Rapid nitrogen transfer in the Sorghum bicolor-Glomus mosseae arbuscular mycorrhizal symbiosis

被引：15

作者：

Koegel, Sally ^{[1
]}

Boller, Thomas ^{[1
]}

Lehmann, Moritz F. ^{[2
]}

Wiemken, Andres ^{[1
]}

Courty, Pierre-Emmanuel ^{[1
]}

机构：

[1] Univ Basel, Zurich Basel Plant Sci Ctr, Dept Environm Sci, Bot, Basel, Switzerland

[2] Univ Basel, Dept Environm Sci Environm Geosci & Biogeochem, Basel, Switzerland

来源：

PLANT SIGNALING & BEHAVIOR | 2013年 / 8卷 / 08期

基金：

瑞士国家科学基金会;

关键词：

nitrogen; mycelium; arbuscular mycorrhizal fungi; transfer; sorghum; N-15; labeling;

D O I：

10.4161/psb.25229

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

We have recently identified two genes coding for ammonium transporters (AMT) in Sorghum bicolor that were induced in roots colonized by arbuscular mycorrhizal (AM) fungi. To improve our understanding of the dynamics of ammonium transport in this symbiosis, we studied the transfer of soil-ammonium-derived N-15 to S. bicolor plants via the Glomus mosseae fungal mycelium in compartmented microcosms. The (NH4+)-N-15-containing hyphal compartment was inaccessible to the roots in the plant compartment. 15N label concentrations significantly increased in plant roots and leaves already 48 h after exposure of the AM fungus to the (NH4+)-N-15 substrate, attesting an efficient symbiotic N transfer between the symbiotic partners and further highlighting that AM symbiosis represents an important component of plant nitrogen nutrition.

引用

页数：3

共 8 条

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