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https://hdl.handle.net/2440/139269
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Type: | Journal article |
Title: | Evidence of Bi-Directional Volatile-Mediated Communication between Drought-Stressed and Well-Watered Grapevines (Vitis vinifera L.) |
Author: | Midzi, J. Jeffery, D.W. Baumann, U. Capone, D.L. Rogiers, S.Y. Pagay, V. |
Citation: | Agronomy, 2023; 13(7):1747-1747 |
Publisher: | MDPI AG |
Issue Date: | 2023 |
ISSN: | 2073-4395 |
Statement of Responsibility: | Joanah Midzi, David W. Jeffery, Ute Baumann, Dimitra L. Capone, Suzy Y. Rogiers, and Vinay Pagay |
Abstract: | The volatile-mediated interplay between stressed and non-stressed plants has been described in many studies involving both biotic and abiotic stresses as a one-way channel. However, very little is known about the molecular basis and mechanisms by which volatile organic compounds (VOCs) mediate plant communication between drought-stressed ‘emitter’ plants and non-stressed ‘receiver’ neighbours for the defence against impending stress challenges. Aiming to address this in grapevine, this study investigated the effect of two-way VOC exchange between stressed and non-stressed Vitis vinifera L. cv. Shiraz during drought and recovery using four treatments: isolated well-watered (WW) vines, isolated drought-stressed (DS) vines, and co-located DS ‘emitter’ and WW ‘receiver’ vines in a growth room. The results obtained from solid-phase microextraction (SPME) gas chromatography mass spectrometry (GC-MS) analysis showed a synchronised decline in α-pinene concentration in the co-located treatment vines and higher isoprene levels in the DS emitters compared to the isolated DS vines. Targeted gene expression analysis further identified the over-expression of a key gene, allene oxide synthase (AOS), in the jasmonic acid (JA) biosynthesis pathway during peak drought in the DS emitter. Transcript expression of chorismate synthase (CHORS) and α-pinene synthase (VvPNaPin1) showed similar trends in the DS emitter. The results suggest that isoprene and α-pinene may be interplant signalling molecules used by grapevine during drought. To the best of our knowledge, this is the first report of a bi-directional interaction in grapevine between the emitters and receivers under drought stress mediated by the JA and terpenoid biosynthesis pathways. |
Keywords: | -pinene; isoprene; plant–plant interactions; VOC priming; VOCs; abiotic stress |
Rights: | © 2023 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
DOI: | 10.3390/agronomy13071747 |
Grant ID: | http://purl.org/au-research/grants/arc/IC170100008 |
Published version: | http://dx.doi.org/10.3390/agronomy13071747 |
Appears in Collections: | Agriculture, Food and Wine publications |
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