Salinity intrusion is one of the biggest problems in the context of sustainable agricultural practices. The major concern and challenge in developing salt-resistance in cultivated crops is the genetic complexity of the trait and lack of natural variability for stress-responsive traits. In this context, tomato wild relatives are important and have provided novel alleles for breeding abiotic stress tolerance including salt tolerance. We provide here a case study, involving tomato wild relative Solanum chilense and cultivated variety Solanum lycopersicum, carried out under high salt stress to investigate comparative transcriptional regulation mediating ROS homeostasis and other physiological attributes. Salt dependent oxidative stress in S. lycopersicum was characterized by a relatively higher H₂O₂ content, generation of O₂⁻, electrolytic leakage and lipid peroxidation whereas reduced content of both ascorbate and glutathione. On the contrary, the robust anti-oxidative system in the S. chilense particularly counteracted the salt-induced oxidative damages by a higher fold change in expression profile of defense-related salt-responsive genes along with the increased activities of anti-oxidative enzymes. We conclude that S. chilense harbours novel genes or alleles for salt stress-related traits that could be identified, characterized, and mapped for its possible introgression into cultivated tomato lines.

在可持续的农业实践中，盐分入侵是最大的问题之一。在栽培作物中发展抗盐性的主要关注和挑战是该性状的遗传复杂性以及对胁迫响应性状缺乏自然变异性。在这种情况下，番茄野生近缘种很重要，并为培育包括盐耐性在内的非生物胁迫耐受性提供了新的等位基因。我们在这里提供一个案例研究，涉及番茄野生亲缘茄和栽培品种茄属番茄，在高盐胁迫下进行，以研究介导ROS稳态和其他生理特性的比较转录调控。在盐依赖性氧化应激的S.lycopersicum的特点是相对较高的ħ ₂ ö ₂含量，产生的O- ₂ ^- ，电解质渗漏和脂质过氧化而降低两者抗坏血酸和谷胱甘肽的含量。相反，S。chilense中强大的抗氧化系统通过防御相关盐响应基因的表达谱更高的倍数变化以及抗氧化酶活性的增加，特别抵消了盐诱导的氧化损伤。我们得出的结论是，S。chilense含有与盐胁迫相关性状的新基因或等位基因，可以对其进行鉴定，表征和作图，以了解其可能渗入栽培的番茄系。