Informations et ressources scientifiques
sur le développement des zones arides et semi-arides

Accueil du site → Brèves → Brèves 2018 → Why cereal crops are so drought-tolerant

Why cereal crops are so drought-tolerant

ScienceDaily (April 27, 2018)

Why are grasses more tolerant to water scarcity ? Can other food crops be bred for this property, too, to assure or boost agricultural yields in the future ?

Titre : Why cereal crops are so drought-tolerant

ScienceDaily (April 27, 2018)

The grass family includes all the major cereals. They are vital for feeding the world’s population. Farmers produce 80 percent of all plant-based foods from grass crops. This success is due in part to the plants’ ability to adjust more quickly to dry conditions and sustain lack of water better than other plants.
But why are grasses more tolerant to water scarcity ? Can other food crops be bred for this property, too, to assure or boost agricultural yields in the future ? This could be important in the face of a growing world population and climate change that will entail more periods of dry and hot weather.

Processes in a leaf pore (stoma) of grasses. When the leaves open and close, a shuttle service takes ions to and fro between guard cells and subsidiary cells.

The plant researchers Professor Rainer Hedrich, Professor Dietmar Geiger and Dr. Peter Ache from Julius-Maximilians-Universität Würzburg (JMU) in Bavaria, Germany, are looking into these questions. They studied brewing barley to determine why grasses are more stress-tolerant and are therefore "better" crop plants than potatoes and the likes.

*Two amino acids make the difference ; * Ion shuttles make leaf pores more efficient ; * Two measuring systems for more drought resistance ; * Testing the nitrate sensor in other plants

Story Source  : University of Würzburg.

Annonce (ScienceDaily)

Page publiée le 16 mai 2018