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Phytochrome A in Plants
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Phytochrome A in Plants

A special issue of International Journal of Molecular Sciences (ISSN 1422-0067). This special issue belongs to the section "Molecular Plant Sciences".

Deadline for manuscript submissions: closed (30 November 2023) | Viewed by 5262

Special Issue Editor

Dr. Vitaly Sineshchekov

E-Mail Website
Guest Editor
Biology Department of the M. V. Lomonosov Moscow State University, 119899 Moscow, Russia
Interests: photobiophysics; photobiochemistry; photobiology; light absoption; fluorescence; energy migration; photoreactons; photoreceptors; phytochromes; (bacterio) rhodopsins; photosynthetic pigments

Special Issue Information

Dear Colleagues,

The perception of and adaptation to environmental light conditions with the participation of the photoreceptor phytochrome — reversibly photoisomerizing biliprotein — remains one of the central problems in contemporary plant biology. In the last few decades, a system of phytochromes was discovered with the main phytochromes A and B (phyA and phyB), and the process of light stimulus acquisition, processing and realization was described in detail. phyA was shown to stand apart from phyB and minor phytochromes by its phenomenological properties and versatile functions; however, the molecular nature of its uniqueness is not yet fully understood. This Special Issue aims to collect recent advances in this area and present them along the following thematic lines:

  • Physicochemical characterization of phyA—molecular structure, chromophore-apoprotein interactions, heterogeneity, photoreactions and photocycle and bacterial phytochromes as a model for phyA;
  • phyA biosynthesis, post-translational modification and differentiation into distinct molecular types;
  • Light signal transduction from phyA, interactions with partner proteins in the cytoplasm and in the nucleus;
  • Realization of the light signal from phyA, regulation of morphogenesis, photosynthesis and photoperiodism, distinct modes of photoresponses, effects in the cytoplasm; functional interactions of phyA with the other plant photoreceptors and the hormonal system;
  • The role of phyA in the evolution of higher plants and ecology;
  • phyA in plant selection, artificial light agriculture, and design of fluorescent probes for medicine.

Works on phyA which are not covered by the above topics are certainly welcome.

Dr. Vitaly Sineshchekov
Guest Editor

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. International Journal of Molecular Sciences is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. There is an Article Processing Charge (APC) for publication in this open access journal. For details about the APC please see here. 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

  • phytochrome A
  • molecular structure and photocycle
  • biosynthesis
  • posttranslational modification
  • heterogeneity signal transduction
  • photoresponses
  • plant growth and development
  • photosynthesis
  • interaction with hormonal system

Published Papers (2 papers)

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Review

29 pages, 5802 KiB  
Review
Two Distinct Molecular Types of Phytochrome A in Plants: Evidence of Existence and Implications for Functioning
by Vitaly A. Sineshchekov
Int. J. Mol. Sci. 2023, 24(9), 8139; https://doi.org/10.3390/ijms24098139 - 02 May 2023
Cited by 2 | Viewed by 1851
Abstract
Phytochrome (phy) system in plants comprising a small number of phytochromes with phyA and phyB as major ones is responsible for acquiring light information in the red—far-red region of the solar spectrum. It provides optimal strategy for plant development under changing light conditions [...] Read more.
Phytochrome (phy) system in plants comprising a small number of phytochromes with phyA and phyB as major ones is responsible for acquiring light information in the red—far-red region of the solar spectrum. It provides optimal strategy for plant development under changing light conditions throughout all its life cycle beginning from seed germination and seedling establishment to fruiting and plant senescence. The phyA was shown to participate in the regulation of this cycle which is especially evident at its early stages. It mediates three modes of reactions—the very low and low fluence responses (VLFR and LFR) and the high irradiance responses (HIR). The phyA is the sole light receptor in the far-red spectral region responsible for plant’s survival under a dense plant canopy where light is enriched with the far-red component. Its appearance is believed to be one of the main factors of plants′ successful evolution. So far, it is widely accepted that one molecular phyA species is responsible for its complex functional manifestations. In this review, the evidence of the existence of two distinct phyA types—major, light-labile and soluble phyA′ and minor, relatively light-stable and amphiphilic phyA″—is presented as what may account for the diverse modes of phyA action. Full article
(This article belongs to the Special Issue Phytochrome A in Plants)
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18 pages, 2922 KiB  
Review
Regulation of Plant Photoresponses by Protein Kinase Activity of Phytochrome A
by Da-Min Choi, Seong-Hyeon Kim, Yun-Jeong Han and Jeong-Il Kim
Int. J. Mol. Sci. 2023, 24(3), 2110; https://doi.org/10.3390/ijms24032110 - 20 Jan 2023
Cited by 10 | Viewed by 2878
Abstract
Extensive research has been conducted for decades to elucidate the molecular and regulatory mechanisms for phytochrome-mediated light signaling in plants. As a result, tens of downstream signaling components that physically interact with phytochromes are identified, among which negative transcription factors for photomorphogenesis, PHYTOCHROME-INTERACTING [...] Read more.
Extensive research has been conducted for decades to elucidate the molecular and regulatory mechanisms for phytochrome-mediated light signaling in plants. As a result, tens of downstream signaling components that physically interact with phytochromes are identified, among which negative transcription factors for photomorphogenesis, PHYTOCHROME-INTERACTING FACTORs (PIFs), are well known to be regulated by phytochromes. In addition, phytochromes are also shown to inactivate an important E3 ligase complex consisting of CONSTITUTIVELY PHOTOMORPHOGENIC 1 (COP1) and SUPPRESSORs OF phyA-105 (SPAs). This inactivation induces the accumulation of positive transcription factors for plant photomorphogenesis, such as ELONGATED HYPOCOTYL 5 (HY5). Although many downstream components of phytochrome signaling have been studied thus far, it is not fully elucidated which intrinsic activity of phytochromes is necessary for the regulation of these components. It should be noted that phytochromes are autophosphorylating protein kinases. Recently, the protein kinase activity of phytochrome A (phyA) has shown to be important for its function in plant light signaling using Avena sativa phyA mutants with reduced or increased kinase activity. In this review, we highlight the function of phyA as a protein kinase to explain the regulation of plant photoresponses by phyA. Full article
(This article belongs to the Special Issue Phytochrome A in Plants)
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