High Risk of the Formation of Milky White Rice Kernels in Cultivars with Higher Potential Grain Growth Rate under Elevated Temperatures

Kobata, Tohru; Miya, N.T.N.; Anh, Nguyen Thi Nguyet

doi:10.1626/pps.14.359

Cited by 6 publications

(3 citation statements)

References 10 publications

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“…Studies had shown that the formation of chalkiness was closely associated with the grain-filling process. The increased temperature led to the obvious acceleration of early grain-filling rate and rapid decline in the mid-late period, resulting in poor filling of starch granules and PBs in the endosperm, which could further induce a large number of gaps, and thus forming chalkiness (Ito et al, 2009 ; Kobata et al, 2011 ). Both this study and our previous studies have shown that elevated temperature increased the rate of grain filling and significantly accelerated the development of endosperm ( Figure 2 ).…”

Section: Discussionmentioning

confidence: 99%

Nitrogen Fertilizer Regulated Grain Storage Protein Synthesis and Reduced Chalkiness of Rice Under Actual Field Warming

Wang

Yin

et al. 2021

Front. Plant Sci.

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Our previous study has shown that nitrogen plays an important role in dealing with significantly increased chalkiness caused by elevated temperature. However, the role of nitrogen metabolites has not been given sufficient attention, and its regulatory mechanism is not clear. This study investigated the effects of high temperature and nitrogen fertilizer on the synthesis of grain storage protein and further explored the quality mechanism under the actual scenario of field warming. Results showed that increased temperature and nitrogen fertilizer could affect the activities of nitrogen metabolism enzymes, namely, glutamate synthetase, glutamine synthetase, glutamic pyruvic transaminase, and glutamic oxaloacetic transaminase, and the expressions of storage protein synthesis factor genes, namely, GluA and GluB, and subfamily genes, namely, pro14, BiP1, and PDIL1, which co-induced the changes of storage protein synthesis in rice grains. Furthermore, the increased temperature changed the balance of grain storage substances which may lead to the significantly increased chalky rate (197.67%) and chalkiness (532.92%). Moreover, there was a significant negative correlation between prolamin content and chalkiness, indicating that nitrogen fertilizer might regulate the formation of chalkiness by affecting the synthesis of prolamin. Results suggested that nitrogen application could regulate the related core factors involved in nitrogen metabolism pathways, which, in turn, affects the changes in the storage protein components in the grain and further affects quality. Therefore, as a conventional cultivation measure, nitrogen application would have a certain value in future rice production in response to climate warming.

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Section: Discussionmentioning

confidence: 99%

Nitrogen Fertilizer Regulated Grain Storage Protein Synthesis and Reduced Chalkiness of Rice Under Actual Field Warming

Wang

Yin

et al. 2021

Front. Plant Sci.

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“…However, the rate of assimilate supply to the grain plays an important role in the achievement of grain weight and quality under high temperatures during the grainfilling period . The grain-filling rate is higher in a high temperature sensitive cultivar such as 'Hatsuboshi, ' which frequently shows milky white kernels (mostly constituting chalky grains), than in an insensitive cultivar such as 'Koshijiwase' (Kobata et al, 2011) (Figure 1). These facts suggest that the occurrence of milky white kernels caused by high-temperature stress is the result of an assimilate supply limit during the active grain-filling period, not a reduction of sink capacity.…”

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confidence: 99%

Molecular physiological aspects of chalking mechanism in rice grains under high-temperature stress

Mitsui

Yamakawa

Kobata

2016

Plant Production Science

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“…imperfect rice ker-nels including chalky grain; Nagato et al, 1960;Nagato and Ebata, 1965;Tashiro and Wardlaw, 1991). Hightemperature-induced deterioration of rice production is occurring worldwide concomitantly with recent global warming (Jagadish et al, 2007;Oh-e et al, 2007;Kobata et al, 2011). As a countermeasure to this, the breeding of new rice cultivars tolerant to high temperatures which includes metabolic changes, is progressing but it is not satisfactory at present (Ishimaru et al, 2016;Morita et al, 2016;Tayade et al, 2018;Fahad et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Development of an Air-Curtain Roof Chamber to Assess Climate Change Effects on Crop Plants: A Study with Rice

Imai

Yamamoto

Honma

et al. 2021

Environmental Control in Biology

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To elucidate effects of climate change on growth and yield of crop plants, we developed a new growth chamber with an air-curtain shed roof. The chamber space was divided into two: one side followed outdoor temperature and the other side was several degrees higher than the outdoor temperature. Furthermore, we tried to assess the real temperature effect by achieving the same vapor pressure deficit (VPD) in two divided spaces and grew rice plants from seedling to maturity stages as an experimental material. For the high temperature (HT) plot, we adopted +4 of the outdoor-temperature-following (control; CONT) plot because, in a preliminary experiment, +5of CONT induced sterility in most grains. The HT conditions advanced the day to flowering of rice, but its grain yield was lower than those obtained under CONT conditions. Trial of the same VPD under HT and CONT conditions suggested that the effect of VPD on rice growth and yield was not large during the June October growth season.

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High Risk of the Formation of Milky White Rice Kernels in Cultivars with Higher Potential Grain Growth Rate under Elevated Temperatures

Cited by 6 publications

References 10 publications

Nitrogen Fertilizer Regulated Grain Storage Protein Synthesis and Reduced Chalkiness of Rice Under Actual Field Warming

Nitrogen Fertilizer Regulated Grain Storage Protein Synthesis and Reduced Chalkiness of Rice Under Actual Field Warming

Molecular physiological aspects of chalking mechanism in rice grains under high-temperature stress

Development of an Air-Curtain Roof Chamber to Assess Climate Change Effects on Crop Plants: A Study with Rice

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