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Plants
Special Issues
Algal Morphogenesis and Response to Abiotic Stresses
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Algal Morphogenesis and Response to Abiotic Stresses

A special issue of Plants (ISSN 2223-7747). This special issue belongs to the section "Plant Response to Abiotic Stress and Climate Change".

Deadline for manuscript submissions: 31 August 2026 | Viewed by 2335

Special Issue Editor

Prof. Dr. Koji Mikami

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Guest Editor
Department of Integrative Studies of Plant and Animal Production, School of Food Industrial Sciences, Miyagi University, 2-2-1 Hatatate, Taihaku-ku, Sendai 982-0215, Japan
Interests: seaweed; bryophyte; abiotic stress; development; morphogenesis; gene expression; phosphoinositide signalling; fatty acid metabolism; stress tolerance; stress memory; molecular breeding
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Due to daily and monthly changes in living conditions, macroalgae are thought to acquire tolerance to these environmental changes to maintain growth and development normally. Understanding the regulatory mechanisms of stress response and development is quite important to breed novel strains of macroalgae with excellent characteristics against exposure to environmental stress under global warming conditions. To date, knowledge about life cycle and morphology of macroalgae have been extensively accumulated mainly for supporting their phylogenetic classification. However, physiological and molecular biological mechanisms of regulating response to environmental stress, development, and morphogenesis mostly remain to be elucidated, although environmental stress-inducible genes and some candidates of signaling factors have been identified.

This Special Issue highlights the latest findings related to the regulation and networks of growth, morphogenesis, and stress response at physiological, biochemical, and molecular levels. Thus, we intend to collect research articles, short communications, and review articles related to the above topics pertaining to freshwater and marine macroalgae.

Prof. Dr. Koji Mikami
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 250 words) can be sent to the Editorial Office for assessment.

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

  • growth morphogenesis
  • polarity stress response
  • global warming
  • gene expression
  • signal transduction
  • transcriptomics
  • genomics
  • proteomics
  • metabolomics
  • stress tolerance
  • acclimation
  • regulatory network

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Published Papers (2 papers)

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Research

12 pages, 1441 KB  
Article
Influence of Light Quality on the Initial Development in Edible Brown Alga Cladosiphon okamuranus
by Yoichi Sato, Eri Inomata, Hikari Nagoe, Yuuichiro Numata and Atsuko Tanaka
Plants 2026, 15(6), 895; https://doi.org/10.3390/plants15060895 - 13 Mar 2026
Viewed by 508
Abstract
The impact of light quality on pre-germling formation was studied in the edible macroalga Cladosiphon okamuranus, cultivated in subtropical Japan. While the conditions for germination remain unclear, successful cultivation typically occurs in deeper nursery sites where light quality might play a crucial [...] Read more.
The impact of light quality on pre-germling formation was studied in the edible macroalga Cladosiphon okamuranus, cultivated in subtropical Japan. While the conditions for germination remain unclear, successful cultivation typically occurs in deeper nursery sites where light quality might play a crucial role. Initially, we compared light wavelengths at various depths, revealing that blue light (400–500 nm) predominated at approximately 7.5 m, where aquaculture nets were used for germination. Two experiments were conducted using discoid thalli. In the first, thalli were grown under four light conditions (white, blue, red, and a combination of blue and red) in sterilized seawater or nutrient-enriched PESI medium. Blue light resulted in the highest pre-germling formation rates in sterilized seawater, and notable rates were observed in the PESI medium across all wavelengths except red. The second experiment involved culturing thalli in sterilized seawater under white, blue, and red light at varying intensities (25 or 100 µmol photons m−2 s−1). The consistent promotion of pre-germling formation was observed with blue light, whereas red light produced no effects. These findings highlight the importance of blue light for germination in C. okamuranus, which can aid in optimizing nursery site and incubation conditions. Full article
(This article belongs to the Special Issue Algal Morphogenesis and Response to Abiotic Stresses)
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10 pages, 1373 KB  
Communication
Phosphoinositide Signaling and Actin Polymerization Are Critical for Tip Growth in the Marine Red Alga Pyropia yezoensis
by Ryunosuke Irie and Koji Mikami
Plants 2025, 14(14), 2194; https://doi.org/10.3390/plants14142194 - 15 Jul 2025
Viewed by 1008
Abstract
In the marine red alga Pyropia yezoensis, filamentous phases of the life cycle, e.g., the conchocelis (sporophyte) and conchosporangium (conchosporophyte), proliferate by tip growth. In this study, we investigated the possible involvement of phosphoinositide turnover and actin polymerization in the spontaneous initiation [...] Read more.
In the marine red alga Pyropia yezoensis, filamentous phases of the life cycle, e.g., the conchocelis (sporophyte) and conchosporangium (conchosporophyte), proliferate by tip growth. In this study, we investigated the possible involvement of phosphoinositide turnover and actin polymerization in the spontaneous initiation and tip growth of new branches in isolated single-celled conchocelis cells using pharmacological treatments. Treatment with LY294002 and U73122, specific inhibitors of phosphoinositide-phosphate 3-kinase and phospholipase C, respectively, reduced side-branch formation and inhibited the elongation of branches. In addition, two inhibitors of the actin cytoskeleton, cytochalasin B (CCB) and latrunculin B (LAT-B), had similar effects on tip growth. However, CCB did not alter the branching rate of single-celled conchocelis, whereas LAT-B did. As CCB and LAT-B affect actin polymerization through different mechanisms, this result suggests differences in the contributions of actin polymerization to branch initiation versus tip growth. These findings demonstrate the critical and diverse functional roles played by phosphoinositide turnover and actin polymerization in the regulation of the initiation and maintenance of tip growth in the conchocelis phase of P. yezoensis. Full article
(This article belongs to the Special Issue Algal Morphogenesis and Response to Abiotic Stresses)
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