Abstract
In this work, we studied the main characteristics of flowering, reproductive system and diversity of pollinators for the biofuel plant Jatropha curcas (L.) in a site of tropical southeastern Mexico, within its center of origin. The plants were monoecious with inflorescences of unisexual flowers. The male flowers produced from 3062–5016 pollen grains (266–647 per anther). The plants produced fruits with both geitonogamy and xenogamy, although insect pollination significantly increased the number and quality of fruits. A high diversity of flower visiting insects (36 species) was found, of which nine were classified as efficient pollinators. The native stingless bees Scaptotrigona mexicana (Guérin-Meneville) and Trigona (Tetragonisca) angustula (Latreille) were the most frequent visitors and their presence coincided with the hours when the stigma was receptive. It is noteworthy that the female flowers open before the male flowers, favoring xenogamy, which may explain the high genetic variability reported in J. curcas for this region of the world.
Highlights
Jatropha curcas (L.) (Euphorbiaceae), possibly native to Mexico and Central America (Ovando-Medina et al, 2013; Salvador-Figueroa et al, 2015), is considered the most promising non-edible plant for the production of biofuels
When establishing new extensive crops, a multitude of factors must be taken into account, among which stands out reproductive biology (Silva & Torezan, 2008), i.e., knowledge about flowering, phenological behavior, sexual system, and fruit and seed production
Under the study conditions, J. curcas produces an average of 1.25 inflorescences per branch, and the number of female flowers per inflorescence was 1–11, with an average of 2.2
Summary
Jatropha curcas (L.) (Euphorbiaceae), possibly native to Mexico and Central America (Ovando-Medina et al, 2013; Salvador-Figueroa et al, 2015), is considered the most promising non-edible plant for the production of biofuels. Studies on floral biology and pollination ecology of J. curcas have been conducted, mainly in regions where this species is exotic, as in India (Sukarin, Yamada & Sakaguchi, 1987; Raju & Ezradanam, 2002; Bhattacharya, Datta & Kumar, 2005; Dhillon et al, 2006; Chang-Wei et al, 2007a; Quin et al, 2007; Rianti, Suryobroto & Atmowidi, 2010; Kaur, How to cite this article Rincon-Rabanales et al (2016), Reproductive biology of the biofuel plant Jatropha curcas in its center of origin.
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