The molecular mechanisms underlying hydrogen peroxide regulating free-living conchocelis maturation of Pyropia haitanensis
- 1Fisheries College, Jimei University, Xiamen, China
- 2State Key Laboratory of Mariculture Breeding, Fisheries College, Jimei University, Ningde, China
- 3Key Laboratory of Healthy Mariculture for the East China Sea, Ministry of Agriculture, Xiamen, China
Abstract
The transition from conchocelis to conchosporangial branches is not only a key stage in the life cycle of Pyropia/Porphyra but also directly affects the yield and quality of economically important species such as Pyropia haitanensis. However, the molecular mechanisms underlying the maturation of P. haitanensis filaments remain poorly understood. Hydrogen peroxide (H2O2), as an important signaling molecule, plays a significant role in algae development. This study demonstrated that treatment with the H2O2 scavenger DMTU (500 μmol/L) significantly reduced H2O2 and O2- levels within the algae, affecting the activity of antioxidant enzymes and the content of antioxidant substances. This disrupted the ROS balance, inhibited key pathways such as photosynthesis and nitrogen metabolism, and triggered dysregulation in downstream metabolite synthesis. Consequently, the levels of most amino acids and their derivatives, nucleotides, and lipids were decreased. This diverted energy and resources from the “maturation program” towards a “stress-response program,” thereby delaying conchocelis maturation. Notably, this inhibitory effect was reversible following DMTU removal. When unfavorable conditions necessitate delayed maturation induction, intervention with DMTU could be applied to effectively reduce the risk of conchospore “abortion”. In summary, H2O2 is a critical signaling molecule regulating the maturation of P. haitanensis conchocelis. This study provides a theoretical basis for elucidating the molecular regulatory network governing conchocelis maturation in Pyropia/Porphyra and achieving precise regulation of synchronized maturation.
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BibTeX
@article{he2026molecular,
title = {{The molecular mechanisms underlying hydrogen peroxide regulating free-living conchocelis maturation of Pyropia haitanensis}},
author = {Rong He and Wenfei Xian and Yan Xu and Dehua Ji and Chaotian Xie and Wenlei Wang},
journal = {Frontiers in Plant Science},
year = {2026},
month = oct,
doi = {10.3389/fpls.2026.1979927},
url = {https://doi.org/10.3389/fpls.2026.1979927},
note = {CC BY 4.0},
}
RIS
TY - JOUR
TI - The molecular mechanisms underlying hydrogen peroxide regulating free-living conchocelis maturation of Pyropia haitanensis
AU - Rong He
AU - Wenfei Xian
AU - Yan Xu
AU - Dehua Ji
AU - Chaotian Xie
AU - Wenlei Wang
PY - 2026
DA - 2026/10/12
JO - Frontiers in Plant Science
DO - 10.3389/fpls.2026.1979927
UR - https://doi.org/10.3389/fpls.2026.1979927
AB - The transition from conchocelis to conchosporangial branches is not only a key stage in the life cycle of Pyropia/Porphyra but also directly affects the yield and quality of economically important species such as Pyropia haitanensis. However, the molecular mechanisms underlying the maturation of P. haitanensis filaments remain poorly understood. Hydrogen peroxide (H2O2), as an important signaling molecule, plays a significant role in algae development. This study demonstrated that treatment with the H2O2 scavenger DMTU (500 μmol/L) significantly reduced H2O2 and O2- levels within the algae, affecting the activity of antioxidant enzymes and the content of antioxidant substances. This disrupted the ROS balance, inhibited key pathways such as photosynthesis and nitrogen metabolism, and triggered dysregulation in downstream metabolite synthesis. Consequently, the levels of most amino acids and their derivatives, nucleotides, and lipids were decreased. This diverted energy and resources from the “maturation program” towards a “stress-response program,” thereby delaying conchocelis maturation. Notably, this inhibitory effect was reversible following DMTU removal. When unfavorable conditions necessitate delayed maturation induction, intervention with DMTU could be applied to effectively reduce the risk of conchospore “abortion”. In summary, H2O2 is a critical signaling molecule regulating the maturation of P. haitanensis conchocelis. This study provides a theoretical basis for elucidating the molecular regulatory network governing conchocelis maturation in Pyropia/Porphyra and achieving precise regulation of synchronized maturation.
SN - 1664-462X
ER -