The stigma of 31 taxa of Aylostera (Cactaceae) was studied using environmental scanning electron microscopy. Seven stigma types could be defined, based on the degree of fusion of the stigmatic lobes and, when these are completely separated (types I and II), their orientation. Four types (types IV, V, VI and VII) are present only in Aylostera subg. Mediolobivia, two of which (types IV and VII) are species-specific. Stigma morphology was found to be a good diagnostic character in Aylostera subg. Mediolobivia, allowing in some cases to distinguish species that had been confused previously. The stigmatic types here defined seem apt to characterize natural groups within the subgenus and are useful as an aid for species identification and the characterization of new taxa.
The importance of stigma morphology in Aylostera Speg. subgen. Mediolobivia (Backeb.) Rowley (Cactaceae) for systematic investigation / S Mosti; C Giordano; M Sajeva; Alessio Papini. - In: PLANT BIOSYSTEMS. - ISSN 1724-5575. - ELETTRONICO. - (2013), pp. 1-1. [10.1080/11263504.2013.829881]
The importance of stigma morphology in Aylostera Speg. subgen. Mediolobivia (Backeb.) Rowley (Cactaceae) for systematic investigation
PAPINI, ALESSIO
2013
Abstract
The stigma of 31 taxa of Aylostera (Cactaceae) was studied using environmental scanning electron microscopy. Seven stigma types could be defined, based on the degree of fusion of the stigmatic lobes and, when these are completely separated (types I and II), their orientation. Four types (types IV, V, VI and VII) are present only in Aylostera subg. Mediolobivia, two of which (types IV and VII) are species-specific. Stigma morphology was found to be a good diagnostic character in Aylostera subg. Mediolobivia, allowing in some cases to distinguish species that had been confused previously. The stigmatic types here defined seem apt to characterize natural groups within the subgenus and are useful as an aid for species identification and the characterization of new taxa.File | Dimensione | Formato | |
---|---|---|---|
87bozzeStimmiPlantBiosystems.pdf
Accesso chiuso
Tipologia:
Altro
Licenza:
Tutti i diritti riservati
Dimensione
359.09 kB
Formato
Adobe PDF
|
359.09 kB | Adobe PDF | Richiedi una copia |
I documenti in FLORE sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.