Ethylene regulation of sexual reproduction in the marine red alga Pyropia yezoensis (Rhodophyta)

Uji, Toshiki; Matsuda, Ryuya; Takechi, Katsuaki; Takano, Hiroyoshi; Mizuta, Hiroyuki; Takio, Susumu

doi:10.1007/s10811-016-0904-6

Cited by 25 publications

(41 citation statements)

References 39 publications

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“…Genomic data also support the presence of ethylene-mediated regulation in Porphyra, because the Porphyra genome contains genes encoding several proteins involved in ethylene biosynthesis (SI Appendix, Fig. S35B), and ethylene was detected and shown to induce stress responses in red algae (78).…”

Section: Significancementioning

confidence: 73%

Insights into the red algae and eukaryotic evolution from the genome of Porphyra umbilicalis (Bangiophyceae, Rhodophyta)

Brawley¹,

Blouin²,

Ficko-Blean³

et al. 2017

Proc. Natl. Acad. Sci. U.S.A.

239

222

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Porphyra umbilicalis (laver) belongs to an ancient group of red algae (Bangiophyceae), is harvested for human food, and thrives in the harsh conditions of the upper intertidal zone. Here we present the 87.7-Mbp haploid Porphyra genome (65.8% G + C content, 13,125 gene loci) and elucidate traits that inform our understanding of the biology of red algae as one of the few multicellular eukaryotic lineages. Novel features of the Porphyra genome shared by other red algae relate to the cytoskeleton, calcium signaling, the cell cycle, and stress-tolerance mechanisms including photoprotection. Cytoskeletal motor proteins in Porphyra are restricted to a small set of kinesins that appear to be the only universal cytoskeletal motors within the red algae. Dynein motors are absent, and most red algae, including Porphyra, lack myosin. This surprisingly minimal cytoskeleton offers a potential explanation for why red algal cells and multicellular structures are more limited in size than in most multicellular lineages. Additional discoveries further relating to the stress tolerance of bangiophytes include ancestral enzymes for sulfation of the hydrophilic galactan-rich cell wall, evidence for mannan synthesis that originated before the divergence of green and red algae, and a high capacity for nutrient uptake. Our analyses provide a comprehensive understanding of the red algae, which are both commercially important and have played a major role in the evolution of other algal groups through secondary endosymbioses.cytoskeleton | calcium-signaling | carbohydrate-active enzymes | stress tolerance | vitamin B 12T he red algae are one of the founding groups of photosynthetic eukaryotes (Archaeplastida) and among the few multicellular lineages within Eukarya. A red algal plastid, acquired through secondary endosymbiosis, supports carbon fixation, fatty acid synthesis, and other metabolic needs in many other algal groups in ways that are consequential. For example, diatoms and haptophytes have strong biogeochemical effects; apicomplexans cause human disease (e.g., malaria); and dinoflagellates include both coral symbionts and toxin-producing "red tides" (1). The evolutionary processes that produced the Archaeplastida and secondary algal lineages remain under investigation (2-5), but it is clear that both nuclear and plastid genes from the ancestral red algae have contributed dramatically to broader eukaryotic evolution and diversity. Consequently, the imprint of red algal metabolism on the Earth's climate system, aquatic foodwebs, and

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Section: Significancementioning

confidence: 73%

Insights into the red algae and eukaryotic evolution from the genome of Porphyra umbilicalis (Bangiophyceae, Rhodophyta)

Brawley¹,

Blouin²,

Ficko-Blean³

et al. 2017

Proc. Natl. Acad. Sci. U.S.A.

239

222

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Section: Discussionmentioning

confidence: 99%

“…In Pyropia yezoensis , the exogenous addition of the ethylene precursor 1‐aminocyclopropane‐1‐carboxylic acid (ACC) favors the formation of spermatia and zygospores (Uji et al. ). In addition, ethylene also reduces the time required for cystocarp and tetrasporangia development (Garcia‐Jimenez and Robaina ).…”

mentioning

confidence: 99%

“…Ethylene is especially noteworthy in the reproduction of red macroalgae because it regulates the development of cystocarps and tetrasporangial branches as well as spore release in both Pterocladiella capillacea and G. imbricata (Garcia-Jimenez and Robaina 2012). In Pyropia yezoensis, the exogenous addition of the ethylene precursor 1aminocyclopropane-1-carboxylic acid (ACC) favors the formation of spermatia and zygospores (Uji et al 2016). In addition, ethylene also reduces the time required for cystocarp and tetrasporangia development (Garcia-Jimenez and Robaina 2017).…”

mentioning

confidence: 99%

“…Evidence obtained in vitro for the role of plant growth regulators (PGRs) has shown how ethylene and PAs affect carposporogenesis in red macroalgae such as Pyropia yezoensis(Uji et al 2016), Gracilaria cornea (Guzm an-Uri ostegui et al 2002), Grateloupia imbricata(Sacramento et al 2004(Sacramento et al , 2007, and Pterocladiella capillacea (Garcia-Jimenez andRobaina 2012. It has become evident that of genes that encode proteins related to the synthesis (Spd synthase) and degradation (amine oxidase) of polyamines and S-adenosyl methionine synthase (SAMS), along with expression of the candidate gene (ODC) at 1 and 7 d after a 15min ethylene treatment (A, B).…”

mentioning

confidence: 99%

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Analysis of ethylene‐induced gene regulation during carposporogenesis in the red seaweed Grateloupia imbricata (Rhodophyta)

García‐Jiménez

Montero-Fernández

Robaina

2018

Journal of Phycology

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Ethylene favors carposporogenesis in the red seaweed Grateloupia imbricata. Analyses of cystocarp development in vitro in thalli treated with ethylene suggest an interconnection between polyamine and ethylene biosynthesis pathways. Yet, little is known about molecular mechanisms underlying carposporogenesis. Here, we used droplet digital PCR to analyze genes encoding enzymes related to polyamine (Spermidine [Spd] synthase) and ethylene (ACC synthase) synthesis; a pivotal compound of both pathways (S-adenosyl methionine synthase, SAMS); the gene that encodes amine oxidase, which is involved in polyamine degradation, and a candidate gene involved in seaweed reproduction (ornithine decarboxylase, ODC). In addition, we analyzed genes encoding proteins related to stress and reactive oxygen species, ascorbate peroxidase (APX), cytochrome P450 and WD 40. We characterized gene expression in fertilized and fertile thalli from G. imbricata that were exposed to ethylene for 15 min at two time points after treatment (1 and 7 d). The differential gene expression of SAMS, Spd synthase, ACC synthase, and cytochrome P450 was related to disclosure and development of cystocarps in fertilized thalli that transitioned from having no visible cystocarps at 1 d to developing cystocarps at 7 d. Likewise, cytochrome P450 was associated with cystocarp disclosure and maturation. In addition, amine oxidase and APX were involved in fine-tuning polyamine and reactive oxygen species during carposporogenesis, respectively, whereas WD 40 did so in relation to ethylene signaling. Expression of the candidate gene ODC was increased when cystocarps were not visible (fertilized thalli, 1d), as previously described. This analysis suggests developmental stage-specific roles for these genes during carposporogenesis.

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Benefits of Algal Extracts in Sustainable Agriculture

Pan

Jeevanandam

Danquah

2019

Grand Challenges in Biology and Biotechnology

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Ethylene regulation of sexual reproduction in the marine red alga Pyropia yezoensis (Rhodophyta)

Cited by 25 publications

References 39 publications

Insights into the red algae and eukaryotic evolution from the genome of Porphyra umbilicalis (Bangiophyceae, Rhodophyta)

Insights into the red algae and eukaryotic evolution from the genome of Porphyra umbilicalis (Bangiophyceae, Rhodophyta)

Analysis of ethylene‐induced gene regulation during carposporogenesis in the red seaweed Grateloupia imbricata (Rhodophyta)

Benefits of Algal Extracts in Sustainable Agriculture

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