Room: Poster Area
Date: Wednesday, 20 May 2026
Time: 09:00 - 10:00 CEST
Session code 6BV.2
Biomass conversion into bio-based chemicals and high-value compounds (part 1)
Humic Acid Extracted from Sugarcane Filter Cake Enhances Early-Stage Phosphate Uptake and Modulates Hormonal and Transporter Responses in Tomato under Low-Phosphorus Conditions
Short Introductive summary
Phosphate (Pi) deficiency is a major constraint on plant productivity, particularly in highly weathered tropical soils such as Oxisols and Ultisols, where Pi is immobilized by iron and aluminum oxihydroxides. In the sugarcane-producing region of Campos dos Goytacazes (Rio de Janeiro, Brazil), soil fertility has declined severely, with low organic matter ( 1%) and available P (~ 4 mg L?¹). Enhancing Pi acquisition under these conditions is essential for sustainable agriculture. Plants respond to Pi limitation by modifying root morphology, activating high-affinity phosphate transporters, and adjusting hormonal signaling. Humic substances (HS)—complex organic fractions of decomposed organic matter—can improve Pi uptake by increasing its solubility and stimulating root development through auxin- and H?-ATPase–mediated pathways. Humic acid (HA), a major HS fraction, acts as a biostimulant that enhances plant growth and nutrient efficiency via physiological and molecular mechanisms. In this study, HA-like material extracted from sugarcane filter cake (a sugar industry by-product) was tested as a sustainable biostimulant aligned with circular economy principles. The research aimed to (
Presenter
Keiji JINDO
Wageningen University and Research, THE NETHERLANDS
Biographies and Short introductive summaries are supplied directly by presenters and are published here unedited
Co-authors:
L Pasqualoto Canellas, UENF, Rio De Janeiro State, BRAZIL
L. Pereira Peres, Wageningen University and Research, Sao Paulo State, BRAZIL
N. Aguiar Canellas, UENF, Rio De Janeiro State, BRAZIL
D. Villarinho Pessoa, UFRJ, Rio De Janeiro State, BRAZIL
R. Sanchez Pacheco, UFRJ, Rio De Janeiro State, BRAZIL
F. Lopes Olivares, UENF, Rio De Janeiro State, BRAZIL
J. Simoes-Araujo, EMBRAPA, Rio De Janeiro State, BRAZIL
Session reference: 6BV.2.24