Asplenium nidus; The Bird’s Nest Fern: Developmental Studies and Its Conservation
نویسندگان
چکیده
Asplenium nidus L. commonly called as Bird’s Nest Fern, is a threatened, ornamental fern, which is widely used as novel foliage ornamental plant and local people use it in worship. The taxon is threatened due to over exploitation, habitat destruction and genetic barriers. To understand the constraints in the regeneration, reproductive biology studies are made. It is observed that more sporophytes are produced in composite population (13.3%) in comparison to isolate population (10%). This pattern is suggestive of the fact that the parental sporophyte is heterozygous for recessive sporophytic lethal. On the basis of the results obtained A. nidus was initially adapted for outbreeding with the capacity for considerable amount of inbreeding. The low potential of sporophyte production in isolate gametophyte could be the constitution of the zygotic genotype.
منابع مشابه
Molecular systematics of the Asplenium nidus complex from Mt. Halimun National Park, Indonesia: evidence for reproductive isolation among three sympatric rbcL sequence types.
Asplenium nidus is an epiphytic fern with large simple leaves. Because A. nidus lacks the good taxonomic characters available for species recognition, multiple cryptic species may exist within A. nidus. In Mt. Halimun National Park, West Java, Indonesia, three rbcL sequence types of A. nidus were recorded. All plants regardless of rbcL sequence were 2n = 144. Crossing experiments among these rb...
متن کاملSequencing of a Segment of a Monilophyte Species Mitochondrial Genome Reveals Features Highly Similar to those of Seed Plant mtDNAs
A continuous sequence of 20,374 bp has been produced corresponding to an equivalent region of the mitochondrial genome of the fern Asplenium nidus. The information content of this sequence includes: several segments from chloroplast origin, three tRNA genes of probable native type, a couple of inverted repeats, three protein genes and a seg-
متن کاملSoral crypsis: protective mimicry of a coccid on an Indian fern.
Herbivory with crypsis is not well documented in ferns. The present record of cryptic coloration of coccid Saissetia filicum Boisduval (Homoptera: Coccidae) to the sori of a fern species Asplenium nidus L. (Aspleniaceae) is unique. Predatory beetles (Jauravia sp., Coleoptera: Coccinellidae) that feed on the coccids, are suggested to be selective pressure for the development of the present homop...
متن کاملThe role of callose in guard-cell wall differentiation and stomatal pore formation in the fern Asplenium nidus.
BACKGROUND AND AIMS The pattern of callose deposition was followed in developing stomata of the fern Asplenium nidus to investigate the role of this polysaccharide in guard cell (GC) wall differentiation and stomatal pore formation. METHODS Callose was localized by aniline blue staining and immunolabelling using an antibody against (1 --> 3)-beta-d-glucan. The study was carried out in stomata...
متن کامل