Based on a comprehensive understanding of orchid mycorrhiza, it should be possible to employ orchid mycorrhizal fungi to develop artificial propagation, and reintroduction of selected endangered species to the wild habitats (Luo et al., 2003a).
Isolation and Screening of Orchid Mycorrhizal Fungi
Isolation and screening of compatible orchid mycorrhizal fungi in China have been largely stimulated by problems encountered during rapid artificial propagation of commercial orchid seedlings of some Chinese Cymbidium and lady's slipper orchid species (Table 1).
Besides isolation of orchid mycorrhizal fungi from G.
Some studies indicated that orchid mycorrhizal fungi couid secrete gibberellins ([GA.sub.3]), heteroauxin (IAA), dormin (ABA), zeatin (ZT) and zeatin riboside (ZR).
Future Studies of Orchid Mycorrhizal Fungi in Relation to Orchid Conservation in China
In recent years, some researchers studied several species of rare and endangered Chinese orchids (Liu et al., 2004, 2008; Li & Luo, 2009; Gao et al., 2009), but few data are available on application of orchid mycorrhizal fungi in those species.
Secondly, commercial cultivation of orchids could benefit from use of orchid mycorrhizal fungi. The roles of orchid mycorrhizal fungi in initiating seed germination and promoting post-germination growth have been demonstrated experimentally for many orchid species (Table 1).
Little is known about the impacts of orchid mycorrhizal fungi on the distribution and survival of orchids in the ecosystem.
1990 The contribution of orchid mycorrhizal fungi to seed germination: a speculative review.