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Transcriptome reprogramming,epigenetic modifications and alternative splicing orchestrate the tomato root response to the beneficial fungus Trichoderma harzianum

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Horticulture Research 2019年第1期6卷 1792-1806页

作者： monica de palma Maria Salzano Clizia Villano Riccardo Aversano Matteo Lorito Michelina Ruocco Teresa Docimo Anna Lisa Piccinelli Nunzio D’Agostino Marina Tucci Institute of Biosciences and BioResources Research Division PorticiNational Research Council80055 PorticiItaly department of Agricultural Sciences University of Naples Federico II80055 PorticiItaly Institute for Sustainable Plant Protection National Research Council80055 PorticiItaly department of Pharmacy University of Salerno84084 FiscianoItaly CREA Research Centre for Vegetable and Ornamental Crops84098 Pontecagnano FaianoItaly

Beneficial interactions of rhizosphere microorganisms are widely exploited for plant biofertilization and mitigation of biotic and abiotic *** provide new insights into the onset of the roots–beneficial microorganisms interplay,we characterised the transcriptomes expressed in tomato roots at 24,48 and 72 h post inoculation with the beneficial fungus Trichoderma harzianum T22 and analysed the epigenetic and post-trascriptional regulation *** detected 1243 tomato transcripts that were differentially expressed between Trichoderma-interacting and control roots and 83 *** transcripts that were differentially expressed between the three experimental time *** with Trichoderma triggered a transcriptional response mainly ascribable to signal recognition and transduction,stress response,transcriptional regulation and *** tomato roots,salicylic acid,and not jasmonate,appears to have a prominent role in orchestrating the interplay with this beneficial *** regulation of many nutrient transporter genes indicated a strong effect on plant nutrition processes,which,together with the possible modifications in root architecture triggered by ethylene/indole-3-acetic acid signalling at 72 h post inoculation may concur to the well-described growth-promotion ability of this ***,***-induced defence priming and stress tolerance may be mediated by the induction of reactive oxygen species,detoxification and defence genes.A deeper insight into gene expression and regulation control provided first evidences for the involvement of cytosine methylation and alternative splicing mechanisms in the plant–Trichoderma interaction.A model is proposed that integrates the plant transcriptomic responses in the roots,where interaction between the plant and beneficial rhizosphere microorganisms occurs.

关键词： roots programming promotion

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Correspondence Analysis on a Space-Time Data Set for Multiple Environmental Variables

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International Journal of Geosciences 2015年第10期6卷 1154-1165页

作者： palma monica Universitá del Salento Lecce Italy

Applications of the multivariate technique called correspondence analysis for environmental studies are relatively new and are limited to spatial multivariate data set. In this paper, a procedure of applying correspondence analysis to a large space-time data set for multiple environmental variables is shown. In particular, nitrogen dioxide and carbon monoxide hourly concentrations measured during January 1999 at several monitored stations in a district of Northern Italy are analyzed. The procedure consists in transforming the continuous variables into categorical ones by the means of appropriate indicator variables, generating special contingency tables and applying correspondence analysis. The use of this classical multivariate technique allows the identification of important relationships among pollution levels and monitoring stations and/or relationships among pollution levels and observation times.

关键词： Space-Time Data Indicator Transform Correspondence Analysis

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