Andromonoecy and Variation in Phenotypic Gender of Passiflora Incarnata (Passifloraceae)

May, Peter G.; Spears, E. Eugene

doi:10.2307/2444737

Cited by 16 publications

(22 citation statements)

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“…Passiflora incarnata (Passifloraceae) is a perennial, self‐incompatible vine that grows throughout the south‐eastern United States (May & Spears, ). It blooms from July to September in central Virginia, and its primary pollinator is the common carpenter bee ( Xylocopa virginica ).…”

Section: Methodsmentioning

confidence: 99%

“…This is even more likely in P. incarnata because a single flower per plant is open daily and population sizes are typically large. Passiflora incarnata is functionally andromonoecious with both male (staminate) and hermaphroditic flowers on the same plant (May & Spears, ; Dai & Galloway, ). However, only hermaphroditic flowers were included in experiments discussed here, and the ecological manipulations had no effect on the proportion of male flowers per plant (C. Dai, unpublished).…”

Section: Methodsmentioning

confidence: 99%

“…Rhizomes of P. incarnata were collected from Virginia, South Carolina, Georgia and Florida, in March 2009. At each population, rhizomes from one to 13 genotypes were collected at 10‐m intervals to avoid resampling the same plant (May & Spears, ). Passiflora incarnata is a common species in the south‐eastern USA, and most of the plants were collected on roadsides or abandoned fields.…”

Section: Methodsmentioning

confidence: 99%

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Sexual selection in a hermaphroditic plant through female reproductive success

Dai

Galloway

2013

J of Evolutionary Biology

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Sexual selection is well accepted as a mechanism of shaping traits in animals. However, whether and how floral traits are sexually selected in hermaphroditic plants remains less clear. Here, we use Passiflora incarnata to address how floral traits that affect pollination success are selected via female function. We manipulated the ecological context by limiting pollination and adding resources to expand the phenotypic distribution and alter the intensity of sexual selection. Total sexual selection favoured lower style deflexion because of its impact on pollen receipt and subsequent seed number. However, total selection on style deflexion was not significant, indicating additional selection on style deflexion through routes other than mating. Limited pollination and enhanced resources were expected to alter the distribution of pollen deposition and seed production and therefore intensify the Bateman gradient -the relationship between pollen receipt and seed production. Indeed, the Bateman gradient was strongest when pollination was limited, suggesting potential for sexual selection to influence floral trait evolution under these conditions. Overall, we found floral traits may be shaped by sexual selection through female reproductive success in this hermaphroditic plant. These results support manipulations to enhance the variance in mating as a mechanism to understand patterns of sexual selection.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Sexual selection in a hermaphroditic plant through female reproductive success

Dai

Galloway

2013

J of Evolutionary Biology

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“…The proportions of each kinds of flowers vary among different individuals and populations of andromonoecious species (Stephenson 1979;Primack and Lloyd 1980;May and Spears 1988;Anderson 1990;Diggle 1991Diggle , 1993Diggle , 1994Narbona et al 2002). This variation stems from ecological factors (Solomon 1985) and resource availability (Stephenson 1979;Diggle 1991;Narbona et al 2002).…”

Section: Introductionmentioning

confidence: 99%

Floral phenology in relation to pollination and reproductive output in Commelina caroliniana (Commelinaceae)

Kaul

Koul

2008

Aust. J. Bot.

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Abstract. Commelina carolinianaWalter is an andromonoecious rainy-season weed. It bears staminate and hermaphrodite flowers in spathes. In some spathes, structurally hermaphrodite flowers of the third and fourth orders function either as male or female. The flowers are structured for cross-pollination. Events of floral biology suggest weak protandry which also contributes to cross-pollination. Large numbers of hymenopterans (nine species) visited the flowers and transferred pollen to stigmas. Whenever cross-pollination failed, selfing took over. Auto-fertility and self-compatibility indices revealed that the plants were self-compatible. Only some flowers of the third and fourth orders within a spathe were partially self-compatible. These facts notwithstanding, manual cross-pollination of flowers yields increased fruit and seed set.

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“…First, they probably evolved from hermaphroditic ancestors, either by losing pistils from some flowers (Lewis, 1942;Bertin, 1982b;Whalen and Costich, 1986), or by adding staminate flowers (Anderson and Symon, 1989). For example, male flowers are typically produced after hermaphrodites (Lovett Doust, 1980;Primack and Lloyd, 1980; Thomson and Barrett, 1981;Webb, 1981;Bertin, 1982a;Solomon, 1985;Pellmyr, 1986;Whalen and Costich, 1986;May and Spears, 1988;Diggle, 1991), and one must consider why other temporal patterns are much less common. Second, they have achieved this increase by a particular gamete packaging strategy, which can be contrasted with other possible strategies (Primack and Lloyd, 1980;Spalik, 1991).…”

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confidence: 99%

Temporal Patterns of Seed Set and Decelerating Fitness Returns on Female Allocation in Zigadenus paniculatus (Liliaceae), An Andromonoecious Lily

Emms¹

1996

American Journal of Botany

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JSTOR is a not-for-profit service that helps scholars, researchers, and students discover, use, and build upon a wide range of content in a trusted digital archive. We use information technology and tools to increase productivity and facilitate new forms of scholarship. For more information about JSTOR, please contact support@jstor.org.I describe temporal patterns of seed production in the andromonoecious lily Zigadenus paniculatus. Fruit set per flower and seed set per fruit declined through time within plants. Hand pollination experiments showed that this was not due to increasing pollen limitation. Nutrient supplementation had little effect on seed output, but leaf clipping reduced seed production, especially in late-blooming flowers, and removal of early-blooming flowers increased seed set by later flowers. Thus, the temporal pattern of seed output was due to declining availability of photosynthates. Plants with larger bulbs produced larger inflorescences, a greater proportion of hermaphrodite flowers, more fruits per hermaphrodite flower, and more seeds per fruit, but lost a greater fraction of their initial bulb mass as a consequence of fruiting. After controlling for the effects of bulb mass, plants with larger inflorescences produced a greater proportion of male flowers, and plants with more hermaphrodite flowers produced fewer fruits per hermaphrodite flower and fewer seeds per fruit. Thus, the female fitness gain curve was decelerating. The temporal decline in seed output provides a partial explanation for the parallel decline in allocation to pistils. However, a complete explanation for the pattern of gamete packaging requires an understanding of factors controlling male, as well as female, fitness.

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Andromonoecy and Variation in Phenotypic Gender of Passiflora Incarnata (Passifloraceae)

Cited by 16 publications

References 0 publications

Sexual selection in a hermaphroditic plant through female reproductive success

Sexual selection in a hermaphroditic plant through female reproductive success

Floral phenology in relation to pollination and reproductive output in Commelina caroliniana (Commelinaceae)

Temporal Patterns of Seed Set and Decelerating Fitness Returns on Female Allocation in Zigadenus paniculatus (Liliaceae), An Andromonoecious Lily

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