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Abstract

The present invention discloses a pre-stress treatment method for reducing a mortality rate of Haematococcus pluvialis. The method includes the following steps: after the Haematococcus pluvialis is subjected to a logarithmic-growth amplification stage to reach a specific biomass and before the Haematococcus pluvialls enters into an accumulation stage of astaxanthin, performing prestress treatment on the Haematococcus pluvialis, where the prestress treatment indicates adjusting a culture system to include characteristic peaks with wavelength ranges of 430-490 nm and 620-700 nm as spectra parameters. In the present invention, ecological factors in the culture system of the haematococcus pluvialis are adjusted, so that more than 90% of cells therein can detach from flagella in a short time, the walls of the cells are thickened, the cells enter into an ideal immobile cell state in which the astaxanthin can be accumulated, and the mortality rate of the cells is less than 3%, so as to reduce the mortality rate of the cells at an initial stage in which the Haematococcus pluvialis stresses to accumulate the astaxanthin. This reduces the generation of organic matters in an algal liquid, and realizes the purpose of reducing pollution, shortens the accumulation period of the astaxanthin in the Haematococcus pluvialis, and improve the productivity, the quality and yield of the product and the production stability.

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First Claim