Abstract:
: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.
journal_name
Plant Physioljournal_title
Plant physiologyauthors
Hirsch AMdoi
10.1104/pp.56.3.390subject
Has Abstractpub_date
1975-09-01 00:00:00pages
390-3issue
3eissn
0032-0889issn
1532-2548journal_volume
56pub_type
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