RT Journal Article
T1 Spent coffee grounds as a source of smart biochelates to increase Fe and Zn levels in lettuces
A1 Cervera-Mata, Ana
A1 Fernandez-Arteaga, Alejandro
A1 Navarro-Alarcon, Miguel
A1 Hinojosa, Daniel
A1 Pastoriza, Silvia
A1 Delgado, Gabriel
A1 Angel Rufian-Henares, Jose
K1 Spent coffee grounds
K1 Melanoidins
K1 Bio-fortification
K1 Micronutrients
K1 Lettuce
K1 Antimicrobial activity
K1 Chelating substance
K1 Zinc
K1 Iron
K1 Melanoidins
K1 L.
K1 Biofortification
K1 Amendment
K1 Residues
K1 Quality
AB Spent coffee grounds (SCG), an ever-increasing food waste whose annual generation is 15 million tons, have the potential to fulfil many different purposes after being recycled. However, though SCG have been used as soil organic amendment, their utilization is limited by their phytotoxic nature. Although SCG favour the assimilation of nutrients by plants, whether or not they could be used as an agronomical bio-fortifying agent has not been investigated yet. Therefore, we carried out an in vitro investigation to analyse the influence of SCG and coffee melanoidins functionalized with Fe and Zn (biochelates) on the agronomic biofortification of lettuce (Lactuca sativa var. longifolia), one of the most consumed edible plants worldwide. Commercial chelates (EDDHA-Fe and EDTA-Zn) and non-functionalized SCG and melanoidins were used as controls. Total Fe and Zn content in lettuces and available Fe and Zn in soil were measured. Functionalized SCG and melanoidins were able to significantly increase both Fe and Zn levels in lettuces. While Fe levels increased around 28-30%, Zn showed a much larger improvement with levels up to 177-416% higher. According to our results, both SCG and coffee melanoidins could be used as agronomical bio-fortifying agents. Additionally, bio-fortified lettuce would provide up to a 16.3% of the Fe recommended daily intake and up to a 6.6% of that of Zn, reflecting positively in human health.
PB Elsevier sci ltd
SN 0959-6526
YR 2021
FD 2021-12-15
LK https://hdl.handle.net/10668/27748
UL https://hdl.handle.net/10668/27748
LA en
DS RISalud
RD Apr 17, 2025