Botany

Retrospect

The Amazon on the spice route

Leaves, fruit, bark, roots, oils, and resin from the forest boosted the economy and brought wealth to the region during the colonial period

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Archaeology

Corn arrived in Brazil via the western Amazon and was domesticated over the course of several waves of migration

Study reveals that primitive characteristics of the species still exist, despite long-term human intervention and cultivation in a diverse range of environments

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Agriculture

Passion fruit against the Sun

Passion fruit species recommended for insomnia could also be used in sunscreen

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Botany

Discreet and voracious

New species of carnivorous plant typical of the Cerrado and Caatinga biomes discovered in the Amazon

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Climate change

Bacteria in Amazon tree trunks are capable of absorbing methane

Study by international group indicates that the phenomenon occurs in non-flooded areas

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Biodiversity

Hurricane decimates pollinating hummingbirds

Hurricane decimates population of hummingbirds that pollinate plants on Caribbean island

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Botany

Thornless cactus lives in a burrow

New species of cactus has no thorns and grows buried among quartz

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Ethics

Botanists say no to racism

Racist term to be eliminated from scientific names of plants, fungi, and algae

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Biodiversity

Almost 2,500 species face extinction in Brazil

Almost 2,500 species of animals and plants at risk of extinction in Brazil

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Pharmacology

The cannabinoid tree

Jamaican nettletree produces cannabinoids, like cannabis

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ECOLOGY

Thousands of plant species live on rocks

Thousands of plant species live on rocks

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Retrospect

Glass negatives depict science in the early twentieth century

Botanical Garden of Rio de Janeiro and other institutions preserve rare photographic collections

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ECOLOGY

Invasive species in mangroves of São Paulo

Fast-growing invasive plant spreading through mangroves in the Santos estuary

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EVOLUTION

Neighbors who lend their DNA

Plants are descendants of algae that acquired genes from fungi and bacteria, genes that became essential to the structure of plant cells

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Biodiversity

Colors found among white sandy islands of the Amazon

White sandy areas of the Amazon are home to unique plant communities

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Ethnobotany

Quilombola communities reveal the use of plants

Participatory research contributes to knowledge and university students develop cattail management plan

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Cover

Travel itinerary

The Tumucumaque Mountains National Park (PNMT) is isolated from urban areas, leaving the forest unaltered by human activity

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Cover

Amazonian Giants

Expedition investigates the scientific enigma of 80-meter-tall trees in Amapá

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Ecology

The roots of Amazonian biodiversity

By reversing the flow direction of the rivers, molding the surface, and blocking moisture from the Atlantic, the Andes made the forest a refuge and birthplace for new species of plants and animals

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Botany

An unusual bromeliad

New species of bromeliad with hairy leaves challenges perception of these plants

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ECOLOGY

Orchid uses trick to trap pollinators

Specialized structures guide flies through passages where the insect exchanges pollen between flowers

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Chemical

Method distinguishes chemical identities of coffees

New technique identifies the origin of Brazilian canephora coffees from the states that produce the most

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PALEONTOLOGY

The ice age in the brazilian pampas

Fossils such as a tibia of a giant sloth, which can measure 60 centimeters, catch the eye amongst the shells on Concheiros beach in the state of Rio Grande do Sul

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MEMORY

The grande dame of botany

An advisor to students even before she studied biology, Graziela Barroso described 132 new species of plants

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Flora

The sounds of wounded plants

Experiment shows that plants subjected to stress can emit ultrasonic sounds

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RESEARCH ITINERARIES

From physics to the environment

Marco Aurélio Nalon talks about the use of data geoprocessing to map native vegetation in the state of São Paulo

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Biology

The clock that regulates sunflowers

Circadian clock controls maturation of the hundreds of tiny flowers that form concentric circles on the heads of adult sunflowers

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Biodiversity

The climate, a driver of diversification

Regional rainfall patterns can be a decisive factor in plant diversification

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Ecology

Sawdust shows which tree species has been cut

Anti-illegal-logging technique identifies trees from sawdust using a microscope

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Ecology

Hidden life in rupestrian grasslands

Microorganisms help plants survive in the nutrient-poor soil of rupestrian grasslands

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