Lacandonia schismatica is a species of mycoheterotrophic plant in the Triuridaceae. It grows in shady sites within this rainforest. They also explain that the species is difficult to cultivate and therefore they encourage other scientists to study this unique organism's biology before it can no longer be found in the wild. From Wikipedia, the free encyclopedia.
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International Journal of Plant Sciences, 3. ISSN Full text is not posted in this repository. Consult Related URLs below. Lacandonia schismatica, a mycoheterotrophic, hermaphroditic monocotyledon endemic to the Lacandon rain forest of southeast Mexico, is the only flowering plant for which a spatial inversion heterotopy, complete homeosis of the reproductive floral whorls stamens and carpels is known to occur in natural populations. In parallel, we have also searched for natural variation in floral organ arrangement in Triuris brevistylis, a closely related dioecious triurid that is found in nearby areas of the Lacandon forest.
We have found that a small proportion of L. However, in all bisexual flowers, the stamens were always central and the carpels peripheral to them. More important, we have also found that a few T. We document our findings with scanning electron micrographs, histological sections, and dissection microscope views. The Mexican triurids may be an example in which the molecular evolutionary events causally related to a major morphological change in plants can best be understood at the microevolutionary scale.
Repository Staff Only: item control page. A Caltech Library Service. More information and software credits. Item Type: Article. Received: Aug ; Revised: Nov Meyerowitz, and Elena R. No commercial reproduction, distribution, display or performance rights in this work are provided. Tony Diaz.
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Spontaneous homeotic transformations have been described in natural populations of both plants and animals, but little is known about the molecular-genetic mechanisms underlying these processes in plants. In the ABC model of floral organ identity in Arabidopsis thaliana, the B- and C-functions are necessary for stamen morphogenesis, and C alone is required for carpel identity. We provide ABC model-based molecular-genetic evidence that explains the unique inside-out homeotic floral organ arrangement of the monocotyledonous mycoheterotroph species Lacandonia schismatica Triuridaceae from Mexico. Whereas a quarter million flowering plant species bear central carpels surrounded by stamens, L. The simplest explanation for this is that the B-function is displaced toward the flower center.
International Journal of Plant Sciences, 3. ISSN Full text is not posted in this repository. Consult Related URLs below.