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Stomatal closure prevents xylem transport of green leaf volatiles and impairs their systemic function in plants
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  • Feizollah A. Maleki,
  • Irmgard Seidl-Adams,
  • Azadeh Fahimi,
  • Gary Felton,
  • James Tumlinson
Feizollah A. Maleki
The Pennsylvania State University Center for Chemical Ecology

Corresponding Author:[email protected]

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Irmgard Seidl-Adams
The Pennsylvania State University Center for Chemical Ecology
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Azadeh Fahimi
no affiliation
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Gary Felton
The Pennsylvania State University Center for Chemical Ecology
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James Tumlinson
The Pennsylvania State University Center for Chemical Ecology
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Abstract

Plants perceive environmental stresses as whole organisms via distant signals conveying danger messages through their vasculature. In parallel to vascular transport, airborne plant volatile compounds, including green leaf volatiles (GLVs), can bypass the lack of vascular connection. However, some small volatile compounds move through the vasculature; such vascular transport is little known about GLVs. Here we illustrate GLV alcohols as solutes move within xylem vessels in Zea mays. We describe GLV alcohols, including Z-3-hexenol and its isomer E-3-hexenol, which is not synthesized in maize, is mobilized through the transpiration stream via xylem vessels. Since transpiration is mediated by stomatal aperture, closing stomata by two independent methods diminishes the transport of GLV alcohol and its isomer. In addition, lower transport of GLV alcohols impairs their function in inducing terpenoid biosynthesis suggesting xylem transport of GLV alcohols plays a significant role in their systemic function. Our study not only shows that GLV alcohols can be transported in the xylem but points to stomatal regulation as a mechanism that climatic factors such as drought, heat, flooding, and high CO 2 levels affect systemic signaling functions of GLVs.
31 Jan 2023Submitted to Plant, Cell & Environment
31 Jan 2023Submission Checks Completed
31 Jan 2023Assigned to Editor
05 Feb 2023Review(s) Completed, Editorial Evaluation Pending
06 Feb 2023Reviewer(s) Assigned
01 Mar 2023Editorial Decision: Revise Minor
01 Jun 20231st Revision Received
12 Jun 2023Submission Checks Completed
12 Jun 2023Assigned to Editor
18 Jun 2023Review(s) Completed, Editorial Evaluation Pending
26 Jun 2023Reviewer(s) Assigned
31 Jul 2023Editorial Decision: Revise Minor
28 Sep 20232nd Revision Received
30 Sep 2023Submission Checks Completed
30 Sep 2023Assigned to Editor
30 Sep 2023Review(s) Completed, Editorial Evaluation Pending
03 Oct 2023Editorial Decision: Accept