Biochemical defenses of rice against Bipolaris oryzae increase with high atmospheric concentration of CO2

Dorneles, Keilor da Rosa; Refatti, João Paulo; Pazdiora, Paulo César; Avila, Luis Antônio de; Deuner, Sidnei; Dallagnol, Leandro José

doi:10.1016/j.pmpp.2020.101484

Cited by 6 publications

(2 citation statements)

References 21 publications

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“…Polyphenolic compounds [13][14][15] and callose [16] are among the substances implicated in defence. Biochemical defences have also been studied, e.g., defence-related enzymes [17] and phytoalexins [18]. Hydrogen peroxide accumulation has also been reported in relation to infection by B. oryzae [15,[19][20][21], but the role appears to be unclear.…”

Section: Introductionmentioning

confidence: 99%

Infection Biology of Bipolaris oryzae in Rice and Defence Responses in Compatible and Less Compatible Interactions

et al. 2023

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The infection biology of Bipolaris oryzae and the defence responses of its host rice were studied using the rice cv. MTL 189 inoculated with two isolates of B5 (highly compatible with MTL 189) and K2 (less compatible). In the former interaction, the hyphal progress was accompanied by tissue degradation and extensive sporulation after 8 days, whereas in the latter interaction, only very limited tissue degradation and sporulation was observed. Quantitative microscopy of the infection showed that the percentages of conidia and appressoria causing penetration and fluorescent epidermal cells (FEC) were lower for isolate K2 than for isolate B5 at 12 and 24 hours after inoculation (hai). Fluorescent papillae (FP) were only seen in the less compatible interaction and the percentage of conidia causing single FEC was highest in the less compatible interaction at 12 hai, but not at 24 hai. Qualitative examination of other defence responses showed that H2O2 started to accumulate at 4 hai in the less compatible interaction, whereas it appeared in the compatible interaction only at 12 hai. The level of H2O2 was generally higher in the less compatible than in the compatible interaction. Cross sections of leaves showed that H2O2 accumulated in the outer walls of epidermal cells. Likewise, accumulation of callose and polyphenolic substances was most pronounced in the less compatible interaction and occurred at the same places as H2O2. To our knowledge, this is the first report implicating H2O2 as an early defence response against the hemibiotrophic pathogen B. oryzae during early infection stages in rice. Understanding defence reactions may aid in resistance breeding.

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Section: Introductionmentioning

confidence: 99%

Infection Biology of Bipolaris oryzae in Rice and Defence Responses in Compatible and Less Compatible Interactions

et al. 2023

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“…Additionally, we also identified a notable positive correlation between Bipolaris and the content of 11 flavonoids, suggesting a potential relationship between the presence of Bipolaris and flavonoid levels. Bipolaris, specifically Bipolaris oryzae, is renowned for causing rice blast (Dorneles et al, 2020) as well as spot disease in diverse crops, including wheat (Zaccaron and Bluhm, 2017;Meng et al, 2020;Manzar et al, 2022). It is noteworthy that Bipolaris secondary metabolites are rich in flavonoids and other polyphenols, although their applications in this area still necessitate further development (Das et al, 2017;Muthukrishnan et al, 2022).…”

Section: Discussionmentioning

confidence: 99%

The diversity of endophytic fungi in Tartary buckwheat (Fagopyrum tataricum) and its correlation with flavonoids and phenotypic traits

Chen,

Ding,

Zhou

et al. 2024

Front. Microbiol.

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Tartary buckwheat (Fagopyrum tataricum) is a significant medicinal crop, with flavonoids serving as a crucial measure of its quality. Presently, the artificial cultivation of Tartary buckwheat yields low results, and the quality varies across different origins. Therefore, it is imperative to identify an effective method to enhance the yield and quality of buckwheat. Endophytic fungi reside within plants and form a mutually beneficial symbiotic relationship, aiding plants in nutrient absorption, promoting host growth, and improving secondary metabolites akin to the host. In this study, high-throughput sequencing technology was employed to assess the diversity of endophytic fungi in Tartary buckwheat. Subsequently, a correlation analysis was performed between fungi and metabolites, revealing potential increases in flavonoid content due to endophytic fungi such as Bipolaris, Hymenula, and Colletotrichum. Additionally, a correlation analysis between fungi and phenotypic traits unveiled the potential influence of endophytic fungi such as Bipolaris, Buckleyzyma, and Trichosporon on the phenotypic traits of Tartary buckwheat. Notably, the endophytic fungi of the Bipolaris genus exhibited the potential to elevate the content of Tartary buckwheat metabolites and enhance crop growth. Consequently, this study successfully identified the resources of endophytic fungi in Tartary buckwheat, explored potential functional endophytic fungi, and laid a scientific foundation for future implementation of biological fertilizers in improving the quality and growth of Tartary buckwheat.

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Silicon complements disease control by fungicides by enhancing the biochemical defense responses of barley against Bipolaris sorokiniana

Holz,

Dorneles,

Brunetto

et al. 2023

J Plant Pathol

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Biochemical defenses of rice against Bipolaris oryzae increase with high atmospheric concentration of CO2

Cited by 6 publications

References 21 publications

Infection Biology of Bipolaris oryzae in Rice and Defence Responses in Compatible and Less Compatible Interactions

Infection Biology of Bipolaris oryzae in Rice and Defence Responses in Compatible and Less Compatible Interactions

The diversity of endophytic fungi in Tartary buckwheat (Fagopyrum tataricum) and its correlation with flavonoids and phenotypic traits

Silicon complements disease control by fungicides by enhancing the biochemical defense responses of barley against Bipolaris sorokiniana

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