Low legitimate pollen flow in distylic Turnera hermannioides (Passifloraceae) and its consequences on fruit and seed set

Milet‐Pinheiro, Paulo; Penante, Diana Corrêa de Andrade; Schlindwein, Clemens

doi:10.1016/j.flora.2013.09.005

Cited by 4 publications

(5 citation statements)

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“…Medeiros & Schlindwein (2006) considered that Trigona spinipes (Fabricius, 1793) presented a behavior of fidelity to the flowers of T. subulata because they present a high number of pollen grains in the corbicle. Another small bee, P. turnerae, was considered an oligolectic species by several researchers, because it collects pollen almost exclusively from T. subulata flowers, in addition to using them to establish male territory and as a mating place (Medeiros & Schlindwein, 2003, 2006Milet-Pinheiro et al, 2013).…”

Section: Discussionmentioning

confidence: 99%

Pollination of Turnera subulata: exotic or native bees?

Passos

Gimenes

2022

Iheringia, Sér. Zool.

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This work analyzed floral visitors of Turnera subulata Sm. (Turneraceae) within an anthropized area in Bahia (UEFS Campus), focusing on potential pollinators, fruit and seed production and the influence of climatic factors on this interaction. The study was carried during six months in 2018 and 2019. Aspects of floral biology and visitor behavior were observed. Turnera subulata flowers lasted approximately six hours and during this period they were exposed to visitors at different intervals to assess the peak time of fruit formation. The most frequent visitors were the bees Apis mellifera Linnaeus, 1758, Trigona sp., Augochlora sp. and Protomeliturga turnerae (Ducke, 1907). The foraging peak occurred in the morning, coinciding with the time of greatest formation of fruits and seeds, and with the time of greatest number of open flowers. Both exotic and native bees acted as potential pollinators, being considered complementary in the flower pollination process.

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Section: Discussionmentioning

confidence: 99%

Pollination of Turnera subulata: exotic or native bees?

Passos

Gimenes

2022

Iheringia, Sér. Zool.

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“…Consistent observations have been reported for flowers of distylous T. ulmifolia (Barrett ), T. subulata (Schlindwein & Medeiros ) and T. hermannioides (Milet‐Pinheiro et al . ), where A. mellifera represented one of the most frequent visitors and pollinators. Visits of native pollinators, when compared to visits by A. mellifera, to flowers of T. velutina tended to vary throughout the flowering season and could be affected by a spatial component, particularly if the abundance of A. mellifera impacts the presence and activity of native bees during their competition for floral resources.…”

Section: Discussionmentioning

confidence: 99%

Pollination biology of the hexaploid self‐compatible species Turnera velutina (Passifloraceae)

et al. 2016

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The evolution of monomorphisms from heterostylous ancestors has been related to the presence of homostyly and the loss of self-incompatibility, allowing the occurrence of selfing, which could be advantageous under pollinator limitation. However, flowers of some monomorphic species show herkogamy, attraction and rewarding traits that presumably favour cross-pollination and/or a mixed mating system. This study evaluated the contributions of pollinators, breeding system and floral traits to the reproduction of Turnera velutina, a herkogamous monomorphic species. Floral visitors and frequency of visits were recorded, controlled hand cross-pollinations were conducted under greenhouse and natural conditions, and individual variation in floral traits was characterised to determine their contribution to seed production. Apis mellifera was the most frequent floral visitor. Flowers presented approach herkogamy, high variation in nectar features, and a positive correlation of floral length with nectar volume and sugar concentration. Seed production did not differ between manual self- and cross-pollinations, controls or open cross-pollinations, but autonomous self-pollination produced, on average, 82.74% fewer seeds than the other forms, irrespective of the level of herkogamy. Differences in seed production among autonomous self-pollination and other treatments showed that T. velutina flowers depend on insect pollination for reproduction, and that approach herkogamy drastically reduced seed production in the absence of pollen vectors. The lack of differences in seed production from manual cross- and self-pollinations suggests the possible presence of a mixed mating system in the studied population. Overall, this species was possibly derived from a distylous ancestor but appears fully capable of outcrossing despite being monomorphic.

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“…There are only two Callonychium species that have been recorded in Brazil (Moure et al, 2012), and neither of these occur in Minas Gerais. Callonychium brasiliense (Ducke, 1907) occurs in Pernambuco, Ceará and Maranhão, and C. petuniae Cure & Wittmann, 1990 occurs in Paraná, Rio Grande do Sul and Santa Catarina (Moure et al, 2012;Milet-Pinheiro et al, 2013). Our study took place in Minas Gerais, and we collected in high abundance an undescribed species of Callonychium.…”

Section: Bee Species Exclusively Collected By Pan Trapsmentioning

confidence: 97%

“…The preference for white and blue pan traps in our study is mainly due to the preference of the most collected species, Callonychium sp.. Callonychium petuniae bees are oligolectic and have a high preference for petunia-purple color tones in Rio Grande do Sul (Wittmann et al, 1990). In contrast, C. brasiliense bees in Pernambuco were very abundant on Turnera hermannioides (Passifloraceae) flowers, which have cream-colored petals that gradually become yellowish toward the center of the flowers (Milet-Pinheiro et al, 2013). However, the flower preferences of the Callonychium sp.…”

Section: Pan Trap Color Preferencementioning

confidence: 99%

“…There are several methods that can be used to survey bees, but their efficacy depends on whether the purpose of the survey is to determine diversity patterns or to monitor bee abundance and species richness (Kremen et al, 1993;Roulston et al, 2007;Missa et al, 2009). Passive survey methods can be very valuable, as they allow for data to be collected simultaneously in several sites, allow for a high sampling effort, and avoid potential monitor skill bias (Cane et al, 2000;Westphal et al, 2008;Tuell & Isaacs, 2009).…”

Section: Introductionmentioning

confidence: 99%

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Surveys of the bee (Hymenoptera: Apiformes) community in a Neotropical savanna using pan traps

Viana

Lourenço

2020

Pap. Avulsos Zool.

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Bee populations are declining because of various synergistic threats, and therefore bee survey and monitoring programs are needed. Several techniques have been developed to survey bees, but the most cost-effective and suitable methods to sample bees in several sites at the same time are passive approaches, such as methods involving colored pan traps (also known as Moericke or bowl traps). Several bee surveys using pan traps have been conducted in North America, Europe, and Australia, but only a few such surveys have been done in tropical regions. We used colored pan traps (blue, yellow, and white) to assess the bee community in the Brazilian savanna ecosystem in Rio Preto State Park. Sampling was conducted in October 2013 and March 2014 along permanent trails. We also characterized the local habitat of each trail, and then we compared bee abundance with habitat complexity. In total, 187 individual bees (n = 15 species) were collected, mainly using blue and white traps. Although we were not able to sample most species that were previously recorded in this park, the pan trap method can be used to survey and monitor bee assemblages in combination with another sampling method. Habitat complexity also affected the numbers of bees sampled using the pan traps, and more bees were collected at open sites.

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Low legitimate pollen flow in distylic Turnera hermannioides (Passifloraceae) and its consequences on fruit and seed set

Cited by 4 publications

References 43 publications

Pollination of Turnera subulata: exotic or native bees?

Pollination of Turnera subulata: exotic or native bees?

Pollination biology of the hexaploid self‐compatible species Turnera velutina (Passifloraceae)

Surveys of the bee (Hymenoptera: Apiformes) community in a Neotropical savanna using pan traps

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