Antioxidant systems responses and the compatible solutes as contributing factors to lead accumulation and tolerance in Lathyrus sativus inoculated by plant growth promoting rhizobacteria

It is concluded that antioxidant enzymes, carotenoids, soluble sugars and proline were involved in the main defense mechanism and tolerance of Lathyrus sativus to Pb oxidative stress, as well lead accumulation, and are likely to operate in combination.