干旱区生态环境知识资源中心(Arid): Arbuscular Mycorrhizal Fungi Confer Salt Tolerance in Giant Reed (Arundo donax L.) Plants Grown Under Low Phosphorus by Reducing Leaf Na+ Concentration and Improving Phosphorus Use Efficiency

Arid

DOI	10.3389/fpls.2019.00843
	Arbuscular Mycorrhizal Fungi Confer Salt Tolerance in Giant Reed (Arundo donax L.) Plants Grown Under Low Phosphorus by Reducing Leaf Na+ Concentration and Improving Phosphorus Use Efficiency
	Romero-Munar, Antonia 1; Baraza, Elena 2; Gulias, Javier 2; Cabot, Catalina 1
通讯作者	Romero-Munar, Antonia
来源期刊	FRONTIERS IN PLANT SCIENCE
ISSN	1664-462X
出版年	2019
卷号	10
英文摘要	Salinization is one of the major causes of agricultural soil degradation worldwide. In arid and semi-arid regions with calcareous soils, phosphorus (P) deficiency further worsens the quality of salinized soils. Nonetheless, nutrient poor soils could be suitable of producing second-generation energy crops. Due to its high biomass production, Arundo donax L. (giant reed) is one of the most promising species for energy and second-generation biofuel production. A. donax can be propagated by micropropagation, an in vitro technique that produces high number of homogeneous plantlets. However, crop establishment is often compromised due to poor plantlet acclimatization to the soil environment. Arbuscular mycorrhizal fungi (AM) are components of soil-plant systems able to increase root phosphorus uptake and to confer the plant an increase tolerance to salinity with a consequent enhancement effect of plant growth and yield. In the present study, the relative importance of the early symbiosis establishment between AM fungi and A. donax micropropagated plantlets in the response to salt stress under low phosphorus availability was determined. A commercial inoculum which contained two different AM fungi species: Rhizophagus intraradices and Funneliformis mosseae was used. AM-symbionts (AM) and non-symbionts plants were grown at two phosphorus [2.5 mu M (C) and 0.5 mM (P)] and three NaCl (1, 75 and 150 mM) concentrations in a room chamber under controlled conditions. After 5 weeks, AM root colonization was 60, 26 and 15% in 1, 75 and 150 mM NaCl-treated plants, respectively. At 1 and 75 mM NaCl, AM plants showed increased growth. In all saline treatments, AM plants had decreased Na+ uptake, Na+ root-to-shoot translocation, Na+/K+ ratio and increased P and K use efficiencies with respect to C and P plants. AM improved the nutritional status of A. donax plants by enhancing nutrient use efficiency rather than nutrient uptake. Increased phosphorus use efficiency in AM plants could have benefited ion (Na+ and K+) uptake and/or allocation and ultimately ameliorate the plant's response to saline conditions.
英文关键词	early stage arbuscular mycorrhiza salinity tolerance phosphorus scarcity phosphorus use effieciency
类型	Article
语种	英语
国家	Spain
开放获取类型	gold, Green Published
收录类别	SCI-E
WOS记录号	WOS:000475858200001
WOS关键词	WATER RELATIONS ; PHOSPHATE TRANSPORTER ; MINERAL-NUTRITION ; NUTRIENT-UPTAKE ; SALINITY ; SOIL ; STRESS ; SYMBIOSIS ; RESPONSES ; BIOMASS
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/2XILL650/215829
作者单位	1.Univ Bakeric Isl, Fac Ciencies, Dept Biol, Res Grp Plant Biol Mediterranean Condit, Palma De Mallorca, Spain; 2.Inst Agroenvironm & Water Econ Res INAGEA, Palma De Mallorca, Spain
推荐引用方式 GB/T 7714	Romero-Munar, Antonia,Baraza, Elena,Gulias, Javier,et al. Arbuscular Mycorrhizal Fungi Confer Salt Tolerance in Giant Reed (Arundo donax L.) Plants Grown Under Low Phosphorus by Reducing Leaf Na+ Concentration and Improving Phosphorus Use Efficiency[J],2019,10.
APA	Romero-Munar, Antonia,Baraza, Elena,Gulias, Javier,&Cabot, Catalina.(2019).Arbuscular Mycorrhizal Fungi Confer Salt Tolerance in Giant Reed (Arundo donax L.) Plants Grown Under Low Phosphorus by Reducing Leaf Na+ Concentration and Improving Phosphorus Use Efficiency.FRONTIERS IN PLANT SCIENCE,10.
MLA	Romero-Munar, Antonia,et al."Arbuscular Mycorrhizal Fungi Confer Salt Tolerance in Giant Reed (Arundo donax L.) Plants Grown Under Low Phosphorus by Reducing Leaf Na+ Concentration and Improving Phosphorus Use Efficiency".FRONTIERS IN PLANT SCIENCE 10(2019).