Changes in the activities of starch metabolism enzymes in rice grains in response to elevated CO2 concentration

doi:10.1007/s00484-015-1068-9

	Changes in the activities of starch metabolism enzymes in rice grains in response to elevated CO2 concentration
	Xie, Li-Yong 1; Lin, Er-Da 2; Zhao, Hong-Liang 1; Feng, Yong-Xiang 3
刊名	INTERNATIONAL JOURNAL OF BIOMETEOROLOGY
	2016
卷号	60 期号:5 页码:727-736
关键词	FACE Rice Metabolic enzyme Enzyme activity ADPG pyrophosphorylase enzyme Starch synthesis enzyme Starch branching enzyme
ISSN号	0020-7128
DOI	10.1007/s00484-015-1068-9
通讯作者	Xie, Li-Yong
英文摘要	The global atmospheric CO2 concentration is currently (2012) 393.1 mu mol mol(-1), an increase of approximately 42 % over pre-industrial levels. In order to understand the responses of metabolic enzymes to elevated CO2 concentrations, an experiment was conducted using the Free Air CO2 Enrichment (FACE )system. Two conventional japonica rice varieties (Oryza sativa L. ssp. japonica) grown in North China, Songjing 9 and Daohuaxiang 2, were used in this study. The activities of ADPG pyrophosphorylase, soluble and granule-bound starch synthases, and soluble and granule-bound starch branching enzymes were measured in rice grains, and the effects of elevated CO2 on the amylose and protein contents of the grains were analyzed. The results showed that elevated CO2 levels significantly increased the activity of ADPG pyrophosphorylase at day 8, 24, and 40 after flower, with maximum increases of 56.67 % for Songjing 9 and 21.31 % for Daohuaxiang 2. Similarly, the activities of starch synthesis enzymes increased significantly from the day 24 after flower to the day 40 after flower, with maximum increases of 36.81 % for Songjing 9 and 66.67 % for Daohuaxiang 2 in soluble starch synthase (SSS), and 25.00 % for Songjing 9 and 36.44 % for Daohuaxiang 2 in granule-bound starch synthase (GBSS), respectively. The elevated CO2 concentration significantly increased the activity of soluble starch branching enzyme (SSBE) at day 16, 32, and 40 after flower, and also significantly increased the activity of granule-bound starch branching enzyme (GBSBE) at day 8, 32, and 40 after flower. The elevated CO2 concentration increased the peak values of enzyme activity, and the timing of the activity peaks for SSS and GBSBE were earlier in Songjing 9 than in Daohuaxiang 2. There were obvious differences in developmental stages between the two varieties of rice, which indicated that the elevated CO2 concentration increased enzyme activity expression and starch synthesis, affecting the final contents of starch and protein in the rice grains. Our results will provide a foundation for understanding the physiological mechanisms of rice yield under elevated atmospheric CO2 concentrations.
学科主题	Biophysics ; Environmental Sciences ; Meteorology & Atmospheric Sciences ; Physiology
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000374305900010
内容类型	期刊论文
源URL	[http://111.203.20.206/handle/2HMLN22E/19692]
专题	农业环境与可持续发展研究所
作者单位	1.Shenyang Agr Univ, Coll Agron, Shenyang 110161, Peoples R China 2.Chinese Acad Agr Sci, Inst Environm & Sustainable Dev Agr, Beijing 100081, Peoples R China 3.Heilongjiang Bayi Agr Univ, Coll Agron, Daqing 163319, Peoples R China
推荐引用方式 GB/T 7714	Xie, Li-Yong,Lin, Er-Da,Zhao, Hong-Liang,et al. Changes in the activities of starch metabolism enzymes in rice grains in response to elevated CO2 concentration[J]. INTERNATIONAL JOURNAL OF BIOMETEOROLOGY,2016,60(5):727-736.
APA	Xie, Li-Yong,Lin, Er-Da,Zhao, Hong-Liang,&Feng, Yong-Xiang.(2016).Changes in the activities of starch metabolism enzymes in rice grains in response to elevated CO2 concentration.INTERNATIONAL JOURNAL OF BIOMETEOROLOGY,60(5),727-736.
MLA	Xie, Li-Yong,et al."Changes in the activities of starch metabolism enzymes in rice grains in response to elevated CO2 concentration".INTERNATIONAL JOURNAL OF BIOMETEOROLOGY 60.5(2016):727-736.