Rays of the family Rhinopteridae Jordan & Evermann, 1896 are highly migratory and widely distributed in warm tropical and temperate waters. Along the Brazilian coast, the presence of two species has been recorded: Rhinoptera bonasus Mitchill, 1815 and Rhinoptera brasiliensis Müller, 1836. These stingrays are commonly caught as bycatch in trawl fisheries, however, the two species lack distinctive external morphological features...

Background The Passiflora genus presents a representative variability of passion fruit species with food, pharmacological and ornamental potential. To understand this genetic variability, it is essential that genetic resources are well characterized for future use in breeding and conservation programs. The aim of this study was to investigate for the first time the diversity genetic and structure population of 88 Passiflora ge...

The level of difficulty of a secondary cognitive task (DT) can affect gait and cortical activity distinctly in individuals with Parkinson’s disease (PD). During a simpler ST, individuals with PD may use a compensatory neural mechanism by reallocating neural resources to preserve gait performance; for difficult DT, this compensation may not be the case. However, whether different levels of difficulty of a single-domain DT would...

Groundwater is a critical freshwater resource, but its quality can be compromised by anthropogenic contamination. Metals may exert selective pressure on microbial communities, promoting metal-tolerant bacteria carrying metal tolerance genes (MTGs), which are often associated with antimicrobial resistance genes (ARGs) and virulence determinants. Therefore, this study aimed to investigate Gram-negative opportunistic bacteria fro...

Salinity and soil water limitation frequently co-occur in semi-arid environments, yet their combined effects on plant water regulation remain insufficiently understood. In this study, we examined how soil moisture influences the physiological responses of beet ( Beta vulgaris L.) to increasing salinity, focusing on water relations, osmotic adjustment, and leaf succulence. Beet ( B. vulgaris L.) plants were grown in a controlle...

Increasing life expectancy has been accompanied by a higher prevalence of age-associated conditions, underscoring the need to better understand biological mechanisms of aging and to identify accessible biomarkers. Extracellular vesicles (EVs) are lipid-bilayer vesicles that mediate intercellular communication by transporting proteins, lipids, and regulatory RNAs, including microRNAs (miRNAs). Here, we investigated whether the...

Rice is essential for global food security. However, the effects of phosphorus (P) and silicon (Si) interaction on macronutrient accumulation in rice grown in tropical soils remain poorly understood, particularly regarding the persistence of these effects in subsequent crops. This study aimed to investigate the combined influence of Si and P levels on the accumulation of macronutrients (N, P, K, Ca, Mg, and S) and Si in the sh...

Tricaine methanesulfonate (MS-222) is one of the most widely used anesthetics in aquaculture management procedures and the ornamental fish trade; however, at excessive concentrations, it may induce undesirable physiological responses in fish. Thus, we evaluated the safety and reversibility of MS-222–induced anesthesia in the Amazonian flag tetra, Hyphessobrycon heterorhabdus . Fish were subjected to immersion baths at concentr...