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Flower and fruit structure of the endangered species Petagnaea gussonei (Sprengel) Rauschert (Saniculoideae, Apiaceae) and implications for its reproductive biology

Author:
De Castro, O., Colombo, P., Gianguzzi, L., Perrone, R.
Source:
Plant biosystems 2015 v.149 no.6 pp. 1042-1051
ISSN:
1724-5575
Subject:
Apiaceae, asexual reproduction, autogamy, breeding, endangered species, flowers, indigenous species, light microscopy, mountains, scanning electron microscopy, seed dispersal, Sicily
Abstract:
Petagnaea gussonei (Apiaceae) is an endangered species endemic to the Nebrodi mountains (north-eastern Sicily). Although an increasing number of studies have been performed on this species, its reproductive biology remains poorly understood. The aim of this study was to investigate in detail the structure of the flower and the fruit of Petagnaea , and the possible implications for its breeding system and seed dispersal mechanism. Results from fieldwork, light microscopy and scanning electron microscopy suggest (1) the presence of protandrous hermaphrodite flowers; (2) geitonogamy, autogamy, and allogamy as breeding system mechanisms of P. gussonei , even if asexual reproduction is preferred by the plant; and (3) epizoochory and hydrochory as possible modalities of fruit dispersal.
Agid:
4786503