Cerrar

No. de sistema: 000059657

LDR _ _ 00000nab^^22^^^^^za^4500
008 _ _ 191107m20189999xx^^r^p^o^^^^z0^^^a0eng^d
040 _ _ a| ECO
c| ECO
044 _ _ a| xx
245 0 0 a| Effects of amount and recurrence of leaf herbivory on the induction of direct and indirect defences in wild cotton
506 _ _ a| Disponible para usuarios de ECOSUR con su clave de acceso
520 1 _ a| •The induction of defences in response to herbivory is a key mechanism of plant resistance. While a number of studies have investigated the time course and magnitude of plant induction in response to a single event of herbivory, few have looked at the effects of recurrent herbivory. Furthermore, studies measuring the effects of the total amount and recurrence of herbivory on both direct and indirect plant defences are lacking. To address this gap, here we asked whether insect leaf herbivory induced changes in the amount and concentration of extrafloral nectar (an indirect defence) and concentration of leaf phenolic compounds (a direct defence) in wild cotton(Gossypium hirsutum). •We conducted a greenhouse experiment where we tested single event or recurrent herbivory effects on defence induction by applying mechanical leaf damage and caterpillar (Spodoptera frugiperda) regurgitant. •Single events of 25% and 50% leaf damage did not significantly influence extrafloral nectar production or concentration. Extrafloral nectar traits did, however, increase significantly relative to controls when plants were exposed to recurrent herbivory (two episodes of 25% damage). In contrast, phenolic compounds increased significantly inresponse to single events of leaf damage but not to recurrent damage. In addition, we found. that local induction of extrafloral nectar production was stronger than systemic induction, whereas the reverse pattern was observed for phenolics. •Together, these results reveal seemingly inverse patterns of induction of direct andindirect defences in response to herbivory in wild cotton.
533 _ _ a| Reproducción electrónica en formato PDF
538 _ _ a| Adobe Acrobat profesional 6.0 o superior
650 _ 4 a| Gossypiun hirsutum
650 _ 4 a| Plantas de néctar
650 _ 4 a| Compuestos fenólicos
650 _ 4 a| Spodoptera frugiperda
650 _ 4 a| Herbívoros
650 _ 4 a| Resistencia de las plantas a enfermedades y plagas
650 _ 4 a| Análisis químico
700 1 _ a| Abdala Roberts, Luis
700 1 _ a| Reyes Hernández, Martha
e| coaut.
700 1 _ a| Quijano Medina, Teresa
e| coaut.
700 1 _ a| Moreira, Xoaquín
e| coaut.
700 1 _ a| Francisco, Marta
e| coaut.
700 1 _ a| Angulo, Diego F.
e| coaut.
700 1 _ a| Parra Tabla, Víctor
c| Doctor
e| coaut.
700 1 _ a| Virgen Sánchez, Armando
e| coaut.
700 1 _ a| Rojas, Julio C.
e| coaut.
773 0 _
t| Plant Biology
g| Vol. 21, no. 6 (November 2019), p. 1063-1071
x| 1438-8677
902 _ _ a| BG / MM
904 _ _ a| Noviembre 2019
905 _ _ a| Artecosur
905 _ _ a| Biblioelectrónica
LNG eng
Cerrar
Effects of amount and recurrence of leaf herbivory on the induction of direct and indirect defences in wild cotton
Abdala Roberts, Luis (autor)
Reyes Hernández, Martha (autor)
Quijano Medina, Teresa (autor)
Moreira, Xoaquín (autor)
Francisco, Marta (autor)
Angulo, Diego F. (autor)
Parra Tabla, Víctor (autor)
Virgen Sánchez, Armando (autor)
Rojas, Julio C. (autor)
Nota: Disponible para usuarios de ECOSUR con su clave de acceso
Contenido en: Plant Biology. Vol. 21, no. 6 (November 2019), p. 1063-1071. ISSN: 1438-8677
No. de sistema: 59657
Tipo: Artículo
PDF


Inglés

"•The induction of defences in response to herbivory is a key mechanism of plant resistance. While a number of studies have investigated the time course and magnitude of plant induction in response to a single event of herbivory, few have looked at the effects of recurrent herbivory. Furthermore, studies measuring the effects of the total amount and recurrence of herbivory on both direct and indirect plant defences are lacking. To address this gap, here we asked whether insect leaf herbivory induced changes in the amount and concentration of extrafloral nectar (an indirect defence) and concentration of leaf phenolic compounds (a direct defence) in wild cotton(Gossypium hirsutum). •We conducted a greenhouse experiment where we tested single event or recurrent herbivory effects on defence induction by applying mechanical leaf damage and caterpillar (Spodoptera frugiperda) regurgitant. •Single events of 25% and 50% leaf damage did not significantly influence extrafloral nectar production or concentration. Extrafloral nectar traits did, however, increase significantly relative to controls when plants were exposed to recurrent herbivory (two episodes of 25% damage). In contrast, phenolic compounds increased significantly inresponse to single events of leaf damage but not to recurrent damage. In addition, we found. that local induction of extrafloral nectar production was stronger than systemic induction, whereas the reverse pattern was observed for phenolics. •Together, these results reveal seemingly inverse patterns of induction of direct andindirect defences in response to herbivory in wild cotton."


  • Adobe Acrobat profesional 6.0 o superior