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Growth Stimulation Activity of Alginate-Derived Oligosaccharides with Different Molecular Weights and Mannuronate/Guluronate Ratio on Hordeum vulgare L
Journal of Plant Growth Regulation ( IF 4.8 ) Pub Date : 2020-02-04 , DOI: 10.1007/s00344-020-10078-4
Jieru Yang , Zhaopeng Shen , Zhanyi Sun , Peng Wang , Xiaolu Jiang

The differentiated components of alginate-derived oligosaccharides (AOS) lead to different activities on plant. Optimizing AOS use efficiency is, therefore, of major importance for the implementation of precision agriculture. Effects of AOS on biophysical characteristics and growth and development of barley (Hordeum vulgare L.) have been investigated. The experiments were conducted by soaking the seeds in AOS solutions with different molecular weights and Mannuronate/Guluronate ratio. The results showed that depending on their components, AOS stimulated the growth of seedlings and roots differently. AOS with low MW (500–3000 Da) and higher M/G ratio (> 1) had better promotion on the plant. The promoting effects on seedlings and roots were not an exact match. Our results suggested that the promotion effects of AOS on seedlings might be caused by the stimulation on photosynthesis and the roots growth were promoted probably due to the enhanced absorption activity. In gene level, we demonstrated that AOS induced the expression of development-related genes including auxin response factor and mitogen-activated protein kinase, thereby promoting the growth. Our research may provide a basis for more targeted and precise use of AOS in agriculture.

中文翻译:

不同分子量和甘露糖醛酸/古洛糖酸比的海藻酸盐衍生低聚糖对大麦的促生长活性

藻酸盐衍生的低聚糖 (AOS) 的不同成分导致对植物的不同活性。因此,优化 AOS 的使用效率对于精准农业的实施至关重要。已经研究了 AOS 对大麦 (Hordeum vulgare L.) 生物物理特性和生长发育的影响。通过将种子浸泡在具有不同分子量和甘露糖醛酸/古洛糖酸比的 AOS 溶液中进行实验。结果表明,根据它们的成分,AOS 对幼苗和根的生长有不同的刺激作用。具有低 MW (500–3000 Da) 和较高 M/G 比 (> 1) 的 AOS 对植物有更好的促进作用。对幼苗和根系的促进作用不完全匹配。我们的研究结果表明,AOS 对幼苗的促进作用可能是由于刺激光合作用引起的,而促进根系生长可能是由于吸收活性增强。在基因水平上,我们证明AOS诱导发育相关基因的表达,包括生长素反应因子和丝裂原活化蛋白激酶,从而促进生长。我们的研究可能为在农业中更有针对性和更精确地使用 AOS 提供基础。
更新日期:2020-02-04
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