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Exogenous trehalose alleviates the inhibitory effects of salt stress in strawberry plants

100%

Samadi S., Habibi G., Vaziri A.

Acta Physiologiae Plantarum

2019

tom 41

nr 07

We investigated the role of trehalose (Tre) root pretreatment (10 and 30 mM) in photosynthesis, phenolic metabolism, antioxidant properties and ion homeostasis of strawberry plants when exposed to 50-mM NaCl for 7 days. Salinity caused an adverse effect on the shoot dry weight, whereas root pretreatment with 30-mM Tre mitigated these inhibitory effects. Under no stress, development of flowers was greatly enhanced by the supply of Tre. Plants exposed to salt stress after root pretreatment with 30-mM Tre maintained their photosynthetic electron transport rate, compared with NaCl-alone-treated plants, contributing to the improvement of photosystem Performance Index (PIabs), and oxygen-evolving complex efficiency of PSII (Fv/Fo). Although NaCl stress resulted in the highest Na accumulation, the application of Tre reduced shoot Na accumulation. In addition, the oxidative burst and lipid peroxidation observed in plants subjected to salinity conditions was greatly mitigated after root pretreatment with 30-mM Tre, as evidenced by lower malondialdehyde and superoxide radical (O₂˙⁻) levels, compared with NaCl-alone-treated plants. To sum up, root pretreatments with 30-mM Tre were more effective than with 10-mM Tre in alleviation of salt stress in strawberry. This positive effect of Tre was possibly attributed to the improvement of carotenoids, flavonoids and anthocyanins compounds in leaves resulting in normal photochemical functioning, the activation of the enzymatic antioxidants and the compartmentalization of Na for better growth under salt stress.

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A review of bio-aerosol exposures and associated health effects in veterinary practice

100%

Samadi S., Wouters I. M., Heederik D. J. J.

Annals of Agricultural and Environmental Medicine

2013

tom 20

nr 2

Introduction. Occupational exposure to bio-aerosols has been linked to various health effects. This review presents an overview of bio-aerosol exposure levels in veterinary practices, and investigates the possibility of health effects associated with bio-aerosol exposure. Methods. A systematic literature search was carried out in PubMed. Publications were included if they provided information on bio-aerosol exposure and related health effects through veterinary practice and other professions with similar exposures, occupationally exposed to animals. Results. Few studies in veterinary settings showed that substantial bio-aerosol exposure levels (e.g. endotoxin and β(1→3)-glucan) were likely occur when handling farm animals and horses. Exposure levels are comparable to those levels observed in farming which have been associated with respiratory health effects. Animal specific allergen exposures have hardly been studied, but showed to be measurable in companion animal clinics and dairy barns. The findings of the few studies available among veterinary populations, particularly those working with farm animals and horses, are indicative of an elevated risk for developing respiratory symptoms. Studies among pig farmers, exposed to similar environments as veterinarians, strongly confirm that veterinary populations are at an increased risk of developing respiratory diseases in relation to bio-aerosol exposure, in particular endotoxin. Exposure to animal allergens during veterinary practice may cause allergic inflammation, characterized by IgE-mediated reactions to animal allergens. Nonetheless, the occurrence of sensitization or allergy against animal allergens is poorly described, apart from laboratory animal allergy, especially known from exposure to rats and mice. Conclusion. Veterinary populations are likely exposed to elevated levels of bio-aerosols such as endotoxins, β(1→3)-glucans, and some specific animal allergens. Exposures to these agents in animal farmers are associated with allergic and non-allergic respiratory effects, proposing similar health effects in veterinary populations.

Ograniczanie wyników

1 Acta Physiologiae Plantarum

1 Annals of Agricultural and Environmental Medicine

2 Samadi S.

1 Habibi G.

1 Heederik D. J. J.

1 Vaziri A.

1 Wouters I. M.

1 2019

1 2013

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Exogenous trehalose alleviates the inhibitory effects of salt stress in strawberry plants

A review of bio-aerosol exposures and associated health effects in veterinary practice