The effects of nitrogen uptake before and after heading on grain protein content and the occurrence of basal- and back-white grains in rice (<i>Oryza sativa</i> L.)

Tsukaguchi, Tadashi; Taniguchi, Yae; Ito, Rie

doi:10.1080/1343943x.2016.1223527

Cited by 18 publications

(10 citation statements)

References 19 publications

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“…Tsukaguchi et al . 18 found that protein content (calculated by multiplying N content by a factor of 5.95) in rice grains was most sensitive to plant nitrogen status after heading. However, there have been contradictory results showing that N uptake during grain filling is not always allocated to the grains and that rendering N remobilization from senescing organs acts as a central component for the development of reproductive organs in other cereal crops such as wheat 19 .…”

Section: Discussionmentioning

confidence: 99%

Amino acid content in rice grains is affected by high temperature during the early grain-filling period

Huang

Zhang

Zhao

et al. 2019

Sci Rep

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Amino acid content in grains is an important nutritional quality trait in rice. High temperature can affect rice quality by accelerating grain filling. However, there is limited information available on the influence of high temperature on amino acid content in rice grains, especially under natural conditions. In this study, grain-filling traits and amino acid content in the grain of two rice cultivars (Luliangyou 996 and Lingliangyou 268) were compared between two years (2016 and 2017) with contrasting temperatures during the early grain-filling period under field conditions. Average daily mean temperature during the period of 0–5 days after full heading in 2016 (30.1 °C) was 5.4 °C higher than that in 2017. Initial, maximum, and mean grain-filling rates were 42–307% higher in 2016 than in 2017 for Luliangyou 996 and Lingliangyou 268. The time taken to reach the maximum grain-filling rate and active grain-filling duration were 6.3–10.7 d shorter in 2016 compared to 2017 for Luliangyou 996 and Lingliangyou 268. Grain weight was equal to or significantly higher in 2016 than in 2017 for Luliangyou 996 and Lingliangyou 268. N accumulation and N content in the grain were significantly lower in 2016 than in 2017 for both cultivars. The grain contents of all detected amino acids, except for methionine in Luliangyou 996, were significantly lower in 2016 than in 2017. Our study suggests that high temperature during the early grain-filling period can result in an accelerated grain-filling process, reduced N accumulation and content in rice grains, and consequently reduced amino acid content in the grain.

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Section: Discussionmentioning

confidence: 99%

Amino acid content in rice grains is affected by high temperature during the early grain-filling period

Huang

Zhang

Zhao

et al. 2019

Sci Rep

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“…This method will enable the estimation of the number of spikelets over a wide area. The grain quality of rice is highly associated with the number of spikelets (Tsukaguchi & Iida, 2008;Tsukaguchi et al, 2016aTsukaguchi et al, , 2016b. Thus, our results could be used for precise management to achieve high yield with satisfactory grain quality.…”

Section: Discussionmentioning

confidence: 78%

Estimation of spikelet number per area by UAV-acquired vegetation index in rice (Oryza sativa L.)

Tsukaguchi

Kobayashi

Fujihara

et al. 2021

Plant Production Science

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The objectives of this study were to find the best vegetation index (VI) associated with plant nitrogen content at the reproductive stage in rice, to associate the number of spikelets with this VI and solar radiation, and to estimate the number of spikelets. Rice cultivars Ishikawa 65 and Koshihikari were grown in the field in 2019 and 2020 at various nitrogen application rates and transplanting densities. From 30 days before heading to just after heading, the field was imaged with a multispectral camera. The images were processed with predefined ground control point data to create VI maps. From the maps, VI data were retrieved from the canopy area where plants were harvested for the determination of plant nitrogen content at the reproductive stage and of the number of spikelets at maturity. Among 6 VIs tested, the chlorophyll index green (CI green ) had the highest coefficient of determination (R 2 ) with plant nitrogen content at the reproductive stage and was the only VI with a linear relation with plant nitrogen content. The number of spikelets per unit area was well explained by multiple regression with CI green at 15 days before heading (CIG15) and cumulative solar radiation in the 15 days before heading (CSR15) as independent variables. A higher CIG15 would increase the number of spikelets differentiated and a higher CSR15 would reduce the rate of degeneration by increasing dry matter production.

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“…Rice grain quality is a complex quantitative trait, consisting mainly of processing quality, appearance quality, nutritional quality, cooking and eating quality, etc. (Tsukaguchi et al, 2016;Peng et al, 2016a;Bhullar et al, 2013;Peng et al, 2014b). The detection, analysis, and evaluation of grain quality is crucial in rice genetic breeding program.…”

Section: Prospect Of the Application Of High And New Technology In Gementioning

confidence: 99%

“…Each quality trait is controlled by multiple genes, involving a variety of gene expression regulation and regulatory networks, and easily affected by external environmental factors, such as light, temperature and soil conditions (Chen et al, 2012;Zhang et al, 2016). At present, rice grain quality is generally considered the grain appearance and milling, eating, cooking, and nutritional qualities (Tsukaguchi et al, 2016;Pandey et al, 2012;Bhullar et al, 2013;Peng et al, 2014b). However, people in different countries and regions have different concerns about various grain quality traits in rice.…”

Section: Introductionmentioning

confidence: 99%

Genetic Improvement of Grain Quality Promoted by High and New Technology in Rice

Peng¹,

Li²,

Kong³

et al. 2018

JAS

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Rice (Oryza sativa L.) is considered as one of the most important food crops all over the world. Because of the improvement of the actual living standards, there is more and more demand for improved grain quality. Although, the grain quality is a very complex quantitative trait in rice, it has great scientific significance and practical application value for the improvement of the quality of rice grain using high and up to date techniques. Here, we focus on the new advances in the application of the genetic improvement of grain quality by high throughput sequencing, genomic editing, near infrared spectroscopy, scanning electron microscopy, and other new techniques. Simultaneously, the application prospects of these high and up to date techniques have also been expected in the genetic improvement of rice quality. Thus, this will provide important information for genetic improvement of grain quality in rice breeding.

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The effects of nitrogen uptake before and after heading on grain protein content and the occurrence of basal- and back-white grains in rice (Oryza sativa L.)

Cited by 18 publications

References 19 publications

Amino acid content in rice grains is affected by high temperature during the early grain-filling period

Amino acid content in rice grains is affected by high temperature during the early grain-filling period

Estimation of spikelet number per area by UAV-acquired vegetation index in rice (Oryza sativa L.)

Genetic Improvement of Grain Quality Promoted by High and New Technology in Rice

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