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• W4285116503 abstract "We studied the reproductive biology in a few ferns and the effects of nitric oxide on the development of gametophyte and gametangial production. Longer time in initiation of germination indicates longer viability of the spore, and their gametophytes are comparatively healthier than those germinated earlier. The spore germination percentage in epiphytic ferns is relatively low (30%) and high in semi-aquatic species (95%). Gametophyte growth is faster in epiphytic species as compared to those of aquatic and terrestrial species. In aquatic species, the antheridia appeared much early as compared to those of in terrestrial and epiphytic species. The male gametophytes were found to be smaller, spathulate, and ameristic, whereas bisexual gametophytes were large, cordate, and meristic in composite populations. There was a sexual gap of 15–20 days in the expression of antheridia followed by formation of archegonia suggesting that the gametophytes escaped intragametophytic selfing for sporophyte production. In some case, no sporophyte was produced in isolated population indicating that the possibility of intragametophytic selfing is very rare. The percentage of sporophyte production in composite culture of epiphytic species was highly variable indicating the mixed mating system which provides flexibility in ferns and allows them to exercise both evolutionary and ecologically strategies. The intragametophytic mating is used to establish new populations through long-distance wind dispersal of single, minute spores and simultaneously maintaining significant genetic variation through intergametophytic mating. The germination of spores was found to be increased in Ceratopteris thalictroides by sodium nitroprusside (SNP – a nitric oxide donor) treatment at higher concentration (50 μM and 100 μM) while inhibited at lower concentrations (5 μM and 25 μM). SNP and NO supplementation inhibited the vegetative growth of the thallus. At higher NO concentrations (50 μM and 100 μM), the gametophytes showed abnormal growth, and antheridia formation was promoted, but archegonia formation was inhibited." @default.
• W4285116503 created "2022-07-14" @default.
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• W4285116503 date "2022-01-01" @default.
• W4285116503 modified "2023-09-26" @default.
• W4285116503 title "In Vitro Gametophyte Development, Reproductive Biology, and Nitric Oxide Signaling in Ferns" @default.
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• W4285116503 doi "https://doi.org/10.1007/978-981-16-6170-9_12" @default.
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