Siberian wildrye seed yield limited by assimilate source

doi:10.1016/j.fcr.2017.12.022

	Siberian wildrye seed yield limited by assimilate source
	Wang, Mingya ; Hou, Longyu 1; Zhu, Yanqiao ; Zhang, Qiang ; Wang, Hui ; Xia, Fangshan 2; Chen, Lingling ; Mao, Peisheng ; Hannaway, David B.
	2018
发表期刊	FIELD CROPS RESEARCH
ISSN	0378-4290
卷号	218 页码:18-23
摘要	Siberian wildrye (Elymus sibiricus L.) is a cool-season, perennial bunchgrass widely used to increase forage production of semi-arid grasslands and to restore degraded lands. It is drought and cold tolerant, and has high yield potential and livestock acceptability. However, seed yield is low and variable and there is little information on the physiological processes limiting its seed yield. A split plot experiment was conducted to determine the effect of source-sink treatments under different nitrogen (N) applications on seed weight, seed setting rate, and dry matter and N remobilization during three successive growing seasons. The main plots were N level (0, 90, 180 kg N ha(-1)) and sub plots were source sink treatments (half trimmed and unaltered spikes). Leaf, stem, and spike dry weights and N concentration were measured at anthesis and seed physiological maturity, while seed weight and seed setting rate were measured at seed physiological maturity and milk stage respectively. Stem and spike dry weights were increased, whereas leaf dry weight was decreased between anthesis and maturity. N application significantly increased all plant parts of Siberian wildrye dry weight and seed weight compared with 0 kg N ha(-1) application. The half-spike treatment increased seed weight and seed setting rate across all N levels, and stem dry weight accumulation, but there was no significant influence on N translocation. The results of this study indicate that Siberian wildrye seed yield is source limited since seed weight and seed setting rate were increased in the half-spike treatment with N application. Stem dry weight increased after anthesis suggesting that stems were sinks and competed for assimilates with spikes. Therefore, breeding for increased photosynthesis and partitioning of assimilates from stems to spikes may result in increased and more consistent seed yield.
关键词	Siberian wildrye Half-spike Source-sink Seed weight Seed yield Dry matter N
学科领域	Agronomy
DOI	10.1016/j.fcr.2017.12.022
收录类别	SCI
语种	英语
WOS关键词	SOURCE-SINK RELATIONS ; LOLIUM-PERENNE L ; DRY-MATTER ; ELYMUS-SIBIRICUS ; P FERTILIZATION ; USE EFFICIENCY ; GRAIN WEIGHT ; NITROGEN ; WHEAT ; BARLEY
WOS记录号	WOS:000427208600003
出版者	ELSEVIER SCIENCE BV
文献子类	Article
出版地	AMSTERDAM
EISSN	1872-6852
资助机构	fund for the China Agriculture Research System [CARS-35] ; fund for Beijing Common Construction Project ; National Key Technologies R&D Program of the 12th Five-Year Plan [2011BAD17801-02]
作者邮箱	maops@cau.edu.cn
引用统计	被引频次：9[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ibcas.ac.cn/handle/2S10CLM1/20644
专题	植被与环境变化国家重点实验室
作者单位	1.China Agr Univ, Forage Seed Lab, Beijing Key Lab Grassland Sci, Beijing 100193, Peoples R China 2.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China 3.Shanxi Agr Univ, Coll Anim Sci & Vet Med, Taigu 030801, Shanxi, Peoples R China 4.Hannaway, David B.] Oregon State Univ, Dept Crop & Soil Sci, Corvallis, OR 97331 USA
推荐引用方式 GB/T 7714	Wang, Mingya,Hou, Longyu,Zhu, Yanqiao,et al. Siberian wildrye seed yield limited by assimilate source[J]. FIELD CROPS RESEARCH,2018,218:18-23.
APA	Wang, Mingya.,Hou, Longyu.,Zhu, Yanqiao.,Zhang, Qiang.,Wang, Hui.,...&Hannaway, David B..(2018).Siberian wildrye seed yield limited by assimilate source.FIELD CROPS RESEARCH,218,18-23.
MLA	Wang, Mingya,et al."Siberian wildrye seed yield limited by assimilate source".FIELD CROPS RESEARCH 218(2018):18-23.

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