Genome-Wide Characterization of the ScLOR Gene Family in Wild Tomato Solanum lycopersicoides Reveals ScLOR16 as a Negative Regulator of Cold-and Drought-Stress Tolerance
Overall, ScLOR16 is likely involved in the modulation of cold and drought stress responses, and characterizes evolutionary features of the LOR family and provides basic insights for studying stress-adaptation mechanisms in Solanum lycopersicoides.
Abstract
Simple Summary The LOR gene family’s abiotic stress functions are largely unknown in wild tomato. We identified 19 ScLOR genes from stress-tolerant Solanum lycopersicoides and performed comprehensive bioinformatic analyses. Their promoters contain abundant ABA, cold and drought responsive cis-elements. RT-qPCR revealed ScLOR16 was sharply induced by cold and drought. Subcellular localization showed ScLOR16 localizes in the nucleus and cytoplasm. VIGS of ScLOR16 alleviated leaf wilting under cold and drought. Silenced plants had higher SOD/POD activity, more proline and lower TBARS, indicating stronger antioxidant and osmotic protection. Overall, ScLOR16 is likely involved in the modulation of cold and drought stress responses. This work characterizes evolutionary features of the LOR family and provides basic insights for studying stress-adaptation mechanisms in Solanum lycopersicoides.
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