2006
DOI: 10.1590/s0100-84042006000200007
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Abstract: -(Seed characteristics and dispersal of dimorphic fruits segments of Cakile maritima Scopoli (Brassicaceae) population of southern Brazilian coastal dunes). Cakile maritima occurs sporadically along the southern Brazilian coast, where it is restricted to more protected sites at the base of foredunes. Somatic dimorphism in C. maritima is manifested as morphologically distinct upper and lower fruit segments (silicules). The two morphs were tested for differences in size, number of seeds, dispersal ability and na… Show more

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Cited by 12 publications
(11 citation statements)
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“…Such a dimorphism may be of adaptive significance because upper seeds are responsible for long‐distance dispersion. According to Cordazzo (2006), seeds from lower fruit valves have a lower mass than upper seeds owing to competition between ovules for limited resources. The selective seed abortion in lower valves compared with upper valves, common in the genus Cakile , may be of adaptive significance (Rodman 1974).…”
Section: Discussionmentioning
confidence: 99%
“…Such a dimorphism may be of adaptive significance because upper seeds are responsible for long‐distance dispersion. According to Cordazzo (2006), seeds from lower fruit valves have a lower mass than upper seeds owing to competition between ovules for limited resources. The selective seed abortion in lower valves compared with upper valves, common in the genus Cakile , may be of adaptive significance (Rodman 1974).…”
Section: Discussionmentioning
confidence: 99%
“…These studies have shown that the two fruit or seed morphs may differ in mass (Sorensen, 1978;Venable and Levin, 1985a;Ruiz de Clavijo, 2001), shape (Baker and O'Dowd, 1982;Cordazzo, 2006), colour (Li et al, 2005;Wang et al, 2008) and presence/absence, length and density of the pappus (Venable and Levin, 1985a;Imbert et al, 1997;Brändel, 2007). Functionally, the two morphs may differ in dispersal mode and ability (Sorensen, 1978;Baker and O'Dowd, 1982;Ma et al, 2010), ability to persist in a seed bank (Philipupillai and Ungar, 1984;Venable and Levin, 1985b;Joley et al, 2003) and dormancy/germination characteristics (Venable and Levin, 1985a;El-Keblawy, 2003;Brändel, 2004).…”
Section: Introductionmentioning
confidence: 99%
“…The approximately normal distribution of seed mass on a log scale means that selection favors relatively small seeds (the class of 10 -3 g), which are more common, compared to relatively large ones. The dominance of smaller diaspore mass could be explained in light of the harsh, nutrient-limited habitats of the coastal dunes, where the selection of species with small seeds reflects strong competition for resources (Cordazzo, 2006). Comparisons between five temperate floras spanning three continents indicated that seeds above 100 mg tend to be adapted for dispersal by vertebrates, seeds below 0.1 mg tend to be unassisted, and seeds between 0.1 and 100 mg could be dispersed by wide ranges of dispersal modes (Westoby et al, 1996).…”
Section: Discussionmentioning
confidence: 99%