Abstract
Main conclusion
Bioinformatic, molecular, and biochemical analysis were performed to get more insight into the regulatory mechanism by which TmHKT1;4-A2 is regulated.
Abstract
HKT transporters from different plant species have been shown to play important role in plant response to salt. In previous work, TmHKT1;4-A2 gene from Triticum monococcum has been characterized as a major gene for Nax1 QTL (Tounsi et al. Plant Cell Physiol 57:2047–2057, 2016). So far, little is known about its regulatory mechanism. In this study, the promoter region of TmHKT1;4-A2 (1400 bp) was isolated and considered as the full-length promoter (PA2-1400). In silico analysis revealed the presence of important cis-acting elements related to abiotic stresses and phytohormones. Interestingly, our real-time RT-PCR analysis provided evidence that TmHKT1;4-A2 is regulated not only by salt stress but also by osmotic, heavy metal, oxidative, and hormones stresses. In transgenic Arabidopsis plants, TmHKT1;4-A2 is strongly active in vascular tissues of roots and leaves. Through 5′-end deletion analysis, we showed that PA2-1400 promoter is able to drive strong GUS activity under normal conditions and in response to different stresses compared to PA2-824 and PA2-366 promoters. These findings provide new information on the regulatory mechanism of TmHKT1;4-A2 and shed more light on its role under different stresses.
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Abbreviations
- CAMTA:
-
Calmodulin-binding transcription activator
- HKT:
-
High-affinity potassium transporter
- QTL:
-
Quantitative trait locus
References
Albacete A, Ghanem ME, Martinez-Andujar C, Acosta M, Sanchez-Bravo J, Martinez V, Lutts S, Dodd IC, Perez-Alfocea F (2008) Hormonal changes in relation to biomass partitioning and shoot growth impairment in salinized tomato (Solanum lycopersicum L.) plants. J Exp Bot 59(15):4119–4131. https://doi.org/10.1093/jxb/ern251
Ali A, Raddatz N, Aman R, Kim S, Park HC, Jan M, Baek D, Khan IU, Oh DH, Lee SY, Bressan RA, Lee KW, Maggio A, Pardo JM, Bohnert HJ, Yun DJ (2016) A single amino-acid substitution in the sodium transporter HKT1 associated with plant salt tolerance. Plant Physiol 171(3):2112–2126. https://doi.org/10.1104/pp.16.00569
Ali A, Maggio A, Bressan RA, Yun DJ (2019) Role and functional differences of HKT1-type transporters in plants under salt stress. Int J Mol Sci 20(5):1059. https://doi.org/10.3390/ijms20051059
Baek D, Jiang J, Chung JS, Wang B, Chen J, Xin Z, Shi H (2011) Regulated AtHKT1 gene expression by a distal enhancer element and DNA methylation in the promoter plays an important role in salt tolerance. Plant Cell Physiol 52(1):149–161. https://doi.org/10.1093/pcp/pcq182
Ben Amar S, Brini F, Sentenac H, Masmoudi K, Véry AA (2014) Functional characterization in Xenopus oocytes of Na+ transport systems from durum wheat reveals diversity among two HKT1;4 transporters. J Exp Bot 65(1):213–222
Berthomieu P, Conéjéro G, Nublat A, Brackenbury WJ, Lambert C, Savio C, Uozumi N, Oiki S, Yamada K, Cellier F, Gosti F, Simonneau T, Essah PA, Tester M, Véry A-A, Sentenac H, Casse F (2003) Functional analysis of AtHKT1 in Arabidopsis shows that Na(+) recirculation by the phloem is crucial for salt tolerance. EMBO J 22(9):2004–2014
Bradford MM (1976) A rapid and sensitive method for the quantitation of microgram quantities of protein utilizing the principle of protein-dye binding. Anal Biochem 72:248–254. https://doi.org/10.1006/abio.1976.9999
Byrt CS, Platten JD, Spielmeyer W, James RA, Lagudah ES, Dennis ES, Tester M, Munns R (2007) HKT1;5-like cation transporters linked to Na+ exclusion loci in wheat, Nax2 and Kna1. Plant Physiol 143(4):1918–1928. https://doi.org/10.1104/pp.106.093476
Byrt CS, Xu B, Krishnan M, Lightfoot DJ, Athman A, Jacobs AK, Watson-Haigh NS, Plett D, Munns R, Tester M, Gilliham M (2014) The Na(+) transporter, TaHKT1;5-D, limits shoot Na(+) accumulation in bread wheat. Plant J Cell Mol Biol 80(3):516–526. https://doi.org/10.1111/tpj.12651
Chen K, Li GJ, Bressan RA, Song CP, Zhu JK, Zhao Y (2020) Abscisic acid dynamics, signaling, and functions in plants. J Integr Plant Biol 62(1):25–54. https://doi.org/10.1111/jipb.12899
Clough SJ, Bent AF (1998) Floral dip: a simplified method for agrobacterium-mediated transformation of Arabidopsis thaliana. Plant J Cell Mol Biol 16(6):735–743. https://doi.org/10.1046/j.1365-313x.1998.00343.x
Davenport R, James RA, Zakrisson-Plogander A, Tester M, Munns R (2005) Control of sodium transport in durum wheat. Plant Physiol 137(3):807–818. https://doi.org/10.1104/pp.104.057307
Garciadeblas B, Senn ME, Banuelos MA, Rodriguez-Navarro A (2003) Sodium transport and HKT transporters: the rice model. Plant J Cell Mol Biol 34(6):788–801. https://doi.org/10.1046/j.1365-313x.2003.01764.x
Genc Y, Taylor J, Lyons G, Li Y, Cheong J, Appelbee M, Oldach K, Sutton T (2019) Bread wheat with high salinity and sodicity tolerance. Front Plant Sci 10:1280. https://doi.org/10.3389/fpls.2019.01280
Gorham J, Jones RG, Bristol A (1990) Partial characterization of the trait for enhanced K+–Na+ discrimination in the D genome of wheat. Planta 180(4):590–597. https://doi.org/10.1007/BF02411458
Hartley TN, Thomas AS, Maathuis FJM (2020) A role for the OsHKT 2;1 sodium transporter in potassium use efficiency in rice. J Exp Bot 71(2):699–706. https://doi.org/10.1093/jxb/erz113
Hazzouri KM, Khraiwesh B, Amiri KMA, Pauli D, Blake T, Shahid M, Mullath SK, Nelson D, Mansour AL, Salehi-Ashtiani K, Purugganan M, Masmoudi K (2018) Mapping of HKT1;5 gene in barley using GWAS approach and its implication in salt tolerance mechanism. Front Plant Sci 9:156. https://doi.org/10.3389/fpls.2018.00156
Higo K, Ugawa Y, Iwamoto M, Korenaga T (1999) Plant cis-acting regulatory DNA elements (PLACE) database: 1999. Nucleic Acids Res 27(1):297–300. https://doi.org/10.1093/nar/27.1.297
Hmidi D, Messedi D, Corratgi-Faillie C, Marhuenda TO, Fizames CC, Zorrig W, Abdelly C, Sentenac H, Véry AA (2019) Investigation of Na+ and K+ transport in halophytes: functional analysis of the HmHKT2;1 Transporter from Hordeum maritimum and expression under saline conditions. Plant Cell Physiol 60(11):2423–2435. https://doi.org/10.1093/pcp/pcz136
Horie T, Hauser F, Schroeder JI (2009) HKT transporter-mediated salinity resistance mechanisms in Arabidopsis and monocot crop plants. Trends Plant Sci 14(12):660–668. https://doi.org/10.1016/j.tplants.2009.08.009
Huang S, Spielmeyer W, Lagudah ES, James RA, Platten JD, Dennis ES, Munns R (2006) A sodium transporter (HKT7) is a candidate for Nax1, a gene for salt tolerance in durum wheat. Plant Physiol 142:1718–1727
Huang S, Spielmeyer W, Lagudah ES, Munns R (2008) Comparative mapping of HKT genes in wheat, barley, and rice, key determinants of Na+ transport, and salt tolerance. J Exp Bot 59(4):927–937. https://doi.org/10.1093/jxb/ern033
Jabnoune M, Espeout S, Mieulet D, Fizames C, Verdeil JL, Conejero G, Rodriguez-Navarro A, Sentenac H, Guiderdoni E, Abdelly C, Very AA (2009) Diversity in expression patterns and functional properties in the rice HKT transporter family. Plant Physiol 150(4):1955–1971. https://doi.org/10.1104/pp.109.138008
James RA, Davenport RJ, Munns R (2006) Physiological characterization of two genes for Na+ exclusion in durum wheat, Nax1 and Nax2. Plant Physiol 142(4):1537–1547. https://doi.org/10.1104/pp.106.086538
James RA, Blake C, Byrt CS, Munns R (2011) Major genes for Na+ exclusion, Nax1 and Nax2 (wheat HKT1;4 and HKT1;5), decrease Na+ accumulation in bread wheat leaves under saline and waterlogged conditions. J Exp Bot 62(8):2939–2947. https://doi.org/10.1093/jxb/err003
Jefferson RA, Kavanagh TF, Bevan MW (1987) GUS fusions: beta-glucuronidase as a sensitive and versatile gene fusion marker in higher plants. EMBO J 6(13):3901–3907
Khan I, Mohamed S, Regnault T, Mieulet D, Guiderdoni E, Sentenac H, Very AA (2020) Constitutive contribution by the rice OsHKT1;4 Na+ transporter to xylem sap desalinization and low Na+ accumulation in young leaves under low as high external Na+ conditions. Front Plant Sci 11:1130. https://doi.org/10.3389/fpls.2020.01130
Lescot M, Dehais P, Thijs G, Marchal K, Moreau Y, Van de Peer Y, Rouze P, Rombauts S (2002) PlantCARE, a database of plant cis-acting regulatory elements and a portal to tools for in silico analysis of promoter sequences. Nucleic Acids Res 30(1):325–327. https://doi.org/10.1093/nar/30.1.325
Li H, Xu G, Yang C, Yang L, Liang Z (2019) Genome-wide identification and expression analysis of HKT transcription factor under salt stress in nine plant species. Ecotoxicol Environ Saf 171:435–442. https://doi.org/10.1016/j.ecoenv.2019.01.008
Livak KJ, Schmittgen TD (2001) Analysis of relative gene expression data using real-time quantitative PCR and the 2−ΔΔCT method. Methods 25(4):402–408. https://doi.org/10.1006/meth.2001.1262
Mason MG, Jha D, Salt DE, Tester M, Hill K, Kieber JJ, Schaller GE (2010) Type-B response regulators ARR1 and ARR12 regulate expression of AtHKT1;1 and accumulation of sodium in Arabidopsis shoots. Plant J Mol Biol 64(5):753–763. https://doi.org/10.1111/j.1365-313X.2010.04366.x
Michiels A, Tucker M, van den Ende W, Van Laere A (2003) Chromosomal walking of flanking regions from short known sequences in GC-rich plant genomic DNA. Plant Mol Biol Rep 21(3):295–302. https://doi.org/10.1007/BF02772805
Moller IS, Gilliham M, Jha D, Mayo GM, Roy SJ, Coates JC, Haseloff J, Tester M (2009) Shoot Na+ exclusion and increased salinity tolerance engineered by cell type-specific alteration of Na+ transport in Arabidopsis. Plant Cell 21(7):2163–2178. https://doi.org/10.1105/tpc.108.064568
Munns R, Tester M (2008) Mechanisms of salinity tolerance. Annu Rev Plant Biol 59:651–681. https://doi.org/10.1146/annurev.arplant.59.032607.092911
Pardo JM, Cubero B, Leidi EO, Quintero FJ (2006) Alkali cation exchangers: roles in cellular homeostasis and stress tolerance. J Exp Bot 57(5):1181–1199. https://doi.org/10.1093/jxb/erj114
Platten JD, Cotsaftis O, Berthomieu P, Bohnert H, Davenport RJ, Fairbairn DJ, Horie T, Leigh RA, Lin HX, Luan S, Maser P, Pantoja O, Rodriguez-Navarro A, Schachtman DP, Schroeder JI, Sentenac H, Uozumi N, Very AA, Zhu JK, Dennis ES, Tester M (2006) Nomenclature for HKT transporters, key determinants of plant salinity tolerance. Trends Plant Sci 11(8):372–374. https://doi.org/10.1016/j.tplants.2006.06.001
Ren ZH, Gao JP, Li LG, Cai XL, Huang W, Chao DY, Zhu MZ, Wang ZY, Luan S, Lin HX (2005) A rice quantitative trait locus for salt tolerance encodes a sodium transporter. Nat Genet 37(10):1141–1146. https://doi.org/10.1038/ng1643
Rengasamy P (2010) Soil processes affecting crop production in salt-affected soils. Funct Plant Biol 37(7):613–620
Seo HS, Kim SK, Jang SW, Choo YS, Sohn EY, Lee IJ (2005) Effect of jasmonic acid on endogenous gibberellins and abscisic acid in rice under NaCl stress. Biol Plant 49(3):447–450. https://doi.org/10.1007/s10535-005-0026-5
Shavrukov Y, Langridge P, Tester M (2009) Salinity tolerance and sodium exclusion in genus Triticum. Breed Sci 59(5):671–678. https://doi.org/10.1270/jsbbs.59.671
Shen Q, Fu L, Su T, Ye L, Huang L, Kuang L, Wu L, Wu D, Chen Z-H, Zhang G (2020) Calmodulin HvCaM1 negatively regulates salt tolerance via modulation of HvHKT1s and HvCAMTA4. Plant Physiol 183(4):1650–1662. https://doi.org/10.1104/pp.20.00196
Shkolnik D, Finkler A, Pasmanik-Chor M, Fromm H (2019) Calmodulin-binding transcription activator 6: a key regulator of Na(+) homeostasis during germination. Plant Physiol 180(2):1101–1118. https://doi.org/10.1104/pp.19.00119
Suzuki K, Yamaji N, Costa A, Okuma E, Kobayashi NI, Kashiwagi T, Katsuhara M, Wang C, Tanoi K, Murata Y, Schroeder JI, Ma JF, Horie T (2016) OsHKT1;4-mediated Na+ transport in stems contributes to Na+ exclusion from leaf blades of rice at the reproductive growth stage upon salt stress. BMC Plant Biol 16:22. https://doi.org/10.1186/s12870-016-0709-4
Tounsi S, Ben Amar S, Masmoudi K, Sentenac H, Brini F, Very AA (2016) Characterization of two HKT1;4 transporters from Triticum monococcum to elucidate the determinants of the wheat salt tolerance Nax1 QTL. Plant Cell Physiol 57(10):2047–2057. https://doi.org/10.1093/pcp/pcw123
Tounsi S, Feki K, Hmidi D, Masmoudi K, Brini F (2017) Salt stress reveals differential physiological, biochemical and molecular responses in T. monococcum and T. durum wheat genotypes. Physiol Mol Biol Plants Int J Funct Plant Biol 23(3):517–528. https://doi.org/10.1007/s12298-017-0457-4
Tounsi S, Feki K, Saidi MN, Maghrebi S, Brini F, Masmoudi K (2018) Promoter of the TmHKT1;4–A1 gene of Triticum monococcum directs stress inducible, developmental regulated and organ specific gene expression in transgenic Arbidopsis thaliana. World J Microbiol Biotechnol 34(7):99. https://doi.org/10.1007/s11274-018-2485-9
Tounsi S, Feki K, Kamoun Y, Saidi MN, Jemli S, Ghorbel M, Alcon C, Brini F (2019) Highlight on the expression and the function of a novel MnSOD from diploid wheat (T. monococcum) in response to abiotic stress and heavy metal toxicity. Plant Physiol Biochem PPB 142:384–394. https://doi.org/10.1016/j.plaphy.2019.08.001
Véry A-A, Nieves-Cordones M, Daly M, Khan I, Fizames C, Sentenac H (2014) Molecular biology of K+ transport across the plant cell membrane: What do we learn from comparison between plant species? J Plant Physiol 171(9):748–769. https://doi.org/10.1016/j.jplph.2014.01.011
Xu B, Waters S, Byrt CS, Plett D, Tyerman SD, Tester M, Munns R, Hrmova M, Gilliham M (2018) Structural variations in wheat HKT1;5 underpin differences in Na+ transport capacity. Cell Mol Life Sci CMLS 75(6):1133–1144. https://doi.org/10.1007/s00018-017-2716-5
Yang F, Dong FS, Hu FH, Liu YW, Chai JF, Zhao H, Lv MY, Zhou S (2020) Genome-wide identification and expression analysis of the calmodulin-binding transcription activator (CAMTA) gene family in wheat (Triticum aestivum L.). BMC Genet 21(1):105. https://doi.org/10.1186/s12863-020-00916-5
Yue R, Lu C, Sun T, Peng T, Han X, Qi J, Yan S, Tie S (2015) Identification and expression profiling analysis of calmodulin-binding transcription activator genes in maize (Zea mays L.) under abiotic and biotic stresses. Front Plant Sci 6:576. https://doi.org/10.3389/fpls.2015.00576
Zhu JK (2002) Salt and drought stress signal transduction in plants. Annu Rev Plant Biol 53:247–273. https://doi.org/10.1146/annurev.arplant.53.091401.143329
Acknowledgements
We are thankful to ICARDA for the provision of Seeds of Triticum monococcum (cv. Turkey).
Funding
This study was supported by a grant from the Ministry of Higher Education and Scientific Research, Tunisia, and by a research grant from research office, United Arab Emirates University (Grant No. 31F096 to KM).
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Tounsi, S., Saïdi, M.N., Abdelhedi, R. et al. Functional analysis of TmHKT1;4-A2 promoter through deletion analysis provides new insight into the regulatory mechanism underlying abiotic stress adaptation. Planta 253, 18 (2021). https://doi.org/10.1007/s00425-020-03533-9
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DOI: https://doi.org/10.1007/s00425-020-03533-9