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Title: Cadmium-induced and trans-generational changes in the cultivable and total seed endophytic community of Arabidopsis thaliana
Authors: Truyens, Sascha
Beckers, Bram
Thijs, Sofie
Weyens, Nele
Cuypers, Ann
Vangronsveld, Jaco
Issue Date: 2016
Citation: PLANT BIOLOGY, 18 (3), p. 376-381
Abstract: Trans-generational adaptation is important to respond rapidly to environmental challenges and increase overall plant fitness. Besides well-known mechanisms such as epigenetic modifications, vertically transmitted endophytic bacteria might contribute to this process. The cultivable and total endophytic communities of several generations of Arabidopsis thaliana seeds harvested from plants exposed to cadmium (Cd) or not exposed were investigated. The diversity and richness of the seed endophytic community decreased with an increasing number of generations. Aeromicrobium and Pseudonocardia were identified as indicator species in seeds from Cd-exposed plants, while Rhizobium was abundantly present in both seed types. Remarkably, Rhizobium was the only genus that was consistently detected in seeds of all generations, which suggests that the phenotypic characteristics were more important as selection criteria for which bacteria are transferred to the next plant generation than the actual genera. Production of IAA was an important trait for endophytes from both seed types, while ACC deaminase activity and Cd tolerance were mainly associated with seed endophytes from Cd-exposed plants. Understanding how different factors influence the seed endophytic community can help us to improve seed quality and plant growth through different biotechnological applications.
Notes: Correspondence J. Vangronsveld, Centre for Environmental Sciences, Hasselt University, Agoralaan building D, 3590 Diepenbeek, Belgium. E-mail: jaco.vangronsveld@uhasselt.be
URI: http://hdl.handle.net/1942/21242
DOI: 10.1111/plb.12415
ISI #: 000374349000004
ISSN: 1435-8603
Category: A1
Type: Journal Contribution
Validation: ecoom, 2017
Appears in Collections: Research publications

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