Pollen competition between morphs in a pollen-color dimorphic herb and the loss of phenotypic polymorphism within populations

Wang, Xiaoyue; Quan, Qiu‐Mei; Wang, Bo; Li, Yunxiang; Huang, Shuang‐Quan

doi:10.1111/evo.13445

Cited by 16 publications

(16 citation statements)

References 70 publications

(144 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…We measured the spectral reflectance of sepals, petals, and lips of H. aitchisonii . Five flowers from different individuals were examined at 300–700 nm range using a spectrometer (JAZ‐EL200; Ocean Optics, Dunedin, FL, USA), with a fiberoptic reflection probe (QR400‐7‐SR; Ocean Optics) held at 45° to the sepals, petals, and lip surface (Wang et al, ) in the evening.…”

Section: Methodsmentioning

confidence: 99%

Effective pollinia transfer by settling moths’ legs in an orchid Habenaria aitchisonii

Xiong

Jia

Chang-qiu

et al. 2019

J of Sytematics Evolution

View full text Add to dashboard Cite

A great diversity of flower morphology in orchids has long been thought to be selected by diverse pollinators. Habenaria Willd. (Orchidaceae) species are generally characterized by long nectar spurs and pollinated by long‐tongued insects (Lepidoptera), the mechanical fit between the spur and pollinator proboscis length being supposedly caused by “arms race” reciprocal selection. Here, we report that flowers of Habenaria aitchisonii Rchb. f. with nectar spurs (approximately 9 mm) were pollinated by three species of settling noctuid moths whose proboscises varied in length from 10 to 16 mm. When a settling moth crawled on the spikes and probed the flowers for nectar, pollinia were placed on the moths’ legs rather than on other body parts. Our 5‐year survey of pollinia movement and 3‐year supplemental pollination experiments indicated that fruit and seed production in this orchid were not often pollen‐limited at flower level. In a natural population in Shangri‐La, Southwest China, the proportions of pollinia removal and deposition on stigmas by moth legs were 93.8% and 83.5%, respectively. This finding of efficient pollen transfer by the pollinators’ legs in H. aitchisonii adds a new example of diverse pollinia placement on pollinators (here settling moths) in the Orchidaceae.

show abstract

Section: Methodsmentioning

confidence: 99%

Effective pollinia transfer by settling moths’ legs in an orchid Habenaria aitchisonii

Xiong

Jia

Chang-qiu

et al. 2019

J of Sytematics Evolution

View full text Add to dashboard Cite

show abstract

“…(Berberidaceae) is a perennial herb with racemose inflorescences (figure 1). Plants usually grow in shaded and wet places in forests or occasionally in thickets and on open slopes at elevations of 300-2000 m, mainly in western China [16]. Plants are 20-70 cm tall with trifoliate basal leaves.…”

Section: Materials and Methods (A) Study Speciesmentioning

confidence: 99%

Pollinator effectiveness and importance between female and male mining bee (Andrena)

et al. 2019

Self Cite

View full text Add to dashboard Cite

Bees are often considered to be effective pollinators in both agricultural and natural ecosystems but could be ineffective pollinators in that they collect large quantities of pollen for food provision but deliver little to stigmas. Male bees do not collect pollen to feed larvae, and their pollination role has been underappreciated. Here we compare pollination effectiveness, visit frequency and pollen foraging behaviour between female and male individuals of a mining bee, Andrena emeishanica , visiting a nectariferous spring flower ( Epimedium pubescens ). Female bees were observed to forage for both pollen and nectar, but male bees foraged only for nectar. Female bees had large hairy hind tibiae with conspicuous scopae, and nearly 90% of the pollen grains they collected went onto the hind legs. Male bees removed less pollen from anthers than female bees but deposited more pollen on stigmas per visit. The higher pollen transfer efficiency of male bees was due to 48.4% of pollen grains remaining ungroomed on the thorax and abdomen, available for stigma contact, but their visitation rate to flowers was much lower. Our results indicate that male solitary bees could transfer more pollen on the stigma per visit but were less important (transferred less pollen in total, because they made fewer visits per unit time) than females.

show abstract

“…For example, in Nigella degenii, plants with dark pollen set more seed when sired by dark pollen donors relative to light (Jorgensen, Petanidou, & Andersson, 2006). In Epimedium pubescens, plants with green pollen produce more seeds when sired by green pollen, than when sired by yellow pollen or a mix of both colours (Wang et al, 2018). Conversely, siring success and seed production of two colour morphs of Erythronium americanum neither differed, nor depended on the partner's colour (Austen et al, 2018).…”

Section: Identification Of Correlations Between Pollen Colour and Othmentioning

confidence: 99%

“…Recent work has examined how different pollen colour morphs influence plant-pollinator interactions (Austen, Lin, & Forrest, 2018;Ison, Tuan, Koski, Whalen, & Galloway, 2019;Wang, Quan, Wang, Li, & Huang, 2018). Pollinators learn to prefer certain pollen colour morphs, and can display strong pollen colour preferences in natural populations (Ison et al, 2019;how-ever, see Wang et al, 2018). Pollen colour morph preferences can also be population-specific (Austen et al, 2018).…”

mentioning

confidence: 99%

Pollen colour morphs take different paths to fitness

Koski

Berardi

Galloway

2020

J of Evolutionary Biology

View full text Add to dashboard Cite

Colour phenotypes are often involved in communication and are thus under selection by species interactions. However, selection may also act on colour through correlated traits or alternative functions of biochemical pigments. Such forms of selection are instrumental in maintaining petal colour diversity in plants. Pollen colour also varies markedly, but the maintenance of this variation is little understood. In Campanula americana, pollen ranges from white to dark purple, with darker morphs garnering more pollinator visits and exhibiting elevated pollen performance under heat stress. Here, we generate an F2 population segregating for pollen colour and measure correlations with floral traits, pollen attributes and plant‐level traits related to fitness. We determine the pigment biochemistry of colour variants and evaluate maternal and paternal fitness of light and dark morphs by crossing within and between morphs. Pollen colour was largely uncorrelated with floral traits (petal colour, size, nectar traits) suggesting it can evolve independently. Darker pollen grains were larger and had higher anthocyanin content (cyanidin and peonidin) which may explain why they outperform light pollen under heat stress. Overall, pollen‐related fitness metrics were greater for dark pollen, and dark pollen sires generated seeds with higher germination potential. Conversely, light pollen plants produce 61% more flowers than dark, and 18% more seeds per fruit, suggesting a seed production advantage. Results indicate that light and dark morphs may achieve fitness through different means—dark morphs appear to have a pollen advantage whereas light morphs have an ovule advantage—helping to explain the maintenance of pollen colour variation.

show abstract

Pollen competition between morphs in a pollen-color dimorphic herb and the loss of phenotypic polymorphism within populations

Cited by 16 publications

References 70 publications

Effective pollinia transfer by settling moths’ legs in an orchid Habenaria aitchisonii

Effective pollinia transfer by settling moths’ legs in an orchid Habenaria aitchisonii

Pollinator effectiveness and importance between female and male mining bee (Andrena)

Pollen colour morphs take different paths to fitness

Contact Info

Product

Resources

About