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It takes two to tango

last modified May 30, 2017 01:32 PM

The NOPE1 gene is required for arbuscular mycorrhizal symbiosis in maize. The causal gene is now identified using rice. It is the first identified GlcNAc transporter in plants, needed for presymbiotic fungal reprogramming.

Nadal M, Sawers R, Naseem S, Bassin B, Kulicke C, Sharman A, An G, An K, Ahern KR, Romag A, Brutnell TP, Gutjahr C, Geldner N, Roux C, Martinoia E, Konopka JB, Paszkowski U. An N-acetylglucosamine transporter required for arbuscular mycorrhizal symbioses in rice and maize. Nature Plants.

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2017-05-30-large.jpg Click to enlarge

Hypothetical model of NOPE1 function. Fungal perception root-released strigolactones (SL) leads to increased hyphal branching and increased metabolic activity. The
steep SL gradient adjacent to the root navigates the fungus towards the root. In the absence of functional NOPE1 (A) fungal responses to SL are intact, however efficient physical interaction is compromised. In the presence of functional NOPE1 (B) availability of a bioactive molecule in the rhizosphere conditions the fungus for symbiosis.

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