Phytohormones in plant root-Piriformospora indica mutualism |
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| Authors: | Patrick Sch?fer Stefanie Pfiffi Lars M Voll Doreen Zajic Peter M Chandler Frank Waller Uwe Scholz J?rn Pons-Kühnemann Sophia Sonnewald Uwe Sonnewald Karl-Heinz Kogel |
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| Institution: | 1.Research Centre for Biosystems, Land Use and Nutrition; Justus Liebig University; Giessen, Germany;2.Friedrich Alexander University Erlangen-Nuremberg; Department of Biochemistry; Erlangen, Germany;3.CSIRO Plant Industry; Canberra, Australia;4.Leibniz Institute of Plant Genetics and Crop Plant Research; IPK Gatersleben; Gatersleben, Germany |
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| Abstract: | Piriformospora indica is a mutualistic root-colonising basidiomycete that tranfers various benefits to colonized host plants including growth promotion, yield increases as well as abiotic and biotic stress tolerance. The fungus is characterized by a broad host spectrum encompassing various monocots and dicots.1,2 Our recent microarray-based studies indicate a general plant defense suppression by P. indica and significant changes in the GA biosynthesis pathway.3 Furthermore, barley plants impaired in GA synthesis and perception showed a significant reduction in mutualistic colonization, which was associated with an elevated expression of defense-related genes. Here, we discuss the importance of plant hormones for compatibility in plant root-P. indica associations. Our data might provide a first explanation for the colonization success of the fungus in a wide range of higher plants.Key words: compatibility, plant defense, gibberellic acid, symbiosis, plant hormones |
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