Conservation of <i>Beclardia macrostachya</i>

Abstract

Beclardia macrostachya is a critically endangered orchid species in Mauritius. Very low level of fruit set has  been attributed to contribute to the decline in its population. Surveys carried out in the different forest regions  reveal the occurrence of this orchid at only one location, Pigeon Wood, with a present population of only 75  individuals. Biological studies at Reunion Island reveal preferential adaptation to higher altitudes, evidenced by  observed differences in fertility rates at different forest areas. Taxonomic studies using morphological characters suggest the placement of Beclardia macrostachya within a group that includes Cryptopus elatus and Aerides lawrenceae. When cultured in vitro, leaf explants developed nodular mass which failed to develop into protocorm-like bodies (PLBs). However, embryo rescue proved to be an efficient way for micropropagation of this orchid with a high regeneration capacity. Breeding programs carried out in Mauritius yielded capsules and the latter were successfully cultured to generate PLBs which would subsequently grow into plantlets.