An ancestral function of strigolactones as symbiotic rhizosphere signals

Kodama, Kyoichi; Rich, Mélanie K.; Yoda, Akiyoshi; Shimazaki, Shota; Xie, Xiaonan; Akiyama, Kazuo; Mizuno, Yohei; Komatsu, Aino; Luo, Yi; Suzuki, Hidemasa; Kameoka, Hiromu; Libourel, Cyril; Keller, Jean; Sakakibara, Keiko; Nishiyama, Tomoaki; Nakagawa, Tomomi; Mashiguchi, Kiyoshi; Uchida, Kenichi; Yoneyama, Kaori; Tanaka, Yoshikazu; Yamaguchi, Shinjiro; Shimamura, Masaki; Delaux, Pierre‐Marc; Nomura, T.; Kyozuka, Junko

doi:10.1038/s41467-022-31708-3

Cited by 63 publications

(32 citation statements)

References 72 publications

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“…It was surprising that phosphate did not affect germination of P. japonicum , due to discrepancies in previous findings: biosynthesis and release of SLs are induced in plants in phosphate-deplete conditions, which induces symbiosis with arbuscular mycorrhizal fungi and germination of seeds of neighboring obligate parasitic plants in the family Orobanchaceae. 27 We hypothesize that this discrepancy might indicate that P. japonicum deprives nitrate ions rather than phosphate. Our hypothesis is supported by the previous study showing that P. japonicum efficiently deprive nitrogen of host plants, particularly in nutrient-deplete conditions.…”

Section: Resultsmentioning

confidence: 95%

Strigol induces germination of the facultative parasitic plant Phtheirospermum japonicum in the absence of nitrate ions

Ogawa

Shirasu

2022

Plant Signaling & Behavior

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Root parasitic plants in the family Orobanchaceae, such as Striga and Orobanche spp., infest major crops worldwide, leading to a multibillion-dollar loss annually. Host-derived strigolactones (SLs), recognized by a group of α/β hydrolase receptors (KAI2d) in these parasites, are important determinants for germinating root parasitic plants near the roots of host plants. Phtheirospermum japonicum , a facultative hemiparasitic Orobanchaceae plant, can germinate and grow in the presence or absence of the host and can also exhibit root chemotropism to host-derived SLs that are perceived via KAI2d. However, the importance of SLs in P. japonicum germination remains unclear. In this study, we found that germination of P. japonicum was suppressed in the absence of nitrate ions and that germination of P. japonicum was promoted by exogenous strigol, an SL, under such conditions. We propose a model in which P. japonicum may select either independent living or parasitism in response to ambient nitrogen conditions and host presence.

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Section: Resultsmentioning

confidence: 95%

Strigol induces germination of the facultative parasitic plant Phtheirospermum japonicum in the absence of nitrate ions

Ogawa

Shirasu

2022

Plant Signaling & Behavior

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“…Strigolactone biosynthesis has been well established in land plants (Proust et al 2011, Delaux et al 2012, Waters et al; 2017, Kodama et al 2022). The streptophyte alga Nitella has been shown to produce and respond to strigolactone although the actual biosynthetic pathway might differ from the canonical one of embryophytes (Bowman et al 2019, Nishiyama et al 2018).…”

Section: Resultsmentioning

confidence: 99%

Chromosome-level genomes of multicellular algal sisters to land plants illuminate signaling network evolution

Feng

Zheng

Irisarri

et al. 2023

Preprint

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The filamentous and unicellular algae of the class Zygnematophyceae are the closest algal relatives of land plants. Inferring the properties of the last common ancestor shared by these algae and land plants allows us to identify decisive traits that enabled the conquest of land by plants. We sequenced four genomes of filamentous Zygnematophyceae (three strains of Zygnema circumcarinatum and one strain of Z. cylindricum) and generated chromosome-scale assemblies for all strains of the emerging model system Z. circumcarinatum. Comparative genomic analyses reveal expanded genes for signaling cascades, environmental response, and intracellular trafficking that we associate with multicellularity. Gene family analyses suggest that Zygnematophyceae share all the major enzymes with land plants for cell wall polysaccharide synthesis, degradation, and modifications; most of the enzymes for cell wall innovations, especially for polysaccharide backbone synthesis, were gained more than 700 million years ago. In Zygnematophyceae, these enzyme families expanded, forming co-expressed modules. Transcriptomic profiling of over 19 growth conditions combined with co-expression network analyses uncover cohorts of genes that unite environmental signaling with multicellular developmental programs. Our data shed light on a molecular chassis that balances environmental response and growth modulation across more than 600 million years of streptophyte evolution.

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“…Evidence is mounting that the common ancestor of all land plants was capable of establishing symbiosis with AM fungi ( Rich et al., 2021 ). Information about the gene network regulating AM fungal interactions in liverworts is emerging ( Radhakrishnan et al., 2020 ; Rich et al., 2021 ; Kodama et al., 2022 ). However, due to the deep divergence between hornworts and liverworts some findings may represent liverwort-specific innovations and cannot be generalized.…”

Section: The Unique Biology Of Hornwortsmentioning

confidence: 99%

What can hornworts teach us?

et al. 2023

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The hornworts are a small group of land plants, consisting of only 11 families and approximately 220 species. Despite their small size as a group, their phylogenetic position and unique biology are of great importance. Hornworts, together with mosses and liverworts, form the monophyletic group of bryophytes that is sister to all other land plants (Tracheophytes). It is only recently that hornworts became amenable to experimental investigation with the establishment of Anthoceros agrestis as a model system. In this perspective, we summarize the recent advances in the development of A. agrestis as an experimental system and compare it with other plant model systems. We also discuss how A. agrestis can help to further research in comparative developmental studies across land plants and to solve key questions of plant biology associated with the colonization of the terrestrial environment. Finally, we explore the significance of A. agrestis in crop improvement and synthetic biology applications in general.

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An ancestral function of strigolactones as symbiotic rhizosphere signals

Cited by 63 publications

References 72 publications

Strigol induces germination of the facultative parasitic plant Phtheirospermum japonicum in the absence of nitrate ions

Strigol induces germination of the facultative parasitic plant Phtheirospermum japonicum in the absence of nitrate ions

Chromosome-level genomes of multicellular algal sisters to land plants illuminate signaling network evolution

What can hornworts teach us?

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