Research On The Effects Of Phosphine On Germination Of Rice Seed

The soil is extremely important materials for human survival and development,phosphorus is one of the most important elements in the soil. As an reducing gas, phosphinecan easily be oxidized to phosphate, which can absorbed by plants. If all those phosphine cantransform to phosphate, it will improve the utilization of phosphorus in the soil, which isbeneficial for plants growth and absorption. Therefore, it is necessary to carry out in-depthstudy the effect of phosphine on plants.In this study, simulation experiments was conducted through the plant growth chamberwhich allowed the phosphine concentration maintained at certain concentrations (0ppm,1ppm,3ppm and5ppm10ppm) to analysis the effect of phosphine on rice seed germinationprocess, physiological and biochemical indicators, and then summarize the regular pattern ofthe trend of those indicators. Experimental content include the effect of phosphine on riceseed germination rate, germination potential, germination index, vigor index; Hydrogenperoxide enzyme (CAT), peroxidase (POD), superoxide dismutase (SOD) activity andmalondialdehyde (MDA) content, and the phosphorus content in seeds.The results show that:(1) phosphine can inhibited rice seed germination rate, germinationpotential, germination index, vigor index significantly, and with the increase of theconcentration of phosphine, inhibition strengthened;(2) with an increase of phosphineconcentration, the CAT activity significantly decreased, POD activity and SOD activityincreased at first and then reduced, the MDA content did not change significantly.(3) Riceseed can absorb phosphine, and with phosphine concentration increases, the amount ofphosphorus in seeds increased.