Differences in mycorrhizal preferences between two tropical orchids

Molecular Ecology
J Tupac OteroPaul Bayman

Abstract

Orchids parasitize their mycorrhizal fungi and are dependent on them for seed germination. Controversy reigns over how specific the mycorrhizal association is in tropical species. Although there is little experimental evidence to support any viewpoint, some variation is known to exist. We compared mycorrhizal specificity and performance in two phylogenetically related epiphytic orchids from Puerto Rico, Tolumnia variegata and Ionopsis utricularioides (Oncidiinae) by integrating two techniques: phylogenetic analysis of mycorrhizal fungi based on nuclear ribosomal internal transcribed spacer (ITS) sequences, and symbiotic seed germination experiments. Most of the mycorrhizal isolates from T. variegata fell into four different clades of Ceratobasidium, while most of those from I. utricularioides were restricted to a single clade of the same genus. Seeds of T. variegata germinated equally well with fungi from both T. variegata and I. utricularioides, but seeds of I. utricularioides germinated significantly better with its own isolates. Seeds of I. utricularioides germinated and developed faster than those of T. variegata. Both the molecular phylogeny and the seed germination experiments showed that T. variegata is a generalist in i...Continue Reading

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Citations

Jun 22, 2007·Mycorrhiza·John D W Dearnaley
Mar 23, 2013·Journal of Microbiological Methods·Enrico ErcoleMariangela Girlanda
Jul 3, 2013·Mycorrhiza·Sabrina Feliciano OliveiraMaria Catarina Megumi Kasuya
Nov 4, 2006·Mycological Research·Juan Pablo SuárezIngrid Kottke
Jan 26, 2012·Molecular Ecology·Melissa K McCormickJohn P O'Neill
Jul 14, 2010·Molecular Ecology·Nigel D SwartsKingsley W Dixon
Feb 17, 2009·Annals of Botany·Nigel D Swarts, Kingsley W Dixon
Nov 1, 2016·American Journal of Botany·Paul BaymanNaida L Viera-Ruiz
Nov 21, 2013·American Journal of Botany·María L RiofríoJuan Pablo Suárez
Oct 4, 2012·American Journal of Botany·Bruno Cachapa BailaroteHans Jacquemyn
Feb 1, 2008·American Journal of Botany·Richard P SheffersonKadri Tali
Mar 9, 2019·The New Phytologist·Amanda TaylorHolger Kreft
May 6, 2020·International Journal of Molecular Sciences·Martino AdamoRaffaella Balestrini
Nov 23, 2006·Journal of the Chinese Medical Association : JCMA·Shin-E WangWing-Yiu Lui
Apr 20, 2018·Frontiers in Microbiology·Sonia Salazar-CerezoRebeca D Martinez-Contreras

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