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1.
Physiological responses of garden cress (L. sativum) to different types of microplastics
Sara Pignattelli, Andrea Broccoli, Monia Renzi, 2020, izvirni znanstveni članek

Opis: In this study, for the first time, acute and chronic toxicity caused by four different kinds of microplastics: polypropylene (PP), polyethylene (PE), polyvinylchloride (PVC), and a commercial mixture (PE + PVC) on Lepidium sativum were evaluated. Parameters considered were: i) biometric parameters (e.g. percentage inhibition of seed germination, plant height, leaf number and fresh biomass productions); and ii) oxidative stress (e.g. levels of hydrogen peroxide, glutathione, and ascorbic acid). On plants exposed to chronic stress chlorophylls, carotenoids, aminolaevulinic acid, and proline productions were, also, evaluated. PVC resulted the most toxic than other plastic materials tested. This study represents the first paper highlighting microplastics are able to produce oxidative burst in tested plants and could represent an important starting point for future researches on biochemical effects of microplastic in terrestrial environments such as agroecosystems.
Najdeno v: osebi
Ključne besede: Polypropylene Polyethylene Polyvinylchloride Plastic packaging Microplastics Plant exposure
Objavljeno: 24.04.2020; Ogledov: 775; Prenosov: 0
.pdf Polno besedilo (5,55 MB)

2.
Short-term physiological and biometrical responses of Lepidium sativum seedlings exposed to PET-made microplastics and acid rain
Serena Felline, Antonio Terlizzi, Manuela Piccardo, Andrea Broccoli, Sara Pignattelli, Monia Renzi, 2021, izvirni znanstveni članek

Opis: Plastics enter in terrestrial natural system primarily by agricultural purposes, while acid rain is the result of anthropogenic activities. The synergistic effects of microplastics and acid rain on plant growth are not known. In this study, different sizes of polyethylene terephthalate (PET) and acid rain are tested on Lepidium sativum, in two separate experimental sets. In the first one we treated plants only with PET, in the second one we used PET and acid rain together. In both experimentations we analyzed: i) plant biometrical parameters (shoot height, leaf number, percentage inhibition of seed germination, fresh biomass), and ii) oxidative stress responses (hydrogen peroxide; ascorbic acid and glutathione). Results carried out from our experiments highlighted that different sizes of polyethylene terephthalate are able to affect plant growth and physiological responses, with or without acid rain supplied during acute toxicity (6 days). Short description: This study showed that different sizes of PET microplastics affect physiological and biometrical responses of Lepidum sativum seedlings, with or without acid rain; roots and leaves responded differently
Najdeno v: osebi
Ključne besede: Polyethylene terephthalate Acid rain Oxidative stress Biometrical response Lepidium sativum
Objavljeno: 16.12.2020; Ogledov: 437; Prenosov: 0
.pdf Polno besedilo (1,14 MB)

3.
Effects of polyethylene terephthalate (PET) microplastics and acid rain on physiology and growth of Lepidium sativum
Monia Renzi, Sara Pignattelli, Andrea Broccoli, Manuela Piccardo, Antonio Terlizzi, 2021, izvirni znanstveni članek

Opis: This study evaluated the chronic toxicity (30 days) of different sizes of polyethylene terephthalate (PET) microplastics (60e3000 mm) provided alone or in combination with acid rain, on garden cress (Lepidium sativum). Both biometrical and physiological traits have been evaluated: i) percentage inhibition of seed germination, plant height, leaf number and fresh biomass production; ii) oxidative stress responses (hydrogen peroxide; ascorbic acid and glutathione production); iii) impairment in photosynthetic machinery in term of pigments production; iv) aminolevulinic acid and proline production. Results highlighted that different sizes of PET, alone or in combination with acid rain, are able to negatively affect both biometrical and physiological plant traits. In particular, the lower size of microplastics is able to negatively affect growth and development, as well as to trigger the oxidative burst. Regarding the pigments production, PET coupled with acid rain, induced a higher production of Chl-b, and an inhibition of aminolevulinic acid.
Najdeno v: osebi
Ključne besede: polyethylene terephthalate, acid rain, lepidium sativum, oxidative burst, germinability, chlorophylls
Objavljeno: 02.04.2021; Ogledov: 145; Prenosov: 0
.pdf Polno besedilo (688,72 KB)

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