Abstract：
Transgenerational plasticity in plants enables rapid adaptation to environmental changes, allowing organisms and their offspring to adapt to the environment without altering their underlying DNA. In this study, we investigated the plasticity of transgenerational salinity tolerance of rice plants using a reciprocal transplant experimental strategy. Our aim was to assess whether nongenetic environment-induced phenotypic modifications and transgenerational salinity affect the salinity tolerance of progeny while excluding nuclear genomic factors for two generations. Using salt-tolerant and salt-sensitive rice genotypes, we observed that the parentally salt-stressed salt-sensitive genotype displayed greater growth performance, photosynthetic activity, yield performance, and transcriptional responses than did the parentally nonstressed salt-sensitive plants under salt stress conditions. Surprisingly, salt stress-exposed salt-tolerant progeny did not exhibit as much salinity tolerance as salt stress-exposed salt-sensitive progeny under salt stress. Our findings indicate that the phenotypes of offspring plants differed based on the environment experienced by their ancestors, resulting in heritable transgenerational phenotypic modifications in salt-sensitive genotypes via maternal effects. These results elucidated the mechanisms underlying transgenerational plasticity in salinity tolerance, providing valuable insights into how plants respond to changing environmental conditions.
摘要：
植物的跨代可塑性能够快速适应环境变化，允许生物体及其后代适应环境而不改变其潜在的DNA。在这项研究中,我们使用相互移植实验策略研究了水稻植株的跨代耐盐性的可塑性。我们的目的是评估非遗传环境诱导的表型修饰和跨代盐度是否会影响后代的盐度耐受性，同时排除两代的核基因组因子。利用耐盐和盐敏感水稻基因型，我们观察到，肠胃外盐胁迫盐敏感基因型表现出更大的生长性能，光合活性，产量性能，在盐胁迫条件下，亲本非胁迫盐敏感植物的转录反应。令人惊讶的是,在盐胁迫下，暴露于盐胁迫的耐盐后代的耐盐性不如暴露于盐胁迫的盐敏感后代。我们的发现表明，后代植物的表型根据其祖先经历的环境而有所不同，通过母体效应在盐敏感基因型中产生可遗传的跨代表型修饰。这些结果阐明了盐度耐受性的跨代可塑性的潜在机制，为植物如何应对不断变化的环境条件提供有价值的见解。
