RT Journal Article
T1 Plant–pathogen interactions: Sugarcane glycoproteins inducechemotaxis of smut teliospores by cyclic contraction and relaxation of the cytoskeleton
A1 Sánchez Elordi, Elena
A1 Vicente Manzanares, M.
A1 Díaz Peña, Eva María
A1 Legaz González, María Estrella
A1 Vicente Córdoba, Carlos
AB A fraction of active glycoproteins isolated from sugarcane cultivars resistant to smut (Sporisorium scitamineum) contains several peptides with different biological activities. One of these proteins is active as a positive chemotactic stimulus on smut teliospores. The displacement of teliospores in a liquid medium to a source containing these glycoproteins describes a Gaussian kinetic both versus time and versus the amount of glycoprotein used as a stimulating agent. Confocal and both transmission and scanning electronic microscopy show that the displacement of teliospores toward glycoprotein source is achieved by consecutive episodes of cell contraction–relaxation in which the cytoskeleton is involved. The chemotactic movement of teliospores is strongly inhibited by phalloidin and latrunculin A, which implies F-actin polymerization and depolymerization cycles, and by blebbistatin, which implies a contractile protein similar to a myosin II, responsible for the contraction–relaxation of the cytoskeleton. Both proteins have been revealed by Western blot. In addition, microtubules seem to be also involved in the process since nocodazole inhibits chemotactic displacement. Fungal teliospores secrete several of their own proteins to the incubation media that increase teliospore germination and cytoagglutination although they are inactive to induce displacement.
PB Elsevier
SN 0254-6299
YR 2016
FD 2016-07
LK https://hdl.handle.net/20.500.14352/23260
UL https://hdl.handle.net/20.500.14352/23260
LA eng
NO Unión Europea. FP7
NO Ministerio de Economía y Competitividad (MINECO)
NO MEC/MCTI/CAPES/CNPq/FAPs (Brazil)
NO Fundación Ramon Areces
DS Docta Complutense
RD 10 abr 2025