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Shading effect on survival, growth, and contents of secondary metabolites in micropropagated Anoectochilus plantlets
Ist Teil von
Revista brasileira de botânica, 2017-09, Vol.40 (3), p.599-607
Ort / Verlag
Cham: Springer International Publishing
Erscheinungsjahr
2017
Link zum Volltext
Quelle
SpringerLink
Beschreibungen/Notizen
Many
Anoectochilus
plants are now facing extinction; hence, they are propagated mainly from tissue culture. However, growth performance and secondary metabolites have not been fully identified on tissue-cultured plantlets from multiple
Anoectochilus
species under shading. In the present study, five
Anoectochilus
species [
A. roxburghii
(Wall.) Lindl., Fu_1;
A. koshuaensis
Hayata, Fu_2;
A. formosanus
Hayata, Tai; un-identified species of Fu_New_1 and Fu_New_2] were generated from micropropagated plantlets and cultured under shade treatments of three levels (mean light intensities: mild, ~2000 Lx; medium, ~800 Lx; intensive, ~440 Lx) for five months. Among the five
Anoectochilus
species, the Tai and Fu_New_1 species had the highest survival rate and the Tai species had the best performance of stem morphology and foliar kaempferol content in the medium shade treatment, but it had fewer leaves and lower ratio of quercetin/kaempferol than the Fu_1 species. The Fu_New_2 species had the greatest biomass accumulation and highest content of total flavonoids, especially under the mild shade treatment. Therefore, among the
Anoectochilus
species tested in this study,
A. formosanus
is suggested to be used in continuous propagation,
A. roxburghii
is suggested to be planted in stressed environment, and the new species of Fu_New_2 is suggested to be planted for the production of flavonoids. Mild and medium levels of shading are suggested to be used when biomass production and fast growing are needed for
Anoectochilus
plantlets, respectively.