title: Different effects of night versus day high temperature on rice quality and accumulation profiling of rice grain proteins during grain filling.
abstract: High temperature has adverse effects on rice yield and quality. The different influences of night high temperature (NHT) and day high temperature (DHT) on rice quality and seed protein accumulation profiles during grain filling in indica rice '9311' were studied in this research. The treatment temperatures of the control, NHT, and DHT were 28°C/20°C, 27°C/35°C, and 35°C/27°C, respectively, and all the treatments were maintained for 20 days. The result of rice quality analysis indicated that compared with DHT, NHT exerted less effect on head rice rate and chalkiness, whereas greater effect on grain weight. Moreover, the dynamic accumulation change profiles of 61 protein spots, differentially accumulated and successfully identified under NHT and DHT conditions, were performed by proteomic approach. The results also showed that the different suppressed extent of accumulation amount of cyPPDKB might result in different grain chalkiness between NHT and DHT. Most identified isoforms of proteins, such as PPDK and pullulanase, displayed different accumulation change patterns between NHT and DHT. In addition, compared with DHT, NHT resulted in the unique accumulation patterns of stress and defense proteins. Taken together, the mechanisms of seed protein accumulation profiles induced by NHT and DHT during grain filling should be different in rice, and the potential molecular basis is discussed in this study.
authors.affiliation: Crop Physiology and Production Center, Key Laboratory of Huazhong Crop Physiology, Ecology and Production, Ministry of Agriculture, Huazhong Agricultural University, Wuhan 430070, China.
authors.forename: Haixia
authors.initials: H
authors.lastname: Li
authors.forename: Zhen
authors.initials: Z
authors.lastname: Chen
authors.forename: Meixia
authors.initials: M
authors.lastname: Hu
authors.forename: Zhenmei
authors.initials: Z
authors.lastname: Wang
authors.forename: Hua
authors.initials: H
authors.lastname: Hua
authors.forename: Changxi
authors.initials: C
authors.lastname: Yin
authors.forename: Hanlai
authors.initials: H
authors.lastname: Zeng
mesh_terms: D050260:Carbohydrate Metabolism; D019295:Computational Biology; D015180:Electrophoresis, Gel, Two-Dimensional; D006026:Glycoside Hydrolases / Q000378:metabolism; D006358:Hot Temperature; D007527:Isoenzymes; D012275:Oryza / Q000201:enzymology / Q000254:growth & development / Q000502:physiology*; D010940:Plant Proteins / Q000032:analysis / Q000378:metabolism*; D011772:Pyruvate, Orthophosphate Dikinase / Q000378:metabolism; D012639:Seeds / Q000201:enzymology / Q000254:growth & development / Q000502:physiology*; D019032:Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization / Q000379:methods
chemical_list: D007527:Isoenzymes; D010940:Plant Proteins; D011772:Pyruvate, Orthophosphate Dikinase; D006026:Glycoside Hydrolases; C100181:pullulanase