Record ID No. |
4590 |
Author(s) |
Masahide Yamato, Yuki Ogura-Tsujita, Hiroshi Takahashi, Tomohisa Yukawa , 2014 |
Affiliation |
Department of Science Education, Faculty of Education, Chiba University, 1-33, Yayoi-cho, Inage-ku, Chiba, 263-8522, Japan, Email: myamato@chiba-u.jp |
Title |
Significant difference in mycorrhizal specificity between an autotrophic and its sister mycoheterotrophic plant species of Petrosaviaceae |
Source. Vol.(no):Page |
Journal of Plant Research |
Categories |
Mycorrhiza General |
Subjects |
Soil plant relations |
Sub-subjects |
Dependency |
Host |
Japonolirion osense, Petrosavia sakuraii (Petrosaviaceae), Miscanthus sinensis (Poaceae) |
Organism |
Archaesporales, Diversisporales, and Glomerales |
Country |
Japan, East Asia |
Abstracts |
Petrosaviaceae is a monocotyledonous plant family that comprises two genera: the autotrophic Japonolirion and the mycoheterotrophic Petrosavia. Accordingly, this plant family provides an excellent system to examine specificity differences in mycobionts between autotrophic and closely related mycoheterotrophic plant species. We investigated mycobionts of Japonolirion osense, the sole species of the monotypic genus, from all known habitats of this species by molecular identification and detected 22 arbuscular mycorrhizal (AM) fungal phylotypes in Archaesporales, Diversisporales, and Glomerales. In contrast, only one AM fungal phylotype in Glomerales was predominantly detected from the mycoheterotrophic Petrosavia sakuraii in a previous study. The high mycobiont diversity in J. osense and in an outgroup plant, Miscanthus sinensis (Poaceae), indicates that fungal specificity increased during the evolution of mycohetrotrophy in Petrosaviaceae. Furthermore, some AM fungal sequences of J. osense showed >99 % sequence similarity to the dominant fungal phylotype of P. sakuraii, and one of them was nested within a clade of P. sakuraii mycobionts. These results indicate that fungal partners are not necessarily shifted, but rather selected for in the course of the evolution of mycoheterotrophy. We also confirmed the Paris-type mycorrhiza in J. osense. |