Project description:We performed a transcriptomic analysis on two tomato genotypes, M82 and Tondo, in response to a PEG-mediated osmotic treatment, mimicking water stress. The analysis was conducted separately on leaves and roots to characterize the specific response of these two organs. A total of 6,267 differentially expressed transcripts related to osmotic stress response was detected. The construction of gene co-expression networks defined the metabolic and signaling pathways of the common and specific responses of leaf and root. The common response was characterized by ABA-dependent and ABA-independent signaling pathways, and by the interconnection between ABA and JA signaling. The root specific response concerned genes involved in cell wall metabolism and remodeling, whereas the leaf specific response was principally related to leaf senescence and ethylene signaling. The transcription factors representing the hubs of these regulatory networks were identified. Some of them have not yet characterized and can represent novel candidates for tolerance. Finally, several genes showing a genotype-specific expression regulation in response to the treatment were detected. These genes may be involved in the different sensitivity to the osmotic treatment of the two tomato genotypes. In conclusion, this work shed new light on the regulatory networks occurring in tomato leaf and root under osmotic stress and set the base for an in-depth characterization of novel stress-related genes, that may represent potential candidates for improving tolerance to water stress in tomato.
Project description:We have used cDNA-AFLP and microarray analyses to profile the response of the tomato meiotic anther transcriptome to moderate heat stress condition in Moneymaker or Falcorosso and HeatSet1 tomato genotype.
Project description:Excess levels of Al3+ become highly harmful to plant roots as the toxic ions bind to the surface of root-tips. Plants can acquire tolerance to stress after multiple generations of exposure to stress conditions. After four consecutive generations of Al treatments (G4Al+ seeds), tomato plants appeared more tolerant to the stress condition. This project used laser capture microdissection (LCM) technology to isolate the Al-sensitive epidermal and outer cortical cells of root-tips. Tandem mass tag (TMT) proteomics analysis was conducted to identify proteomics changes related to the physiological properties in root growth under Al treated conditions.
Project description:This study assayed the gene expression changes in response to chilling stress in the shoots and roots of tomato seedlings. Both a pretreatment and a concurrent ambient control were sampled to contrast gene expression.
Project description:The Fusarium incarnatum strain K23, originally isolated from a habit-adapted wild plant Thapsia species, colonized the roots and shoots of tomato seedlings and protected them against salt stress. Comparison of expression and metabolite profile changes uncovered that the fungus completely reprogramed the tomato response to salt stress. Barely any overlap was observed among the genes and metabolites which are regulated by salt stress in uncolonized and colonized tomato seedlings. In colonized seedlings exposed to salt stress, less stress- related genes are activated than in un-colonized seedlings. Furthermore, K23 produced gibberellin and gibberellin-responsive genes were detected in all RNA samples. Our analysis demonstrates that K23 colonisation completely alters the salt-responsive gene and metabolite profiles in tomato seedlings.
Project description:Tomato, a Strategy I model plant for Fe deficiency, is an important economical crop. The transcriptional responses induced by Fe deficiency in tomato roots were previously described (Zamboni et al., 2012). The changes in trascriptome caused by the supply of Fe to plants starved fro 1 week were described in relation to the different nature of chelating agents (Fe-WEHS, Fe-CITRATE and Fe-PS). Transcriptional profile obtained by roots (27-d) of 21-d-old tomato plants starved of iron (0 μM Fe-EDTA) for 1 week and supplied for 1 h with 1 μM of Fe as Fe-WEHS (supply_Fe_WEHS), Fe citrate (supply_Fe_CITRATE) and Fe-PS (supply_Fe_PS). Tomato plants were hydroponically grown in all three case of Fe supply. Three different biological replicates were used for each sample repeating the experiment three times. All samples were obtained pooling roots of six plants (27-d-old).
Project description:The purpose of this dataset is to generate a transcriptomic series of staged non-induced lateral root intiation in M82 tomato. Sections of the primary roots containing lateral roots at 5 different developemental stages (staged by their anatomy and expression of the auxin response marker DR5) were collected.
Project description:Tomato, a Strategy I model plant for Fe deficiency, is an important economical crop. The transcriptional responses induced by Fe deficiency in tomato roots were previously described (Zamboni et al., 2012). The changes in trascriptome caused by the supply of Fe to plants starved fro 1 week were described in relation to the different nature of chelating agents (Fe-WEHS, Fe-CITRATE and Fe-PS).
Project description:Transcription profiling of roots and shoots of tomato plants as a result of systemic infection with the tospovirus Tomato Spotted Wilt Virus (TSWV).