Characteristics of Starch synthesis,Yield and Quality Provide Insights into Rice-Tartary Buckwheat Utilization and Improvement  

作　　者：Kai LIAO Yan WANG Wujuan YU Chunyu WEI Chenggang LIANG 

机构地区：[1]Research Center of Buckwheat Industry Technology,Guizhou Normal University,Guiyang 550001,China

出　　处：《Agricultural Biotechnology》2020年第2期31-34,38,共5页农业生物技术（英文版）

基　　金：Supported by National Natural Science Foundation of China(31660366);Natural Science Foundation of Guizhou Province(QKH CG[2019]4336,QKH ZC[2019]2298,QKH LH[2017]7359,QKH PT[2017]5726)。

摘　　要：[Objectives] Rice-Tartary buckwheat is a special type of Tartary buckwheat with easy hulling thin shell.This study was conducted to characterize the carbohydrate metabolism,quality and yield and provide a basis for food processing and breeding of rice-Tartary buckwheat.[Methods]The local rice-Tartary buckwheat‘cv.Xiaomiqiao’(XMQ) was used to explore the characteristics of photosynthesis,starch synthesis enzyme activities,traits of yield and quality,as compared to Tartary buckwheat‘cv.Jinqiao 2’(JQ2).[Results]XMQ showed significantly lower values of net photosynthetic rate,ADPGase activity and starch synthase activity at one or more periods during grain filling than JQ2.The effective branch number and grain number per plant of XMQ were similar to that of JQ2 regardless of different years,but the 1 000-grain weight was significantly lighter that resulted in the significantly lower yield.XMQ accumulated similar contents of starch(amylose,amylopectin) and protein(glutelin,albumin,prolamin,globulin) to those of JQ2,but exhibited significantly lower flavonoid content.The values of peak viscosity and hot paste viscosity in XMQ were similar to those of JQ2,but the values of cool paste viscosity,breakdown and setback were significantly lower.In conclusion,XMQ showed low yield due to the insufficient of photosynthesis and starch synthesis.XMQ exhibited high nutritional quality as well as normal Tartary buckwheat and stored 18.88 mg/g of flavonoid,that might be consumed as daily diet.[Conclusions]The present results will provide a basis for utilization and improvement of rice-Tartary buckwheat.[Objectives] Rice-Tartary buckwheat is a special type of Tartary buckwheat with easy hulling thin shell. This study was conducted to characterize the carbohydrate metabolism,quality and yield and provide a basis for food processing and breeding of rice-Tartary buckwheat. [Methods]The local rice-Tartary buckwheat‘cv. Xiaomiqiao’( XMQ) was used to explore the characteristics of photosynthesis,starch synthesis enzyme activities,traits of yield and quality,as compared to Tartary buckwheat‘cv. Jinqiao 2’( JQ2). [Results]XMQ showed significantly lower values of net photosynthetic rate,ADPGase activity and starch synthase activity at one or more periods during grain filling than JQ2. The effective branch number and grain number per plant of XMQ were similar to that of JQ2 regardless of different years,but the 1 000-grain weight was significantly lighter that resulted in the significantly lower yield. XMQ accumulated similar contents of starch( amylose,amylopectin) and protein( glutelin,albumin,prolamin,globulin) to those of JQ2,but exhibited significantly lower flavonoid content. The values of peak viscosity and hot paste viscosity in XMQ were similar to those of JQ2,but the values of cool paste viscosity,breakdown and setback were significantly lower.In conclusion,XMQ showed low yield due to the insufficient of photosynthesis and starch synthesis. XMQ exhibited high nutritional quality as well as normal Tartary buckwheat and stored 18. 88 mg/g of flavonoid,that might be consumed as daily diet. [Conclusions]The present results will provide a basis for utilization and improvement of rice-Tartary buckwheat.

关 键 词：Net PHOTOSYNTHETIC rate Key ENZYMES activity STARCH PASTING viscosity Yield Quality 

分 类 号：S517[农业科学—作物学]