☆ 4.5 Article

Arbuscular mycorrhizae increase but vermicompost decrease the sun protection factor (SPF) in leaves of Hymenaea martiana Hayne seedlings

RHIZOSPHERE (2023)

Journal

RHIZOSPHERE

Volume 27, Issue -, Pages -

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ELSEVIER

DOI: 10.1016/j.rhisph.2023.100781

Keywords

Fabaceae; Phenolic compounds; Photoprotective activity; Rhizosphere

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Abstract

This study found that selecting the appropriate combination of AMF strains and substrates can increase the photoprotective and antioxidant activities in Hymenaea martiana leaves. Vermicompost supplementation reduced these effects, but AMF colonization significantly increased photoprotective activity, possibly due to the increased concentration of proanthocyanidins. Inoculating with AMF can improve the quality of H. martiana plants and reduce the need for vermicompost.

This study aimed to select the most efficient combination of arbuscular mycorrhizal fungi (AMF) and substrate to increase the photoprotective and in vitro antioxidant activities in Hymenaea martiana Hayne leaves. Hymenaea martiana seedlings were grown in soil with or without 10% vermicompost and inoculated with three AMF species: Acaulospora longula, Gigaspora albida, and Claroideoglomus etunicatum. Seedlings grown in soil without vermicompost or AMF inoculation served as controls. After 148 days of growth in a greenhouse, the photoprotective and antioxidant activities, and the production of some phenolics in the leaves were evaluated. Vermicompost supplementation reduced the photoprotective and antioxidant effects in extracts compared to the control. However regardless of the vermicompost treatment, mycorrhizal colonization resulted in a 40% increase in photoprotective activity compared to control; this enhancement was correlated with the increased concentration of proanthocyanidins in mycorrhizal plants. AMF inoculation improves the quality of H. martiana phytomass, dispensing the application of vermicompost in the cultivation substrate. This is the first report on the potential of AMF and vermicompost to increase the sun protection factor in H. martiana leaves.

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Photoprotective responses of three intertidal Antarctic macroalgae to short-term temperature stress

Claudio A. Saez, Macarena Troncoso, Camilo Navarrete, Fernanda Rodriguez-Rojas, Nelso Navarro, Andres Trabal, Celine Lavergne, Diego Pardo, Murray T. Brown, Ivan Gomez, Felix L. Figueroa, Paula S. M. Celis-Pla

Summary: The Antarctic Peninsula is facing one of the highest warming rates globally. The potential role of photoprotective and antioxidant mechanisms in response to future increases in sea surface temperatures caused by climate change was investigated. Laboratory experiments using three intertidal macroalgae species showed that increasing water temperatures due to global warming can enhance the photoprotective abilities of these species, with each species showing specific responses.

FRONTIERS IN MARINE SCIENCE (2023)