rotundifolia plants (see Table I) and assuming a 76 % nutrient availability from prey (sensu Dixon et al., 1980), the increased summer biomass cancontain 92 % N, 100 % P, and only 1.6 % K from the prey in
rotundifolia, feeding led to the increased growth rate of leaves (by 72-93 % compared to the unfed controls) in the first season, while similar results were seen during the second season(leaf DW increased by 148-198 %).
In this research, the carnivorous plant Drosera rotundifolia (round-leaved sundew) was used to address several unanswered ecophysiological and evolutionary questions relating to patterns and processes of prey capture and the N nutrition of carnivorous plants.
In general, the structure and gene content of the chloroplast genome of D. rotundifolia reflects the early stage of the plant's transition to heterotrophic nutrition. The next stage in the evolution in course of transition to heterotrophy is represented by the chloroplast genomes of parasitic plants, in which not only the rearrangements of the genome and the accelerated evolution of the coding sequences are observed, but also the loss of the genes of the photosynthetic apparatus.
Results show that the adaptations of carnivory, high reproductive investment and a relatively short life span enable Drosera rotundifolia to survive and thrive in an extreme, N deficient environment.
Results obtained from the comparison of captured insect prey with background invertebrates of potential prey indicate that Drosera rotundifolia is a dietary generalist, where the quantity of prey captured per plant is positively correlated with leaf stickiness and total leaf area.
We determined the complete nucleotide sequence of the chloroplast genome (cpDNA) of the insectivorous plant Drosera rotundifolia (sundew). Sequencing of cpDNA was performed by pyrosequencing of the total plant genomic DNA. The cpDNA is a circular molecule of 192.912 bp containing a pair of 52.949 bp inverted repeat regions (IRa and IRb), which are separated by small (SSC) and large (LSC) single copy regions of 63,504 bp and 23,510 bp, respectively. The size of the chloroplast genome of D. rotundifolia is larger than that of most flowering plants due to the increase in the length of inverted repeats. Chloroplast genome of D. rotundifolia contains 88 unique genes, including the ribosomal protein genes, genes of the photosystems I and II, the cytochrome b / f complex, the subunits of ATP synthases, and RNA polymerase genes. The peculiarity of cpDNA is the absence of NADH dehydrogenase genes, which may reflect the weakened dependence of this plant on photosynthesis. Unusual is also the large number of rearrangements in D. rotundifolia cpDNA, although the structure of the chloroplast genome (the order of the genes) remains practically unchanged in almost all flowering plants. Genomic rearrangements have led to the duplication of fragments of some genes presented in the form of pseudogenes. The weakened selection pressure is also indicated by the increased rate of evolution of the sequences of certain protein-coding genes, accumulation of repeats and short insertions/deletions. However, the photosynthetic apparatus is completely preserved.
Plants: •sundew (drosera rotundifolia) •Stinging nettle Sundew the sundew is a plant that lives in bogs, swamps, and marshes.
all of these environments have a lack of nutrients in the soil.
but no matter...
rotundifolia led to a moderate increase in stem height, leaf thickness, leaf number and leaf DW per plant, but leaf area per plant was unchanged (Svensson, 1995).
rotundifolia, may be generalized as follows: carnivory is not indispensable for greenhouse growing CPs, but it is almost indispensable for CPs in natural habitats.
Resource allocation to asexual gemma production andsexual reproduction in south-western Australian pygmy and micro stilt-form species of sundew (spp., Droseraceae).