Natural variation of diterpenoid phytoalexins in cultivated and wild rice species

Kariya, Keisuke; Ube, Naoki; Ueno, Makoto; Teraishi, Masayoshi; Okumoto, Yutaka; Mori, Naoki; Ueno, Kotomi; Ishihara, Atsushi

doi:10.1016/j.phytochem.2020.112518

Cited by 29 publications

(46 citation statements)

References 48 publications

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“…Therefore, it was concluded that the reduced expression level of KSL10 caused the nonaccumulation of oryzalexin A in majority of the rice cultivars. Large differences in accumulated amounts among cultivars were observed for momilactones A and B and phytocassanes A and D. 65) However, the differences were not as extreme as those observed for oryzalexin A, and most of the cultivars accumulated momilactones and phytocassanes to a great or less extent. Therefore, momilactones and phytocassanes can be regarded as basic phytoalexins in rice.…”

Section: Natural Variation Of Diterpenoid Phytoalexins In Ricementioning

confidence: 75%

“…5B). 65) Oryzalactone was accumulated in only three cultivars in the WRC, whereas phytocassane G was accumulated in virtually all the cultivars. It was speculated that oryzalactone is a recently created phytoalexin in the evolutionary history of rice because of its limited distribution in rice cultivars.…”

Section: Natural Variation Of Diterpenoid Phytoalexins In Ricementioning

confidence: 91%

“…In addition to flavonoid phytoalexins (sakuranetin and naringenin), the natural variation in diterpenoid phytoalexins, including oryzalexin A, 64) momilactones, and phytocassanes were investigated. 65) The treatment with jasmonic acid did not induce the accumulation of diterpenoid phytoalexins 66) ; therefore, the leaves of rice seedlings were irradiated with ultraviolet (UV) light. The analysis indicated that the concentration of oryzalexin A was lower than the detection limit in majority of the cultivars in the WRC, regardless of the difference in the subspecies (Fig.…”

Section: Natural Variation Of Diterpenoid Phytoalexins In Ricementioning

confidence: 99%

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Defense mechanisms involving secondary metabolism in the grass family

Ishihara

2021

J. Pestic. Sci.

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Plants synthesize and accumulate a wide variety of compounds called secondary metabolites. Secondary metabolites serve as chemical barriers to protect plants from pathogens and herbivores. Antimicrobial secondary metabolites are accumulated to prevent pathogen infection. These metabolites are classified into phytoalexins (induced in response to pathogen attack) and phytoanticipins (present prior to pathogen infection). The antimicrobial compounds in the grass family (Poaceae) were studied from the viewpoint of evolution. The studies were performed at three hierarchies, families, genera, and species and include the following: 1) the distribution of benzoxazinoids (Bxs) in the grass family, 2) evolutionary replacement of phytoanticipins from Bxs to hydroxycinnamic acid amide dimers in the genus Hordeum, and 3) chemodiversity of flavonoid and diterpenoid phytoalexins in rice. These studies demonstrated dynamic changes in secondary metabolism during evolution, indicating the adaptation of plants to their environment by repeating scrap-and-build cycles.

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Section: Natural Variation Of Diterpenoid Phytoalexins In Ricementioning

confidence: 75%

Section: Natural Variation Of Diterpenoid Phytoalexins In Ricementioning

confidence: 91%

Section: Natural Variation Of Diterpenoid Phytoalexins In Ricementioning

confidence: 99%

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Defense mechanisms involving secondary metabolism in the grass family

Ishihara

2021

J. Pestic. Sci.

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“…Several species of the Poales, the economically most important order of plants, produce such allelochemicals, but their chemical nature can be quite diverse. For example, maize, wheat, and rye all produce benzoxazinoids (BX) [3][4][5], while many rice cultivars produce diterpenes such as momilactone B [6][7][8]. There is currently no example of a species that is capable of producing both momilactone B and BX compounds.…”

Section: Introductionmentioning

confidence: 99%

Transcriptional response of a target plant to benzoxazinoid and diterpene allelochemicals highlights commonalities in detoxification

Knoch

Kovács

Deiber

et al. 2022

Preprint

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Plants growing in proximity to other plants are exposed to a variety of metabolites that these neighbors release into the environment. Some species produce allelochemicals to inhibit growth of neighboring plants, which in turn have evolved ways to detoxify these compounds. In order to understand how the allelochemical-receiving target plants respond to chemically diverse compounds, we performed whole-genome transcriptome analysis of Arabidopsis thaliana exposed to either the benzoxazinoid derivative 2-amino-3H-phenoxazin-3-one (APO) or momilactone B. These two allelochemicals belong to two very different compound classes, benzoxazinoids and diterpenes, respectively, produced by different cereal crop species. Despite their distinct chemical nature, we observed similar molecular responses of A. thaliana to these allelochemicals. In particular, many of the same or closely related genes belonging to the three-phase detoxification pathway were upregulated in both treatments. Further, we observed an overlap between genes upregulated by allelochemicals and those involved in herbicide detoxification. Our findings highlight the overlap in the transcriptional response of a target plant to natural and synthetic phytotoxic compounds and illustrate how herbicide resistance could arise via pathways involved in plant-plant interaction.

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“…Several species of the Poaceae, the economically most important order of plants, produce such allelochemicals, but their chemical nature can be quite diverse. For example, maize, wheat, and rye all produce benzoxazinoids (BX) [3][4][5], while many rice cultivars produce diterpenes such as momilactone B [6][7][8]. There is currently no example of a species that is capable of producing both momilactone B and BX compounds.…”

Section: Introductionmentioning

confidence: 99%

Transcriptional response of a target plant to benzoxazinoid and diterpene allelochemicals highlights commonalities in detoxification

et al. 2022

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Background Plants growing in proximity to other plants are exposed to a variety of metabolites that these neighbors release into the environment. Some species produce allelochemicals to inhibit growth of neighboring plants, which in turn have evolved ways to detoxify these compounds. Results In order to understand how the allelochemical-receiving target plants respond to chemically diverse compounds, we performed whole-genome transcriptome analysis of Arabidopsis thaliana exposed to either the benzoxazinoid derivative 2-amino- 3H-phenoxazin-3-one (APO) or momilactone B. These two allelochemicals belong to two very different compound classes, benzoxazinoids and diterpenes, respectively, produced by different Poaceae crop species. Conclusions Despite their distinct chemical nature, we observed similar molecular responses of A. thaliana to these allelochemicals. In particular, many of the same or closely related genes belonging to the three-phase detoxification pathway were upregulated in both treatments. Further, we observed an overlap between genes upregulated by allelochemicals and those involved in herbicide detoxification. Our findings highlight the overlap in the transcriptional response of a target plant to natural and synthetic phytotoxic compounds and illustrate how herbicide resistance could arise via pathways involved in plant-plant interaction.

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Natural variation of diterpenoid phytoalexins in cultivated and wild rice species

Cited by 29 publications

References 48 publications

Defense mechanisms involving secondary metabolism in the grass family

Defense mechanisms involving secondary metabolism in the grass family

Transcriptional response of a target plant to benzoxazinoid and diterpene allelochemicals highlights commonalities in detoxification

Transcriptional response of a target plant to benzoxazinoid and diterpene allelochemicals highlights commonalities in detoxification

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