Mechanisms and Regulation of Hormone Transport in Plants

A special issue of Plants (ISSN 2223-7747). This special issue belongs to the section "Plant Molecular Biology".

Deadline for manuscript submissions: closed (31 October 2023) | Viewed by 1806

Special Issue Editor

Department of Biology, University of Fribourg, Fribourg, Switzerland
Interests: auxin transport; P-Glycoprotein; ABC transporter; plant biology

Special Issue Information

Dear Colleagues,

Plant hormones, or phytohormones, are essential chemical messengers that regulate a wide range of physiological and developmental processes in plants as well as in non-plant organisms. The members of different hormone classes have diverse and overlapping roles in growth, development and response to environmental cues, but a common feature is that their local or long-distance transport is crucial to ensure that the hormones reach their target tissues and exert their local effects.

Recent research has identified a large number of plant hormone transporters from different classes (such as ATP-binding cassette (ABC), MATE, PIN (PIN) and NITRATE TRANSPORTER 1/PEPTIDE TRANSPORTER FAMILY (NPF)), each with specific functions and expression patterns. In addition, the scientific community has invested considerable energy into unravelling their individual and overlapping roles, interactions and modes of regulation at the transport and expression levels.

In this context, we invite contributions to this Special Issue from all disciplines that aid in understanding the fascinating process of phytohormone transport. This includes the individual roles of phytohormone transporters, their transport mechanisms, their regulation, as well as their interplay. We particularly welcome work from crop plants and beyond the classical model plants, with a special focus on plant–microbe interactions. As such, this issue aims to advance our understanding of phytohormone transport, which may provide the basis for improving crop yields, developing new plant biotechnologies and protecting the environment.

Markus Geisler
Guest Editor

Manuscript Submission Information

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Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • phytohormone
  • hormone transport
  • auxin
  • abscisic acid
  • cytokinins
  • brassinosteroids
  • gibberelins
  • ABC transporter
  • PINs
  • NPF
  • MATE

Published Papers (1 paper)

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Research

26 pages, 6086 KiB  
Article
Chloroplast Auxin Efflux Mediated by ABCB28 and ABCB29 Fine-Tunes Salt and Drought Stress Responses in Arabidopsis
by Prashanth Tamizhselvan, Sharmila Madhavan, Christian Constan-Aguilar, Eman Ryad Elrefaay, Jie Liu, Aleš Pěnčík, Ondřej Novák, Albert Cairó, Mónika Hrtyan, Markus Geisler and Vanesa Beatriz Tognetti
Plants 2024, 13(1), 7; https://doi.org/10.3390/plants13010007 - 19 Dec 2023
Cited by 2 | Viewed by 1303
Abstract
Photosynthesis is among the first processes negatively affected by environmental cues and its performance directly determines plant cell fitness and ultimately crop yield. Primarily sites of photosynthesis, chloroplasts are unique sites also for the biosynthesis of precursors of the growth regulator auxin and [...] Read more.
Photosynthesis is among the first processes negatively affected by environmental cues and its performance directly determines plant cell fitness and ultimately crop yield. Primarily sites of photosynthesis, chloroplasts are unique sites also for the biosynthesis of precursors of the growth regulator auxin and for sensing environmental stress, but their role in intracellular auxin homeostasis, vital for plant growth and survival in changing environments, remains poorly understood. Here, we identified two ATP-binding cassette (ABC) subfamily B transporters, ABCB28 and ABCB29, which export auxin across the chloroplast envelope to the cytosol in a concerted action in vivo. Moreover, we provide evidence for an auxin biosynthesis pathway in Arabidopsis thaliana chloroplasts. The overexpression of ABCB28 and ABCB29 influenced stomatal regulation and resulted in significantly improved water use efficiency and survival rates during salt and drought stresses. Our results suggest that chloroplast auxin production and transport contribute to stomata regulation for conserving water upon salt stress. ABCB28 and ABCB29 integrate photosynthesis and auxin signals and as such hold great potential to improve the adaptation potential of crops to environmental cues. Full article
(This article belongs to the Special Issue Mechanisms and Regulation of Hormone Transport in Plants)
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