XU Jiahui1, 2, 3, ZHAO Xiaoting1, 2, MAO Kaitao1, 2, WANG Guodong4, TAN Weiming3*, SHU Kai1, 2*
(1 Research & Development Institute of Northwestern Polytechnical University in Shenzhen, Shenzhen 518057, Guangdong, China; 2 School of Ecology and Environment, Northwestern Polytechnical University, Xi′an 710129, Shaanxi, China; 3 College of Agronomy and Biotechnology, China Agricultural University, Beijing 100093, China; 4 School of Life Sciences, Shaanxi Normal University, Xi′an 710119, Shaanxi, China)
Abstract:
Under the influence of complex global climate change and industrial globalization, plants with fixed growth characteristics face the threats of diverse abiotic stresses. The successful germination of seeds under various abiotic stresses is of great important for plant reproduction, geographical distribution, crop yield and quality. With the development of plant molecular biology, significant progress has been achieved in the regulatory mechanisms of seed germination under abiotic stresses. In this review, the molecular mechanisms of regulating seed germination under salt stress, extreme temperature stress (high and low temperatures), drought stress, shade stress, osmotic stress and waterlogging stress were summarized in terms of phytohormone, reactive oxygen species (ROS) and energy metabolism pathways. The crosstalk network among these cascades and the potential research hotspots in this field were discussed,so as to elucidate the main modulators/gene functions in response to abiotic stresses during seed germination, and provide references for breeding design in agricultural production and environmental modification.
KeyWords:
abiotic stresses; seed germination; phytohormones; reactive oxygen species(ROS); energy metabolism; molecular function