Author(s)

Mebeaselassie Andargie^1*, Luoye Li¹, Aiqing Feng², Jianxiong Li^1*

¹Key Laboratory of South China Agricultural Plant Molecular Analysis and Genetic Improvement, and Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China.
²Plant Protection Institute, Guangdong Academy of Agricultural Sciences, Guangzhou, China.

The fungus U. virens is the causal agent of rice false smut disease. The green fluorescent protein (GFP) was used to mark this fungus in order to visualize and analyze the colonization and infection processes in vivo. Using epifluorescence microscopy colonization and infection on rice roots were visualized in vivo. After inoculation for 2 to 15 d, it was observed that the conidia and their germ-tubes had penetrated into epidermis of young roots. The hyphae were found inside the root xylem 18 d after inoculation. Generally, the transformed fungus colonized the rhizosphere, the cortex as well as the vascular tissues with symptoms of root necrosis observed. The results of this work show that U. virens colonize not only rice panicles but also the roots.

Endophytes, Plant-Fungal Interactions, Rhizosphere, Root Colonization, Ustilaginoidea virens

Andargie, M. , Li, L. , Feng, A. and Li, J. (2015) Colonization of Rice Roots by a Green Fluorescent Protein-Tagged Isolate of Ustilaginoidea virens. American Journal of Plant Sciences, 6, 2272-2279. doi: 10.4236/ajps.2015.614230.