Anther Appendages of Incarvillea Trigger a Pollen-dispensing Mechanism

Han, Yi; Dai, Chaoyang; Yang, Chun‐Feng; Wang, Qingfeng; Motley, Timothy J.

doi:10.1093/aob/mcn102

Cited by 22 publications

(23 citation statements)

References 38 publications

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“…), anther appendages (Han et al . ) and anther arrangement (Harder & Barrett ; Kudo ). However, most plants do not possess these specialised mechanisms.…”

Section: Introductionmentioning

confidence: 99%

“…Because pollen release from mature anthers is the premise for pollination, any antherrelated features may directly affect the efficiency of pollen delivery by pollinators and potentially lead to adaptation to a specific pollination system (Buchmann 1983;Bernhardt 1996). Many studies, some recent, have focused on various anther characteristics corresponding to dispensing mechanisms, including poricidal anthers (Harder & Barclay 1994;King & Buchmann 1996), secondary pollen presentation (Howell et al 1993;Harder & Wilson 1994;Castro et al 2008), anther appendages (Han et al 2008) and anther arrangement (Harder & Barrett 1993;Kudo 2003). However, most plants do not possess these specialised mechanisms.…”

Section: Introductionmentioning

confidence: 99%

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Pollen packaging and dispensing: adaption of patterns of anther dehiscence and flowering traits to pollination in three Epimedium species

Wang

Gituru

et al. 2013

Plant Biol J

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Pollen presentation theory (PPT) predicts that plant species typically pollinated by frequent and wasteful pollinators ought to be much more parsimonious and only gradually release pollen compared to plant species pollinated by infrequent pollinators that are efficient at delivering the pollen they remove. To test PPT, we compare the pollen presentation schedules and pollination systems in three related Epimedium species, having different pollinators. Results showed that differences in anther dehiscence and flowering traits resulted in different pollen packaging schedules. For E. sutchuenense and E. franchetii, a special 'roll-up' movement of the anther wall during anther dehiscence increased pollen removal compared to the dehiscence pattern in E. mikinorii, which lacked the 'roll-up' movement. Investigations revealed that honeybees had a higher pollen removal rate and lower stigmatic pollen load compared to bumblebees. In accordance with PPT, E. sutchuenense presents pollen sequentially and slowly for the frequent and wasteful honeybees. In comparison to E. sutchuenense, E. franchetii had a faster presentation rate and was adapted to the efficient and infrequent bumblebees. However, E. mikinorii was pollinated by both bumblebees and honeybees at high frequency and had the fastest pollen presentation. This pattern could reduce pollen wastage by honeybees and might be an adaptation to its short flower longevity (less than 1 day), to increase the chances of pollen deposition on stigmas. The study indicates that pollen presentation schedules can be a consequence of interactions among anther dehiscence, flowering traits and pollination environments for a given species.

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“…), anther appendages (Han et al . ) and anther arrangement (Harder & Barrett ; Kudo ). However, most plants do not possess these specialised mechanisms.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Pollen packaging and dispensing: adaption of patterns of anther dehiscence and flowering traits to pollination in three Epimedium species

Wang

Gituru

et al. 2013

Plant Biol J

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“…; Han et al. ), and diverse floral morphologies, which both filter animal visits to flowers and constrain the orientation of suitable pollinators, thus determining the site of contact between the animal's body and the sex‐organs of flowers (Darwin ; Faegri and Van der Pijl ; Harder and Johnson ). A particularly striking example of the functional fit between flowers and pollinators is heterostyly, a convergent floral syndrome that has evolved on numerous occasions in at least 28 angiosperm families (Darwin ; Ganders ; Barrett ; Lloyd and Webb ).…”

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confidence: 99%

Experimental insights on the function of ancillary pollen and stigma polymorphisms in plants with heteromorphic incompatibility

et al. 2016

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Most heterostylous plants possess a reciprocal arrangement of stigmas and anthers (reciprocal herkogamy), heteromorphic self-incompatibility, and ancillary polymorphisms of pollen and stigmas. The topographical complementarity hypothesis proposes that ancillary polymorphisms function in the rejection of incompatible pollen thus promoting disassortative pollination. Here, we test this hypothesis by investigating patterns of pollen transfer and capture in populations of dimorphic Armeria maritima and A. pubigera and distylous Limonium vulgare (Plumbaginaceae), and by studying pollen adherence and germination patterns in A. maritima following controlled hand-pollinations. Armeria lacks reciprocal herkogamy allowing the evaluation of the extent to which ancillary polymorphisms affect the composition of pollen loads. We compared the amounts of compatible and incompatible pollen on stigmas in natural populations and calculated the proficiencies of pollen transfer for each mating type. We detected disassortative pollination in each species, and mating types did not differ in compatible pollen capture, although cob stigmas captured more incompatible pollen. Controlled hand-pollinations revealed the failure of incompatible pollen to adhere and germinate on stigmas. Our results provided evidence that, while structural in nature, pollen-stigma dimorphisms are tightly associated with heteromorphic incompatibility and likely function to promote disassortative pollination, especially in the absence of reciprocal herkogamy.

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“…Anthers and pistil from each flower were collected and placed separately in 1 mL microcentrifuge tubes. The number of pollen grains in each flower was determined by subsampling pollen collected from individual flowers and counted using an Olympus BH‐2 (10×) light microscope in the laboratory following the methods described in Han et al (2008). The number of ovules per ovary in each flower was counted under a stereomicroscope (SMZ 1000; Nikon, Japan).…”

Section: Methodsmentioning

confidence: 99%

Sexual expression and reproductive output in the ephemeral Geranium transversale are correlated with environmental conditions

Abdusalam

Tan

Chang

2017

American J of Botany

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Anther Appendages of Incarvillea Trigger a Pollen-dispensing Mechanism

Abstract: The anther appendage is a pollen-dispensing trigger mechanism. The configuration of the stamens and duel trigger system has evolved to allocate pollen in allotments to enhance male function.

Cited by 22 publications

References 38 publications

Pollen packaging and dispensing: adaption of patterns of anther dehiscence and flowering traits to pollination in three Epimedium species

Pollen packaging and dispensing: adaption of patterns of anther dehiscence and flowering traits to pollination in three Epimedium species

Experimental insights on the function of ancillary pollen and stigma polymorphisms in plants with heteromorphic incompatibility

Sexual expression and reproductive output in the ephemeral Geranium transversale are correlated with environmental conditions

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