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21 results for “Lobelia inflata”
Lobelia inflata (Campanulaceae) - leaf - margin of upper + lower surface
Image of Lobelia inflata (Campanulaceae) - leaf - margin of upper + lower surface
Lobelia inflata (Campanulaceae) - leaf - basal or on lower stem
Image of Lobelia inflata (Campanulaceae) - leaf - basal or on lower stem
Lobelia inflata (Campanulaceae) - stem - showing leaf bases
Image of Lobelia inflata (Campanulaceae) - stem - showing leaf bases
Lobelia inflata (Campanulaceae) - inflorescence - frontal view of flower
Image of Lobelia inflata (Campanulaceae) - inflorescence - frontal view of flower
Lobelia inflata (Campanulaceae) - inflorescence - lateral view of flower
Image of Lobelia inflata (Campanulaceae) - inflorescence - lateral view of flower
Lobelia inflata (Campanulaceae) - whole plant - in flower - general view
Image of Lobelia inflata (Campanulaceae) - whole plant - in flower - general view
Genotype-environment interaction and the maintenance of genetic variation: an empirical study of Lobelia inflata (Campanulaceae)
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Data from: The continuum between semelparity and iteroparity: plastic expression of parity in response to season length manipulation in Lobelia inflata.
Background: Semelparity and iteroparity are considered to be distinct and alternative life-history strategies, where semelparity is characterized by a single, fatal reproductive episode, and iteroparity by repeated reproduction throughout life. However, semelparous organisms do not reproduce instantaneously; typically reproduction occurs over an extended time period. If variation in reproductive allocation exists within such a prolonged reproductive episode, semelparity may be considered iteroparity over a shorter time scale.This continuity hypothesis predicts that "semelparous" organisms with relatively low probability of survival after age at first reproduction will exhibit more extreme semelparity than those with high probability of adult survival. This contrasts with the conception of semelparity as a distinct reproductive strategy expressing a discrete, single, bout of reproduction, where reproductive phenotype is expected to be relatively invariant. Here, we manipulate expected season length—and thus expected adult survival—to ask whether Lobelia inflata, a classic "semelparous" plant, exhibits plasticity along a semelparous-iteroparous continuum. Results: Groups of replicated genotypes were manipulated to initiate reproduction at different points in the growing season in each of three years. In lab and field populations alike, the norm of reaction in parity across a season was as predicted by the continuity hypothesis: as individuals bolted later, they showed shorter time to, and smaller size at first reproduction, and multiplied their reproductive organs through branching, thus producing offspring more simultaneously. Conclusions: This work demonstrates that reproductive effort occurs along a semelparous-iteroparous continuum within a "semelparous" organism, and that variation in parity occurs within populations as a result of phenotypic plasticity.
Lobelia inflata (Campanulaceae) - inflorescence - lateral view of flower
Image of Lobelia inflata (Campanulaceae) - inflorescence - lateral view of flower
Lobelia inflata (Campanulaceae) - leaf - margin of upper + lower surface
Image of Lobelia inflata (Campanulaceae) - leaf - margin of upper + lower surface
Lobelia inflata (Campanulaceae) - inflorescence - unspecified
Image of Lobelia inflata (Campanulaceae) - inflorescence - unspecified
Lobelia inflata (Campanulaceae) - whole plant - in flower - general view
Image of Lobelia inflata (Campanulaceae) - whole plant - in flower - general view
Lobelia inflata (Campanulaceae) - leaf - basal or on lower stem
Image of Lobelia inflata (Campanulaceae) - leaf - basal or on lower stem
Lobelia inflata (Campanulaceae) - inflorescence - lateral view of flower
Image of Lobelia inflata (Campanulaceae) - inflorescence - lateral view of flower
Lobelia inflata (Campanulaceae) - inflorescence - whole - unspecified
Image of Lobelia inflata (Campanulaceae) - inflorescence - whole - unspecified
Lobelia inflata (Campanulaceae) - leaf - on upper stem
Image of Lobelia inflata (Campanulaceae) - leaf - on upper stem
Data from: Microsatellite evidence for obligate autogamy, but abundant genetic variation in the herbaceous monocarp Lobelia inflata (Campanulaceae)
Although high levels of self-fertilization (>85%) are not uncommon in nature, organisms reproducing entirely through selfing are extremely rare. Predominant selfers are expected to have low genetic diversity because genetic variation is distributed among rather than within lineages, and is readily lost through genetic drift. We examined genetic diversity at 22 microsatellite loci in 105 individuals from a population of the semelparous herb Lobelia inflata L., and found (1) no evidence of heterozygosity through outcrossing, yet (2) high rates of genetic polymorphism (2-4 alleles per locus). Furthermore, this genetic variation among lineages was associated with phenotypic traits (e.g. flower colour, size at first flower). Coupled with previous work characterizing the fitness consequences of reproductive timing, our results suggest that temporal genotype-by-environment interaction may maintain genetic variation and, because genetic variation occurs only among lineages, this simple system offers a unique opportunity for future tests of this mechanism.
Data from: The continuum between semelparity and iteroparity: plastic expression of parity in response to season length manipulation in Lobelia inflata.
Open the record for dataset details and reuse information.
Data from: Microsatellite evidence for obligate autogamy, but abundant genetic variation in the herbaceous monocarp Lobelia inflata (Campanulaceae)
Open the record for dataset details and reuse information.
Data from: Secondary reproduction in the herbaceous monocarp Lobelia inflata: time-constrained primary reproduction does not result in increased deferral of reproductive effort
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