Results: 65

Antioxidant response of cowpea co-inoculated with plant growth-promoting bacteria under salt stress

Braz. j. microbiol; 49 (3), 2018
Abstract Soil salinity is an important abiotic stress worldwide, and salt-induced oxidative stress can have detrimental effects on the biological nitrogen fixation. We hypothesized that co-inoculation of cowpea plants with Bradyrhizobium and plant growth-promoting bacteria would minimize the deleterious ...

Physiological response of Cucurbita pepo var. pepo mycorrhized by Sonoran desert native arbuscular fungi to drought and salinity stresses

Braz. j. microbiol; 49 (1), 2018
ABSTRACT Plants response to symbiosis with arbuscular mycorrhizal fungi (AMF) under water stress is important to agriculture. Under abiotic stress conditions native fungi are more effective than exotics in improving plant growth and water status. Mycorrhization efficiency is related to soil fungi develop...

Distribution and density of the bivalve Anomalocardia brasiliana in the estuarine region of Northeastern Brazil

Braz. j. biol; 78 (1), 2018
Abstract The objective of this study was to analyze the density and distribution of the bivalve Anomalocardia brasiliana in beaches in the estuarine region of the semiarid in Rio Grande do Norte State, Barra and Pernambuquinho (04°56.978'S and 37°08.961'W and 04°56.792'S and 37°09.375'W, respectively...

Estudo da resposta de mosquitos (Diptera: Culicidae) a diferentes tipos de criadouros e condições de fatores físico-químicos da água

A família dos culicídeos é diversa e possui muitas espécies com alta relevância epidemiológica e que transmitem os patógenos causadores de doenças como dengue, febre amarela e malária. Os imaturos se criam exclusivamente na água e nos mais diversos tipos de criadouros, podendo ser influenciados...

Abundance and spatial-temporal distribution of Macrobrachium surinamicum Holthuis, 1948 (Palaemonidae) in the Amazon estuary, north of Brazil

Braz. j. biol; 77 (3), 2017
Abstract Macrobrachium surinamicum is a small shrimp that inhabits rivers of low salinity. It is mainly caught as bycatch in Amazon shrimp Macrobrachium amazonicum fisheries, which is widely exploited by artisanal fisheries for food and economic needs of the riverside population. This study aimed to char...

Variation of the interphase heterochromatin in Artemia (Crustacea, Anostraca) of the Americas is related to changes in nuclear size and ionic composition of hipersaline habitats

Braz. j. biol; 77 (3), 2017
Abstract The populations of Artemia (or brine shrimp) from the Americas exhibit a wide variation in the amount of interphase heterochromatin. There is interest in understanding how this variation affects different parameters, from the cellular to the organismal levels. This should help to clarify the abi...

Influence of reduced salinity on the histochemical fiber type composition of the claw closer muscle of two estuarine crab species, Cyrtograpsus angulatus and Neohelice granulata (Decapoda: Varunidae)

Int. j. morphol; 35 (2), 2017
The estuarine crustaceans are exposed to frequent and abrupt environmental salinity changes that involve adjustments at different levels in muscle tissue. The histochemical composition of fiber types of the claw closer muscle of Cyrtograpsus angulatus and Neohelice granulata (Dana, 1851) under hyper regu...

Distribución y abundancia espacial y temporal de Stomolophus meleagris (Rhizostomae: Stomolophidae) en un sistema lagunar del sur del Golfo de México

Rev. biol. trop; 65 (1), 2017
ResumenLas escifomedusas se alimentan principalmente de crustáceos microscópicos, huevos y larvas de peces, moluscos y de otras medusas. La distribución y abundancia de la escifomedusa tiene una importancia económica y ecológica ya que son depredadores que influyen en la dinámica poblacional de otr...

Variación espacio-temporal de la ictiofauna del Parque marino Xel-Há, Caribe mexicano y su relación con parámetros fisicoquímicos

Rev. biol. trop; 64 (4), 2016
Resumen:Xel-Há es un parque ecoturístico marino donde no se permite ningún tipo de extracción de flora o fauna. Una de las principales atracciones turísticas en este parque son los peces de arrecife, no existiendo trabajos publicados sobre la comunidad íctica para este sitio. En este estudio se ana...

Heterogeneity of elemental composition and natural abundance of stables isotopes of C and N in soils and leaves of mangroves at their southernmost West Atlantic range

Braz. j. biol; 76 (4), 2016
Abstract Mangrove communities were selected in the state of Santa Catarina, Brazil, near their southernmost limit of distribution, to study mineral nutrient relation in soils and plants. Communities included three true mangrove species, Rhizophora mangle, Laguncularia racemosa and Avicennia germinans, an...