Responses of Flavonoids, Phenolics, and Antioxidant Activity in Rice Seedlings between Japonica and Indica Subtypes to Chilling Stress

Rayee, Ramin; Xuan, Tran Dang; Tran, Hoang-Dung; Fakoori, Naqib Ahmad; Khanh, Tran Dang; Dat, Tran Dang

doi:10.18052/www.scipress.com/ilns.77.41

Cited by 2 publications

(1 citation statement)

References 35 publications

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“…Phenol production is considered the primary line of defense in plants against pathogens and herbivores 36 . Phenols are involved in the elimination of ROS, reducing oxidative damage 37 . In this study, regardless of cultivar and herbicide treatment, cold stress increased total phenols in rice seedlings.…”

Section: Resultsmentioning

confidence: 54%

Acclimation to cold stress reduces injury from low temperature and bispyribac‐sodium on rice

Martini

Roma‐Burgos

Tseng

et al. 2021

Pest Management Science

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BACKGROUND In subtropical areas, early planting exposes rice seedlings to cold stress, impairing seedling growth and making them more vulnerable to other stresses including herbicide injury. The objectives of this work were: to evaluate the effect of cold stress on bispyribac‐sodium selectivity in rice; to determine the mechanisms of cold tolerance in sensitive (‘Epagri 109’) and tolerant (‘IRGA 424’) rice cultivars; and to ascertain that cold acclimatization influences bispyribac‐sodium selectivity in rice. RESULTS Prolonged cold stress caused high lipid peroxidation, increased rice injury, and stunted growth. Short‐term acclimation with cold stress reduced rice injury with bispyribac‐sodium. Total phenols were upregulated in rice exposed to cold stress. Prolonged cold stress increased the superoxide dismutase and catalase activity in IRGA 424. Antioxidant activity was higher in the cold‐tolerant than in the cold‐sensitive cultivar. Only catalase activity was responsive to bispyribac‐sodium. OsRAN2, OsGSTL2, and CYP72A21 were upregulated by cold and herbicide stress in both cultivars. OsGSTL2 was upregulated more in IRGA 424 than in Epagri 109. OsFAD8 was upregulated in cold‐sensitive rice exposed to short‐duration cold stress but was not responsive to bispyribac‐sodium. CONCLUSION Cold stress reduces bispyribac‐sodium selectivity in rice. Short‐term acclimation to cold stress reduces the effect of cold stress and enhances bispyribac‐sodium selectivity. The tolerance of rice (IRGA 424) to cold stress is due to differential induction of protection genes CYP72A21 and OsGSTL2 associated with herbicide metabolism, together with the accumulation of total phenols and higher activity of antioxidant enzymes.

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Section: Resultsmentioning

confidence: 54%

Acclimation to cold stress reduces injury from low temperature and bispyribac‐sodium on rice

Martini

Roma‐Burgos

Tseng

et al. 2021

Pest Management Science

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Rice Momilactones and Phenolics: Expression of Relevant Biosynthetic Genes in Response to UV and Chilling Stresses

et al. 2022

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Momilactones A (MA) and B (MB) are known as phytoalexins which principally play a role in the rice defense system against pathogens. This is the first study revealing that MA and MB contribute to rice tolerance to environmental stresses, including ultraviolet (UV) radiation and chilling conditions. The proofs were achieved by scrutinizing the responses of rice under stresses through the expression of relevant biosynthetic genes to momilactones (MRBG) and phenolics (PRBG) and their accumulation. Accordingly, the expression tendency of PRBG was in line with that of MRBGs, which increased under UV irradiation but decreased under chilling conditions. In UV-exposed rice, the proliferation of MA and MB strongly correlated to that of salicylic and chlorogenic acids, esculetin, rutin, and fisetin. In terms of increasing chilling duration, the biosynthetic propensity of MB was consistent with that of benzoic, cinnamic, ρ-coumaric, salicylic, and syringic acids, quercetin, and tricin while the syntheses of MA and other compounds were reduced. The concomitant biosyntheses of momilactones with these acknowledged stress-resistant phenolics imply that momilactones might play a role as signaling molecules in the response mechanism of rice to UV and chilling stresses. Further comprehensive studies should be conducted to validate this paradigmatic finding.

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Responses of Flavonoids, Phenolics, and Antioxidant Activity in Rice Seedlings between Japonica and Indica Subtypes to Chilling Stress

Cited by 2 publications

References 35 publications

Acclimation to cold stress reduces injury from low temperature and bispyribac‐sodium on rice

Acclimation to cold stress reduces injury from low temperature and bispyribac‐sodium on rice

Rice Momilactones and Phenolics: Expression of Relevant Biosynthetic Genes in Response to UV and Chilling Stresses

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