干旱区生态环境知识资源中心(Arid): Effects of exogenous auxin on yield in foxtail millet (Setaria italica L.) when applied at the grain-filling stage

Arid

DOI	10.3389/fpls.2022.1019152
	Effects of exogenous auxin on yield in foxtail millet (Setaria italica L.) when applied at the grain-filling stage
	Feng, Zhiwei; Zhao, Jing; Nie, Mengen; Qu, Fei; Li, Xin; Wang, Juanling
通讯作者	Li, X ; Wang, JL
来源期刊	FRONTIERS IN PLANT SCIENCE
ISSN	1664-462X
出版年	2023
卷号	13
英文摘要	Foxtail millet (Setaria italica L.) is of high nutritious value, which is an important crop in arid and semi-arid regions. The objective of this experiment was to explore the effects of the synthetic auxin naphthalene acetic acid (NAA) on the physiological processes of foxtail millet, and to provide a theoretical basis and technical approaches for its efficient use in millet cultivation. Two foxtail millet varieties ('Jingu 21' and 'Zhangzagu 5') were treated with six concentrations of NAA from 0-144 mg L-1 at the grain-filling stage in field experiments. The photosynthetic pigment contents, gas exchange parameters, chlorophyll fluorescence parameters, and grain yield were measured in foxtail millet. The results showed that low concentrations of NAA (18-36 mg L-1) increased the contents of photosynthetic pigments, and increased the activities of antioxidant enzymes, the photosynthetic rate, and the activity of photosystem system II (PS II). At higher NAA concentrations, the facilitation effect of the treatments diminished, showing a clear concentration effect. In this study, yield was significantly and positively correlated with PS II effective quantum yield (Y(II)) and the PSII electron transport rate (ETR), and the net photosynthetic rate (Pn) was significantly and positively correlated with chlorophyll content, stomatal conductance (Gs), Y(II), and ETR. These results also indicated that exogenous NAA application promotes the production of ATP and NADPH by increasing the efficiency of electron transfer within the photosystems and also improved photochemical utilization, which facilitates the fixation and reduction of carbon, ultimately leading to an increase in Pn and increasing grain yield in foxtail millet.
英文关键词	foxtail millet NAA yield photosynthesis physiological characteristics
类型	Article
语种	英语
开放获取类型	Green Published, gold
收录类别	SCI-E
WOS记录号	WOS:000913989100001
WOS关键词	PHOTOSYNTHESIS ; TOLERANCE ; ACID ; STRESS ; MAIZE ; RICE
WOS类目	Plant Sciences
WOS研究方向	Plant Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/396577
推荐引用方式 GB/T 7714	Feng, Zhiwei,Zhao, Jing,Nie, Mengen,et al. Effects of exogenous auxin on yield in foxtail millet (Setaria italica L.) when applied at the grain-filling stage[J],2023,13.
APA	Feng, Zhiwei,Zhao, Jing,Nie, Mengen,Qu, Fei,Li, Xin,&Wang, Juanling.(2023).Effects of exogenous auxin on yield in foxtail millet (Setaria italica L.) when applied at the grain-filling stage.FRONTIERS IN PLANT SCIENCE,13.
MLA	Feng, Zhiwei,et al."Effects of exogenous auxin on yield in foxtail millet (Setaria italica L.) when applied at the grain-filling stage".FRONTIERS IN PLANT SCIENCE 13(2023).