Effects of root exudates of clover (Trifolium repens) on PAH microbial degradation and dioxygenase. Effects of spermidine on proline metabolism, antioxidant enzyme activity and gene expression in white clover leaves under water stress The antioxidant enzyme activities and gene expression induced by spermidine in leaves of white clover Effects of Na+ on antioxidant defence and accumulation of osmoregulatory substances in white clover under water deficit stress Genetic diversity and phylogeny of rhizobia isolated from white clover in Sichuan Province Physiological responses of white clover by different leaf types associated with anti-oxidative enzyme protection and osmotic adjustment under drought stress Genetic diversity in white clover germplasm detected by SRAP markers