Fedeli Riccardo, Cruz Cristina, Loppi Stefano, Munzi Silvana
BioAgry Lab, Department of Life Sciences, University of Siena, 53100 Siena, Italy.
Centre for Ecology, Evolution and Environmental Changes, Faculdade de Ciências, Universidade de Lisboa, 1749-016 Lisbon, Portugal.
Plants (Basel). 2024 Feb 3;13(3):447. doi: 10.3390/plants13030447.
The addition of biostimulants to nutrient solutions of hydroponically grown crops to speed up plant growth and improve plant yield and quality has been attracting more and more attention. This study investigated the effects of wood distillate (WD) addition to hydroponically grown lettuce ( L.) plants. Two concentrations of WD, 0.2% and 0.5%, were added to the nutrient solution, and biometric (i.e., leaf fresh weight, root fresh weight, root length and root surface area), photosynthetic (i.e., chlorophyll , chlorophyll , and carotenoid content) and biochemical (i.e., electrolyte leakage, total polyphenols, total flavonoids, and total antioxidant power content) parameters were evaluated. The effects of WD were hormetic, as the 0.2% concentration stimulated biometric and biochemical parameters, while the 0.5% concentration inhibited plant growth. Based on these results, it can be suggested that the addition of 0.2% WD to the nutrient solution has a stimulating effect on the growth of lettuce plants, and could be a successful strategy to boost the yield of crops grown hydroponically.
向水培作物的营养液中添加生物刺激剂以加速植物生长、提高植物产量和品质，这一做法已越来越受到关注。本研究调查了向水培生菜植株添加木馏油（WD）的效果。向营养液中添加了两种浓度的WD，分别为0.2%和0.5%，并对生物特征参数（即叶片鲜重、根鲜重、根长和根表面积）、光合参数（即叶绿素a、叶绿素b和类胡萝卜素含量）和生化参数（即电解质渗漏、总多酚、总黄酮和总抗氧化能力含量）进行了评估。WD的影响呈 hormetic 效应，因为0.2%的浓度刺激了生物特征和生化参数，而0.5%的浓度抑制了植物生长。基于这些结果，可以认为向营养液中添加0.2%的WD对生菜植株的生长有刺激作用，并且可能是提高水培作物产量的一种成功策略。
