Ethylene and ROS Signaling Are Key Regulators of Lateral Root Development under Salt Stress in Tomato
Authors: Rahmati Ishka, M., Zhao, J., Sussman, H., Mohanty, D., Craft, E., Yu, L., Pineros, M., Tester, M., Kawa, D., Mittler, R., Nelson, A., Fei, Z., Julkowska, M. M.
The study examined salt-induced alterations in root system architecture across a diverse panel of wild and cultivated tomato accessions, identifying tolerant varieties with distinct lateral root strategies. By combining Bulk Segregant Analysis of an F2 population with GWAS, the authors pinpointed 22 candidate genes, further narrowing to two key regulators through RNA‑Seq and functional assays involving ethylene and ROS profiling. These findings reveal genetic targets for improving salt resilience in tomato root development.
Conservation and divergence of regulatory architecture in nitrate-responsive plant gene circuits
Authors: Bian, C., Demirer, G. S., Oz, M. T., Cai, Y., Witham, S., Mason, G. A., Di, Z., Deligne, F., Zhang, P., Shen, R., Gaudinier, A., Brady, S., Patron, N.
The study dissects a six‑gene regulatory sub‑circuit upstream of the nitrogen‑sensing transcription factors NLP6/7 in Arabidopsis, revealing multiple multi‑node feedforward loops that control NITRITE REDUCTASE 1 expression and root system architecture. Comparative analysis shows both conservation and divergence of this circuit in tomato, and genetic and in‑planta assays confirm the network’s functional relevance under varying nitrate conditions.