The Effect of Sucrose on the Differentiation of Excised Fern Leaf Tissue into Either Gametophytes of Sporophytes 1
AUTOR(ES)
Hirsch, Ann M.
RESUMO
Excised juvenile leaves of Microgramma vacciniifolia (Polypodiaceae) develop sporophytic regenerants when grown on mineral agar with sucrose. The ratio of sporophytes to gametophytes produced from the leaf tissue increases with higher percentages of sucrose such that at 4% sucrose, the induction of aposporous gametophytes is a rare occurrence. Experiments varying the osmotic potential with sorbitol and those holding the osmotic potential of the culture medium constant while varying the sucrose level indicate that the effect of sucrose on the differentiation of fern leaf tissue into either gametophyte or sporophyte is nutritional rather than osmotic. A significant effect of sucrose in altering the differentiation of fern leaf tissue is the increased rate of senescence promoted by high sucrose concentrations.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=541830Documentos Relacionados
- Photosynthetic Rates of Sporophytes and Gametophytes of the Fern, Todea barbara
- Plastid Pigments of Gametophytes and Sporophytes of Musci. 1
- APOSPOROUS DIPLOID GAMETOPHYTES FROM SPOROPHYTES OF THE LIVERWORT Blasia pusilla L*
- Influence of Internal Sugar Levels on Apoplasmic Retrieval of Exogenous Sucrose in Source Leaf Tissue 1
- Hydroxycinnamoyltransferases Involved in the Accumulation of Caffeic Acid Esters in Gametophytes and Sporophytes of Equisetum arvense.