We used a widely targeted metabolomics approach to examine the metabolic changes in three pedigreed indica cultivars(Meixiangzhan 2,Meisizhan and Qixinzhan),with different eating qualities,at 8,15 and 30 d after flowe...We used a widely targeted metabolomics approach to examine the metabolic changes in three pedigreed indica cultivars(Meixiangzhan 2,Meisizhan and Qixinzhan),with different eating qualities,at 8,15 and 30 d after flowering(DAF)to explore the formation mechanism of rice eating and nutritional qualities at a global metabolic level.A total of 623 metabolites were identified,and results showed that metabolic variations among rice cultivars decreased with grain developmental stage,suggesting that sufficient carbohydrate and amino acid supply during grain development may contribute to excellent rice eating and nutritional quality formation.Lysophosphatidylcholines 19:0 and 16:1 were beneficial for excellent eating quality formation during grain development.Rice fragrance was attributed mainly to spermidine andγ-aminobutyric acid.Rice cultivars with excellent eating quality at 15-30 DAF had relatively higher flavone content,possibly because they had adequate carbohydrate and amino acid contents during grain development.These results provided insight into the mechanisms for establishing rice eating and nutritional qualities during grain formation at a global metabolic level,and can be applied towards improving rice quality.展开更多
了解大气CO2浓度升高对粳稻和籼稻稻米品质的影响,为今后合理筛选育种材料提供依据。以粳稻Asominori与籼稻IR24为材料,田间试验,于2003年和2004年连续2年在FACE(Free Air CO2 Enrichment,大气CO2浓度增加200μmol/mol)和正常大气CO2浓...了解大气CO2浓度升高对粳稻和籼稻稻米品质的影响,为今后合理筛选育种材料提供依据。以粳稻Asominori与籼稻IR24为材料,田间试验,于2003年和2004年连续2年在FACE(Free Air CO2 Enrichment,大气CO2浓度增加200μmol/mol)和正常大气CO2浓度(约370μmol/mol)下,分析了稻米的加工品质、外观品质和蒸煮食味品质。与对照相比,两年内IR24和Asominori的糙米率、精米率和整精米率等加工品质都显著降低了,降低幅度分别为-3.14%~-0.21%和-3.14%~-0.33%;FACE对水稻粒长、粒宽以及粒形无显著影响;但与对照相比,IR24和Asominori的垩白米率却由对照下的29.63%和30.81%显著降低至18.93%和24.78%;FACE对两品种精米中直链淀粉含量无显著影响,但对RVA(RapidVis-cosity Analyzer)谱中各指标影响显著,其中FACE处理显著提高了两品种的最高粘度,而崩解值、消减值和糊化温度由于受到其它互作效应的影响两年的变化趋势不尽相同,蒸煮食味品质变化复杂;此外,IR24和Asominori的粗蛋白含量由对照下的11.77%和10.23%显著降低至10.97%和9.91%。两年内,IR24和Asominori除加工品质和食味品质表现趋势相同外,外观品质和蒸煮品质表现出籼稻IR24对CO2浓度升高的响应程度大于粳稻Asominori。展开更多
基金This study was supported by the Natural Science Foundation of Guangdong Province of China(Grant Nos.2018A030313465 and 2015B020231001)the National High-Tech Research and Development Program of China(Grant No.2014AA10A604-19)+1 种基金the National Natural Science Foundation of China(Grant No.31801448)the Special Fund for Scientific Innovation Strategy-Construction of High Level Academy of Agriculture Science(Grant No.R2018PY-QF003).
文摘We used a widely targeted metabolomics approach to examine the metabolic changes in three pedigreed indica cultivars(Meixiangzhan 2,Meisizhan and Qixinzhan),with different eating qualities,at 8,15 and 30 d after flowering(DAF)to explore the formation mechanism of rice eating and nutritional qualities at a global metabolic level.A total of 623 metabolites were identified,and results showed that metabolic variations among rice cultivars decreased with grain developmental stage,suggesting that sufficient carbohydrate and amino acid supply during grain development may contribute to excellent rice eating and nutritional quality formation.Lysophosphatidylcholines 19:0 and 16:1 were beneficial for excellent eating quality formation during grain development.Rice fragrance was attributed mainly to spermidine andγ-aminobutyric acid.Rice cultivars with excellent eating quality at 15-30 DAF had relatively higher flavone content,possibly because they had adequate carbohydrate and amino acid contents during grain development.These results provided insight into the mechanisms for establishing rice eating and nutritional qualities during grain formation at a global metabolic level,and can be applied towards improving rice quality.
文摘了解大气CO2浓度升高对粳稻和籼稻稻米品质的影响,为今后合理筛选育种材料提供依据。以粳稻Asominori与籼稻IR24为材料,田间试验,于2003年和2004年连续2年在FACE(Free Air CO2 Enrichment,大气CO2浓度增加200μmol/mol)和正常大气CO2浓度(约370μmol/mol)下,分析了稻米的加工品质、外观品质和蒸煮食味品质。与对照相比,两年内IR24和Asominori的糙米率、精米率和整精米率等加工品质都显著降低了,降低幅度分别为-3.14%~-0.21%和-3.14%~-0.33%;FACE对水稻粒长、粒宽以及粒形无显著影响;但与对照相比,IR24和Asominori的垩白米率却由对照下的29.63%和30.81%显著降低至18.93%和24.78%;FACE对两品种精米中直链淀粉含量无显著影响,但对RVA(RapidVis-cosity Analyzer)谱中各指标影响显著,其中FACE处理显著提高了两品种的最高粘度,而崩解值、消减值和糊化温度由于受到其它互作效应的影响两年的变化趋势不尽相同,蒸煮食味品质变化复杂;此外,IR24和Asominori的粗蛋白含量由对照下的11.77%和10.23%显著降低至10.97%和9.91%。两年内,IR24和Asominori除加工品质和食味品质表现趋势相同外,外观品质和蒸煮品质表现出籼稻IR24对CO2浓度升高的响应程度大于粳稻Asominori。