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Rivest S, Muralidhar M, Forrest JRK. Pollen chemical and mechanical defences restrict host-plant use by bees. Proc Biol Sci 2024; 291:20232298. [PMID: 38471551 PMCID: PMC10932708 DOI: 10.1098/rspb.2023.2298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Accepted: 01/31/2024] [Indexed: 03/14/2024] Open
Abstract
Plants produce an array of chemical and mechanical defences that provide protection against many herbivores and pathogens. Putatively defensive compounds and structures can even occur in floral rewards: for example, the pollen of some plant taxa contains toxic compounds or possesses conspicuous spines. Yet little is known about whether pollen defences restrict host-plant use by bees. In other words, do bees, like other insect herbivores, tolerate the defences of their specific host plants while being harmed by non-host defences? To answer this question, we compared the effects of a chemical defence from Lupinus (Fabaceae) pollen and a putative mechanical defence (pollen spines) from Asteraceae pollen on larval survival of nine bee species in the tribe Osmiini (Megachilidae) varying in their pollen-host use. We found that both types of pollen defences reduce larval survival rate in some bee species. These detrimental effects were, however, mediated by host-plant associations, with bees being more tolerant of the pollen defences of their hosts, relative to the defences of plant taxa exploited by other species. This pattern strongly suggests that bees are adapted to the pollen defences of their hosts, and that host-plant use by bees is constrained by their ability to tolerate such defences.
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Affiliation(s)
- Sébastien Rivest
- Department of Biology, University of Ottawa, Ottawa, ON, Canada K1N 6N5
- Rocky Mountain Biological Laboratory, Crested Butte, CO 81224, USA
| | | | - Jessica R. K. Forrest
- Department of Biology, University of Ottawa, Ottawa, ON, Canada K1N 6N5
- Rocky Mountain Biological Laboratory, Crested Butte, CO 81224, USA
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2
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Sánchez-Chávez E, Vovides A, Sosa V. Pollen morphology of the genera Hidalgoa and Dahlia (Coreopsideae, Asteraceae): implications for taxonomy. PHYTOKEYS 2022; 199:187-202. [PMID: 36761880 PMCID: PMC9849023 DOI: 10.3897/phytokeys.199.79501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Accepted: 05/18/2022] [Indexed: 06/18/2023]
Abstract
Hidalgoa and Dahlia are two closely related genera in Asteraceae, tribe Coreopsideae whose limits need to be clarified. Pollen morphology has been useful for delimitation at the genus level in this family. To better define these genera, the morphology of pollen grains was observed and measured using light and scanning electron microscopy. The pollen grains of 25 species of Dahlia and Hidalgoa were acetolyzed and analyzed. Pollen is tricorporate in most of the species studied, although in a few species in Dahlia, grains were found to be hexacolporate. The most outstanding differentiating characters among species of Dahlia and Hidalgoa are colpus length (greater in Hidalgoa) and shape of spines (conical in Hidalgoa). In addition, lalongate ora are larger in Hidalgoa than in Dahlia. A PCA analysis of thirteen pollen characters, identified species of Hidalgoa in a discrete group and Dahliacuspidata as an outlier. These distinctive attributes in pollen morphology support the idea that pollen morphology is useful for delimitation at the generic level in the Dahlia clade. Further evidence from other sources, genetic or anatomical, might contribute to demarcating Dahlia and Hidalgoa, and provide insight into the family's evolutionary history.
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Affiliation(s)
- Erandi Sánchez-Chávez
- Biología Evolutiva, Instituto de Ecología, A.C. Carretera Antigua a Coatepec 351, 91073 El Haya, Xalapa, Veracruz, MexicoBiología Evolutiva, Instituto de EcologíaVeracruzMexico
| | - Andrew Vovides
- Biología Evolutiva, Instituto de Ecología, A.C. Carretera Antigua a Coatepec 351, 91073 El Haya, Xalapa, Veracruz, MexicoBiología Evolutiva, Instituto de EcologíaVeracruzMexico
| | - Victoria Sosa
- Biología Evolutiva, Instituto de Ecología, A.C. Carretera Antigua a Coatepec 351, 91073 El Haya, Xalapa, Veracruz, MexicoBiología Evolutiva, Instituto de EcologíaVeracruzMexico
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3
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Jardine PE, Palazzesi L, Tellería MC, Barreda VD. Why does pollen morphology vary? Evolutionary dynamics and morphospace occupation in the largest angiosperm order (Asterales). THE NEW PHYTOLOGIST 2022; 234:1075-1087. [PMID: 35147224 DOI: 10.1111/nph.18024] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Accepted: 02/04/2022] [Indexed: 06/14/2023]
Abstract
Morphological diversity (disparity) is a key component of biodiversity and increasingly a focus of botanical research. Despite the wide range of morphologies represented by pollen grains, to date there are few studies focused on the controls on pollen disparity and morphospace occupation, and fewer still considering these parameters in a phylogenetic framework. Here, we analyse morphospace occupation, disparity and rates of morphological evolution in Asterales pollen, in a phylogenetic context. We use a dataset comprising 113 taxa from across the Asterales phylogeny, with pollen morphology described using 28 discrete characters. The Asterales pollen morphospace is phylogenetically structured around groups of related taxa, consistent with punctuated bursts of morphological evolution at key points in the Asterales phylogeny. There is no substantial difference in disparity among these groups of taxa, despite large differences in species richness and biogeographic range. There is also mixed evidence for whole-genome duplication as a driver of Asterales pollen morphological evolution. Our results highlight the importance of evolutionary history for structuring pollen morphospace. Our study is consistent with others that have shown a decoupling of biodiversity parameters, and reinforces the need to focus on disparity as a key botanical metric in its own right.
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Affiliation(s)
- Phillip E Jardine
- Institute of Geology and Palaeontology, University of Münster, Münster, 48149, Germany
| | - Luis Palazzesi
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), C1405DJR, Buenos Aires, Argentina
- Sección Paleopalinología, Museo Argentino de Ciencias Naturales 'Bernardino Rivadavia', C1405DJR, Buenos Aires, Argentina
| | - M Cristina Tellería
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), C1405DJR, Buenos Aires, Argentina
- Laboratorio de Sistemática y Biología Evolutiva, Museo de La Plata, B1900FWA, La Plata, Argentina
| | - Viviana D Barreda
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), C1405DJR, Buenos Aires, Argentina
- Sección Paleopalinología, Museo Argentino de Ciencias Naturales 'Bernardino Rivadavia', C1405DJR, Buenos Aires, Argentina
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4
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Usma A, Ahmad M, Ramadan MF, Khan AM, Zafar M, Hamza M, Sultana S, Yaseen G. Micro-morphological diversity of pollen among Asteraceous taxa from Potohar Plateau-Pakistan. Microsc Res Tech 2022; 85:2467-2485. [PMID: 35294076 DOI: 10.1002/jemt.24102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Revised: 01/31/2022] [Accepted: 03/02/2022] [Indexed: 11/10/2022]
Abstract
Microscopic pollen characters from 19 species of family Asteraceae collected from different areas of the Potohar Plateau of Pakistan have been investigated using light and scanning electron microscopy. This study uses microscopic techniques to provide detailed information on pollen and its exine structure based on qualitative and quantitative characters. The present study has observed three types of pollen grains based on their apertures, that is, trizonocolporate, tetrazonocolporate, and tricolporate. Exine sculpturing is echinate in all studied taxa. Some species also exhibit Lacunae which differ in their shape and sizes. The size of the spines and the number of spines between the colpi play a vital role in differentiating the species of the same genus. Pollen fertility ranges from 94.3 to 74.19, showing that these species are well established in the study area. For the correct identification of species, a light and scanning electron microscopy was used that provides sufficient information for a taxonomist to distinguish species taxonomically.
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Affiliation(s)
- Anwer Usma
- Department of Plant Sciences, Quaid-i-Azam University, Islamabad, Pakistan
| | - Mushtaq Ahmad
- Department of Plant Sciences, Quaid-i-Azam University, Islamabad, Pakistan
| | | | - Amir Muhammad Khan
- Department of Botany, University of Mianwali, Mianwali, Pakistan.,Department of Botany, University of Sargodha, Sargodha, Pakistan
| | - Muhammad Zafar
- Department of Plant Sciences, Quaid-i-Azam University, Islamabad, Pakistan
| | - Mohammed Hamza
- Horticulture Department, Al-Azhar University, Cairo, Egypt
| | - Shazia Sultana
- Department of Plant Sciences, Quaid-i-Azam University, Islamabad, Pakistan
| | - Ghulam Yaseen
- Department of Plant Sciences, Quaid-i-Azam University, Islamabad, Pakistan.,Department of Botany, Division of Science and Technology, University of Education, Lahore, Pakistan
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5
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Nabila, Ahmad M, Zafar M, Bahadur S, Sultana S, Taj S, Celep F, Majeed S, Rozina. Palynomorphological diversity among the Asteraceous honeybee flora: An aid to the correct taxonomic identification using multiple microscopic techniques. Microsc Res Tech 2021; 85:570-590. [PMID: 34535944 DOI: 10.1002/jemt.23932] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Accepted: 08/29/2021] [Indexed: 12/11/2022]
Abstract
This study aimed to characterize the palynological morphology of melliferous species of family Asteraceae belonged to seven tribes which were categorized into 15 genera and were studied under light and scanning electron microscopy. The pollen grains were acetolyzed, measured, and described qualitatively. Quantitative data were analyzed by descriptive and multivariate statistical analysis. The species were analyzed considering 11 quantitative pollen characteristics. The study revealed that the pollen grains are circular, triangular, angular, semi-angular, quadrangular, pentagonal and hexagonal amb, and 3-colporate or 3-colpate. The size of the pollen is variable among the species, ranged from 56.1 to 23.2 μm. Three pollen types: oblate spheroidal (eight species), prolate spheroidal (six species), and suboblate (two species) were observed. The surface pattern of the exine varies from echinoperforate, echinate, echinate microperforate, fenestrate, echinoperforate reticulate, microreticulate, echinate perforate, tectate, and scabrate. Exine thickness was calculated minimum in Cichorium intybus (2.47 μm) and maximum in Taraxacum campylodes (5.15 μm). A key to studied bee floral species, based on the morphological features of pollen grains, is also provided. The palynomorphological characters here analyzed can be potentially used to correctly identify the Asteraceous honeybee floral species most commonly plants visited by honeybees in the study area.
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Affiliation(s)
- Nabila
- Department of Plant Sciences, Quaid-i-Azam University, Islamabad, Pakistan
| | - Mushtaq Ahmad
- Department of Plant Sciences, Quaid-i-Azam University, Islamabad, Pakistan
| | - Muhammad Zafar
- Department of Plant Sciences, Quaid-i-Azam University, Islamabad, Pakistan
| | - Saraj Bahadur
- College of Forestry, Hainan University, Haikou, China
| | - Shazia Sultana
- Department of Plant Sciences, Quaid-i-Azam University, Islamabad, Pakistan
| | - Sehrish Taj
- State Key Laboratory of Marine Resource Utilization in South China Sea, Haikou, China.,Hainan Provincial Key Laboratory for Tropical Hydrobiology and Biotechnology, Haikou, China.,Department of Aquaculture, Ocean College of Hainan University, Haikou, China
| | - Ferhat Celep
- Department of Biology, Faculty of Arts and Sciences, Kırıkkale University, Kırıkkale, Turkey
| | - Salman Majeed
- Department of Plant Sciences, Quaid-i-Azam University, Islamabad, Pakistan
| | - Rozina
- Department of Plant Sciences, Quaid-i-Azam University, Islamabad, Pakistan
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6
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Umber F, Zafar M, Ullah R, Bari A, Khan MY, Ahmad M, Sultana S. Implication of light and scanning electron microscopy for pollen morphology of selected taxa of family Asteraceae and Brassicaceae. Microsc Res Tech 2021; 85:373-384. [PMID: 34467586 DOI: 10.1002/jemt.23912] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Revised: 07/28/2021] [Accepted: 08/12/2021] [Indexed: 12/29/2022]
Abstract
The present study was intended to assess pollen morphological attributes of selected Asteraceous and Brassicaceous species from tehsil Esa Khel (Mianwali), Punjab using scanning electron microscopy (SEM) and light microscopy (LM) techniques for its systematic and taxonomic significance for correct identification. Pollen from 12 different species belongs to two plant families from various distributional localities were collected, acetolyzed and measured. Different palynomorphological features were investigated using LM and SEM techniques. In Asteraceous species, three types of pollen (tricolporate, trizonocolporate, and tetracolporate) were observed. Pollen shape was observed prolate-spheroidal in three species while oblate and oblate-spheroidal were detected in Parthenium hysterophorus and Erigeron bonariensis. While sculpturing pattern of exine were echinate, echinate fenestrate, echinate perforate and scabrate echinate. Mesocolpium measurement was calculated maximum for Sonchus oleraceous (16.6 μm). Brassicaceae pollen were circular, lobate, tricolpate and exine show reticulate peculiarities. Whereas dominant shape was oblate-spheroidal followed by prolate-spheroidal and sub-prolate in Lepidium didymum and Sisymbrium irio, respectively. Mesocolpium distance was noted highest in Raphanus raphanistrum (14.4 μm). Exine thickness was noted maximum in Erigeron bonariensis (2.9 μm) in Asteraceous species and in Brassicaceae; Lepedium didymum exine measurement was 2.7 μm. The study showed that pollen micromorphology has important role to accurately identify and classify diverse plants genera belong to different families. Based on these taxonomic palynomorph features, the accurate identification of species from flora of tehsil Esa Khel, Mianwali were elaborated.
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Affiliation(s)
- Faria Umber
- Department of Plant Sciences, Quaid-i-Azam University, Islamabad, Pakistan
| | - Muhammad Zafar
- Department of Plant Sciences, Quaid-i-Azam University, Islamabad, Pakistan
| | - Riaz Ullah
- Department of Pharmacognosy, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Ahmed Bari
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | | | - Mushtaq Ahmad
- Department of Plant Sciences, Quaid-i-Azam University, Islamabad, Pakistan.,Pakistan Academy of Sciences, Islamabad, Pakistan
| | - Shazia Sultana
- Department of Plant Sciences, Quaid-i-Azam University, Islamabad, Pakistan
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7
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Inchaussandague M, Skigin D, Dolinko A, Tellería MC, Barreda V, Palazzesi L. Spines, microspines and electric fields: a new look at the possible significance of sculpture in pollen of basal and derived Asteraceae. Biol J Linn Soc Lond 2018. [DOI: 10.1093/biolinnean/bly171] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Affiliation(s)
- Marina Inchaussandague
- Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Departamento de Física, Grupo de Electromagnetismo Aplicado, Ciudad Universitaria, Pabellón, Argentina
- CONICET—Universidad de Buenos Aires, Instituto de Física de Buenos Aires (IFIBA), Ciudad Universitaria, Pabellón, Argentina
| | - Diana Skigin
- Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Departamento de Física, Grupo de Electromagnetismo Aplicado, Ciudad Universitaria, Pabellón, Argentina
- CONICET—Universidad de Buenos Aires, Instituto de Física de Buenos Aires (IFIBA), Ciudad Universitaria, Pabellón, Argentina
| | - Andrés Dolinko
- Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Departamento de Biodiversidad y Biología Experimental, Ciudad Universitaria, Pabellón, Argentina
- CONICET, Consejo Nacional de Investigaciones Científicas y Técnicas, Argentina
| | - María C Tellería
- CONICET, Consejo Nacional de Investigaciones Científicas y Técnicas, Argentina
- Laboratorio de Sistemática y Biología Evolutiva, Museo de La Plata, Paseo del Bosque s/n°, La Plata, Buenos Aires, Argentina
| | - Viviana Barreda
- CONICET, Consejo Nacional de Investigaciones Científicas y Técnicas, Argentina
- Sección Paleopalinología, División Paleobotánica, Museo Argentino de Ciencias Naturales, Buenos Aires, Argentina
| | - Luis Palazzesi
- CONICET, Consejo Nacional de Investigaciones Científicas y Técnicas, Argentina
- Sección Paleopalinología, División Paleobotánica, Museo Argentino de Ciencias Naturales, Buenos Aires, Argentina
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