Chromosome number and pollen stainability were evaluated in Lilium L. species (L. formosanum, L. miryophillum, L. regale), and in cultivars coming from Asiatic (Elite, Pollyanna, Vivaldi) and Oriental hybrid group (Cascade, Casablanca, Galilei). All the genotypes are diploid (2n=2x=24) except cv. Elite which results triploid (2n=3x=36). The pollen stainability ranged from 90 to 98% among diploi...

The genus Mesosetum is a primarily South American genus with 42 species. Mesosetum chaseae, regionally known as 'grama-do-cerrado', is abundant in the Pantanal Matogrossense (Brazil); it is a valuable resource for livestock and for environmental conservation. We collected specimens from the Nhecolandia sub-region of the Brazilian Pantanal, located in Corumbá, Mato Grosso do Sul, Brazil. We...

The development of anther and pollen is important for male reproduction, and this process is coordinately regulated by many external and internal cues. In this study, we systematically examined the male reproductive phenotypes of a series of brassinosteroid biosynthetic and signaling mutants and found that, besides the expected cell-expansion defects, these mutants also showed reduced pollen nu...

Members of the Cyperaceae family exhibit an asymmetric microsporogenesis that results in the degeneration of three out of four meiotic products. Efforts have been made previously to describe the resulting structure, named the pseudomonad, but mechanisms concerning the establishment of cell domains, nuclear development, and programmed cell death are largely unknown. Using the Rhynchospora genus ...

Aloe L. includes plants of economic interest worldwide for their medicinal properties and ornamental character. In this study, morphological cytogenetic traits were evaluated in a hybrid obtained using jucunda Reyn. as pollen donor A. vera (L.) Burm. f. female parent, to characterize it, determine its agronomic potentialities aspects related reproduction. Conventional protocols morphometric stu...