Characterization of somatic embryogenesis in Pelargonium××hortorum mediated by a bacterium View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

1999-03

AUTHORS

B. N. S. Murthy, N. N. Vettakkorumakankav, S. KrishnaRaj, J. Odumeru, P. K. Saxena

ABSTRACT

Several cultivars of hybrid seed geranium (Pelargonium×hortorum Bailey), previously shown to be recalcitrant in culture, produced somatic embryos at high frequency when explants were co-cultivated with a morphogenesis promoting bacterium. This bacterium was isolated as an in vitro contaminant from cultures of geranium seedling explants and identified as belonging to the genus Bacillus and species circulans. Co-cultivation of hypocotyl explants with the bacterium promoted somatic embryo formation and improved both the frequency and quality of somatic embryos. In the cultivar Ringo Rose, the least responsive among the cultivars screened, the embryogenic response was more than four times that of axenic cultures. Nearly 70% of these embryos converted into plantlets, while the somatic embryos induced under axenic conditions developed poorly and plantlet formation was inconsistent. Among the different treatments of bacterial culture tested (autoclaved culture, culture filtrate, sonicated bacterial culture, sonication of bacterial culture followed by filtration, HPLC fractionation of crude bacterial lysate), only two HPLC fractions promoted embryogenesis to a marginal degree. Co-cultivation of the explants with bacterium during the first week of induction was crucial for obtaining high-frequency embryogenesis, indicating the role of bacterial stimuli during the induction process. More... »

PAGES

607-613

Journal

TITLE

Plant Cell Reports

ISSUE

7-8

VOLUME

18

Author Affiliations

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s002990050630

DOI

http://dx.doi.org/10.1007/s002990050630

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1023669041


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