Amelioration of nitrate uptake under salt stress by ectomycorrhiza with and without a Hartig net

Amelioration of nitrate uptake under salt stress by ectomycorrhiza with and without a Hartig net

© 2019 The Authors. New Phytologist © 2019 New Phytologist Trust.

Bibliographische Detailangaben
Veröffentlicht in:The New phytologist. - 1979. - 222(2019), 4 vom: 12. Juni, Seite 1951-1964
1. Verfasser: Sa, Gang (VerfasserIn)
Weitere Verfasser: Yao, Jun, Deng, Chen, Liu, Jian, Zhang, Yinan, Zhu, Zhimei, Zhang, Yuhong, Ma, Xujun, Zhao, Rui, Lin, Shanzhi, Lu, Cunfu, Polle, Andrea, Chen, Shaoliang
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2019
Zugriff auf das übergeordnete Werk:The New phytologist
Schlagworte:Journal Article Research Support, Non-U.S. Gov't Paxillus involutus MAJ NAU NO3− flux NRTs NaCl Poplar pH mehr... Membrane Transport Proteins Nitrates Vanadates 3WHH0066W5 Sodium Chloride 451W47IQ8X Nitrite Reductases EC 1.7.- Nitrate Reductase EC 1.7.99.4 Proton-Translocating ATPases EC 3.6.3.14
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264 1 |c 2019 
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500 |a Date Completed 27.02.2020 
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500 |a Citation Status MEDLINE 
520 |a © 2019 The Authors. New Phytologist © 2019 New Phytologist Trust. 
520 |a Salt stress is an important environmental cue impeding poplar nitrogen nutrition. Here, we characterized the impact of salinity on proton-driven nitrate fluxes in ectomycorrhizal roots and the importance of a Hartig net for nitrate uptake. We employed two Paxillus involutus strains for root colonization: MAJ, which forms typical ectomycorrhizal structures (mantle and Hartig net), and NAU, colonizing roots with a thin, loose hyphal sheath. Fungus-colonized and noncolonized Populus × canescens were exposed to sodium chloride and used to measure root surface pH, nitrate (NO3- ) flux and transcription of NO3- transporters (NRTs; PcNRT1.1, -1.2, -2.1), and plasmalemma proton ATPases (HAs; PcHA4, -8, -11). Paxillus colonization enhanced root NO3- uptake, decreased surface pH, and stimulated NRTs and HA4 of the host regardless the presence or absence of a Hartig net. Under salt stress, noncolonized roots exhibited strong net NO3- efflux, whereas beneficial effects of fungal colonization on surface pH and HAs prevented NO3- loss. Inhibition of HAs abolished NO3- influx under all conditions. We found that stimulation of HAs was crucial for the beneficial influence of ectomycorrhiza on NO3- uptake, whereas the presence of a Hartig net was not required for improved NO3- translocation. Mycorrhizas may contribute to host adaptation to salt-affected environments by keeping up NO3- nutrition 
650 4 |a Journal Article 
650 4 |a Research Support, Non-U.S. Gov't 
650 4 |a Paxillus involutus 
650 4 |a MAJ 
650 4 |a NAU 
650 4 |a NO3− flux 
650 4 |a NRTs 
650 4 |a NaCl 
650 4 |a Poplar 
650 4 |a pH 
650 7 |a Membrane Transport Proteins  |2 NLM 
650 7 |a Nitrates  |2 NLM 
650 7 |a Vanadates  |2 NLM 
650 7 |a 3WHH0066W5  |2 NLM 
650 7 |a Sodium Chloride  |2 NLM 
650 7 |a 451W47IQ8X  |2 NLM 
650 7 |a Nitrite Reductases  |2 NLM 
650 7 |a EC 1.7.-  |2 NLM 
650 7 |a Nitrate Reductase  |2 NLM 
650 7 |a EC 1.7.99.4  |2 NLM 
650 7 |a Proton-Translocating ATPases  |2 NLM 
650 7 |a EC 3.6.3.14  |2 NLM 
700 1 |a Yao, Jun  |e verfasserin  |4 aut 
700 1 |a Deng, Chen  |e verfasserin  |4 aut 
700 1 |a Liu, Jian  |e verfasserin  |4 aut 
700 1 |a Zhang, Yinan  |e verfasserin  |4 aut 
700 1 |a Zhu, Zhimei  |e verfasserin  |4 aut 
700 1 |a Zhang, Yuhong  |e verfasserin  |4 aut 
700 1 |a Ma, Xujun  |e verfasserin  |4 aut 
700 1 |a Zhao, Rui  |e verfasserin  |4 aut 
700 1 |a Lin, Shanzhi  |e verfasserin  |4 aut 
700 1 |a Lu, Cunfu  |e verfasserin  |4 aut 
700 1 |a Polle, Andrea  |e verfasserin  |4 aut 
700 1 |a Chen, Shaoliang  |e verfasserin  |4 aut 
773 0 8 |i Enthalten in  |t The New phytologist  |d 1979  |g 222(2019), 4 vom: 12. Juni, Seite 1951-1964  |w (DE-627)NLM09818248X  |x 1469-8137  |7 nnns 
773 1 8 |g volume:222  |g year:2019  |g number:4  |g day:12  |g month:06  |g pages:1951-1964 
856 4 0 |u http://dx.doi.org/10.1111/nph.15740  |3 Volltext 
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