关键词: Electron transport rate Leaf-to-root biomass ratio Non-photochemical quenching Oxidation reduction potential Stomatal conductance Water vibrational mode

Mesh : Photosynthesis Water / metabolism Cucumis sativus / growth & development metabolism physiology Lactuca / growth & development metabolism Sorghum / growth & development metabolism Agricultural Irrigation / methods Plant Leaves / metabolism growth & development

来  源:   DOI:10.1016/j.plaphy.2024.108780

Abstract:
The study evaluated the effects of treating irrigation water with a coaxial flow variator (CFV) on the morpho-physiology of pot-cultivated test species, including cucumber (Cucumis sativus, CU), lettuce (Lactuca sativa, LE), and sorghum (Sorghum vulgare, SO), in early stages of growth. CFV caused a lower oxidation reduction potential (ORP), increased pH and flow resistance and inductance. It induced changes in the absorbance characteristics of water in specific spectral regions, likely associated with greater stretching and reduced bending vibrations compared to untreated water. While assimilation rate and photosynthetic efficiency were not significantly affected at 60 days after sowing, treated water increased the stomatal conductance to water vapour gsw (+79%) and the electron transport rate ETR (+10%) in CU, as well as the non-photochemical quenching NPQ (+33%) in SO. Treated water also reduced leaf temperature in all species (-0.86 °C on average). This translated into improved plant biomass (leaves: +34%; roots: +140%) and reduced leaf-to-root biomass ratio (-42%) in SO, allowing both faster aerial growth and soil colonization, which can be exploited to improve plant tolerance against abiotic stresses. In the C3 species CU and LE, plant biomass was instead reduced, although significantly in LE only, while the leaf-to-root biomass ratio was generally enhanced, a result likely profitable in the cultivation of leafy vegetables. This is a preliminary trial on the effects of functionalized water and much remains to be investigated in other physiological processes, plant species, and growth stages for the full exploitation of this water treatment in agronomy.
摘要:
该研究评估了用同轴变流器(CFV)处理灌溉水对盆栽试验物种形态生理的影响,包括黄瓜(黄瓜,CU),生菜(Lactucasativa,LE),和高粱(高粱,SO),在成长的早期阶段。CFV导致较低的氧化还原电位(ORP),增加pH值、流动阻力和电感。它引起了水在特定光谱区域的吸光度特性的变化,与未经处理的水相比,可能与更大的拉伸和减少的弯曲振动有关。播种后60天,同化率和光合效率没有显着影响,处理后的水增加了Cu中对水蒸气gsw的气孔导度(+79%)和电子传递率ETR(+10%),以及SO中的非光化学猝灭NPQ(+33%)。处理过的水也降低了所有物种的叶片温度(平均-0.86°C)。这转化为改善的植物生物量(叶:34%;根:140%)和降低的叶与根生物量比(-42%),允许更快的空中生长和土壤定植,可用于提高植物对非生物胁迫的耐受性。在C3物种CU和LE中,植物生物量反而减少了,虽然仅在LE中显著,虽然叶与根的生物量比普遍提高,结果可能有利于叶类蔬菜的种植。这是对官能化水的影响的初步试验,还有许多在其他生理过程中有待研究,植物物种,和生长阶段,以便在农学中充分开发这种水处理。
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