Login

GPC Members Login
If you have any problems or have forgotten your login please contact [email protected]


Archeological plant remains point to southwest Amazonia as crop domestication center

The remains of domesticated crop plants at an archaeological site in southwest Amazonia supports the idea that this was an important region in the early history of crop cultivation, according to a study published in the open-access journal PLOS ONE by Jennifer Watling from the Museum of Archaeology and Ethnology at the University of São Paulo, Brazil and colleagues.

Genetic analysis of plant species has long pointed to the lowlands of southwest Amazonia as a key region in the early history of plant domestication in the Americas, but systematic archaeological evidence to support this has been rare. The new evidence comes from recently-exposed layers of the Teotonio archaeological site, which has been described by researchers as a "microcosm of human occupation of the Upper Madeira [River]" because it preserves a nearly continuous record of human cultures going back approximately 9,000 years.

In this study, Watling and colleagues analyzed the remains of seeds, phytoliths, and other plant materials in the most ancient soils of the site as well as on artefacts used for processing food. They found some of the earliest evidence of cultivated manioc, a crop which geneticists say was domesticated here over 8,000 years ago, as well as squash, beans, and perhaps calathea, and important tree crops such as palms and Brazil nut. They also saw evidence of disturbed forest and a soil type called "Anthropogenic Dark Earths" which both result from human alteration of local environments.

These findings suggest that the people of this region transitioned from early hunter-gatherer lifestyles to cultivating crops before 6,000 years ago, much earlier than previously thought. Along with plant domestication also came the familiar human habit of landscape modification, suggesting that human impact on Amazonian forests in this region goes back many thousands of years. Altogether, these results point to the Upper Madeira as a key locality to explore the earliest days of crop domestication in the New World.

Watling notes: "This discovery at the Teotonio waterfall in Southest Amazonia is some of the oldest evidence for plant cultivation in lowland South America, confirming genetic evidence."

Read the paper: Direct archaeological evidence for Southwestern Amazonia as an early plant domestication and food production centre.

Article source: PLOS.

Image credit: Eduardo Neves, 2011

News

Designing a more productive corn able to cope with future climates

An international research team has found they can increase corn productivity by targeting the enzyme in charge of capturing CO2 from the atmosphere.


‘Turbocharging’ photosynthesis increases plant biomass

Scientists from the Boyce Thompson Institute (BTI) and Cornell have boosted a carbon-craving enzyme called RuBisCO to turbocharge photosynthesis in corn. The discovery promises to be a key step in improving agricultural efficiency and yield, according to their esearch published in Nature Plants


CRISPR tames the wild groundcherry

You might not have heard of the groundcherry, or at least, never tasted one. But that could soon change thanks to research from the Van Eck Laboratory at Boyce Thompson Institute (BTI).