Earlier we reported that seed pre-treatment with PHF promoted early seedling growth and salinity tolerance in wheat. As a way forward, experiments were conducted to investigate whether and to what extent foliar spray of fullerol could influence growth and physio-biochemical responses in salt stressed wheat. In a control experiment, seeds were sown in sand filled pots (500 g) under control and 150 mM NaCl stress. After 15 days, foliar spray of fullerol at 0, 10, 40, 80 and 120 nM concentration was applied and the data for various morpho-biochemical attributes recorded after 2 weeks. Fullerol caused improvements in shoot growth attributes while had least effect on root growth traits. Increase in total chlorophyll while reduction in Car/Chl ratio was evident under salinity in response to fullerol spray. Only 40 and 80 nM spray treatments improved antioxidant activities and reduced H₂O₂ contents while MDA contents which increased due to salt stress, remained unaffected by foliar spray. Fullerol spray also improved sugars, proline and free amino acids under salinity. During second experiment under natural conditions, 60 day old plants grown in sand filled pots (10 kg) under 0 and 150 mM NaCl were foliar sprayed with selected concentrations (0, 40 and 80 nM) of fullerol. Salinity inhibited gas exchange and grain yield attributes while fullerol-sprayed plants exhibited recovery. Fullerol spray resulted in high root and shoot K⁺ and shoot Ca²⁺ contents. Also, increase in shoot and root P, while lesser shoot Na⁺ was recorded due to 80 nM spray under salt stress. Overall, 40 and 80 nM fullerol spray improved photosynthetic activity, osmolytes accumulation and altered tissue ion compartmentalization which contributed to improvement in grain yield attributes under salinity.

中文翻译：

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叶面喷施富勒醇通过离子区室化、渗透压调节和酶抗氧化剂的调节，有差异地提高小麦的耐盐性。


早些时候我们报道过，用 PHF 进行种子预处理可促进小麦幼苗的早期生长和耐盐性。作为前进的方向，进行了实验来研究叶面喷施富勒醇是否以及在多大程度上可以影响盐胁迫小麦的生长和生理生化反应。在对照实验中，在对照和 150 mM NaCl 胁迫下将种子播种在装满沙子的盆 (500 g) 中。 15天后，叶面喷施0、10、40、80和120nM浓度的富勒醇，并在2周后记录各种形态生化属性的数据。富勒醇改善了芽的生长特性，同时对根生长特性的影响最小。在富勒醇喷雾的盐度下，总叶绿素增加，而 Car/Chl 比率明显降低。仅40和80 nM喷雾处理提高了抗氧化活性并降低了H ₂ O ₂含量，而由于盐胁迫而增加的MDA含量却不受叶面喷雾的影响。富勒醇喷雾还改善了盐度下的糖、脯氨酸和游离氨基酸。在自然条件下的第二次实验中，将在 0 和 150 mM 氯化钠条件下生长在沙盆（10 kg）中的 60 天大的植物用选定浓度（0、40 和 80 nM）的富勒醇叶面喷洒。盐度抑制气体交换和谷物产量属性，而喷洒富勒醇的植物表现出恢复。富勒醇喷雾导致根部和地上部K ⁺以及地上部Ca ²⁺含量较高。此外，由于盐胁迫下 80 nM 喷雾，芽和根 P 增加，而芽 Na ⁺减少。 总体而言，40 和 80 nM 富勒醇喷雾改善了光合活性、渗透剂积累并改变了组织离子区室化，从而有助于提高盐度下的谷物产量属性。