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Plants
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Plant Membrane Transporters
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Plant Membrane Transporters

A special issue of Plants (ISSN 2223-7747). This special issue belongs to the section "Plant Physiology and Metabolism".

Deadline for manuscript submissions: closed (31 January 2020) | Viewed by 8113

Special Issue Editors

Dr. Takayuki Sasaki

E-Mail Website
Guest Editor
Institute of Plant Science and Resources, Okayama University, Okayama, Japan
Interests: acidic soil; aluminum stress; ALMT-family protein; anion transport; fruit; guard cell; malate transporter
Dr. Izumi C. Mori

E-Mail Website
Guest Editor
Institute of Plant Science and Resources, Okayama University, Okayama, Japan
Interests: environment; stress response; phytohormones; signal transduction; stomata; patch clamp
Prof. Dr. Maki Katsuhara

E-Mail Website
Guest Editor
Institute of Plant Science and Resources, Okayama University, Okayama, Japan
Interests: ion transport; osmotic stress; plant aquaporins; root water permeability; salt stress; water transport

Special Issue Information

Dear Colleagues,

A plasma membrane surrounding a plant cell to isolate it from external environmental influences plays a critical role in receiving environmental signals that are often mediated via ion and solute fluxes across the membrane. Transport of various ions and solutes across the plasma and inner membranes is fundamentally important for plant cell metabolism and actions. In fact, membrane transporters are necessary for the translocation of ions and solutes in plants. Ion channels, pumps, and carriers are designated as “transporters” in this issue. Membranes of plant-specific organelles such as tonoplasts and chloroplast membranes also include many transporters to maintain their physiological functions. In past years, studies of bacterial and mammalian membrane transporters have predominated over those of plant transporters. Nevertheless, much knowledge related to plant transporters has been accumulated recently; novel transporters in response to environmental stresses have been discovered. To advance comprehensive knowledge about plant membrane transporters, this Special Issue of Plants extends an invitation to share new findings related to physiological functions and molecular mechanisms of membrane transporters broadly among plants, from algae to embryophytes. Reports of studies that have leveraged electrophysiology as well as those of molecular biology, biochemistry, cytology, ionomics, and genetics are all welcome.

Dr. Takayuki Sasaki
Dr. Izumi C. Mori
Prof. Dr. Maki Katsuhara
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Plants is an international peer-reviewed open access semimonthly journal published by MDPI.

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

  • plant membranes
  • ion and solute transport
  • transport function
  • stress response
  • electrophysiology

Published Papers (2 papers)

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Research

16 pages, 1619 KiB  
Article
Role of Proton Motive Force in Photoinduction of Cytoplasmic Streaming in Vallisneria Mesophyll Cells
by Akiko Harada, Yoshiji Okazaki, Toshinori Kinoshita, Reiko Nagai and Shingo Takagi
Plants 2020, 9(3), 376; https://doi.org/10.3390/plants9030376 - 18 Mar 2020
Cited by 4 | Viewed by 3356
Abstract
In mesophyll cells of the aquatic monocot Vallisneria, red light induces rotational cytoplasmic streaming, which is regulated by the cytoplasmic concentration of Ca2+. Our previous investigations revealed that red light induces Ca2+ efflux across the plasma membrane (PM), and [...] Read more.
In mesophyll cells of the aquatic monocot Vallisneria, red light induces rotational cytoplasmic streaming, which is regulated by the cytoplasmic concentration of Ca2+. Our previous investigations revealed that red light induces Ca2+ efflux across the plasma membrane (PM), and that both the red light-induced cytoplasmic streaming and the Ca2+ efflux are sensitive to vanadate, an inhibitor of P-type ATPases. In this study, pharmacological experiments suggested the involvement of PM H+-ATPase, one of the P-type ATPases, in the photoinduction of cytoplasmic streaming. We hypothesized that red light would activate PM H+-ATPase to generate a large H+ motive force (PMF) in a photosynthesis-dependent manner. We demonstrated that indeed, photosynthesis increased the PMF and induced phosphorylation of the penultimate residue, threonine, of PM H+-ATPase, which is a major activation mechanism of H+-ATPase. The results suggested that a large PMF generated by PM H+-ATPase energizes the Ca2+ efflux across the PM. As expected, we detected a putative Ca2+/H+ exchange activity in PM vesicles isolated from Vallisneria leaves. Full article
(This article belongs to the Special Issue Plant Membrane Transporters)
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12 pages, 2014 KiB  
Article
Expression and Ion Transport Activity of Rice OsHKT1;1 Variants
by Shahin Imran, Tomoaki Horie and Maki Katsuhara
Plants 2020, 9(1), 16; https://doi.org/10.3390/plants9010016 - 21 Dec 2019
Cited by 15 | Viewed by 3977
Abstract
OsHKT1;1 in rice, belongs to the high-affinity K+ Transporter family, has been found to be involved in salt tolerance. OsHKT1;1 in japonica rice (Nipponbare) produces mRNA variants, but their functions remain elusive. In salt tolerant rice, Pokkali, eight OsHKT1;1 variants (V1-V8) were [...] Read more.
OsHKT1;1 in rice, belongs to the high-affinity K+ Transporter family, has been found to be involved in salt tolerance. OsHKT1;1 in japonica rice (Nipponbare) produces mRNA variants, but their functions remain elusive. In salt tolerant rice, Pokkali, eight OsHKT1;1 variants (V1-V8) were identified in addition to the full-length OsHKT1;1 (FL) cDNA. Absolute quantification by qPCR revealed that accumulation of OsHKT1;1-FL mRNA is minor in contrast to that of OsHKT1;1-V1, -V2, -V4, and -V7 mRNAs, all of which are predominant in shoots, while only V1 and V7 mRNAs are predominant in roots. Two electrode voltage clamp (TEVC) experiments using Xenopus laevis oocytes revealed that oocytes-expressing OsHKT1;1-FL from Pokkali exhibited inward-rectified currents in the presence of 96 mM Na+ as reported previously. Further TEVC analyses indicated that six of eight OsHKT1;1 variants elicited currents in a Na+ or a K+ bath solution. OsHKT1;1-V6 exhibited a similar inward rectification to the FL protein. Contrastingly, however, the rests mediated bidirectional currents in both Na+ and K+ bath solutions. These data suggest possibilities that novel mechanisms regulating the transport activity of OsHKT1;1 might exist, and that OsHKT1;1 variants might also carry out distinct physiological roles either independently or in combination with OsHKT1;1-FL. Full article
(This article belongs to the Special Issue Plant Membrane Transporters)
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