AUTHOR=Madnay Mahmoud M. Y. , Obaid Wael A. , Selim Samy , Mohamed Reyad Ahmed , Alsherif Emad A. , Korany Shereen Magdy , Abdel-Mawgoud Mohamed , AbdElgawad Hamada 

TITLE=Rhodospirillum sp. JY3: An innovative tool to mitigate the phytotoxic impact of galaxolide on wheat (Triticum aestivum) and faba bean (Vicia faba) plants

JOURNAL=Frontiers in Plant Science

VOLUME=Volume 13 - 2022

YEAR=2022

URL=https://www.frontiersin.org/journals/plant-science/articles/10.3389/fpls.2022.1037474

DOI=10.3389/fpls.2022.1037474

ISSN=1664-462X

ABSTRACT=To date, several studies have considered the phytotoxic impact of cosmetics and personal care products on crop plants. Nonetheless, data are scarce about the toxic impact of galaxolide (HHCB) on the plant growth, physiology, and biochemistry of plants from different functional groups. To this end, HHCB impact on biomass, photosynthetic efficiency, antioxidant, and detoxification metabolism of grass (wheat) and legume (faba beans) plants have been investigated. On the other hand, plant growth-promoting bacteria (PGPB) can be effectively applied to reduce HHCB phytotoxicity. HHCB significantly reduced the biomass accumulation and the photosynthetic machinery of both crops, but to more extent for wheat. This growth reduction was concomitant with induced oxidative damage and decreased antioxidant defense system. To mitigate HHCB toxicity, a bioactive strain of diazotrophic plant growth promoting Rhodospirillum Sp. JY3 was isolated from heavy metal contaminated soil in Jazan, KSA and applies to both crops. Overall, Rhodospirillum mitigated HHCB-induced stress by differently modulating the oxidative burst (MDA, H2O2, and protein oxidation) in both wheat and faba beans. This alleviation was coincident with improvement in plant biomass and photosynthetic efficiency, particularly in wheat crops. Considering the antioxidant defense system, Rhodospirillum augmented the antioxidants in both wheat and faba beans and the detoxification metabolism under HHCB stress conditions. Moreover, this study advanced our understanding of the physiological and biochemical mechanism underlying HHCB stress and mitigating impact of Rhodospirillum sp. which may strikingly reduce the environmental risks on agriculture sustainability.