry of Agriculture, Beijing, China
| | - You-Zhi Ma
- Institute of Crop Science, Chinese Academy of Agricultural Sciences (CAAS)/National Key Facility for Crop Gene Resources and Genetic Improvement, Key Laboratory of Biology and Genetic Improvement of Triticeae Crops, Ministry of Agriculture, Beijing, China
- * E-mail: (Z-SX); (Y-ZM); (YC)
| |
Collapse
|
11
|
Shin DH, Choi MG, Lee HK, Cho M, Choi SB, Choi G, Park YI. Calcium dependent sucrose uptake links sugar signaling to anthocyanin biosynthesis in Arabidopsis. Biochem Biophys Res Commun 2012; 430:634-9. [PMID: 23220235 DOI: 10.1016/j.bbrc.2012.11.100] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2012] [Accepted: 11/25/2012] [Indexed: 10/27/2022]
Abstract
Sugars enhance light signaling-induced anthocyanin accumulation in Arabidopsis seedlings via differential regulation of several positive and negative transcription factors. Ca(2+) plays a role as a second messenger in sugar signaling in grape and wheat. However, whether anthocyanin pigmentation is modulated by changes in intracellular Ca(2+) level in Arabidopsis is not known. Here, we used a pharmaceutical approach that Ca(2+) antagonists strongly interfered with sucrose uptake and anthocyanin accumulation by downregulating the expression of sucrose transporter 1 (SUC1) and transcriptional regulatory factors, such as PAP1. Time course analysis of the effect of Ca(2+) antagonists showed the early inhibition of sucrose-induced sugar uptake leading to decreased anthocyanin accumulation, indicating that Ca(2+) signals play a role in sugar uptake rather than in anthocyanin biosynthesis. An early increase in cytosolic Ca(2+) level in Arabidopsis roots in response to sucrose feeding was significantly inhibited by Ca(2+) antagonists. Taken together, these results indicate that sucrose-induced sugar uptake in Arabidopsis is modulated by changes in endogenous Ca(2+) levels, which in turn regulate anthocyanin accumulation.
Collapse
Affiliation(s)
- Dong Ho Shin
- Department of Biological Sciences, Chungnam National University, Daejeon 305-764, Republic of Korea
| | | | | | | | | | | | | |
Collapse
|
12
|
Li L, Li Y, Zhang L, Xu C, Su T, Ren D, Yang H. Sucrose induces rapid activation of CfSAPK, a mitogen-activated protein kinase, in Cephalostachyum fuchsianum Gamble cells. PLANT, CELL & ENVIRONMENT 2012; 35:1428-1439. [PMID: 22376201 DOI: 10.1111/j.1365-3040.2012.02500.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Sucrose was recently demonstrated to function as a molecular signal. However, sucrose-specific sensing and signalling pathways remain largely undefined. Here, we show that Cephalostachyum fuchsianum sucrose-activated protein kinase (CfSAPK) is transiently and specifically activated by sucrose in C. fuchsianum Gamble suspension cells. The result suggested that CfSAPK participates in a sucrose-signalling pathway. CfSAPK was partially purified from sucrose-treated cells and further analysed. Kinase activity assays revealed that CfSAPK preferentially used myelin basic protein (MBP) as substrate in vitro and strongly phosphorylate MBP threonine residue(s) and weakly phosphorylated MBP serine residue(s). Of the divalent cations tested, Mg(2+) was required for CfSAPK activation. Phosphatase treatment of CfSAPK abolished its kinase activity, indicating that phosphorylation is required for CfSAPK activation. Seven internal tryptic peptides identified from CfSAPK matched mitogen-activated protein kinases (MAPKs) in plants. CfSAPK cDNA was cloned using RT-PCR and rapid amplification of cDNA ends (RACE). CfSAPK cDNA encodes a 382-amino acid protein with a calculated molecular mass of 43,466.9 Da. The CfSAPK protein contains all 11 conserved kinase subdomains found in other Ser/Thr kinases. The amino acids sequence of CfSAPK is highly homologous to group A MAPKs in monocotyledon plants.
Collapse
Affiliation(s)
- Lubin Li
- State Key Laboratory of Tree Genetics and Breeding, Research Institute of Forestry, Chinese Academy of Forestry, Beijing 100091, China
| | | | | | | | | | | | | |
Collapse
|
13
|
Arabidopsis calcium-binding mitochondrial carrier proteins as potential facilitators of mitochondrial ATP-import and plastid SAM-import. FEBS Lett 2011; 585:3935-40. [PMID: 22062157 DOI: 10.1016/j.febslet.2011.10.039] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2011] [Revised: 10/06/2011] [Accepted: 10/23/2011] [Indexed: 11/20/2022]
Abstract
Chloroplasts and mitochondria are central to crucial cellular processes in plants and contribute to a whole range of metabolic pathways. The use of calcium ions as a secondary messenger in and around organelles is increasingly appreciated as an important mediator of plant cell signaling, enabling plants to develop or to acclimatize to changing environmental conditions. Here, we have studied the four calcium-dependent mitochondrial carriers that are encoded in the Arabidopsis genome. An unknown substrate carrier, which was previously found to localize to chloroplasts, is proposed to present a calcium-dependent S-adenosyl methionine carrier. For three predicted ATP/phosphate carriers, we present experimental evidence that they can function as mitochondrial ATP-importers.
Collapse
|
14
|
Analysis of calcium signaling pathways in plants. Biochim Biophys Acta Gen Subj 2011; 1820:1283-93. [PMID: 22061997 DOI: 10.1016/j.bbagen.2011.10.012] [Citation(s) in RCA: 213] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2011] [Revised: 10/19/2011] [Accepted: 10/21/2011] [Indexed: 11/20/2022]
Abstract
BACKGROUND Calcium serves as a versatile messenger in many adaptation and developmental processes in plants. Ca2+ signals are represented by stimulus-specific spatially and temporally defined Ca2+ signatures. These Ca2+ signatures are detected, decoded and transmitted to downstream responses by a complex toolkit of Ca2+ binding proteins that function as Ca2+ sensors. SCOPE OF REVIEW This review will reflect on advancements in monitoring Ca2+ dynamics in plants. Moreover, it will provide insights in the extensive and complex toolkit of plant Ca2+ sensor proteins that relay the information presented in the Ca2+ signatures into phosphorylation events, changes in protein-protein interaction or regulation of gene expression. MAJOR CONCLUSIONS Plants' response to signals is encoded by different Ca2+ signatures. The plant decoding Ca2+ toolkit encompasses different families of Ca2+ sensors like Calmodulins (CaM), Calmodulin-like proteins (CMLs), Ca2+-dependent protein kinases (CDPKs), Calcineurin B-like proteins (CBLs) and their interacting kinases (CIPKs). These Ca2+ sensors are encoded by complex gene families and form intricate signaling networks in plants that enable specific, robust and flexible information processing. GENERAL SIGNIFICANCE This review provides new insights about the biochemical regulation, physiological functions and of newly identified target proteins of the major plant Ca2+ sensor families. This article is part of a Special Issue entitled Biochemical, biophysical and genetic approaches to intracellular calcium signaling.
Collapse
|
15
|
Suzuki–Miyaura coupling for general synthesis of dehydrocoelenterazine applicable for 6-position analogs directing toward bioluminescence studies. Tetrahedron 2011. [DOI: 10.1016/j.tet.2010.12.001] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
16
|
Webb SE, Rogers KL, Karplus E, Miller AL. The use of aequorins to record and visualize Ca(2+) dynamics: from subcellular microdomains to whole organisms. Methods Cell Biol 2010; 99:263-300. [PMID: 21035690 DOI: 10.1016/b978-0-12-374841-6.00010-4] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
In this chapter, we describe the practical aspects of measuring [Ca(2+)] transients that are generated in a particular cytoplasmic domain, or within a specific organelle or its periorganellar environment, using bioluminescent, genetically encoded and targeted Ca(2+) reporters, especially those based on apoaequorin. We also list examples of the organisms, tissues, and cells that have been transfected with apoaequorin or an apoaequorin-BRET complex, as well as of the organelles and subcellular domains that have been specifically targeted with these bioluminescent Ca(2+) reporters. In addition, we summarize the various techniques used to load the apoaequorin cofactor, coelenterazine, and its analogs into cells, tissues, and intact organisms, and we describe recent advances in the detection and imaging technologies that are currently being used to measure and visualize the luminescence generated by the aequorin-Ca(2+) reaction within these various cytoplasmic domains and subcellular compartments.
Collapse
Affiliation(s)
- Sarah E Webb
- Biochemistry and Cell Biology Section and State Key Laboratory of Molecular Neuroscience, Division of Life Science, HKUST, Clear Water Bay, Kowloon, Hong Kong, PR China
| | | | | | | |
Collapse
|
17
|
Photosynthesis and Related Physiological Characteristics Affected byExogenous Glucose in Wheat Seedlin Gs under Water S Tress. ZUOWU XUEBAO 2009. [DOI: 10.3724/sp.j.1006.2009.00724] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
18
|
Asai N, Nishioka T, Takabayashi J, Furuichi T. Plant volatiles regulate the activities of Ca2+ -permeable channels and promote cytoplasmic calcium transients in Arabidopsis leaf cells. PLANT SIGNALING & BEHAVIOR 2009; 4:294-300. [PMID: 19794844 PMCID: PMC2664488 DOI: 10.4161/psb.4.4.8275] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2009] [Accepted: 02/24/2009] [Indexed: 05/18/2023]
Abstract
A variety of plant species emit volatile compounds in response to mechanical stresses such as herbivore attack. Although these volatile compounds promote gene expression leading to anti-herbivore responses, the underlying transduction mechanisms are largely unknown. While indirect evidence suggests that the cytoplasmic free Ca(2+) concentration ([Ca(2+)](c)) plays a crucial role in the volatile-sensing mechanisms in plants, these roles have not been directly demonstrated. In the present study, we used Arabidopsis leaves expressing apoaequorin, a Ca(2+)-sensitive luminescent protein, in combination with a luminometer, to monitor [Ca(2+)](c) transients that occur in response to a variety of volatile compounds and to characterized the pharmacological properties of the increase in [Ca(2+)](c). When leaves were exposed to volatiles, [Ca(2+)](c) was transiently raised. The [Ca(2+)](c) increases induced by acyclic compounds were disrupted by Ruthenium Red, a potential plasma-membrane and endo-membrane Ca(2+)-permeable channel inhibitor, but not by 1,2-bis(2-aminophenoxy) ethane-N,N,N',N'-tetraacetic acid (BAPTA), an extracellular Ca(2+)-chelator, suggesting that acyclic compounds promote Ca(2+)-release from intracellular stores. On the other hand, the electrophilic compound (E)-2-hexenal promoted Ca(2+)-influx via ROS production by natural oxidation at the aquarius phase. In a gpa1-2 mutant lacking a canonical Galpha subunit, the [Ca(2+)](c) transients induced by all tested volatiles were not attenuated, suggesting that G-protein coupled receptors are not involved in the volatile-induced [Ca(2+)](c) transients in Arabidopsis leaves.
Collapse
Affiliation(s)
- Naoko Asai
- Core Research for Evolutional Science and Technology (CREST); Japan Science and Technology Corporation; Kawaguchi, Saitama Japan; Division of Applied Bioscience; Faculty of Agriculture; Center for Ecological Research; Kyoto University; Sakyo, Kyoto Japan; Institute for Advanced Biosciences; Keio University; Tsuruoka, Yamagata Japan; Graduate School of Medicine; Nagoya University; Nagoya, Japan; Research institute for Bioresources; Okayama Univerisity; Kurashiki, Japan
| | - Takaaki Nishioka
- Core Research for Evolutional Science and Technology (CREST); Japan Science and Technology Corporation; Kawaguchi, Saitama Japan; Division of Applied Bioscience; Faculty of Agriculture; Center for Ecological Research; Kyoto University; Sakyo, Kyoto Japan; Institute for Advanced Biosciences; Keio University; Tsuruoka, Yamagata Japan; Graduate School of Medicine; Nagoya University; Nagoya, Japan; Research institute for Bioresources; Okayama Univerisity; Kurashiki, Japan
| | - Junji Takabayashi
- Core Research for Evolutional Science and Technology (CREST); Japan Science and Technology Corporation; Kawaguchi, Saitama Japan; Division of Applied Bioscience; Faculty of Agriculture; Center for Ecological Research; Kyoto University; Sakyo, Kyoto Japan; Institute for Advanced Biosciences; Keio University; Tsuruoka, Yamagata Japan; Graduate School of Medicine; Nagoya University; Nagoya, Japan; Research institute for Bioresources; Okayama Univerisity; Kurashiki, Japan
| | - Takuya Furuichi
- Core Research for Evolutional Science and Technology (CREST); Japan Science and Technology Corporation; Kawaguchi, Saitama Japan; Division of Applied Bioscience; Faculty of Agriculture; Center for Ecological Research; Kyoto University; Sakyo, Kyoto Japan; Institute for Advanced Biosciences; Keio University; Tsuruoka, Yamagata Japan; Graduate School of Medicine; Nagoya University; Nagoya, Japan; Research institute for Bioresources; Okayama Univerisity; Kurashiki, Japan
| |
Collapse
|
19
|
Abstract
Plants, restricted by their environment, need to integrate a wide variety of stimuli with their metabolic activity, growth and development. Sugars, generated by photosynthetic carbon fixation, are central in coordinating metabolic fluxes in response to the changing environment and in providing cells and tissues with the necessary energy for continued growth and survival. A complex network of metabolic and hormone signaling pathways are intimately linked to diverse sugar responses. A combination of genetic, cellular and systems analyses have uncovered nuclear HXK1 (hexokinase1) as a pivotal and conserved glucose sensor, directly mediating transcription regulation, while the KIN10/11 energy sensor protein kinases function as master regulators of transcription networks under sugar and energy deprivation conditions. The involvement of disaccharide signals in the regulation of specific cellular processes and the potential role of cell surface receptors in mediating sugar signals add to the complexity. This chapter gives an overview of our current insight in the sugar sensing and signaling network and describes some of the molecular mechanisms involved.
Collapse
Affiliation(s)
- Matthew Ramon
- Department of Molecular Biology, Massachusetts General Hospital, Department of Genetics, Harvard Medical School, Boston, Massachusetts 02114
| | - Filip Rolland
- Department of Biology, Institute of Botany and Microbiology, K.U. Leuven, Kasteelpark Arenberg 31, 3001, Heverlee, Belgium
| | - Jen Sheen
- Department of Molecular Biology, Massachusetts General Hospital, Department of Genetics, Harvard Medical School, Boston, Massachusetts 02114
| |
Collapse
|
20
|
Furuichi T, Kawano T, Tatsumi H, Sokabe M. Roles of Ion Channels in the Environmental Responses of Plants. SENSING WITH ION CHANNELS 2008. [DOI: 10.1007/978-3-540-72739-2_3] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
|
21
|
Martínez-Noël G, Nagaraj VJ, Caló G, Wiemken A, Pontis HG. Sucrose regulated expression of a Ca2+-dependent protein kinase (TaCDPK1) gene in excised leaves of wheat. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2007; 45:410-9. [PMID: 17482472 DOI: 10.1016/j.plaphy.2007.03.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2007] [Accepted: 03/05/2007] [Indexed: 05/15/2023]
Abstract
Sucrose (Suc) can influence the expression of a large number of genes and thereby regulates many metabolic and developmental processes. However, the Suc sensing and the components of the ensuing signaling transduction pathway leading to the regulation of gene expression are not fully understood. We have shown that protein kinases and phosphatases are involved in the Suc induced expression of fructosyltransferase (FT) genes and fructan accumulation by an hexokinase independent pathway in wheat (Triticum aestivum). In the present study, using an RT-PCR based strategy, we have cloned a calcium-dependent protein kinase (TaCDPK1) cDNA that is upregulated during Suc treatment of excised wheat leaves. The deduced amino-acid sequence of CDPK1 has high sequence similarity (>70%) to known CDPKs from both monocots and dicots. Based on sequence homology, TaCDPK1 sequence shows a variable domain preceding a catalytic domain, an autoinhibitory function domain, and a C-terminal calmodulin-domain containing 4 EF-hand calcium-binding motifs, along with a N-myristoylation motif in the N-terminal variable domain. The recombinant Escherichia coli expressed TaCDPK1 was able to phosphorylate histone III-S in a calcium dependent manner in in vitro assays. The TaCDPK1 gene expression, as determined by quantitative RT-PCR, is induced by Suc and this effect is repressed by the inhibitors of the putative components of the Suc signal transduction pathway (calcium, Ser/Thr protein kinases and protein phosphatases). We propose that TaCDPK1 is involved in the Suc induced signaling pathway in wheat leaves.
Collapse
Affiliation(s)
- Giselle Martínez-Noël
- Centro de Investigaciones Biológicas, Fundación para Investigaciones Biológicas Aplicadas (FIBA), Vieytes 3103, 7600 Mar del Plata, Argentina.
| | | | | | | | | |
Collapse
|
22
|
Martínez-Noël G, Tognetti J, Nagaraj V, Wiemken A, Pontis H. Calcium is essential for fructan synthesis induction mediated by sucrose in wheat. PLANTA 2006; 225:183-91. [PMID: 16835761 DOI: 10.1007/s00425-006-0339-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2006] [Accepted: 06/02/2006] [Indexed: 05/04/2023]
Abstract
The role of Ca(2+) in the induction of enzymes involved in fructan synthesis (FSS) mediated by sucrose was studied in wheat (Triticum aestivum). Increase of FSS enzyme activity and induction of the expression of their coding genes by sucrose were inhibited in leaf blades treated with chelating agents (EDTA, EGTA and BAPTA). Ca(2+) channel blockers (lanthanum chloride and ruthenium red) also inhibited the FSS response to sucrose, suggesting the participation of Ca(2+) from both extra- and intra- cellular stores. Sucrose induced a rapid Ca(2+) influx into the cytosol in wheat leaf and root tissues, shown with the Ca(2+ )sensitive fluorescent probe Fluo-3/AM ester. Our results support the hypothesis that calcium is a component of the sucrose signaling pathway that leads to the induction of fructan synthesis.
Collapse
Affiliation(s)
- Giselle Martínez-Noël
- Centro de Investigaciones Biológicas, Fundación para Investigaciones Biológicas Aplicadas (FIBA), Vieytes 3103, 7600 Mar del Plata, Argentina.
| | | | | | | | | |
Collapse
|
23
|
Lundmark M, Cavaco AM, Trevanion S, Hurry V. Carbon partitioning and export in transgenic Arabidopsis thaliana with altered capacity for sucrose synthesis grown at low temperature: a role for metabolite transporters. PLANT, CELL & ENVIRONMENT 2006; 29:1703-14. [PMID: 16913860 DOI: 10.1111/j.1365-3040.2006.01543.x] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
We investigated the role of metabolite transporters in cold acclimation by comparing the responses of wild-type (WT) Arabidopsis thaliana (Heynh.) with that of transgenic plants over-expressing sucrose-phosphate synthase (SPSox) or with that of antisense repression of cytosolic fructose-1,6-bisphosphatase (FBPas). Plants were grown at 23 degrees C and then shifted to 5 degrees C. We compared the leaves shifted to 5 degrees C for 3 and 10 d with new leaves that developed at 5 degrees C with control leaves on plants at 23 degrees C. At 23 degrees C, ectopic expression of SPS resulted in 30% more carbon being fixed per day and an increase in sucrose export from source leaves. This increase in fixation and export was supported by increased expression of the plastidic triose-phosphate transporter AtTPT and, to a lesser extent, the high-affinity Suc transporter AtSUC1. The improved photosynthetic performance of the SPSox plants was maintained after they were shifted to 5 degrees C and this was associated with further increases in AtSUC1 expression but with a strong repression of AtTPT mRNA abundance. Similar responses were shown by WT plants during acclimation to low temperature and this response was attenuated in the low sucrose producing FBPas plants. These data suggest that a key element in recovering flux through carbohydrate metabolism in the cold is to control the partitioning of metabolites between the chloroplast and the cytosol, and Arabidopsis modulates the expression of AtTPT to maintain balanced carbon flow. Arabidopsis also up-regulates the expression of AtSUC1, and to lesser extent AtSUC2, as down-stream components facilitate sucrose transport in leaves that develop at low temperatures.
Collapse
Affiliation(s)
- Maria Lundmark
- Umeå Plant Science Centre, Department of Plant Physiology, Umeå University, S-901 87 Umeå, Sweden
| | | | | | | |
Collapse
|
24
|
Anderca MI, Suga S, Furuichi T, Shimogawara K, Maeshima M, Muto S. Functional identification of the glycerol transport activity of Chlamydomonas reinhardtii CrMIP1. PLANT & CELL PHYSIOLOGY 2004; 45:1313-1319. [PMID: 15509855 DOI: 10.1093/pcp/pch141] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
By searching a Chlamydomonas expressed sequence tag database and by comparing the retrieved data with homologous sequences from a DNA database, we identified an expressed Chlamydomonas reinhardtii putative major intrinsic protein (MIP) gene. The nucleotide sequence, consisting of 1,631 bp, contains an open reading frame coding for a 300-amino-acid protein named CrMIP1. It possesses conserved NPA motifs, but is not highly homologous to known aquaporins. CrMIP1 was expressed in Saccharomyces cerevisiae and assayed for water and glycerol transport activity. By the stopped-flow spectrophotometric assay, CrMIP1 did not enhance the osmotic water permeability of membrane vesicles of the yeast transformant. However, the transformant cells showed glycerol transport activity in the in vivo assay using [14C]glycerol. This is the first report on the isolation and functional identification of a MIP member from algae.
Collapse
|
25
|
Kadota Y, Furuichi T, Ogasawara Y, Goh T, Higashi K, Muto S, Kuchitsu K. Identification of putative voltage-dependent Ca2+-permeable channels involved in cryptogein-induced Ca2+ transients and defense responses in tobacco BY-2 cells. Biochem Biophys Res Commun 2004; 317:823-30. [PMID: 15081414 DOI: 10.1016/j.bbrc.2004.03.114] [Citation(s) in RCA: 78] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2004] [Indexed: 11/29/2022]
Abstract
Ca(2+) is the pivotal second messenger for induction of defense responses induced by treatment of pathogen-derived elicitor or microbial infection in plants. However, molecular bases for elicitor-induced generation of Ca(2+) signals (Ca(2+) transients) are largely unknown. We here identified cDNAs for putative voltage-dependent Ca(2+)-permeable channels, NtTPC1A and NtTPC1B, that are homologous to TPC1 (two pore channel) from suspension-cultured tobacco BY-2 cells. NtTPC1s complemented the growth of a Saccharomyces cerevisiae mutant defective in CCH1, a putative Ca(2+) channel, in a low Ca(2+) medium, suggesting that both products permeate Ca(2+) through the plasma membrane. Cosuppression of NtTPC1s in apoaequorin-expressing BY-2 cells resulted in inhibition of rise in cytosolic free Ca(2+) concentration ([Ca(2+)](cyt)) in response to sucrose and a fungal elicitor cryptogein, while it did not affect hypoosmotic shock-induced [Ca(2+)](cyt) increase. Cosuppression of NtTPC1s also caused suppression of cryptogein-induced programmed cell death and defense-related gene expression. These results suggest that NtTPC1s are involved in Ca(2+) mobilization induced by the cryptogein and sucrose, and have crucial roles in cryptogein-induced signal transduction pathway.
Collapse
Affiliation(s)
- Yasuhiro Kadota
- Department of Applied Biological Science, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan
| | | | | | | | | | | | | |
Collapse
|
26
|
Takahashi F, Sato-Nara K, Kobayashi K, Suzuki M, Suzuki H. Sugar-induced adventitious roots in Arabidopsis seedlings. JOURNAL OF PLANT RESEARCH 2003; 116:83-91. [PMID: 12736780 DOI: 10.1007/s10265-002-0074-2] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2002] [Accepted: 11/20/2002] [Indexed: 05/20/2023]
Abstract
The effects of sugars on root growth and on development of adventitious roots were analyzed in Arabidopsis thaliana. Seeds were sown on agar plates containing 0.0-5.0% sugars and placed vertically in darkness (DD) or under long day (LD, 16 h:8 h) conditions, so that the seedlings were constantly attached to the agar medium. In the sucrose-supplemented medium, seedlings showed sustained growth in both DD and LD. However, only dark-grown seedlings developed adventitious roots from the elongated hypocotyl. The adventitious roots began to develop 5 days after imbibition and increased in number until day 11. They could, however, be initiated at any position along the hypocotyl, near the cotyledon or the primary root. They were initiated in the pericycle in the same manner as ordinary lateral roots. Sucrose, glucose and fructose greatly stimulated the induction of adventitious roots, but mannose or sorbitol did not. Sucrose at concentrations of 0.5-2.0% was most effective in inducing adventitious roots, although 5.0% sucrose suppressed induction. Direct contact of the hypocotyl with the sugar-supplemented agar medium was indispensable for the induction of adventitious roots.
Collapse
|
27
|
Otsuki S, Ikeda A, Sunako T, Muto S, Yazaki J, Nakamura K, Fujii F, Shimbo K, Otsuka Y, Yamamoto K, Sakata K, Sasaki T, Kishimoto N, Kikuchi S, Yamaguchi J. Novel gene encoding a Ca2+-binding protein and under hexokinase-dependent sugar regulation. Biosci Biotechnol Biochem 2003; 67:347-53. [PMID: 12728997 DOI: 10.1271/bbb.67.347] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
A cDNA encoding a predicted 15-kDa protein was earlier isolated from sugar-induced genes in rice embryos (Oryza sativa L.) by cDNA microarray analysis. Here we report that this cDNA encodes a novel Ca2+-binding protein, named OsSUR1 (for Oryza sativa sugar-up-regulated-1). The recombinant OsSUR1 protein expressed in Escherichia coli had 45Ca2+-binding activity. Northern analysis showed that the OsSUR1 gene was expressed mainly in the internodes of mature plants and in embryos at an early stage of germination. Expression of the OsSUR1 gene was induced by sugars that could serve as substrates of hexokinase, but expression was not repressed by Ca2+ signaling inhibitors, calmodulin antagonists and inhibitors of protein kinase or protein phosphatase. These results suggested that Os-SUR1 gene expression was stimulated by a hexokinase-dependent pathway not mediated by Ca2+.
Collapse
Affiliation(s)
- Shigeo Otsuki
- Division of Biological Sciences, Graduate School of Science, Hokkaido University, Kita-ku N10-W8, Sapporo 060-0810, Japan
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
28
|
Mithöfer A, Mazars C. Aequorin-based measurements of intracellular Ca2+-signatures in plant cells. Biol Proced Online 2002; 4:105-118. [PMID: 12734562 PMCID: PMC145563 DOI: 10.1251/bpo40] [Citation(s) in RCA: 67] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2002] [Revised: 11/19/2002] [Accepted: 11/21/2002] [Indexed: 11/23/2022] Open
Abstract
Due to the involvement of calcium as a main second messenger in the plant signaling pathway, increasing interest has been focused on the calcium signatures supposed to be involved in the patterning of the specific response associated to a given stimulus. In order to follow these signatures we described here the practical approach to use the non-invasive method based on the aequorin technology. Besides reviewing the advantages and disadvantages of this method we report on results showing the usefulness of aequorin to study the calcium response to biotic (elicitors) and abiotic stimuli (osmotic shocks) in various compartments of plant cells such as cytosol and nucleus.
Collapse
Affiliation(s)
- Axel Mithöfer
- Department Biologie I der Ludwig-Maximilians-Universität, Botanik. Menzinger Str. 67, D-80638, München. Germany.Signaux et Messages Cellulaires chez les Végétaux, UMR CNRS/UPS 5546. 24 Chemin de Borde Rouge, BP 17 Auzeville, F-31326 Castanet-Tolosan. France.
| | | |
Collapse
|
29
|
Cheng SH, Willmann MR, Chen HC, Sheen J. Calcium signaling through protein kinases. The Arabidopsis calcium-dependent protein kinase gene family. PLANT PHYSIOLOGY 2002; 129:469-85. [PMID: 12068094 PMCID: PMC1540234 DOI: 10.1104/pp.005645] [Citation(s) in RCA: 503] [Impact Index Per Article: 22.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
In plants, numerous Ca(2+)-stimulated protein kinase activities occur through calcium-dependent protein kinases (CDPKs). These novel calcium sensors are likely to be crucial mediators of responses to diverse endogenous and environmental cues. However, the precise biological function(s) of most CDPKs remains elusive. The Arabidopsis genome is predicted to encode 34 different CDPKs. In this Update, we analyze the Arabidopsis CDPK gene family and review the expression, regulation, and possible functions of plant CDPKs. By combining emerging cellular and genomic technologies with genetic and biochemical approaches, the characterization of Arabidopsis CDPKs provides a valuable opportunity to understand the plant calcium-signaling network.
Collapse
Affiliation(s)
- Shu-Hua Cheng
- Department of Genetics, Harvard Medical School, MA 02114, USA
| | | | | | | |
Collapse
|
30
|
Furuichi T, Cunningham KW, Muto S. A putative two pore channel AtTPC1 mediates Ca(2+) flux in Arabidopsis leaf cells. PLANT & CELL PHYSIOLOGY 2001; 42:900-5. [PMID: 11577183 DOI: 10.1093/pcp/pce145] [Citation(s) in RCA: 127] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
The gene encoding voltage-gated channel with high affinity for Ca(2+) permeation has not been cloned from plants. In the present study, we isolated a full-length cDNA encoding a putative Ca(2+ )channel (AtTPC1) from Arabidopsis. AtTPC1 has two conserved homologous domains, both of which contain six transmembrane segments (S1-S6) and a pore loop (P) between S5 and S6 in each domain, and has the highest homology with the two pore channel TPC1 recently cloned from rat. The overall structure is similar to the half of the general structure of alpha-subunits of voltage-activated Ca(2+) channels from animals. AtTPC1 rescued the Ca(2+) uptake activity of a yeast mutant cch1. Sucrose-induced luminescence, which reflects a cytosolic free Ca(2+) increase in aequorin-expressing Arabidopsis leaves, was enhanced by overexpression of AtTPC1 and suppressed by antisense expression of it. Sucrose-H(+) symporters AtSUC1 and 2, which depolarize membrane potential of cells receiving sucrose, also depressed a Ca(2+) increase by their antisense expression. These results suggest that AtTPC1 mediates a voltage-activated Ca(2+ )influx in Arabidopsis leaf cells.
Collapse
Affiliation(s)
- T Furuichi
- Graduate School of Bioagricultural Sciences, Nagoya University, Chikusa-ku, Nagoya, 464-8601 Japan
| | | | | |
Collapse
|