Cross-kingdom signalling regulates spore germination in the moss Physcomitrella patens

Abstract

23Plants live in close association with microorganisms that can have beneficial or detrimental 24 effects. The activity of bacteria in association with flowering plants has been extensively 25analysed. Bacteria use quorum-sensing as a way of monitoring their population density and 26interacting with their environment. A key group of quorum sensing molecules in Gram-27 negative bacteria are the N-acylhomoserine lactones (AHLs), which are known to affect the 28 growth and development of both flowering plants, including crops, and marine algae. Thus, 29AHLs have potentially important roles in agriculture and aquaculture. Nothing is known about 30 the effects of AHLs on the earliest-diverging land plants, thus the evolution of AHL-mediated 31 bacterial-plant-and algal interactions is unknown. In this paper, we show that AHLs can affect 32 spore germination in a representative of the earliest plants on land, the Bryophyte moss 33Physcomitrella patens. Furthermore, we demonstrate that sporophytes of wild isolates of 34Physcomitrella patens are associated with AHL-producing bacteria. 35 36

Axenic in vitro cultivation of 19 peat moss (Sphagnum L.) species as a resource for basic biology, biotechnology, and paludiculture

“…Differences in spore germination, plant development, and plant morphology between axenic moss cultures and field-grown mosses may be due, besides obvious abiotic factors and speed of growth, to effects of the microbiome present only in the latter. Cross-kingdom and cross-clade signalling via small molecules can influence morphology of Sphagnum similar to P. patens (Kostka et al, 2016;Decker et al, 2017;Vesty et al, 2020).…”

Essential oils and their active components applied as: free, encapsulated and in hurdle technology to fight microbial contaminations. A review

“…QS was shown to regulate spore germination, the metabolite productions as well as the development of an antimicrobial resistance ( Narla et al., 2021 ; Preda and Sãndulescu, 2019 ). Studies have demonstrated that the inhibition of QS signaling molecules suppressed the initiation of sporulation as well as spores' germination ( Vesty et al., 2020 ; Wang et al., 2018 ; Xiong et al., 2021 ).…”