Characteristics of root‐associated bacterial community and nitrogen biochemical properties of two Japonica rice cultivars with different yields

Abstract: In the present study, germinated brown rice (GBR) from three Japonica and three Indica rice cultivars were subjected to metabolomics analysis and volatile profiling. The statistical assessment and pathway analysis of the metabolomics data demonstrated that in spite of significant metabolic changes in response to the germination treatment, the Japonica rice cultivars consistently expressed higher levels of several health-promoting compounds, such as essential amino acids and γ-aminobutyric acid (GABA), than the Indica cultivars. No clear discriminations of the volatile profiles were observed in light of the subspecies, and the concentrations of the volatile organic compounds (VOCs), including alkenes, aldehydes, furans, ketones, and alcohols, all exhibited significant reductions ranging from 26.8% to 64.1% after the germination. The results suggest that the Japonica cultivars might be desirable as the raw materials for generating and selecting GBR food products for health-conscious consumers.

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Critical Factors for Grain Filling of Erect Panicle Type Japonica Rice Cultivars

Agronomy Journal ◽

10.2134/agronj2012.0272 ◽

2013 ◽

Vol 105 (5) ◽

pp. 1404-1410 ◽

Cited By ~ 5

Author(s):

Xing‐Tao Li ◽

Hai‐Tao Cheng ◽

Ning Wang ◽

Cui‐Mei Yu ◽

Lu‐Yi Qu ◽

...

Keyword(s):

Grain Filling ◽

Japonica Rice ◽

Rice Cultivars ◽

Critical Factors

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Temperature-Response of Photosynthesis, Respiration, CO2 Balance and Growth in High-Yielding Japonica and Indica x Japonica Rice Cultivars at Young Stage

Research in Photosynthesis ◽

10.1007/978-94-009-0383-8_104 ◽

1992 ◽

pp. 461-464

Author(s):

Chang Ho Soh ◽

Yong Woong Kwon

Keyword(s):

Temperature Response ◽

Japonica Rice ◽

Rice Cultivars ◽

Co2 Balance ◽

Young Stage

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Evaluation of Rice Responses to the Blast Fungus Magnaporthe oryzae at Different Growth Stages

Plant Disease ◽

10.1094/pdis-12-17-1873-re ◽

2019 ◽

Vol 103 (1) ◽

pp. 132-136 ◽

Cited By ~ 3

Author(s):

Xinglong Chen ◽

Yulin Jia ◽

Bo Ming Wu

Keyword(s):

Disease Severity ◽

Magnaporthe Oryzae ◽

Rice Blast ◽

Growth Stage ◽

Disease Index ◽

Blast Disease ◽

Growth Stages ◽

Japonica Rice ◽

Rice Cultivars ◽

Different Growth Stages

Rice blast, caused by the fungus Magnaporthe oryzae, is the most damaging disease for rice worldwide. However, the reactions of rice to M. oryzae at different growth stages are largely unknown. In the present study, two temperate japonica rice cultivars, M-202 and Nipponbare, were inoculated synchronously at different vegetative growth stages, V1 to V10. Plants of M-202 at each stage from V1 to reproductive stage R8 were inoculated with M. oryzae race (isolate) IB-49 (ZN61) under controlled conditions. Disease reactions were recorded 7 days postinoculation by measuring the percentage of diseased area of all leaves, excluding the youngest leaf. The results showed that the plants were significantly susceptible at the V1 to V4 stages with a disease severity of 26.7 to 46.8% and disease index of 18.62 to 37.76 for M-202. At the V1 to V2 stages, the plants were significantly susceptible with a disease a severity of 28.6 to 39.3% and disease index of 23.65 to 29.82 for Nipponbare. Similar results were observed when plants of M-202 were inoculated at each growth stage with a disease severity of 29.7 to 60.6% and disease index of 21.93 to 59.25 from V1 to V4. Susceptibility decreased after the V5 stage (severity 4.6% and index 2.17) and became completely resistant at the V9 to V10 stages and after the reproductive stages, suggesting that plants have enhanced disease resistance at later growth stages. These findings are useful for managing rice blast disease in commercial rice production worldwide.

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Positional variations in chalky occurrence within a rice panicle and its relation to grain nutritional quality

Australian Journal of Agricultural Research ◽

10.1071/ar06138 ◽

2007 ◽

Vol 58 (2) ◽

pp. 95 ◽

Cited By ~ 8

Author(s):

Fangmin Cheng ◽

Yi Liu ◽

Zhenghui Liu ◽

Ningchun Zhao ◽

Feng Wang ◽

...

Keyword(s):

Protein Content ◽

Phytic Acid ◽

Nutritional Quality ◽

Positional Distribution ◽

Japonica Rice ◽

Rice Cultivars ◽

Source Sink ◽

White Belly

The effect of grain position within a panicle on chalky occurrence, and its relation to phytic acid and protein content, were studied using 6 Japonica rice cultivars with compact panicles and through leaf and floret removal treatments to alter source-sink ratio. There were significant differences in total chalky grain (TCG), white core grain (WCG), white belly grain (WBG), and WCG/WBG among grains within a panicle, with the top and primary rachides having higher WBG than the bottom and secondary rachides. Alteration of source-sink ratio had a remarkable influence on chalky grain occurrence and its positional distribution within a panicle, and the extent of the influence varied greatly with cultivars. In comparison with WCG, WBG occurrence was more susceptible to the alteration of source-sink ratio. No significant correlation was found between chalky percentage and phytic acid and protein contents for the grains in the different positions within a panicle. Chalky occurrence had little effect on the nutritional quality.

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