Results: 13

Change in leaf anatomy, physiology, and essential oil of Varronia curassavicaJacq. accessions under two light conditions

The aim of this study was to evaluate the effect of light on anatomy, physiology and essential oil content and composition of Varronia curassavica. They were analysed two light conditions (full sunlight and protected environment with 50% shade screen) and five accessions (VCUR-101, VCUR-102, ...

Hydrographic variability in the Gulf of Papagayo, Costa Rica during 2017-2019

Rev. biol. trop; 69 (supl. 2), 2021
Introduction: The Gulf of Papagayo (GP) is a site of socioeconomic importance located in the North Pacific of Costa Rica. The ecosystem services of this site represent a benefit in local communities, and its dynamics are influenced by a coastal upwelling system that affects fishing and commercial activit...

Effect of climato-environmental parameters on chlorophyll a concentration in the lower Ganga basin, India

Rev. biol. trop; 69 (1), 2021
Introduction: Chlorophyll a concentration proxies the phytoplankton biomass which directly involves in signifying the production functions of aquatic ecosystem. Thus, it is imperative to understand their spatio-temporal kinetics in lotic environment with reference to regional climatic variabilities in th...

The Effect of Ferrous Nano-oxide Particles on Physiological Traits and Nutritional Compounds of Soybean ( Glycine max L) Seed

An. acad. bras. ciênc; 90 (1), 2018
ABSTRACT Soybean (Glycine max L.) seed contains amounts of protein, lipid, carbohydrate and mineral elements, which protein and lipid have been known as a main part for soybean's trade value. In this study, in order to investigate the effect of ferrous nano-oxide particles on nutritional compounds of soy...

Screening of melon genotypes for resistance to vegetable leafminer and your phenotypic correlations with colorimetry

An. acad. bras. ciênc; 89 (2), 2017
ABSTRACT Melon is one of the most important vegetable crops in the world. With short cycle in a system of phased planting, phytosanitary control is compromised, and a great volume of agricultural chemicals is used to control vegetable leafminer. Genetic control is an ideal alternative to avoid the damage...

Growth, photosynthetic pigments and production of essential oil of long-pepper under different light conditions

An. acad. bras. ciênc; 89 (2), 2017
ABSTRACT Piper hispidinervum C. DC. is popularly known as long-pepper and it owns a commercial value due to the essential oil it produces. Long-pepper oil is rich in safrole and eugenoln components that have insecticidal, fungicidal and bactericidal activity. It has been establish that to medicinal plant...

Seasonal behavior of Thalassia testudinum (Hydrocharitaceae) metabolites

Rev. biol. trop; 64 (4), 2016
Abstract:The marine angiosperm Thalassia testudinum, commonly known as turtle grass, is a dominant sea- grass that grows in the Caribbean Sea shelf associated to Syringodium filiforme. The hydroalcoholic extract of T. testudinum is rich in polyphenols; the most abundant metabolite in this extract is thal...

Efecto de borde en la distribución de líquenes y el contenido de clorofilas en fragmentos de Polylepis quadrijuga (Rosaceae) en el páramo de La Rusia (Boyacá-Colombia)

Rev. biol. trop; 64 (4), 2016
Resumen:La fragmentación de los ecosistemas es uno de los fenómenos antrópicos de mayor impacto global, y el efecto borde provoca que solo el interior de los fragmentos conserve sus características bióticas y abióticas originales. Los líquenes son organismos especialmente susceptibles a la variabi...

Water residence time affecting phytoplankton blooms: study case in Ibitinga Reservoir (São Paulo, Brazil) using Landsat/TM images

Braz. j. biol; 76 (3), 2016
Abstract Satellite images are an effective tool for the detection of phytoplankton blooms, since they cause striking changes in water color. Bloom intensity can be expressed in terms of chlorophyll-a concentration. Previous studies suggest the use of Landsat TM4/TM3 reflectance ratio to retrieve surface ...

Cadmium toxicity affects chlorophyll a and b content, antioxidant enzyme activities and mineral nutrient accumulation in strawberry

Biol. Res; 48 (), 2015
BACKGROUND: Cadmium (Cd) is well known as one of the most toxic metals affecting the environment and can severely restrict plant growth and development. In this study, Cd toxicities were studied in strawberry cv. Camarosa using pot experiment. Chlorophyll and malondialdehyde (MDA) contents, catalase (CAT...