RT Journal Article
T1 Pelargonic acid’s interaction with the auxin transporter PIN1: A potential mechanism behind its phytotoxic effects on plant metabolism
A1 López González, David
A1 Muñoz Usero, Marta
A1 Hermida Ramón, José Manuel
A1 Álvarez Rodríguez, Sara
A1 Araniti, Fabrizio
A1 Teijeira Bautista, Marta
A1 Verdeguer, Mercedes
A1 Sánchez Moreiras, Adela María
K1 2306 Química Orgánica
AB Pelargonic acid (PA) is a saturated fatty acid commonly found in several organisms, that is known for its phytotoxic effect and its use as bioherbicide for sustainable weed management. Although PA is already commercialised as bioherbicide, its molecular targets and mode of action is unknown according to the Herbicide Resistance Action Committee. Therefore, the aim of this work was focusing on the way this natural active substance impacts the plant metabolism of the model species Arabidopsis thaliana. PA caused increase of secondary and adventitious roots, as well as torsion, loss of gravitropism and phytotoxic effects. Moreover, PA altered the cellular arrangement and the PIN proteins activity. Computational simulations revealed that the intermolecular interactions between PA and the polar auxin transporter protein PIN1 are very similar to those established between the natural auxin IAA and PIN1. However, under intracellular conditions, the PA-PIN1 binding is more energetically stable than the IAA-PIN1. These results suggest that PA could act as an auxin-mimics bioherbicide. The exogenous application of PA would be responsible for the alterations observed both at structural and ultrastructural levels, which would be caused by the alteration on the transport of auxins into the plant, inducing root inhibition and ultimately total stop of root growth.
PB Plant Science
SN 01689452
YR 2024
FD 2024-12
LK http://hdl.handle.net/11093/8659
UL http://hdl.handle.net/11093/8659
LA eng
NO Plant Science, 349, 112278 (2024)
NO Agencia Estatal de Investigación | Ref. RTI2018–094716-B-I00
DS Investigo
RD 20-abr-2025