Effect of quorum sensing signals produced by seaweed-associated bacteria on carpospore liberation from Gracilaria dura

Frontiers in Plant Science
Ravindra Pal SinghBhavanath Jha

Abstract

Epiphytic and endophytic bacteria associated with green macroalgae Ulva (U. fasciata and U. lactuca) and red macroalgae Gracilaria (G. corticata and G. dura) have been identified from three different seasons to evaluate the effect of quorum sensing (QS) molecules on carpospores liberation from Gracilaria dura. The bacterial isolates belonging to the orders Bacillales, Pseudomonadales, Alteromonadales, and Vibrionales were present in all seasons, whereas Actinomycetales and Enterobacteriales were confined to pre-monsoon and post-monsoon seasons, respectively. Among all the Gram-negative bacteria, seven isolates were found to produce different types of N-acyl homoserine lactones (AHLs). Interestingly, Shewanella algae produced five types of AHL: C4-HSL, HC4-HSL, C6-HSL, 3-oxo-C6-HSL, and 3-oxo-C12-HSL. Subsequently, the AHLs producing bacterial isolates were screened for carpospore liberation from G. dura and these isolates were found to positively induce carpospore liberation over the control. Also, observed that carpospore liberation increased significantly in C4- and C6-HSL treated cystocarps. Sodium dodecyl sulfate and native polyacrylamide gel electrophoresis of the total protein of the C4- and C6-HSL treated cystocarps show...Continue Reading

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Citations

Jan 19, 2016·Frontiers in Microbiology·Ravindra Pal Singh, C R K Reddy
Sep 9, 2015·Frontiers in Plant Science·Anton Hartmann, Adam Schikora
Jan 10, 2018·Frontiers in Microbiology·July Z FlorezAlejandro H Buschmann
Sep 25, 2018·Environmental Microbiology Reports·Jorge AntunesVitor Vasconcelos
Jan 11, 2020·FEMS Microbiology Reviews·Olivier N LemaireChantal Iobbi-Nivol
Jan 26, 2020·International Journal of Molecular Sciences·Sergey Dobretsov, Daniel Rittschof
Apr 20, 2018·Frontiers in Microbiology·Perumal Karthick, Raju Mohanraju
Mar 26, 2021·Microbial Biotechnology·Alberto J Martín-RodríguezUte Römling

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Methods Mentioned

BETA
electrophoresis
PCR

Software Mentioned

MEGA5
ClustalW2
JMP
MEGA

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