In the Philodendron type, bisexual flowers generally consist of functional carpels and staminodes inserted on the same whorl. On the other hand, perennials mostly tend to outcross because they have more opportunities to genetically recombine in a life span spread over many years Duvick, The first crops that used the CMS fertility-restoring gene system as a method for commercially producing hybrid seed were sorghum and corn Poehlman and Sleper, Philodendron is the second most diverse genus of the Araceae, a tropical monocot family with significant morphological diversity along its wide geographic distribution in the Neotropics. The search for flower homeotic gene homologs in basal angiosperms and gnetales: Note the presence of a stomatum arrowhead.
Top view of staminodes St. Initiation of stamens asterisks at the periphery of the floral primordium. Homeotic transformations involving stamens and carpels have also been reported by Sawhney This topic has recently been discussed extensively by morphologists Sattler, , ; Mabberley and Hay, ; Endress, and molecular biologists Frohlich and Meyerowitz, ; Kramer et al.
Revista di Biologia Tropical Morphology of mature flowers and inflorescences Dieffenbachia seguine is a more or less rhizomatous plant that usually grows in open undergrowth. For these authors it is not possible to determine whether in Bognera Mayo and Nicolson the absence of staminodes is a plesiomorphy or an autapomorphy secondary loss. Developmental floral morphology of Syngonium in the context of the tribe Caladieae Araceae.
Select the topics that are inaccurate. In Syngonium , all the atypical flowers located at the base of the sterile zone correspond to sterile male flowers and result from a more or less random disorganization of the typical structure of a synandrode. GMS has been observed in sunflower, tomato, cucurbits, wheat and barley. Molecular Biology and Evolution Publisher conditions are provided by RoMEO. N2, 4 place Jussieu, 75 Paris Cedex 05, France.