Effect of Photoperiod on Microalgae Haematococcus pluvialis Astaxanthin Accumulation in the Green Alga Haematococcus pluvialis: Effects of Cultivation Parameters The Relationship Between Characteristics of Yielding Carotenoid and Expression of Carotenogenic Genes in Phaffia rhodozyma Study on the Optimization of Haematococcus pluvialis Wall Broken and Extraction of Astaxanthin by SEM and RSM Genetic Transformation and Expressing of Astaxanthin Biosynthesis Genes bkt into‘Brookfield Gala’Apple Tree The Effects of Temperature on the Biomass and the Astaxanthin Output of Haematococcus pluvialis Comparative studies on the growth of Haematococcus pluvialis in different culture medium Astaxanthin Research Trends: Bibliometrical Analysis of the International Studies of Astaxanthin