We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Evidence of 2 n microspore production in a natural diploid population of Turnera sidoides subsp. carnea and its relevance in the evolution of the T. sidoides ( Turneraceae) autopolyploid complex.
- Authors
Kovalsky, Ivana; Solís Neffa, Viviana
- Abstract
Turnera sidoides is a complex of distylous perennial rhizomatous herbs that includes five subspecies. Since polyploidy has played a prominent role within this species ( x = 7), ongoing studies in T. sidoides are focused on the understanding of the mechanisms involved in the origin and the establishment of polyploids. Therefore, aiming to contribute to the understanding of the mode of polyploid formation, in this study we investigated the frequency of unreduced microspores in a natural diploid population of T. sidoides subsp. carnea by analyzing the size range of pollen and the constitution of the sporads . The results showed that some of the individuals studied produced 2 n and 4 n microspores, both in short- and long-styled floral morphs. The analysis performed documents the production of unreduced microspores in T. sidoides subsp. carnea and provides evidence that support the hypothesis of sexual polyploidization as one of the most probable mechanisms involved in the origin of polyploids within this species complex. The role of unreduced pollen in the establishment and persistence of newly formed polyploids in diploid populations of T. sidoides is also discussed.
- Subjects
MICROSPORES (Botany); TURNERA diffusa; TURNERACEAE; PERENNIALS; POLYPLOIDY; POLLEN; DIPLOIDY
- Publication
Journal of Plant Research, 2012, Vol 125, Issue 6, p725
- ISSN
0918-9440
- Publication type
Article
- DOI
10.1007/s10265-012-0493-7