干旱区生态环境知识资源中心(Arid): Grazing intensity changed the activities of nitrogen assimilation related enzymes in desert Steppe Plants

Arid

DOI	10.1186/s12870-021-03205-0
	Grazing intensity changed the activities of nitrogen assimilation related enzymes in desert Steppe Plants
	Zhu, Aimin; Liu, Haili; Wang, Yuehua; Sun, Hailian; Han, Guodong
通讯作者	Han, GD (corresponding author), Inner Mongolia Agr Univ, Coll Grassland Resources & Environm, Key Lab Grassland Resources,Minist Educ Chian, Key Lab Forage Cultivat,Proc & Higher Efficient U, Hohhot 010019, Peoples R China.
来源期刊	BMC PLANT BIOLOGY
ISSN	1471-2229
出版年	2021
卷号	21 期号:1
英文摘要	Background Nitrogen, as a limiting factor for net primary productivity in grassland ecosystems, is an important link in material cycles in grassland ecosystems. However, the nitrogen assimilation efficiency and mechanisms of grassland plants under grazing disturbance are still unclear. This study investigated Stipa breviflora desert steppe which had been grazed for 17 years and sampled the root system and leaf of the constructive species Stipa breviflora during the peak growing season under no grazing, light grazing, moderate grazing and heavy grazing treatments. The activities of enzymes related to nitrogen assimilation in roots and leaves were measured. Results Compared with no grazing, light grazing and moderate grazing significantly increased the activities of nitrate reductase (NR), glutamine synthetase (GS), glutamic oxaloacetic transaminase (GOT) and glutamic pyruvate transaminase (GPT) in leaves, and GS, GOT and GPT in roots of Stipa breviflora, while heavy grazing significantly decreased the activities of GS in leaves and NR in roots of Stipa breviflora. NR, GOT and GPT activities in leaves and roots of Stipa breviflora were positively correlated with nitrogen content, soluble protein, free amino acid and nitrate content. Conclusions Grazing disturbance changed the activities of nitrogen assimilation related enzymes of grassland plants, and emphasized that light grazing and moderate grazing were beneficial for nitrogen assimilation by grassland plants. Therefore, establishing appropriate stocking rates is of great significance for material flows in this grassland ecosystem and for the stability and sustainable utilization of grassland resources.
英文关键词	Grazing Stipa breviflora Nitrogen assimilation Enzyme activity
类型	Article
语种	英语
开放获取类型	Green Submitted, Green Published, gold
收录类别	SCI-E
WOS记录号	WOS:000700751700001
WOS关键词	GLUTAMINE-SYNTHETASE ; ORGANIC NITROGEN ; SOIL ; MAIZE ; METABOLISM ; GRASSLANDS ; RESPONSES ; QUALITY ; STRESS ; L.
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/2XILL650/362724
作者单位	[Zhu, Aimin; Liu, Haili; Wang, Yuehua; Han, Guodong] Inner Mongolia Agr Univ, Coll Grassland Resources & Environm, Key Lab Grassland Resources,Minist Educ Chian, Key Lab Forage Cultivat,Proc & Higher Efficient U, Hohhot 010019, Peoples R China; [Sun, Hailian] Res Base Acad Agr & Anim Husb Inner Mongoloia, Hohhot 010031, Peoples R China
推荐引用方式 GB/T 7714	Zhu, Aimin,Liu, Haili,Wang, Yuehua,et al. Grazing intensity changed the activities of nitrogen assimilation related enzymes in desert Steppe Plants[J],2021,21(1).
APA	Zhu, Aimin,Liu, Haili,Wang, Yuehua,Sun, Hailian,&Han, Guodong.(2021).Grazing intensity changed the activities of nitrogen assimilation related enzymes in desert Steppe Plants.BMC PLANT BIOLOGY,21(1).
MLA	Zhu, Aimin,et al."Grazing intensity changed the activities of nitrogen assimilation related enzymes in desert Steppe Plants".BMC PLANT BIOLOGY 21.1(2021).