Instituto Multidisciplinario de Biología Vegetal (CONICET-UNC), C. C. 495, 5000 Córdoba, Argentina;
Am J Bot. 2004 Feb;91(2):198-206. doi: 10.3732/ajb.91.2.198.
Sophora fernandeziana is the only legume endemic to Isla Robinson Crusoe (Archipelago Juan Fernández, Chile); it is uncommon and becoming rare. Although its preservation status is listed as "vulnerable," as with many species, little is known of its reproductive biology. Flowering phenology, floral morphology, nectar features, breeding system, and visitors were analyzed in two populations. Flowering is from late winter to early spring. Flowers last 6 d and have a number of ornithophilous features. A floral nectary begins to secrete highly concentrated nectar 48 h after flowers open. Nectar secretion increases as the flower ages but culminates in active nectar reabsorption as the flower senesces. Nectar production is negatively affected by nectar removal. Self-pollen germinates and tubes grow down the style. However, pollen tubes were only observed to enter the ovaries in open pollinated styles, suggesting the possibility of an ovarian self-incompatibility mechanism. Both sexes of the two hummingbird species that inhabit the island are regular visitors. Low fruit and seed set, low genetic diversity, and a shrinking number of populations all contribute to increased concern about the future of this species-and perhaps the hummingbirds that depend on it.
苦参Fernandeziana 是唯一的豆科植物特有岛屿罗宾逊·克鲁索 （胡安·费尔南德斯群岛，智利）； 它是罕见的，变得越来越罕见。虽然它的保护状况被列为"脆弱"，与许多物种一样，对其生殖生物学知之甚少。开花物候学、花形态、花蜜特征、繁殖系统和访客在两个种群中进行了分析。花期从冬末到早春。花持续 6 天，具有许多鸟类传粉的特征。花开放后 48 小时，花的花蜜腺开始分泌高度浓缩的花蜜。随着花的衰老，花蜜分泌增加，但随着花的衰老，花蜜的主动再吸收达到顶峰。花蜜的产生受到花蜜去除的负面影响。自花粉发芽，花粉管沿花柱生长。然而，只有在开放授粉的花柱中观察到花粉管进入子房，这表明可能存在卵巢自交不亲和机制。栖息在岛上的两种蜂鸟的雌雄两性都是常客。低的果实和种子设置，低遗传多样性，和人口的减少都导致了对这个物种的未来的更多关注-也许还有依赖它的蜂鸟。
