Are drought-resistance promoting bacteria cross-compatible with different plant models?

Ramona Marasco, Eleonora Rolli, Gianpiero Vigani, Sara Borin, Claudia Sorlini, Hadda Ouzari, Graziano Zocchi, Daniele Daffonchio*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

44 Scopus citations

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 noncultivated 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.

Original languageEnglish (US)
Article numbere26741
JournalPlant Signaling and Behavior
Volume8
Issue number10
DOIs
StatePublished - Nov 27 2013

Keywords

  • Arid ecosystem
  • Drought tolerance
  • Endosphere
  • Plant growth promoting bacteria
  • Plant-bacteria cross-compatibility
  • Rhizosphere
  • Water stress

ASJC Scopus subject areas

  • Plant Science

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