Abstract:

To explore the plant growth regulating activity of N-nitro-2,4,6-trifluoroaniline for rice and provide a basis for the practical application of N-nitro-2,4,6-trifluoroaniline, the effects of N-nitro-2,4,6-trifluoroaniline on rice germination parameters, root activity and morphological indexes of rice seedlings were investigated by paper germination method, Perti dish method and soilless cultivation method. The results showed that after presoaking seeds in the 2.5 mg/L N-nitro-2,4,6-trifluoroaniline, the viability of rice seeds was promoted, the activity of α-amylase was significantly enhanced, the germination rate, root length and stem length were all increased significantly. The length of main root and lateral root, root surface area of rice seedlings were promoted with the treatment of 2.5-5 mg/L N-nitro-2,4,6-trifluoroaniline. Root meristem was more active, and the activity of root system was enhanced. The lower concentration of N-nitro-2,4,6-trifluoroaniline promotes the growth and development of rice, thus N-nitro-2,4,6-trifluoroaniline compound has certain application prospects.

Key words: N-nitro-2,4,6-trifluoroaniline, rice, seed germination, root meristem