scholarly journals Symbiotic germination and development of the myco-heterotrophic orchid Neottia nidus-avis in nature and its requirement for locally distributed Sebacina spp.

2002 ◽  
Vol 154 (1) ◽  
pp. 233-247 ◽  
Author(s):  
S. L. McKendrick ◽  
J. R. Leake ◽  
D. Lee Taylor ◽  
D. J. Read
Keyword(s):  
Symbiotic Germination

Effect of IAA on symbiotic germination of an Australian orchid and its production by orchid-associated bacteria

1994 ◽  
Vol 159 (2) ◽  
pp. 291-295 ◽  
Author(s):  
K. G. Wilkinson ◽  
K. W. Dixon ◽  
K. Sivasithamparam ◽  
E. L. Ghisalberti
Keyword(s):  
Associated Bacteria ◽  
Symbiotic Germination

scholarly journals Symbiotic and Asymbiotic Germination of Dendrobium officinale (Orchidaceae) Respond Differently to Exogenous Gibberellins

2020 ◽  
Vol 21 (17) ◽  
pp. 6104 ◽  
Author(s):  
Juan Chen ◽  
Bo Yan ◽  
Yanjing Tang ◽  
Yongmei Xing ◽  
Yang Li ◽  
...  
Keyword(s):  
Seed Germination ◽  
Mycorrhizal Fungi ◽  
Calcium Binding ◽  
Germination Rate ◽  
Dendrobium Officinale ◽  
Fungal Colonization ◽  
Fungal Mycelium ◽  
High Concentration ◽  
Symbiotic Germination ◽  
Asymbiotic Germination

Seeds of almost all orchids depend on mycorrhizal fungi to induce their germination in the wild. The regulation of this symbiotic germination of orchid seeds involves complex crosstalk interactions between mycorrhizal establishment and the germination process. The aim of this study was to investigate the effect of gibberellins (GAs) on the symbiotic germination of Dendrobium officinale seeds and its functioning in the mutualistic interaction between orchid species and their mycobionts. To do this, we used liquid chromatograph-mass spectrometer to quantify endogenous hormones across different development stages between symbiotic and asymbiotic germination of D. officinale, as well as real-time quantitative PCR to investigate gene expression levels during seed germination under the different treatment concentrations of exogenous gibberellic acids (GA3). Our results showed that the level of endogenous GA3 was not significantly different between the asymbiotic and symbiotic germination groups, but the ratio of GA3 and abscisic acids (ABA) was significantly higher during symbiotic germination than asymbiotic germination. Exogenous GA3 treatment showed that a high concentration of GA3 could inhibit fungal colonization in the embryo cell and decrease the seed germination rate, but did not significantly affect asymbiotic germination or the growth of the free-living fungal mycelium. The expression of genes involved in the common symbiotic pathway (e.g., calcium-binding protein and calcium-dependent protein kinase) responded to the changed concentrations of exogenous GA3. Taken together, our results demonstrate that GA3 is probably a key signal molecule for crosstalk between the seed germination pathway and mycorrhiza symbiosis during the orchid seed symbiotic germination.

scholarly journals Immunolocalization and Changes of Hydroxyproline-Rich Glycoproteins During Symbiotic Germination of Dendrobium officinale

2018 ◽  
Vol 9 ◽  
Author(s):  
Yuan-Yuan Li ◽  
Xiao-Mei Chen ◽  
Ying Zhang ◽  
Yu-Hsiu Cho ◽  
Ai-Rong Wang ◽  
...  
Keyword(s):  
Dendrobium Officinale ◽  
Symbiotic Germination

Associated fungi, symbiotic germination and in vitro seedling development of the rare Andean terrestrial orchid Chloraea riojana

Flora ◽  
2016 ◽  
Vol 224 ◽  
pp. 106-111 ◽  
Author(s):  
Sebastián Fracchia ◽  
Adriana Aranda-Rickert ◽  
Carolina Rothen ◽  
Silvana Sede
Keyword(s):  
Seedling Development ◽  
Terrestrial Orchid ◽  
Symbiotic Germination

scholarly journals Symbiotic germination of threatened Australian terrestrial orchids and the effect of nursery potting media on seedling survivals

Lankesteriana ◽  
2015 ◽  
Vol 7 (1-2) ◽  
Author(s):  
Magali Wright ◽  
Zoe Smith ◽  
Richard Thomson ◽  
Rob Cross
Keyword(s):  
Research And Development ◽  
Mycorrhizal Fungi ◽  
Ex Situ ◽  
Symbiotic Germination ◽  
Terrestrial Orchids ◽  
Potting Media ◽  
Victorian Department ◽  
The University

Since the early 1990s, the RBG has contributed to the conservation of Victoria’s Endangered orchids through its ex situ propagation program. Working cooperatively with the Victorian Department of Sustainability and Environment (DSE), the Melbourne Zoo, the Australasian Native Orchid Society, The University of Melbourne, RMIT University and Parks Victoria, research and development has lead to a greater understanding of Victoria’s terrestrial orchids and their associated mycorrhizal fungi, and assisted in the implementation of Recovery Plans. 

Symbiotic germination capability of four Epipactis species (Orchidaceae) is broader than expected from adult ecology

2012 ◽  
Vol 99 (6) ◽  
pp. 1020-1032 ◽  
Author(s):  
T. Tesitelova ◽  
J. Tesitel ◽  
J. Jersakova ◽  
G. Rihova ◽  
M.-A. Selosse
Keyword(s):  
Symbiotic Germination
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