NAC transcription factor JUNGBRUNNEN1 enhances drought tolerance in tomato

• DOI: 10.1111/pbi.12776
• Publication Date: 2017-06-22T16:58:36Z
• Authors: Venkatesh P. Thir...; Vikas Devkar; Nikolay Mehterov; Shawkat Ali; Rengin Ozgur; Ismail Turkan; Bernd Mueller‐Roeber; Salma Balazadeh
• Keywords: 0301 basic medicine; ddc:540; Arabidopsis; drought; tomato; Tomato; 03 medical and health sciences; Solanum lycopersicum; Gene Expression Regulation, Plant; transcription factor; Research Articles; Plant Proteins; reactive oxygen species; 2. Zero hunger; 0303 health sciences; Drought; 15. Life on land; Della; Plants, Genetically Modified; 6. Clean water; Droughts; Institut für Chemie; Transcription factor; DELLA; Reactive oxygen species; Reactive Oxygen Species; Transcription Factors

Water deficit (drought stress) massively restricts plant growth and the yield of crops; reducing deleterious effects drought is therefore high agricultural relevance. Drought triggers diverse cellular processes including inhibition photosynthesis, accumulation cell-damaging reactive oxygen species gene expression reprogramming, besides others. Transcription factors (TF) are central regulators transcriptional reprogramming many TF genes affected by drought, members NAC family. Here, we identify factor JUNGBRUNNEN1 (JUB1) as a regulator tolerance in tomato (Solanum lycopersicum). Expression JUB1 (SlJUB1) enhanced various abiotic stresses, drought. Inhibiting SlJUB1 virus-induced silencing drastically lowers concomitant with an increase ion leakage, elevation hydrogen peroxide (H2 O2 ) levels decrease drought-responsive genes. In contrast, overexpression AtJUB1 from Arabidopsis thaliana increases tomato, alongside higher relative leaf water content during reduced H2 levels. was previously shown to stimulate DREB2A, involved responses, DELLA GAI RGL1. We show here that similarly controls orthologs SlDREB1, SlDREB2 SlDELLA. Furthermore, directly binds promoters SlDELLA tomato. Our study highlights suggests considerable conservation stress-related regulatory networks controlled this between