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Updated: Feb 3, 2026

Lateral Root Inducible System in Arabidopsis and Maize
Published on: January 14, 2016
The mycorrhiza-induced maize ZmPt9 gene affects root development and phosphate availability in nonmycorrhizal plant
Yunjian Xu1, Fang Liu1, Xiaoyu Li1
1a National Engineering Laboratory of Crop Stress Resistance Breeding , Anhui Agricultural University , Hefei , China.
Abstract:
The arbuscular mycorrhizal (AM)-induced ZmPt9 gene is an orthologous to some AM-inducible phosphate (Pi) transporter genes involved in Pi-starvation responses. Promoter GFP assay confirmed its transcript was localized surrounding arbuscule in arbuscule-containing cells. But this gene was not an AM fungi-specific gene. Its function in nonmycorrhizal seedlings was verified through phenotypic analysis of ZmPt9-overexpression Arabidopsis. Overexpression of ZmPt9 in Arabidopsis exhibited increased primary root length and lateral root formation. Furthermore, ZmPt9-overexpression Arabidopsis plants contained more phosphorus (P) than that of wild type. The affection of ZmPt9 in nonmycorrhizal Arabidopsis leads to the hypothesis that symbiosis-inducible genes are also involved in root development and Pi accumulation in AM-independent manner.
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