Accessing the Efficacy of Sargassum-Based Aqueous Phase Products Derived from Hydrothermal Carbonisation and Hydrothermal Liquefaction on Plant Growth
Accessing the Efficacy of Sargassum-Based Aqueous Phase Products Derived from Hydrothermal Carbonisation and Hydrothermal Liquefaction on Plant Growth
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DOI：
10.3390/phycology4010003
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发表时间：
2024-01
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影响因子：
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通讯作者：
James Smith;A. Pilsbury;Vinod Kumar;Eleni E. Karamerou;C. Chuck;Leopoldo N. Herrera-Rodriguez;Julio V
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文献类型：
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作者：
James Smith;A. Pilsbury;Vinod Kumar;Eleni E. Karamerou;C. Chuck;Leopoldo N. Herrera-Rodriguez;Julio V
大量的马尾藻泛滥为容易获得的生物质作为作物富集应用创造了机会。然而，马尾藻的重金属含量对作物管理和随后的人类消费构成严重关切。水热处理可以破坏原料成分，通过利用高温和高压使重金属分离。因此，可以产生看似营养丰富的相。元素分析表明，马尾藻衍生的馏分含有重要的宏量和微量营养素的植物，特别是铵，正磷酸盐和钾，使它们成为植物生长的潜在营养源。到目前为止，还没有研究从生物利用度或生物毒性的角度调查水热处理的马尾藻产品的植物生长潜力。我们试图确定水相产品通过水热碳化和液化海藻加工后是否对高等植物有毒，以及它们是否可以支持植物生长。浓度≥1%的水相产物抑制拟南芥植物的根生长和侧根形成，可能是由于抑制化合物的存在。然而，浓度≤0.1%的水相产品与已确定的营养混合物搭配可能会改善叶和根的生长。HTC和HTL都能够引起改善的叶子生长，而只有HTC诱导改善的根生长。总而言之，水相产品缺乏营养效力以允许高稀释用于其自身的肥料施用，并且可能含有在高浓度下阻止植物生长的抑制性化合物。然而，它们可能具有作为添加剂提取物的目的。植物生长所需的重要元素的回收为不同原料的水热处理的未来应用开辟了一条有前途的道路。
Mass Sargassum inundations have created opportunities for readily available biomass to be used as a crop enrichment application. However, the heavy metal contents of Sargassum pose serious concerns for crop administration and subsequent human consumption. Hydrothermal processing can break the feedstock components, allowing heavy metals to be partitioned, through the utilisation of high temperatures and pressures. As a result, seemingly nutrient-rich phases can be produced. Elemental analyses showed that Sargassum-derived fractions contain important macro- and micronutrients for plants, particularly ammonium, orthophosphate, and potassium, making them potential nutrient sources for plant growth. To date, no research has investigated the plant growth potential of hydrothermally processed Sargassum products from a bioavailability or biotoxicity perspective. We seek to determine if the aqueous phase products derived following Sargassum processing by hydrothermal carbonisation and liquefaction are toxic to higher plants, and if they can support plant growth. Aqueous phase products in ≥1% concentrations inhibit root growth and lateral root formation in Arabidopsis plants, likely from the presence of inhibitory compounds. However, aqueous phase products in ≤0.1% concentrations paired with an established nutrient mix may provide improved leaf and root growth. Both HTC and HTL were capable of eliciting improved foliage growth, while only HTC induced improved root growth. Conclusively, aqueous phase products lack nutrient potency to allow high dilutions for fertiliser application on their own and may contain inhibitory compounds that deter plant growth at high concentrations. However, they might have a purpose as an additive extract. The recovery of important elements needed for plant growth draws a promising path for future applications of hydrothermal processing with different feedstocks.