A comparative study on the reproductive success of two rewarding Habenaria species (Orchidaceae) occurring in roadside verge habitats

Zhang, Wenliu; Gao, Jiang-Yun

doi:10.1186/s12870-021-02968-w

Cited by 6 publications

(7 citation statements)

References 46 publications

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“…It is distributed widely from temperate to tropical regions, although Brazil, southern and central Africa, and eastern Asia are the centers of diversity ( Kurzweil and Weber, 1992 ; Batista et al, 2006 , 2013 ). In many regions, Habenaria species with different genetic alliances occur sympatric and with overlapping flowering periods from summer to autumn ( Pedron et al, 2012 ; Zhang and Gao, 2021 ). Therefore, Habenaria spp.…”

Section: Introductionmentioning

confidence: 99%

“…are ideal for evaluating the importance of pre- versus post-pollination barriers since much is known about the pollination biology and breeding systems in this genus from previous studies mainly focusing on single species ( Singer et al, 2007 ; Peter et al, 2009 ; Tao et al, 2018a ; Xiong et al, 2019 ; Chen et al, 2021 ), but the mechanisms allowing the maintenance of their co-existence are not well understood. Only a few studies have documented interspecific isolation mechanisms, and none quantified the relative contribution of pre- or post-pollination factors in this species-rich orchid genus ( Zhang and Gao, 2017 , 2021 ).…”

Section: Introductionmentioning

confidence: 99%

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Reproductive Isolation Among Three Nocturnal Moth-Pollinated Sympatric Habenaria Species (Orchidaceae)

et al. 2022

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Comparison and quantification of multiple pre- and post-pollination barriers to interspecific hybridization are important to understand the factors promoting reproductive isolation. Such isolating factors have been studied recently in many flowering plant species which seek after the general roles and relative strengths of different pre- and post-pollination barriers. In this study, we quantified six isolating factors (ecogeographic isolation, phenological isolation, pollinator isolation, pollinia-pistil interactions, fruit production, and seed development) that could possibly be acting as reproductive barriers at different stages among three sympatric Habenaria species (H. limprichtii, H. davidii, and H. delavayi). These three species overlap geographically but occupy different microhabitats varying in soil water content. They were isolated through pollinator interactions both ethologically (pollinator preference) and mechanically (pollinia attachment site), but to a variable degree for different species pairs. Interspecific crosses between H. limprichtii and H. davidii result in high fruit set, and embryo development suggested weak post-pollination barriers, whereas bidirectional crosses of H. delavayi with either of the other two species fail to produce fruits. Our results revealed that pollinators were the most important isolating barrier including both ethological and mechanical mechanisms, to maintain the boundaries among these three sympatric Habenaria species. Our study also highlights the importance of a combination of pre-and post-pollination barriers for species co-existence in Orchidaceae.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Reproductive Isolation Among Three Nocturnal Moth-Pollinated Sympatric Habenaria Species (Orchidaceae)

et al. 2022

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“…2010 ; Pellegrino et al 2010 ; Claessens and Kleynen 2011 ; Capó et al 2021 ) or colour dimorphic orchids ( Pellegrino et al 2008 ; Sonne and Hauser 2014 ; Jersáková et al 2015 ). High fruit set values (above 50 up to 80 %) have been reported in natural populations of rewarding orchids ( Meekers and Honnay 2011 ; Joffard et al 2020 ; Zhang and Gao 2021 ). This low level of fruit set is due to the very low pollinator visitation rates that deceptive orchid inflorescences usually experience compared to rewarding orchids ( Harder and Aizen 2010 ).…”

Section: Discussionmentioning

confidence: 90%

Pollination mechanism inSerapiaswith no pollinaria reconfiguration

2023

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Orchidaceae, one of the most numerous families in the world's flora, have evolved various pollination strategies to favour cross-pollination, such as deceptive pollination and pollinarium reconfiguration. Among the terrestrial orchids of the Mediterranean, only species belonging to the genus Serapias show a strategy defined as shelter imitation. The floral elements form a tubular structure that insects use during their resting phases. The purpose of this paper was to clarify the mechanisms that guarantee pollination with particular attention to the morphological interactions between orchids and pollinators and whether pollinaria reconfiguration is necessary in the promotion of cross-pollination in Serapias. Breeding system experiments and hand pollination treatments indicated that Serapias was highly self-compatible, shows low value of natural fruit set and is pollinator limited. Time-lapse photos showed that the pollinarium had no refolding of the stipe or caudicle after its removal from the flower. The morphology of the flower determined the attack of the pollinarium on the occiput/vertex of insect. When the insect left the flower, the pollinarium was unable to encounter the stigma. When the insect made a second visit to another flower, the pollen masses of the first pollinarium ended up on the stigma and at the same time, the insect picked up a second pollinarium. Our observations and analyses suggested that morphological interactions between flower and pollinator are crucial to the success of pollination and to prevent self-pollination and thus that pollinarium reconfiguration is unnecessary in shelter deceptive orchids, such as Serapias species, for the promotion of crosspollination. Serapias represent a case of interactions between plant and pollinator; the formation of the tubular shape of the flower is an essential preadaptation for the development of resting site mimicry originating exclusively in Serapias among Mediterranean orchids.

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“…The low fruit set can affect plant species' reproductive success. They are affected by the small population, weather activities, climate, pollination mechanism, the morphology of flowers, abundance, and pollinator behavior (Racsko et al 2007;Cao et al 2015;Singh et al 2018;Graves and Gimondo 2021;Zhang and Gao 2021).…”

Section: Discussionmentioning

confidence: 99%

Flowering and fruiting phenology of Anaxagorea luzonensis A. Gray (Annonaceae)

Lestari¹,

NINGRUM²,

NADA

et al. 2023

Biodiversitas

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Abstract. Lestari DA, Ningrum LW, Nada FMH, Pradipta NN, Harsono DR. 2023. Flowering and fruiting phenology of Anaxagorea luzonensis A. Gray (Annonaceae). Biodiversitas 24: 784-792. Anaxagorea luzonensis is one of the critical plant collections from the Annonaceae family, with only one specimen in Purwodadi Botanic Garden (PBG). In protecting these plants, it is necessary to know the process of flowering and fruiting through the phenological process. This research is expected to observe plant propagation, physiology, environmental response, and increased reproductive success. The aim of this research is to know the details of flowering and fruiting phenology stages, determine reproductive success, and explain the floral biology of A. luzonensis. Research on the flowering and fruiting phenology of A. luzonensis was carried out from December 2021 – November 2022 in one season at PBG. The method is observative, including changes in color, shape, and size of flowers and fruit in each phenological stage. In addition, the method includes the count of reproductive success and observation of the A. luzonensis flower. This study's results stated that the flowering and fruiting phenology of A. luzonensis experienced a shorter flowering time than fruiting time and a low percentage (<30%) of reproductive success. Flowering stages are divided into five stages, i.e. initiation, flower bud, before bloom, bloom, and anthesis; fruiting stages are divided into three stages, i.e. immature-sized, mature-sized, and ripe fruit, which occurred in period 73-121 ± 85 days. Environmental and genetic factors cause the low value of reproductive success. This research can be useful for the conservation strategy of A. luzonensis, especially for reproduction biology and seed conservation.

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A comparative study on the reproductive success of two rewarding Habenaria species (Orchidaceae) occurring in roadside verge habitats

Cited by 6 publications

References 46 publications

Reproductive Isolation Among Three Nocturnal Moth-Pollinated Sympatric Habenaria Species (Orchidaceae)

Reproductive Isolation Among Three Nocturnal Moth-Pollinated Sympatric Habenaria Species (Orchidaceae)

Pollination mechanism inSerapiaswith no pollinaria reconfiguration

Flowering and fruiting phenology of Anaxagorea luzonensis A. Gray (Annonaceae)

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