Effects of herbivores and pollinators on fruit yield and survival in a cleistogamous herb

Munguía-Rosas, Miguel A.; Arias, Luna Valentina Angulo; Jurado-Dzib, Selmy G.; Mezeta-Cob, Candy R.; Parra-Tabla, Vı́ctor

doi:10.1007/s11258-015-0455-y

Cited by 10 publications

(9 citation statements)

References 41 publications

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“…; Munguía‐Rosas et al . , ). In contrast to the model of Schoen & Lloyd (), our results suggest that the breeding system of this species responds to high pollination environments by shifting allocation towards CL flowers.…”

Section: Discussionmentioning

confidence: 99%

The role of phenotypic plasticity and pollination environment in the cleistogamous, mixed mating breeding system of Triodanis perfoliata

2018

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The role of variable pollination environments in maintaining mixed mating systems is an active area of research. Dimorphic cleistogamy, in which a plant reproduces by both open, facultative outcrossing chasmogamous (CH) flowers and closed, cleistogamous (CL) flowers presents an excellent opportunity to study mixed mating. For example, plastic responses in allocation to an optimal floral type could serve as an adaptive strategy that maintains mixed mating under variable pollination environments. We tested for pollen limitation and plastic responses in allocation to different floral types under manipulated pollination conditions in the dimorphic cleistogamous, mixed mating annual, Triodanis perfoliata. Using a field population, we quantified pollen limitation, auto-fertility and plastic responses in the breeding system by measuring allocation to flower number and seed set of floral types. We found no evidence for pollen limitation for CH flowers, and CH flowers had low efficacy of autonomous selfing. Importantly, we found that T. perfoliata alters floral number following changes in pollination conditions, with pollen-supplemented plants having lower relative CH flower number than non-supplemented plants. Breeding system plasticity may allow for benefits from outcrossing through CH flowers, but also increased overall fitness through relatively cheap CL reproduction. After CH flowers receive pollen, subsequent production of CH flowers was reduced, which may be due to resource limitation. Our findings did not support a theoretical model predicting increased CH flowers with high pollination levels. These results increase our understanding of the role of pollination services and resource allocation in the maintenance of mixed mating systems, which also warrants further investigation.

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Section: Discussionmentioning

confidence: 99%

The role of phenotypic plasticity and pollination environment in the cleistogamous, mixed mating breeding system of Triodanis perfoliata

2018

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“…Plant size has been shown to be a limiting factor for reproductive effort (Jasieniuk and Lechowicz 1987; Diaz and MacNair 1998; Munguía-Rosas et al 2015) with some studies demonstrating that manipulations of above-ground vegetation can significantly reduce CL alone (Diaz and MacNair 1998) or both floral morphs (Munguía-Rosas et al 2015). Resource limitations that negatively impact CL may be induced by environmental stresses such as soil moisture or soil fertility gradients (Schoen and Lloyd 1984; Bell and Quinn 1987; Albert et al 2011).…”

Section: Discussionmentioning

confidence: 99%

Patterns of chasmogamy and cleistogamy, a mixed-mating strategy in an endangered perennial

et al. 2017

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Our research explores patterns of mixed-mating in the endemic, federally listed Polygala lewtonii. This perennial herb has open-pollinated chasmogamous flowers and self-pollinated cleistogamous flowers on both above- and below-ground stems. Data collected from 2008 - 2012 shows temporal separation of chasmogamy (January to May) and cleistogamy (June to February) with little overlap. A quarter of plants flowered all three flower morphs at least once during their lifespan while slightly less than half produced chasmogamous and above-ground cleistogamous flowers but no below-ground structures. Estimated fruit maturation was found to be seven times greater for chasmogamy compared to both forms of cleistogamy.

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“…We could, however, not detect any sign of altered flower visitation behaviour across pest control treatments, indicating that this potential mechanism (M1) did not play a significant role in explaining the pronounced synergistic effects found in our study. Another possible pathway driving synergistic pollinationpest control interactions involves compensatory responses of plants to florivory (M2) [20]. If over-compensation had contributed to the observed synergistic pollination-pest control interactions, either the number of shoots or the number of fruits produced per shoot should have increased with pest levels or plant damage levels, resulting in overall higher yields.…”

Section: Discussionmentioning

confidence: 99%

“…Here, we test three hypothetical mechanisms (M1-M3). Such effects could arise where alterations in the attractiveness of crop plants to pollinators-through changes in floral traits or direct repellence of pollinators by florivorous pests-reduce flower visitation and thereby pollination services [19] (M1); through compensatory responses of crops to herbivory by pests, such as compensatory growth [20] or even over-compensation [21] resulting in overall higher yields (M2). A further potentially important, but to our knowledge unexplored, synergistic effect of pollination and control of florivorous pests may act via florivorous pest-induced changes in flower lifetime (M3).…”

Section: Introductionmentioning

confidence: 99%

Synergistic interactions of ecosystem services: florivorous pest control boosts crop yield increase through insect pollination

Sutter

Albrecht

2016

Proc. R. Soc. B.

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Insect pollination and pest control are pivotal functions sustaining global food production. However, they have mostly been studied in isolation and how they interactively shape crop yield remains largely unexplored. Using controlled field experiments, we found strong synergistic effects of insect pollination and simulated pest control on yield quantity and quality. Their joint effect increased yield by 23%, with synergistic effects contributing 10%, while their single contributions were 7% and 6%, respectively. The potential economic benefit for a farmer from the synergistic effects (12%) was 1.8 times greater than their individual contributions (7% each). We show that the principal underlying mechanism was a pronounced pestinduced reduction in flower lifetime, resulting in a strong reduction in the number of pollinator visits a flower receives during its lifetime. Our findings highlight the importance of non-additive interactions among ecosystem services (ES) when valuating, mapping or predicting them and reveal fundamental implications for ecosystem management and policy aimed at maximizing ES for sustainable agriculture.

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Effects of herbivores and pollinators on fruit yield and survival in a cleistogamous herb

Cited by 10 publications

References 41 publications

The role of phenotypic plasticity and pollination environment in the cleistogamous, mixed mating breeding system of Triodanis perfoliata

The role of phenotypic plasticity and pollination environment in the cleistogamous, mixed mating breeding system of Triodanis perfoliata

Patterns of chasmogamy and cleistogamy, a mixed-mating strategy in an endangered perennial

Synergistic interactions of ecosystem services: florivorous pest control boosts crop yield increase through insect pollination

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