Effects of Plant Protein Hydrolysate on Emergence and Growth of Rice Seedlings

With the rise of organic agriculture, researches on the production of slow-release organic fertilizer from natural organic materials have attracted much attention. Plant protein and peptides have potential applications in agricultural production. The effects of bioactive peptides derived from plant protein on rice seed germination and seedling growth and development were systematically studied using bioassays and greenhouse growth experiments. The feasibility of phytoprotein peptide application in the rice seedling stage was discussed. The results showed that the phytoprotein peptides had no adverse effects on rice, and the application when applied to rice seedlings, phytoprotein peptides within a certain concentration range produced obvious promotion effects on the growth and development of rice seedlings, which were more pronounced in the underground part of the plants. Phytoprotein peptides increased root length and dry matter accumulation and improved the robustness of rice seedlings. A 40 g·mol;·L;dose of phytoprotein peptides increased root length, plant fresh weight, plant dry weight, root fresh weight and root dry weight by 59.24%, 20.14%, 26.32%, 51.57% and 81.70%, respectively compared to the control. In addition, the phytoprotein peptides significantly increased the chlorophyll content, root activity and nitrate reductase activity of rice seedlings, as well as superoxide dismutase, peroxidase, catalase and β-1, 3-glucanase activity in rice leaves, which could improve stress resistance. Plant peptides were simple to produce and costeffective. Reasonable development and excavation of plant protein and protein hydrolysate peptide in China’s agricultural application had a good practical basis and value significance.