Comparative Micromorphology of Petals in Macaronesian<i>Lotus</i>(Leguminosae) Reveals a Loss of Papillose Conical Cells during the Evolution of Bird Pollination

Ojeda, Isidro; Santos‐Guerra, Arnoldo; Caujapé‐Castells, Juli; Jaén‐Molina, Ruth; Marrero, Águedo; Cronk, Quentin

doi:10.1086/664713

Cited by 33 publications

(41 citation statements)

References 38 publications

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“…More detailed analyses of closely related species that have experienced shifts in their major pollinator show that conical petal epidermal cells can be lost and gained relatively frequently within clades. For example, loss of conical cells has been reported in the bird-pollinated Macaronesian species of Lotus (Fabaceae; Ojeda et al 2012), and the molecular genetic basis of similar losses in bird-pollinated members of the Antirrhineae, moth-pollinated Nicotiana, and buzzpollinated Solanum species is currently under analysis in our lab. These losses are likely due to the ways in which different pollinators interact with flowers and in particular with the different grip requirements of animals that land compared to those that hover while foraging.…”

Section: Petal Epidermal Cell Shapementioning

confidence: 89%

How Have Advances in Comparative Floral Development Influenced Our Understanding of Floral Evolution?

Glover¹,

Airoldi²,

Fernández‐Mazuecos³

et al. 2015

International Journal of Plant Sciences

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Editor: Patrick S. HerendeenEvolutionary developmental biology has come to prominence in the past two decades, in both the plant kingdom and the animal kingdom, particularly following the description of homeotic genes linked to key morphological transitions. A primary goal of evolutionary developmental biology ("evo-devo") is to define how developmental programs are modified to generate novel or labile morphologies. This requires an understanding of the molecular genetic basis of these programs and of the evolutionary changes they have undergone. The past decade has seen the establishment of a common language and common standards, and these changes have greatly improved the integration of evo-devo. Recently, a more comparative approach has been added to mechanistic developmental biology. In this review we attempt to show how, by using this "next-generation evo-devo" approach, insights into both developmental biology and evolutionary biology can be gained. Although the concepts we discuss are more broadly applicable, we have focused our examples on traits of the angiosperm flower, a structure that has undergone enormous morphological and developmental evolution since its relatively recent appearance in the fossil record.

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Section: Petal Epidermal Cell Shapementioning

confidence: 89%

How Have Advances in Comparative Floral Development Influenced Our Understanding of Floral Evolution?

Glover¹,

Airoldi²,

Fernández‐Mazuecos³

et al. 2015

International Journal of Plant Sciences

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“…Our microscopical studies revealed that the structures of nectaries of putatively insect pollinated species are similar. Most Fritillaria species studied had a relatively flat nectary area surrounded by slightly convex cells, important for insect pollination, providing extra perch during flower manipulation by insects, thus, increasing foraging efficiency (Whitney et al, 2011; Ojeda et al, 2012). Conical papillae, found on the nectaries of F. pyrenaica , cause the thin film of the nectar to glisten.…”

Section: Discussionmentioning

confidence: 99%

Functional Diversity of Nectary Structure and Nectar Composition in the Genus Fritillaria (Liliaceae)

et al. 2018

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Fritillaria is a genus consisting of 130 to 140 species of bulbous plants, native to temperate regions of the northern hemisphere. Generally viewed as an insect pollinated genus with the exception of two North American species, Fritillaria gentneri and F. recurva, which are described as hummingbird-pollinated and the Asian species, F. imperialis, described as passerine-pollinated. These pollinator shifts are possibly the result of adaptive changes to the structure and morphology of the nectary, as well as a change in the nectar concentration and composition. A study was conducted in a target group of 56 Fritillaria species, based on the morphology of their nectaries and nectar composition to assess the significance of pollination mode as well as its predisposition for the evolution of bird pollination. All species studied had nectaries located at their tepal base and produced nectar, but their size, shape, color, and composition all varied. Most fritillaries had hexose-rich nectar, in easily accessible and unprotected nectaries. Scanning electron microscope (SEM) analysis revealed that the surface of the nectaries of most Fritillaria species was flat and clearly distinct from that of the surrounding tissues, which might be regarded as an adaptation for insect-pollination. Nectaries of F. imperialis were considerably larger and had dilute nectar without sucrose, which was produced profusely, thereby fulfilling the criteria characteristic of ornithophilous flowers. The copious nectar of presumed hummingbird-pollinated species was rather balanced and of medium sugar concentration. Their large lanceolate nectaries contrasted sharply with the tessellated background of their tepals. These characters might indicate a mixed pollination system that engages both birds and insects. Floral anatomy and microstructure and nectar composition for Fritillaria species in subgenera Korolkowia and Liliorhiza are studied for the first time.

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“…Conical epidermal cells enhance foraging efficiency by providing a surface into which the tarsal claws of bees can grip. Variation has been found within and between species in the extent and distribution of conical epidermal cells ( [78]; EJB and BJG, unpublished), suggesting that this trait has potential as a breeding target for optimised pollinator attraction.…”

Section: E Optimising Efficiency Of Reward Acquisitionmentioning

confidence: 99%

How can an understanding of plant–pollinator interactions contribute to global food security?

Bailes

Ollerton

Pattrick

et al. 2015

Current Opinion in Plant Biology

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Pollination of crops by animals is an essential part of global food production, but evidence suggests that wild pollinator populations may be declining while a number of problems are besetting managed honey bee colonies. Animal-pollinated crops grown today, bred in an environment where pollination was less likely to limit fruit set, are often suboptimal in attracting and sustaining their pollinator populations. Research into plant-pollinator interactions is often conducted in a curiosity-driven, ecological framework, but may inform breeding and biotechnological approaches to enhance pollinator attraction and crop yield. In this article we review key topics in current plant-pollinator research that have potential roles in future crop breeding for enhanced global food security.

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Comparative Micromorphology of Petals in MacaronesianLotus(Leguminosae) Reveals a Loss of Papillose Conical Cells during the Evolution of Bird Pollination

Cited by 33 publications

References 38 publications

How Have Advances in Comparative Floral Development Influenced Our Understanding of Floral Evolution?

How Have Advances in Comparative Floral Development Influenced Our Understanding of Floral Evolution?

Functional Diversity of Nectary Structure and Nectar Composition in the Genus Fritillaria (Liliaceae)

How can an understanding of plant–pollinator interactions contribute to global food security?

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