title: Are drought-resistance promoting bacteria cross-compatible with different plant models?
abstract: The association between plant and plant growth promoting bacteria (PGPB) contributes to the successful thriving of plants in extreme environments featured by water shortage. We have recently shown that, with respect to the non-cultivated desert soil, the rhizosphere of pepper plants cultivated under desert farming hosts PGPB communities that are endowed with a large portfolio of PGP traits. Pepper plants exposed to bacterial isolates from plants cultivated under desert farming exhibited a higher tolerance to water shortage, compared with untreated control. This promotion was mediated by a larger root system (up to 40%), stimulated by the bacteria, that enhanced plant ability to uptake water from dry soil. We provide initial evidence that the nature of the interaction can have a limited level of specificity and that PGPB isolates may determine resistance to water stress in plants others than the one of the original isolation. It is apparent that, in relation to plant resistance to water stress, a feature of primary evolutionary importance for all plants, a cross-compatibility between PGPB and different plant models exists at least on a short-term.
authors.affiliation: Department of Food; Environmental and Nutritional Sciences; DeFENS; University of Milan; Milan, Italy.
authors.forename: Ramona
authors.initials: R
authors.lastname: Marasco
authors.forename: Eleonora
authors.initials: E
authors.lastname: Rolli
authors.forename: Gianpiero
authors.initials: G
authors.lastname: Vigani
authors.forename: Sara
authors.initials: S
authors.lastname: Borin
authors.forename: Claudia
authors.initials: C
authors.lastname: Sorlini
authors.forename: Hadda
authors.initials: H
authors.lastname: Ouzari
authors.forename: Graziano
authors.initials: G
authors.lastname: Zocchi
authors.forename: Daniele
authors.initials: D
authors.lastname: Daffonchio
mesh_terms: D001419:Bacteria / Q000378:metabolism; D019755:Carbon-Carbon Lyases / Q000378:metabolism; D055864:Droughts; D017753:Ecosystem; D018517:Plant Roots / Q000382:microbiology; D017382:Reactive Oxygen Species / Q000378:metabolism; D058441:Rhizosphere
chemical_list: D017382:Reactive Oxygen Species; C033634:1-aminocyclopropane-1-carboxylate deaminase; D019755:Carbon-Carbon Lyases
keywords: 1-aminocyclopropane-1-carboxylic acid deaminase; ACCd; CS; Compatible Solutes; IAA; ROS; Reactive Oxygen Species; arid ecosystem; auxins; drought tolerance; endosphere; plant growth promoting bacteria; plant-bacteria cross-compatibility; rhizosphere; water stress