segunda-feira, 17 de dezembro de 2012

Jardinage naturel : un potager bio avec Josiane Goepfert

Jardinage biologique, écologique ou naturel ? Comment entretenir votre jardin sans pesticides ? Quelques minutes avec Josiane Goepfert dans son potager d'une curieuse dans le Doubs pour en apprendre d'avantage.

Let's Talk About Soil - English - subtitled

This animated film tells the reality of soil resources around the world, covering the issues of degradation, urbanization, land grabbing and overexploitation; the film offers options to make the way we manage our soils more sustainable.

The film is also available in German, Spanish, French and Arabic : here

For more information visit :

Director: Uli Henrik Streckenbach (
Design: Uli Henrik Streckenbach, Ronny Schmidt (
Modelling: Ronny Schmidt, Uli Henrik Streckenbach
Character Rigging: Maik Lochmann
Animation: Uli Henrik Streckenbach, Ronny Schmidt
Scarecrow Artist: Andrea Abendroth
Concept: Uli Henrik Streckenbach

Music and Sound Design: Marcus Illgenstein (
English Voice: Robin Merrill
Foley Artist: Martin Langenbach, Metrix Media
Foley Recording Engineer: Christoph Wieczorek, Metrix Media

Foleys recorded at Metrix Media.
Voice-over recorded at VSI Verlin.

domingo, 16 de dezembro de 2012

Beneficial Fungi

In this segment, Dr. Gail Wilson, Associate Professor of Natural Resource ecology and management, joins Oklahoma Gardening host Kim Toscano for a close look at fungal life beneath the soil surface.

Plant interaction with friendly bacteria gives pathogens their break

Professor Giles Oldroyd of the John Innes Centre explains how plant roots form beneficial interactions with microbes in the soil. Almost all plants associate with mycorrhizal fungi to help in the uptake of nutrients such as phosphate. Some plants, particularly legumes, also associate with bacteria that 'fix' atmospheric nitrogen into a form the plant can use as fertiliser.
In two papers published in Current Biology, the researchers describe how these two interactions are mediated within the plant by a common signalling pathway, and have identified a specific mycorrhizal transcription factor. They also show how the signalling pathway has been recruited by pathogenic microbes, presenting a challenge to the plant to make sure it only forms beneficial interactions

Do trees communicate?

Root networks, trees, forest, mycorrhizae,

Sharon Long (Stanford) Part 2 : Function and regulation of Sinorhizobium nodulation genes

Legume plants form specialized root nodules to host "rhizobia", nitrogen-fixing bacterial symbionts. Rhizobia hosting legumes are able to grow without exogenous nitrogen fertilizer allowing them to be high in protein and to provide nutrition to surrounding plants. In part 1 of her talk, Long gives an overview rhizobium-legume symbiosis including infection and nodule formation and the chemical signals exchanged between the plant and the bacteria.

In Part 2. Long goes into more detail on how chemicals released from legumes increase transcription of specific bacterial genes required for plant infection, while in Part 3 she describes how bacterial factors induce production of specific proteins by the plant. By using a custom gene chip, Long can follow the regulation of both Sinorhizobium genes and alfalfa genes at the same time, during nodule formation. This has allowed her to show that this is an extremely complex process with the expression of hundreds of plant and bacterial genes changing during this process.

Sharon Long (Stanford) Part 1 : Cooperation between bacteria and plants for protein nutrition

Legume plants form specialized root nodules to host "rhizobia", nitrogen-fixing bacterial symbionts. Plants which can host symbiotic nitrogen fixing rhizobia are able to grow without exogenous nitrogen fertilizer. This allows legumes to be high in protein and to provide nutrition to surrounding plants. Genetic, molecular and cell biology approaches show that this process is quite complex and is governed in part by an exchange of chemical signals.

The Hans Jenny Memorial Lecture in Soil Science - The Genius of Soil

Garrison Sposito holds the Betty and Isaac Barshad Chair in Soil Science at Berkeley. He was a personal friend of Hans Jenny for nearly 30 years. Professor Sposito, whose academic degrees are in agriculture, specializes in physical chemistry applied to natural waters and soils. He was been elected a Fellow of six international scientific societies and has received numerous awards for his teaching and awards. In 2008 he was designated a Legend in Environmental Chemistry by the American Chemical Society, the world's largest scientific organization.

Simplicité volontaire et décroissance 2 (autres réflexions et pas de côté)

Réalisé et produit par Jean-Claude Decourt, avec la complicité de Jeff, Elsa Decourt, Gérard Clanet, Claude Fages, Jean-Marc Cougrand.

Ce documentaire approfondit les réflexions du film 1 et donne la parole à des femmes et des hommes qui pensent et vivent autrement.

Avec également des interventions de : Pierre Rabhi, Alain Dufranc, Sabine Rabourdin, Lydia Müller, Jean-Claude Besson-Girard, Miguel Benassayag, Françoise Gollain, jacques Grinevald, Isabelle Soccorsi, Jo Sacco, Fabienne Brutus, Jocelyn Patinel, Françoise Matricon, Serge Latouche ...

sábado, 15 de dezembro de 2012

As Bases da Agricultura Biológica - 2ª Edição revista e atualizada
Com 548 páginas, das quais 37 a cores, este livro fala dos princípios básicos e fundamentais da agricultura biológica e conta com a colaboração de 17 autores, técnicos no modo de produção biológico, alguns dos quais também agricultores, bem como alguns professores universitários: Jorge Ferreira; António Strecht; Fernando Serrador; Laura Torres; José Carlos Marques; Margarida Silva; Ana Cristina Cunha-Queda; Raul Rodrigues; José Carlos Franco; António Marreiros; Maria Mendes Fernandes; Isabel Mourão; Miguel Brito; Ernesto Vasconcelos; Florentino Valente; Fernanda Cabral.
De Leitura "obrigatória", para todos os intervenientes neste sector e também para agricultores, técnicos, professores e ambientalistas que se interessem ou dediquem a uma agricultura sustentável que respeite o Homem e o ambiente.

Biosfera 371 : Porquê plantar milho OGM em Portugal?

Será que vale a pena plantar milho geneticamente modificado em Portugal? Esta semana, o Biosfera vai até ao Alentejo, onde os OGM estão em maior expansão. Os agricultores estão a obter ótimos resultados a erradicar as pragas, mas o preço a pagar pode ser demasiado alto. As resistências e as contaminações são um risco constante.