Imposed Water Deficit after Anthesis for the Improvement of Macronutrients, Quality, Phytochemicals, and Antioxidants in Rice Grain

Rayee, Ramin; Tran, Hoang-Dung; Xuan, Tran Dang; Khanh, Tran Dang

doi:10.3390/su10124843

Cited by 18 publications

(16 citation statements)

References 43 publications

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“…The 10-day interval water stress condition after transplanting affected to increase anthocyanin both in drought tolerant and sensitive varieties (Khan et al, 2017). A similar response was reported by Rayee et al (2018) reporting that anthocyanin in japonica and indica rice varieties greatly enhanced by the 3-day interval of water deficit after anthesis to harvest. However, the response of anthocyanin concentration to water condition is variable, depending on several key factors such as the degree of water restriction and microclimates (Esteban et al, 2001;He et al, 2010).…”

Section: Zn Fe Yieldsupporting

confidence: 81%

Variation in nutritional quality of pigmented rice varieties under different water regimes

Jaksomsak

Rerkasem

Prom‐u‐thai

2020

Plant Production Science

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This study evaluated grain anthocyanin, zinc (Zn) and iron (Fe) concentrations, and grain yield of eleven purple rice varieties (PP1-PP11) grown under wetland (W+) and aerobic conditions (W0) in 2 years. There was a significant variation in the concentrations of anthocyanin, Zn and Fe, by water regime and year among the varieties with a wide range of anthocyanin (1-117 mg 100 g −1) and narrower ranges of Zn (19-41 mg kg −1) and Fe (6-19 mg kg −1) concentrations. The nutritional quality in aerobic grown rice was lower than wetland grown among the varieties with higher levels of anthocyanin (>40 mg 100 g −1), Zn (>30 mg kg −1) and Fe (>15 mg kg −1), with smaller effects of water among varieties in the lower quality ranges. The lowering of anthocyanin in aerobic grown rice was observed in the two varieties of the upland ecotype that were highest in anthocyanin concentration, as well as some wetland varieties. The grain yield (1.4-6.7 Mg ha −1) was associated negatively with grain Zn concentration (r = −0.50, P ≤ 0.001), but not with grain Fe (r = −0.14, NS 0.05) or anthocyanin (r = −0.27, NS 0.05). The anthocyanin concentration in the purple rice increased with Zn concentration (r = 0.57, P ≤ 0.001). Wetland condition was shown to be more favorable than aerobic culture for intense pigmentation in the production of purple rice, as well as higher Zn and Fe concentrations.

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Section: Zn Fe Yieldsupporting

confidence: 81%

Variation in nutritional quality of pigmented rice varieties under different water regimes

Jaksomsak

Rerkasem

Prom‐u‐thai

2020

Plant Production Science

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“…The results were in agreement with a previous report by Oh et al, which showed that the drought stress induced by withholding water for 4 days improved the TPC and TAC in lettuce [15]. Furthermore, numerous studies have shown that drought stress enhances one or both enzymatic and nonenzymatic antioxidants in a wide range of plants [31][32][33][34][35]. Moderate drought stress can improve plant drought tolerance, and enhance the antioxidant system [30,36].…”

Section: Bioactive Compounds Antioxidant Activity and Plant Growthsupporting

confidence: 92%

Optimal Duration of Drought Stress Near Harvest for Promoting Bioactive Compounds and Antioxidant Capacity in Kale with or without UV-B Radiation in Plant Factories

Yoon

Zhang

Son

2020

Plants

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Among abiotic stresses, both drought and UV-B radiation effectively trigger the accumulation of secondary metabolites, and can be widely applied in plant factories. The objectives of this study were to investigate antioxidant accumulation under drought stress alone, or in combination with UV-B radiation near harvest, and to determine an optimal treatment time for maximum antioxidant production. Kale (Brassica oleracea L. var. acephala) plants were grown in a plant factory and harvested at 42 days after transplanting. The single and combination treatments lasted for 7 to 1 days and 4 to 2 days before harvest, respectively. The results of both Fv/Fm (maximal photochemical efficiency in photosystem II) and leaf water potential could ensure the function of photosynthesis and maintain normal leaf moisture in single drought treatments of less than 4 days. The total phenolic and flavonoid contents and antioxidant activities were significantly increased in both single and combination treatments for 3 to 4 days, compared to other treatments. The supplementary UV-B treatments showed no extra formation of antioxidants compared to the single drought treatments. As a result, drought for 3 days before harvest could achieve the highest potential value of kale as a source of natural antioxidants.

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“…Total phenolic content (TFC) were strongly accelerated in both rice cultivars (Table 2). In this study, the TFC in rice leaves and roots under chilling stress was higher as compared to the TFC in a previous study under water deficit stress [26]. The TFC included both free and bound form in leaves and roots was associated with the reduced temperature ( Table 2).…”

Section: Discussioncontrasting

confidence: 41%

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

Rayee

Xuan

Tran

et al. 2020

ILNS

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Chilling is one of the major abiotic stress which limites yield and quality of many crops. The seedlings of rice varieties namely Koshihikari (Japonica subtype) chilling tolerant, and the susceptible NMR2 (Indica subtype) were treated at 25/15 °C and 5/4 °C day/night to determine the growth parameters, phenolic contents, and antioxidant activity. It was found that in all treatments, the growth of MNR2 including root and shoot lengths, and leaf and root weights were inhibited at greater levels than Koshihikari. There were seven phenolic acids identified in leaves of Koshihikari including caffeic acid, vanillin, ferulic acid, sinapic acid, benzoic acid, ellagic acid, and cinamic acid, but only benzoic acid and ellagic acid were found in leaves of MNR2. In contrast, only vanillic acid and ellagic acid were observed in roots of Koshihikari, whilst ellagic acid and cinnamic acid were found in roots of MNR2. It was found that rice reduced amount of phenolic acids but promoted quantity of total phenolic content (TPC) and total flavonoid content (TFC) and level of antioxidant activity in chilling stress, although the level of responses varied between Japonica and Indica subtypes. Tolerant rice possessed greater bound flavonoids, phenolics and phenolic acids, but susceptible rice accumulated greater free TPC and TFC in reduced temperature. Findings of this study highlighted that phenolic constituents in bound forms of phenols, polyphenols, and flavonoids may play an active role in rice plants than phenolic acids under chilling stress but need further elaboration.

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Imposed Water Deficit after Anthesis for the Improvement of Macronutrients, Quality, Phytochemicals, and Antioxidants in Rice Grain

Cited by 18 publications

References 43 publications

Variation in nutritional quality of pigmented rice varieties under different water regimes

Variation in nutritional quality of pigmented rice varieties under different water regimes

Optimal Duration of Drought Stress Near Harvest for Promoting Bioactive Compounds and Antioxidant Capacity in Kale with or without UV-B Radiation in Plant Factories

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

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