Comparative pollen–pistil interactions and insect pollination in two Hypoxis species (Hypoxidaceae) in China and North America

Ren, Zong‐Xin; Bernhardt, Peter; Edens-Meier, Retha; Zweck, Justin; Arduser, Mike; Li, Hai Dong; Hong, Wang

doi:10.1007/s00606-018-1556-6

Cited by 7 publications

(4 citation statements)

References 30 publications

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“…Contrary to Johnson and Andersson’s (2002) observations on H. hemerocallidea in South Africa, there were only few visits of honeybees compared to the abundant visits by a single morphospecies of small solitary bees. Moreover, honeybees seemed to be mostly searching for nectar, although we did not observe any nectar in flowers of H. camerooniana , consistent with other Hypoxis species (Johnson and Andersson 2002; Rudall 2002; Ren et al 2019).…”

Section: Discussionsupporting

confidence: 88%

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The role of ultraviolet reflectance and pattern in the pollination system of Hypoxis camerooniana (Hypoxidaceae)

et al. 2019

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Apart from floral morphology and colours perceived by the human eye, ultraviolet (UV) reflectance acts as an important visual advertisement of numerous flowering plant species for pollinators. However, the effect of UV signalling on attracting pollinators of particular plant species is still insufficiently studied, especially in the Afrotropics. Therefore, we studied the pollination system of Hypoxis camerooniana in montane grasslands of Mount Cameroon, West/Central Africa. We focused mainly on the effects of the flowers’ UV reflectance on its visitors. We experimentally removed UV reflection from petals either completely or partially. Thereafter, flower visitors were recorded and pistils were collected post-flowering to quantify germinated pollen tubes per treatments. The most important visitors were bees, followed by flies. Due to their contacts with reproductive organs bees are considered as the primary pollinators. Visitation rates were lower when UV reflectance was completely removed, whereas the decrease of frequency on half-treated flowers did not differ significantly from control treatments. The complete removal of UV also affected bees’ landing behaviour, but not that of flies. We showed that the presence of UV reflectance is more important than UV pattern for bees visiting flowers of H. camerooniana. We hypothesize that exploiting all flowers irrespective of their pattern can be more efficient for pollinators in the open grasslands of high altitudes to spot these relatively scarce flowers by their UV reflectance. Furthermore, we highlight the necessity of both experimental and natural controls in similar studies to control for additional effects of the used UV manipulations.Many plants advertise their flowers with UV reflectance visible to their insect visitors. By manipulating the UV reflectance and pattern of Hypoxis camerooniana in the Afromontane grasslands of Mount Cameroon, we have shown how crucial it is for the predominant visitor, bees. Both bees' preferences for flowers and their behaviour during visits are influenced by changes in UV reflectance. However, the presence of some UV signal is more important than the specific pattern. Especially in montane grasslands with higher UV irradiation, the UV floral colours are important for recognition of flowers by potential pollinators.

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Section: Discussionsupporting

confidence: 88%

“…zernyi and H. goetzei East African Hypoxis flowers appeared to be without scent (Wiland-Szymańska 2009). So far, no nectar has been found in any Hypoxis species (Johnson and Andersson 2002; Rudall 2002; Ren et al 2019).…”

Section: Methodsmentioning

confidence: 99%

The role of ultraviolet reflectance and pattern in the pollination system of Hypoxis camerooniana (Hypoxidaceae)

et al. 2019

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“…Comparing East Asian plant-pollinator interactions with plant-pollinator interactions in other regions, especially Europe and North America, can contribute to the improved understanding of the large-scale ecological and evolutionary consequences of plant-pollinator interactions (Ren et al 2019). For example, taxa with disjunctive distributions across North America and East Asia provide opportunities to investigate how plant-pollinator interactions differ across continents (e.g., Fan et al 2011;Ren et al 2019).…”

Section: Future Workmentioning

confidence: 99%

“…These disjunctively distributed genera have more species in East Asia than in North America, and this component of the East Asian temperate flora is thus a good model system to understand the diversification of plants in temperate regions (Qian & Ricklefs 2000). Therefore, such genera provide opportunities to study how plant-pollinator interactions and the evolution of pollination systems differ among continents (Ren et al 2019).…”

Section: Introductionmentioning

confidence: 99%

Plant-pollinator interactions in East Asia: a review

Funamoto

2019

J Poll Ecol

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Pollination studies in East Asia have been developing rapidly in recent decades. East Asia may provide important information on many aspects of plant-pollinator interactions because of the rich fauna and flora and highly heterogeneous environments that occur there. In this review, plant-pollinator interactions in East Asia were summarized. Bumblebees are important pollinators of many plant species in East Asia, as well as in Europe and North America. Native honeybees may also have important roles in pollination in East Asia. Bird pollination and hawkmoth pollination may be less common in East Asia than in North America. Geographic variation in pollination interactions is expected because several types of pollinators are rare or absent in some habitats or geographic regions. For example, specialized nectar-feeding vertebrates like sunbirds and pteropodid bats are absent from most of East Asia except for some areas in its southern part. Opportunistic nectar-feeding vertebrates may have important roles in pollination where specialized nectar-feeding vertebrates are absent. Human impacts on plant pollinator interactions are understudied in this region. However, climate change, habitat degradation, and invasive species may have negative impacts on plant-pollinator interactions and thus plant reproductive success there. The information available on the plant-pollinator interactions in East Asia is still limited because many plant and pollinator taxa and many types of habitats are understudied.

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Variation in self-incompatibility and interspecific compatibility in a lineage of the mostly self-compatible genus Bulbophyllum (B. sect. Micranthae–Orchidaceae)

Rodrigues

Borba²

2023

Plant Syst Evol

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Comparative pollen–pistil interactions and insect pollination in two Hypoxis species (Hypoxidaceae) in China and North America

Cited by 7 publications

References 30 publications

The role of ultraviolet reflectance and pattern in the pollination system of Hypoxis camerooniana (Hypoxidaceae)

The role of ultraviolet reflectance and pattern in the pollination system of Hypoxis camerooniana (Hypoxidaceae)

Plant-pollinator interactions in East Asia: a review

Variation in self-incompatibility and interspecific compatibility in a lineage of the mostly self-compatible genus Bulbophyllum (B. sect. Micranthae–Orchidaceae)

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