Fungal specificity bottlenecks during orchid germination and development

Fungal specificity bottlenecks during orchid germination and development.

Fungus-subsidized growth through the seedling stage is the most critical feature of the life history for the thousands of mycorrhizal plant species that propagate by means of 'dust seeds.' We investigated the extent of specificity towards fungi shown by orchids in the genera Cephalanthera and Epipactis at three stages of their life cycle: (i) initiation of germination, (ii) during seedling deve...

Orchid seed germination pdf

Ribonucleic acid synthesis during fungal spore germination.

Spores of several fungi were examined in an effort to understand the role of RNA in the biochemical events occurring early in germination. RNA synthesis appeared to be an essential requirement for germination in Neurospora crassa and Aspergillus nidulans but not in Alternaria solani and Peronospora tabacina. Gross changes in the relative amounts of the various molecular species of RNA were not ...

Protein synthesis during fungal spore germination: differential protein synthesis during germination of Botryodiplodia theobromae spores.

The preformed messenger ribonucleic acid in Botryodiplodia theobromae spores directs the synthesis of several relatively stable polypeptides

Protein synthesis during fungal spore germination. II. Aminoacyl-soluble ribonucleic acid synthetase activities during germination of Botryodiplodia theobromae spores.

The specific activities of 13 aminoacyl-soluble ribonucleic acid (sRNA) synthetases were measured at various time intervals during the germination of Botryodiplodia theobromae conidiospores. The enzyme activities were low or absent in ungerminated spores, and they increased rapidly as germination proceeded. When extracts of the ungerminated spores were prepared with mortar and pestle, very litt...