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Desert bacteria protect food crops from salt toxicity

Phys.org/news (FEBRUARY 7, 2019 )

Titre : Desert bacteria protect food crops from salt toxicity

Bacteria isolated from the Saudi desert have demonstrated plant-growth-promoting properties that could make them useful as biofertilizers.

Phys.org/news (FEBRUARY 7, 2019 )

Présentation
The researchers in this team study desert bacteria for their potential to promote plant growth in stressed soils, such as those facing drought, salinity, extreme temperatures or nutrient deficiency.

The team collected soil samples from sites in two desert regions in Saudi Arabia : Jizan, located on the southern Red Sea coast, and Al Wahbah Crater, part of the extinct Harrat volcanic chain in western Saudi Arabia.

They also took root samples from four types of plants and examined the samples for their bacterial content. They found large numbers and diverse kinds of bacteria in the desert soil, but their number and diversity were smaller in the soil attached to the plants’ roots, a zone known as the rhizosphere, and even smaller in the endosphere, within the roots1

A significant number of the bacteria isolated from the plants’ endospheres were shown to have growth-promoting traits. The researchers introduced some of these bacteria, under laboratory conditions, to salt-stressed soil surrounding the roots of Arabidopsis thaliana (thale cress), which is often used to study plant development. They found they conferred salt-stress tolerance to the plant, promoting its ability to grow

Source  : King Abdullah University of Science and Technology

Annonce (Phys.org/news)

Page publiée le 25 juin 2021