Pre- and Post-silking Carbohydrate Concentrations in Maize Ear-leaves and Developing Ears in Response to Nitrogen Availability

doi:10.2135/cropsci2016.03.0183

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	Pre- and Post-silking Carbohydrate Concentrations in Maize Ear-leaves and Developing Ears in Response to Nitrogen Availability
	Peng, Yunfeng 4; Zeng, Xieting 3; Houx, James H., III ; Boardman, Dara L.; Li, Chunjian 2; Fritschi, Felix B.
刊名	CROP SCIENCE
	2016
卷号	56 期号:6 页码:3218-3227
ISSN号	0011-183X
DOI	10.2135/cropsci2016.03.0183
文献子类	Article
英文摘要	Maize (Zea mays L.) grain yield is considered to be highly associated with carbohydrate dynamics in leaves and developing ears during the critical period bracketing silking. Carbohydrate changes are sensitive to variation in nitrogen (N) availability, yet a comprehensive analysis of the N effect on various carbohydrate concentrations around silking remains elusive. A 2-yr field study was conducted to investigate grain yield, N uptake, ear dry matter and carbohydrate concentrations in ear-leaves and whole ears (prior to silking) and kernels (after silking) of maize grown with 0, 150, and 300 kg N ha(-1). Greater N availability increased maize shoot dry matter and N content at silking and physiological maturity, as well as grain yield. While N had little effect on ear-leaf glucose concentration, sucrose concentration increased but starch concentration decreased with increasing N, regardless of sampling time. Prior to silking, glucose and fructose concentrations in the developing ear responded positively to increasing N availability, but sucrose and starch concentrations declined. In growing kernels shortly after silking, glucose and fructose concentrations in N fertilized treatments were significantly lower than those in the zero-N treatment. In contrast, a significant increase in kernel starch concentration was found in response to 300 kg N ha(-1). These observations point to an important role of the carbohydrate composition of unpollinated ears prior to silking with regard to kernel set and post-silking kernel starch accumulation, and thus final crop yield.
学科主题	Agronomy
电子版国际标准刊号	1435-0653
出版地	MADISON
WOS关键词	ZEA-MAYS-L ; KERNEL NUMBER DETERMINATION ; AMINO-ACID-METABOLISM ; LEAF PHOTOSYNTHESIS ; GRAIN-YIELD ; GROWTH ; SUCROSE ; HYBRIDS ; PLANT ; SENESCENCE
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
语种	英语
出版者	CROP SCIENCE SOC AMER
WOS记录号	WOS:000388510200033
资助机构	China Scholarship CouncilChina Scholarship Council
内容类型	期刊论文
源URL	[http://ir.ibcas.ac.cn/handle/2S10CLM1/25136]
专题	植被与环境变化国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China 2.Chinese Acad Agr Engn, Inst Protected Agr, Beijing 100125, Peoples R China 3.China Agr Univ, Ctr Resources Environm & Food Secur, Minist Educ, Key Lab Plant Soil Interact, Beijing 100193, Peoples R China 4.Peng, Yunfeng; Houx, James H., III; Boardman, Dara L.; Fritschi, Felix B.] Univ Missouri, Div Plant Sci, 1-31 Agr Bldg, Columbia, MO 65211 USA
推荐引用方式 GB/T 7714	Peng, Yunfeng,Zeng, Xieting,Houx, James H., III,et al. Pre- and Post-silking Carbohydrate Concentrations in Maize Ear-leaves and Developing Ears in Response to Nitrogen Availability[J]. CROP SCIENCE,2016,56(6):3218-3227.
APA	Peng, Yunfeng,Zeng, Xieting,Houx, James H., III,Boardman, Dara L.,Li, Chunjian,&Fritschi, Felix B..(2016).Pre- and Post-silking Carbohydrate Concentrations in Maize Ear-leaves and Developing Ears in Response to Nitrogen Availability.CROP SCIENCE,56(6),3218-3227.
MLA	Peng, Yunfeng,et al."Pre- and Post-silking Carbohydrate Concentrations in Maize Ear-leaves and Developing Ears in Response to Nitrogen Availability".CROP SCIENCE 56.6(2016):3218-3227.