Agriculture Department, Mediterranea University, Feo di Vito, 89122, Reggio Calabria, Italy.
High Agronomic Institute of Chott Mariem, University of Sousse, Tunisia.
Plant Physiol Biochem. 2018 Nov;132:465-474. doi: 10.1016/j.plaphy.2018.09.033. Epub 2018 Sep 29.
Salinity is an abiotic stress which seriously affects crop production over the world, particularly in arid and semi-arid regions, with harmful effects on germination, growth and yield. Maize (Zea mays L.), cultivated in a wide spectrum of soil and climatic conditions, is the third most important cereal crop after rice and wheat, moderately sensitive to salt stress. A saline level more than 250 mM NaCl damages maize plants, causing severe wilting. In this study, the effects of hydro-priming (distilled water) and bio-priming (Rosmarinus officinalis L. and Artemisia L. leaf extracts) on seed germination and seedling growth of maize, under 100 mM NaCl salinity were investigated. The factorial experiments were carried out in greenhouse under controlled condition (25 °C in 12/12 h day/night) based on a completely randomized design with three replicates. Results showed that both hydro- and bio-priming increased germination percentage and germination indexes in maize seeds. Rosmarinus extract was the most effective in inducing salt resistance in 30 days old seedlings, with beneficial effects in the strengthening of the antioxidant system and in the maintenance of a higher photosynthetic efficiency under salt stress condition.
盐度是一种非生物胁迫，严重影响着全球的作物生产，特别是在干旱和半干旱地区，对种子发芽、生长和产量都有有害影响。玉米（Zea mays L.）在广泛的土壤和气候条件下种植，是仅次于水稻和小麦的第三大重要谷类作物，对盐胁迫中度敏感。盐度超过 250mM NaCl 会损害玉米植株，导致严重萎蔫。在这项研究中，研究了水引发（蒸馏水）和生物引发（迷迭香和艾蒿叶提取物）对 100mM NaCl 盐胁迫下玉米种子发芽和幼苗生长的影响。基于完全随机设计，在温室中进行了析因实验，在受控条件下（12/12 小时光照/黑暗，25°C）进行了 3 次重复。结果表明，水引发和生物引发都提高了玉米种子的发芽率和发芽指数。迷迭香提取物在诱导 30 天大的幼苗耐盐性方面最为有效，在增强抗氧化系统和维持盐胁迫条件下更高的光合作用效率方面具有有益作用。
