*4.3. E*ff*ects of Simulated Environmental Factors on S.* × *hainanensis Seed Germination*

Seed germination is the weakest phase for plants to resist environmental stress. Furthermore, factors that adversely affect seed germination directly influence the generation and supplementation of new individual plants into the population, as well as its stability [39]. In this research, the major obstacles to the regeneration of *S.* × *hainanensis* populations were closely related to seed germination and indispensable environmental factors that influence germination.
