Exploring bacteria-induced growth and morphogenesis in the green macroalga order Ulvales (Chlorophyta)

摘要: Green macroalgae, such as Ulvales, lose their typical morphology completely when grown under axenic conditions or in the absence of appropriate microbiome. As a result, slow growing aberrant phenotypes even callus-like morphotypes are observed Ulvales. The cross-kingdom interactions between marine algae and microorganisms hence not only restricted by exchange macronutrients, including vitamins nutrients, but also infochemicals bacterial morphogenetic compounds. latter fundamental trait mediating mutualism within chemosphere where organisms interact with each other via compounds surroundings. Approximately 60 years ago, pilot studies demonstrated that certain bacteria promote growth, whereas induce morphogenesis; this is particularly true for order However, progress was made towards underlying mechanism due to complexity of, example, algal cultivation techniques, lack standardized experiments laboratory. A breakthrough research discovery compound thallusin, which isolated from an epiphytic bacterium induces normal germination restoring foliaceous Monostroma. Owing low concentration, purification structure elucidation highly biologically active still challenging. Recently, it found combination two specific Rhodobacteraceae Flavobacteriaceae can recover growth morphogenesis Ulva mutabilis cultures forming symbiotic tripartite community chemical communication. This review combines literature detailing evidences bacteria-induced set experimental approaches further proposed preparation tissues, isolation, co-cultivation experiments, analysis chemosphere.