Overall Picture Of Expressed Heat Shock Factors In Glycine Max, Lotus Japonicusand Medicago Truncatula

Heat shock (HS) leads to the activation of molecular mechanisms, known as HS-response, that prevent damage and enhance survival under stress. Plants have a flexible and specialized network of Heat Shock Factors (HSFs), which are transcription factors that induce the expression of heat shock proteins. The present work aimed to identify and characterize the Glycine maxHSF repertory in the Soybean Genome Project (GENOSOJA platform), comparing them with other legumes (Medicago truncatulaand Lotus japonicus) in view of current knowledge of Arabidopsis thaliana. The HSF characterization in leguminous plants led to the identification of 25, 19 and 21 candidate ESTs in soybean, Lotusand Medicago, respectively. A search in the SuperSAGE libraries revealed 68 tags distributed in seven HSF gene types. From the total number of obtained tags, more than 70% were related to root tissues (water deficit stress libraries vs.controls), indicating their role in abiotic stress responses, since the root is the first tissue to sense and respond to abiotic stress. Moreover, as heat stress is related to the pressure of dryness, a higher HSF expression was expected at the water deficit libraries. On the other hand, expressive HSF candidates were obtained from the library inoculated with Asian Soybean Rust, inferring crosstalk among genes associated with abiotic and biotic stresses. Evolutionary relationships among sequences were consistent with different HSF classes and subclasses. Expression profiling indicated that regulation of specific genes is associated with the stage of plant development and also with stimuli from other abiotic stresses pointing to the maintenance of HSF expression at a basal level in soybean, favoring its activation under heat-stress conditions. © 2012, Sociedade Brasileira de Genética.35SUPPL.1247259Altschul, S.F., Gish, W., Miller, W., Myers, E.W., Lipman, D.J., Basic local alignment search tool (1990) J Mol Biol, 215, pp. 403-410Baniwal, S.K., Chan, K.Y., Scharf, K.-D., Nover, L., Role of heat stress transcription factor HsfA5 as specific repressor of HsfA4* (2007) J Biol Chem, 282, pp. 3605-3613Bharti, K., Schimidt, E., Lyck, R., Bublak, D., Scharf, K.-D., Isolation and characterization of HsfA3, a new heat stress transcription factor of Lycopersicon peruvianum (2000) Plant J, 22, pp. 355-365Bharti, K., von Koskull-Döring, P., Bharti, S., Kumar, P., Tintschl-Körbitzer, A., Treuter, E., Nover, L., Tomato heat stress transcription factor HsfB1 represents a novel type of general transcription coactivator with a histone-like motif interacting with HAC1/CBP (2004) Plant Cell, 16, pp. 1521-1535Efeoglu, B., Heat shock proteins and heat shock response in plants (2009) G U J Sci, 22, pp. 67-75Eisen, M.B., Spellman, P.T., Brown, P.O., Botstein, D., Cluster analysis and display of genome-wide expression patterns (1998) Proc Natl Acad Sci USA, 95, pp. 14863-14868Fehr, W.R., Caviness, C.E., Burmood, D.T., Pennington, I.S., Stage of development descriptions for soybeans, Glycine max (L.) Merrill (1971) Crop Sci, 11, pp. 929-931Fehr, W.R., Caviness, C.E., (1977) Stage of Soybean Development, p. 12. , Special Report n. 80. Ames, Iowa State University of Science and Technology, IowaGlombitza, S., Dubuis, P.-H., Thulke, O., Welzl, G., Bovet, L., Götz, M., Affenzeller, M., Asnaghi, C., Crosstalk and differential response to abiotic and biotic stressors reflected at the transcriptional level of effector genes from secondary metabolism (2004) Plant Mol Biol, 54, pp. 817-835Heerklotz, D., Doring, P., Bonzelius, F., Winkelhaus, S., Nover, L., The balance of nuclear import and export determines the intracellular distribution and function of tomato heat stress transcription factor HsfA2 (2001) Mol Cell Biol, 21, pp. 1759-1768Hoagland, D., Arnon, D.I., The water culture method for growing plants without soil (1950) Calif Agric Exp Stn Circ, 347, pp. 1-32Hsu, S.-F., Lai, H.-C., Jinn, T.-L., Cytosol-localized heat shock factor-binding protein, AtHSBP, functions as a negative regulator of heat shock response by translocation to the nucleus and is required for seed development in Arabidopsis (2010) Plant Physiol, 153, pp. 773-784Hu, W., Hu, G., Han, B., Genome-wide survey and expression profiling of heat shock proteins and heat shock factors revealed overlapped and stress specific response under abiotic stresses in rice (2009) Plant Sci, 176, pp. 583-590Kido, E.A., Barbosa, P.K., Ferreira Neto, J.C.R., Pandolfi, V., Houllou-Kido, L.M., Crovella, S., Benko-Iseppon, A.M., Identification of plant protein kinases in response to abiotic and biotic stresses using SuperSAGE (2011) Curr Prot Pept Sci, 12, pp. 643-656Kotak, S., Port, M., Ganguli, A., Bicker, F., von Koskull-Doring, P., Characterization of C-terminal domains of Arabidopsis heat stress transcription factors (Hsfs) and identification of a new signature combination of plant class a Hsfs with AHA and NES motifs essential for activator function and intracellular localization (2004) Plant J, 39, pp. 98-112Kotak, S., Larkindale, J., Lee, U., von Koskull-Doring, P., Vierling, E., Scharf, K.D., Complexity of the heat stress response in plants (2007) Curr Opin Plant Biol, 10, pp. 310-316Li, H.-Y., Chang, C.-S., Lu, L.-S., Liu, C.-A., Chan, M.-T., Charng, Y.-Y., Over-expression of Arabidopsis thaliana heat shock factor gene (AtHsfA1b) enhances chilling tolerance in transgenic tomato (2004) Bot Bull Acad Sin, 44, pp. 129-140Li, M., Berendzen, K.W., Schoffl, F., Promoter specificity and interactions between early and late Arabidopsis heat shock factors (2010) Plant Mol Biol, 73, pp. 559-567McClean, P.E., Mamidi, S., McConnell, M., Chikara, S., Lee, R., Synteny mapping between common bean and soybean reveals extensive blocks of shared loci (2010) BMC Genomics, 11, pp. e184Miller, G., Mittler, R., Could heat shock transcription factors function as hydrogen peroxide sensors in plant? (2006) Ann Bot, 98, pp. 279-288Mittal, D., Chakrabarti, S., Sarkar, A., Singh, A., Grover, A., Heat shock factor gene family in rice: Genomic organization and transcript expression profiling in response to high temperature, low temperature and oxidative stresses (2009) Plant Physiol Biochem, 47, pp. 785-795Mochida, K., Yoshida, T., Sakurai, T., Yamaguchi-Shinozaki, K., Shinozaki, K., Tran, L.-S.P., In silico analysis of transcription factor repertoire and prediction of stress responsive transcription factors in soybean (2009) DNA Res, 16, pp. 353-369Mochida, K., Yoshida, T., Sakurai, T., Yamaguchi-Shinozaki, K., Shinozaki, K., Tran, L.-S.P., LegumeTFDB: An in-tegrative database of Glycine max, Lotus japonicus and Medicago truncatula transcription factors (2009) Bioinformatics, 26, pp. 290-291Nascimento, L.C., Costa, G.G.L., Binneck, E., Pereira, G.A.G., Caraz-Zolle, M.F., A web-based bioinformatics interface applied to Genosoja Project: Databases and pipelines (2012) Genet Mol Biol, 35 (SUPPL. 1), pp. 203-211Nover, L., Bharti, K., Doring, P., Mishra, S.K., Ganguli, A., Scharf, K.-D., Arabidopsis and the heat stress transcription factor world: How many heat stress transcription factors do we need? (2001) Cell Stress Chap, 6, pp. 177-189Pirkkala, L., Nykanen, I., Sistonen, L., Roles of the heat shock transcription factors in regulation of the heat shock response and beyond (2001) FASEB J, 15, pp. 1118-1131Ruelland, E., Zachowski, A., How plants sense temperature (2010) Environ Exp Bot, 69, pp. 225-232Sato, Y., Yokoya, S., Enhanced tolerance to drought stress in transgenic rice plants overexpressing a small heat-shock protein, sHSP17.7 (2008) Plant Cell Rep, 27, pp. 329-334Scharf, K.-D., Rose, S., Thierfelder, J., Nover, L., Two cDNAs for tomato heat stress transcription factors (1993) Plant Physiol, 102, pp. 1355-1356Scharf, K.-D., Rose, S., Zott, W., Schoffl, F., Nover, L., Three tomato genes code for heat stress transcription factors with a regionofremarkable homology to the DNA-binding domain of the yeast HSF (1990) EMBO J, 9, pp. 4495-4501Schöff, F., Prändl, R., Reindl, A., Regulation of the heat-shock response (1998) Plant Physiol, 117, pp. 1135-1141Sung, D.-Y., Kaplan, F., Lee, K.-J., Guy, C.L., Acquired tolerance to temperature extremes (2003) Trends Plant Sci, 8, pp. 179-187Swindell, W.R., Huebner, M., Weber, A.P., Transcriptional profiling of Arabidopsis heat shock proteins and transcription factors reveals extensive overlap between heat and non-heat stress response pathways (2007) BMC Genomics, 8, pp. e125Tamura, K., Peterson, D., Peterson, N., Stecher, G., Nei, M., Kumar, S., MEGA5: Molecular Evolutionary Genetics Analysis using maximum likelihood, evolutionary distance, and maximum parsimony methods (2011) Mol Biol Evol, 28, pp. 2731-2739Treshow, M., (1970) Environment and Plant Response, p. 421. , McGraw-Hill Company, New YorkTreuter, E., Nover, L., Ohme, K., Scharf, K.-D., Promoter specificity and deletion analysis of three tomato heat stress transcription factors (1993) Mol Gen Genet, 240, pp. 113-125Yamada, K., Fukao, Y., Hayashi, M., Fukazawa, M., Suzuki, I., Nishimura, M., Cytosolic HSP90 regulated the heat shock response that is responsible for heat acclimation in Arabidopsis thaliana (2007) J Biol Chem, 282, pp. 37794-3780