Oasis desert farming selects environment-specific date palm root endophytic communities and cultivable bacteria that promote resistance to drought
KAUST DepartmentBiological and Environmental Sciences and Engineering (BESE) Division
Extreme Systems Microbiology Lab
MetadataShow full item record
AbstractOases are desert-farming agro-ecosystems, where date palm (Phoenix dactyliferaL.) plays a keystone role in offsetting the effects of drought and maintaining a suitable microclimate for agriculture. At present, abundance, diversity and plant growth promotion (PGP) of date palm root-associated bacteria remain unknown. Considering the environmental pressure determined by the water scarcity in the desert environments, we hypothesized that bacteria associated with date palm roots improve plant resistance to drought. Here, the ecology of date palm root endophytes from oases in the Tunisian Sahara was studied with emphasis on their capacity to promote growth under drought. Endophytic communities segregated along a north-south gradient in correlation with geo-climatic parameters. Screening of 120 endophytes indicated that date palm roots select for bacteria with multiple PGP traits. Bacteria rapidly cross-colonized the root tissues of different species of plants, including the original Tunisian date palm cultivar, Saudi Arabian cultivars and Arabidopsis. Selected endophytes significantly increased the biomass of date palms exposed to repeated drought stress periods during a 9-month greenhouse experiment. Overall, results indicate that date palm roots shape endophytic communities that are capable to promote plant growth under drought conditions, thereby contributing an essential ecological service to the entire oasis ecosystem. © 2015 Society for Applied Microbiology and John Wiley & Sons Ltd.
- Endophytic fungi associated with roots of date palm (Phoenix dactylifera) in coastal dunes.
- Authors: Mohamed Mahmoud F, Krimi Z, Maciá-Vicente JG, Brahim Errahmani M, Lopez-Llorca LV
- Issue date: 2017 Apr - Jun
- Isolation and characterization of endophytic plant growth-promoting bacteria from date palm tree (Phoenix dactylifera L.) and their potential role in salinity tolerance.
- Authors: Yaish MW, Antony I, Glick BR
- Issue date: 2015 Jun
- The use of high throughput DNA sequence analysis to assess the endophytic microbiome of date palm roots grown under different levels of salt stress.
- Authors: Yaish MW, Al-Harrasi I, Alansari AS, Al-Yahyai R, Glick BR
- Issue date: 2016 Sep
- A drought resistance-promoting microbiome is selected by root system under desert farming.
- Authors: Marasco R, Rolli E, Ettoumi B, Vigani G, Mapelli F, Borin S, Abou-Hadid AF, El-Behairy UA, Sorlini C, Cherif A, Zocchi G, Daffonchio D
- Issue date: 2012
- Characterization of rhizosphere and endophytic bacterial communities from leaves, stems and roots of medicinal Stellera chamaejasme L.
- Authors: Jin H, Yang XY, Yan ZQ, Liu Q, Li XZ, Chen JX, Zhang DH, Zeng LM, Qin B
- Issue date: 2014 Jul