Farooq M, Hussain M, Wahid A, Siddique KHM. Drought stress in plants: an overview. In: Aroca R, editor. Plant Responses to Drought Stress. Springer: Berlin, Heidelberg; 2012.
 Kotak S, Larkindale J, Lee U, Koskull-Doring PV, Vierling E, Scharf KD. Complexity of the heat stress response in plants. Curr Opin Plant Biol. 2007;10:310–6.
 Mittler R. Abiotic stress, the field environment and stress combination. Trends Plant Sci. 2006;11:15–9.
 De Boeck HJ, Bassin S, Verlinden M, Zeiter M, Hiltbrunner E. Simulated heat waves affected alpine grassland only in combination with drought. New Phytol. 2015;209:531–41.
 Jones-Rhoades MW, Bartel DP, Bartel B. MicroRNAs and their regulatory roles in plants. Annu Rev Plant Biol. 2006;57:19–53.
 Zhou R, Wang Q, Jiang F, Cao X, Sun M, Liu M, et al. Identification of miRNAs and their targets in wild tomato at moderately and acutely elevated temperatures by high-throughput sequencing and degradome analysis. Sci Rep. 2016;6:33777.
 Ji Y, Chen P, Chen J, Pennerman KK, Liang X, Yan H, et al. Combinations of small RNA, RNA, and degradome sequencing uncovers the expression pattern of microRNA-mRNA pairs adapting to drought stress in leaf and root of Dactylis glomerata L. Int J Mol Sci. 2018;19:3114.
 Ma X, Xin Z, Wang Z, Yang Q, Guo S, Guo X, et al. Identification and comparative analysis of differentially expressed miRNAs in leaves of two wheat (Triticum aestivum L.) genotypes during dehydration stress. BMC Plant Biol. 2015;15:21.
 Pan Y, Niu M, Liang J, Lin E, Tong Z, Zhang J. Identification of heat-responsive miRNAs to reveal the miRNA-mediated regulatory network of heat stress response in Betula luminifera. Trees. 2017;31:1635–52.
 Zhou R, Yu X, Ottosen CO, Rosenqvist E, Zhao L, Wang Y, et al. Drought stress had a predominant effect over heat stress on three tomato cultivars subjected to combined stress. BMC Plant Biol. 2017;17:24.
 Zhou R, Kong L, Yu X, Ottosen CO, Zhao T, Jiang F, et al. Oxidative damage and antioxidant mechanism in tomatoes responding to drought and heat stress. Acta Physiol Plant. 2019;41:20.
 Rizhsky L, Liang H, Shuman J, Shulaev V, Davletova S, Mittler R. When defense pathways collide. The response of Arabidopsis to a combination of drought and heat stress. Plant Physiol. 2004;134:1683–96.
 Li X. Tan DX, Jiang D, Liu F. Melatonin enhances cold tolerance in drought primed wild type and abscisic acid-deficient mutant barley. J Pineal Res. 2016;61:328–39.
 Martinez V, Nieves-Cordones M, Lopez-Delacalle M, Rodenas R, Mestre T, Garcia-Sanchez F, et al. Tolerance to stress combination in tomato plants: New insights in the protective role of melatonin. Molecules. 2018;23:535.
 Lamaoui M, Jemo M, Datla R, Bekkaoui F. Heat and drought stresses in crops and approaches for their mitigation. Front Chem. 2018;6:26
 Zhang N, Sun Q, Zhang H, Cao Y, Weeda S, Ren S, et al. Roles of melatonin in abiotic stress resistance in plants. J Exp Bot. 2014;66:647–56.
 Bartel DP. MicroRNAs: genomics, biogenesis, mechanism, and function. Cell. 2004;116:281–97.
 Mi S, Cai T, Hu Y, Chen Y, Hodges E, Ni F, et al. Sorting of small RNAs into Arabidopsis argonaute complexes is directed by the 5′ terminal nucleotide. Cell. 2008;133:116–27.
 Candar‐Cakir B, Arican E, Zhang B. Small RNA and degradome deep sequencing reveals drought‐and tissue‐specific microRNAs and their important roles in drought‐sensitive and drought‐tolerant tomato genotypes. Plant Biotechnol J. 2016;14:1727–46.
 Giusti L, Mica E, Bertolini E, De Leonardis AM, Faccioli P, Cattivelli L, et al. microRNAs differentially modulated in response to heat and drought stress in durum wheat cultivars with contrasting water use efficiency. Funct Integr Genomic. 2017;17:293–309.
 Zhang BH, Pan XP, Cannon CH, Cobb GP, Anderson TA. Conservation and divergence of plant microRNA genes. Plant J. 2006;46:243–59.
 Han Y, Li A, Li F, Zhao M, Wang W. Characterization of a wheat (Triticum aestivum L.) expansin gene, TaEXPB23, involved in the abiotic stress response and phytohormone regulation. Plant Physiol Bioch. 2012;54:49–58.
 Hussain HA, Hussain S, Khaliq A, Ashraf U, Anjum SA, Men S, et al. Chilling and drought stresses in crop plants: implications, cross talk, and potential management opportunities. Front Plant Sci. 2018;9:393.
 Luan Y, Wang W, Liu P. Identification and functional analysis of novel and conserved microRNAs in tomato. Mol Biol Rep.2014;41:5385–94.
 Sunkar R, Kapoor A, Zhu JK. Posttranscriptional induction of two Cu / Zn superoxide dismutase genes in Arabidopsis is mediated by downregulation or miR398 and important for oxidative stress tolerance. Plant Cell. 2006;18:2051–65.
 Guilfoyle TJ, Hagen G. Auxin response factors. Curr Opin Plant Biol. 2007;10:453–60
 Kumar R. Role of microRNAs in biotic and abiotic stress responses in crop plants. Appl Biochem Biotech. 2014;174:93–115.
 Omidbakhshfard MA, Proost S, Fujikura U, Mueller-Roeber B. Growth-regulating factors (GRFs): a small transcription factor family with important functions in plant biology. Mol plant. 2015;8:998–1010.
 Rasmussen S, Barah P, Suarez-Rodriguez MC, Bressendorff S, Friis P, Costantino P, et al. Transcriptome responses to combinations of stresses in Arabidopsis thaliana. Plant Physiol. 2013;161:1783–94.
 Zandalinas SI, Rivero RM, Martínez V, Gómez-Cadenas A, Arbona V. Tolerance of citrus plants to the combination of high temperatures and drought is associated to the increase in transpiration modulated by a reduction in abscisic acid levels. BMC Plant Biol. 2016;16:105.
 Choudhury FK, Rivero RM, Blumwald E, Mittler R. Reactive oxygen species, abiotic stress and stress combination. Plant J. 2017;90:856–67.
 Kartha RV, Subramanian S. Competing endogenous RNAs (ceRNAs): new entrants to the intricacies of gene regulation. Front Genet. 2014;5:8.