Research Progress on Relationship between Expansin and Plant Resistance

As a cell wall protein,expansin causes cell wall loosening and extension.The advancements of expansins support that expansins play an important role in physiological process of plant growth.Many studies suggested that expansin was involved in plant response to some biotic or abiotic stress,such as drought,salt and diseases.Under drought stress,the expression of expansin gene is related to drought resistance.Salt resistance is affected by expansin gene expression.Submergence induced elongation results from expansin accumulation.Cell wall loosening regulated by expansin provide a new way for plant disease resistance.