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Soil salinization disrupts plant–plant signaling effects on extra-floral nectar induction in wild cotton
Auteur(s)
Yeyson Briones-May
Teresa Quijano-Medina
Biiniza Pérez-Niño
Luis Abdala-Roberts
Date de parution
2023
In
Oecologia
Vol.
202
No
2
De la page
313
A la page
323
Résumé
Plant–plant interactions via volatile organic compounds (VOCs) have received much attention, but how abiotic stresses affect these interactions is poorly understood. We tested the effect of VOCs exposure from damaged conspecifics on the production of extra-floral nectar (EFN) in wild cotton plants (Gossypium hirsutum), a coastal species in northern Yucatan (Mexico), and whether soil salinization affected these responses. We placed plants in mesh cages, and within each cage assigned plants as emitters or receivers. We exposed emitters to either ambient or augmented soil salinity to simulate a salinity shock, and within each group subjected half of the emitters to no damage or artificial leaf damage with caterpillar regurgitant. Damage increased the emission of sesquiterpenes and aromatic compounds under ambient but not under augmented salinity. Cor- respondingly, exposure to VOCs from damaged emitters had effect on receiver EFN induction, but this effect was contingent on salinization. Receivers produced more EFN in response to damage after being exposed to VOCs from damaged emitters when the latter were grown under ambient salinity, but not when they were subjected to salinization. These results suggest complex effects of abiotic factors on VOC-mediated plant interactions.
Lié au projet
https://data.snf.ch/grants/grant/185319
Identifiants
Type de publication
research article
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