Rivera Paola, Moya Cristian, O'Brien José A
Departamento de Genética Molecular y Microbiología, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Santiago 8331150, Chile.
Departamento de Fruticultura y Enología, Facultad de Agronomía e Ingeniería Forestal, Pontificia Universidad Católica de Chile, Santiago 7820436, Chile.
Plants (Basel). 2022 Mar 18;11(6):807. doi: 10.3390/plants11060807.
Climate change together with excessive fertilization and poor water quality can affect soil quality and salinization. In plants, high salinity causes osmotic stress, ionic toxicity, and oxidative stress. Consequently, salt stress limits plant development, growth, productivity, and yield. Tomatoes are a very common agricultural product, and some cultivars can partially tolerate salinity. However, most studies are focused on salt excess, which does not necessarily extrapolate on how plants develop in soils with low concentrations of salts. Thus, this study characterizes plant growth and the development of different salt concentrations from 25 to 200 mM in cv. Moneymaker. Tomato seedlings grown in Murashige and Skoog medium supplied with different NaCl concentrations (0, 25, 50, 75, 100, 125, 150, 175, and 200 mM) showed that low salt concentrations (25 and 50 mM) have a positive impact on lateral root development. This was further observed in physiological parameters such as shoot length, primary root length, and proliferation of lateral roots versus controls. Interestingly, no significant changes in Na concentration were observed in 25 mM NaCl in roots or shoots versus controls. Overall, our results suggest that non-toxic salt concentrations can have a positive impact on plant development.
气候变化、过度施肥以及水质不佳会影响土壤质量和盐碱化。在植物中，高盐度会导致渗透胁迫、离子毒性和氧化应激。因此，盐胁迫会限制植物的发育、生长、生产力和产量。番茄是一种非常常见的农产品，一些品种能够部分耐受盐度。然而，大多数研究都集中在盐分过量的情况，这不一定能推断出植物在低盐浓度土壤中的生长情况。因此，本研究对金钱番茄品种在25至200 mM不同盐浓度下的植物生长和发育进行了表征。在添加不同NaCl浓度（0、25、50、75、100、125、150、175和200 mM）的Murashige和Skoog培养基中生长的番茄幼苗表明，低盐浓度（25和50 mM）对侧根发育有积极影响。在诸如茎长、主根长度以及侧根增殖与对照相比的生理参数中进一步观察到了这一点。有趣的是，与对照相比，在25 mM NaCl处理下，根或茎中的Na浓度没有观察到显著变化。总体而言，我们的结果表明无毒盐浓度对植物发育可能有积极影响。
