Revisiting pollination mode in chestnut (<i>Castanea spp</i>.): an integrated approach

Larue, Clément; Austruy, Eva; Basset, Gaëlle; Petit, Rémy J.

doi:10.1080/23818107.2021.1872041

Cited by 32 publications

(50 citation statements)

References 93 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The benefit of animal-mediated “pollination” may be particularly important in species such as G. gracilis with funnel-shaped trichogynes that do not protrude from the surface of the thallus ( 16 ), making fertilization more difficult compared with that of other Rhodophyta such as Bostrychia moritziana ( 17 ), which have elongated trichogyne (about 100 μm long). As in flowering plants in which ambophily (adaptation to both wind and animal pollination) appears to be more important than previously reported ( 18 ), our results demonstrate that in addition to the well-established role of water movement ( 7 , 9 , 10 ), animal-mediated fertilization is also present in the sea. This observation opens up new unexplored avenues of research aimed at understanding the ecology of these interactions.…”

supporting

confidence: 72%

Pollinators of the sea: A discovery of animal-mediated fertilization in seaweed

Lavaut

Guillemin

Colin

et al. 2022

Science

View full text Add to dashboard Cite

The long-held belief that animal-mediated pollination is absent in the sea has recently been contradicted in seagrasses, motivating investigations of other marine phyla. This is particularly relevant in red algae, in which female gametes are not liberated and male gametes are not flagellated. Using experiments with the isopod Idotea balthica and the red alga Gracilaria gracilis , we demonstrate that biotic interactions dramatically increase the fertilization success of the alga through animal transport of spermatia on their body. This discovery suggests that animal-mediated fertilization could have evolved independently in terrestrial and marine environments and raises the possibility of its emergence in the sea before plants moved ashore.

show abstract

supporting

confidence: 72%

Pollinators of the sea: A discovery of animal-mediated fertilization in seaweed

Lavaut

Guillemin

Colin

et al. 2022

Science

View full text Add to dashboard Cite

show abstract

“…(Larue et al 2021a; Petit and Larue 2022). Chestnut trees are characterized by massive blooming, huge pollen production and the largest pollen:ovule ratio ever reported in plants (Larue et al 2021a). They are characterized by multiple and complex mechanisms that limit self-pollination (Xiong et al 2019; Larue et al 2022).…”

Section: Methodsmentioning

confidence: 99%

“…It causes anomalies to male staminate flowers, ranging from male flowers with fully aborted stamens to flowers with short stamen filaments that produce scarce amounts of mostly non-functional pollen (Bounous et al 1992). Interestingly, the corresponding male-sterile catkins continue to produce nectar and attract insects (Larue et al 2021a). Chestnut trees should be good models to study female advantage.…”

Section: Methodsmentioning

confidence: 99%

Harmful self-pollination drives gynodioecy in European chestnut, a self-incompatible tree

Larue

Petit

2022

Preprint

Self Cite

View full text Add to dashboard Cite

Background and Aim: In gynodioecious plants, male-sterile individuals must have a female advantage to coexist with bisexual individuals. In European chestnuts, characterized by a form of late-acting self-incompatibility, male-fertile trees produce large amounts of pollen when female flowers are receptive, resulting in abundant self-pollination. Here we study whether male-sterile chestnut trees have an increased fruit set compared to male-fertile trees because they escape from the negative consequences of self-pollination on ovules, a case of self-interference. Methods: We measured fruit set of 242 male-fertile and male-sterile trees during three consecutive years. To test experimentally the hypothesis of negative interference of self-pollen on ovules as the origin of the female advantage of male-sterile trees, we emasculated male-fertile trees and compared their fruit set with that of control male-fertile trees. We performed the same experiment on male-sterile trees by removing the sterile but rewarding male catkins as a natural control to test for the effect of decreased insect attractiveness on fruit set. Key Results: The fruit set of male-sterile trees is higher than that of male-fertile trees by a factor of two in some years. Following emasculation, male-fertile trees have a higher fruit set than control male-fertile trees, pointing to a negative effect of the massive amount of self-pollen produced by fertile male catkins on fertilization probability of female flowers. In contrast, emasculated male-sterile trees had a lower fruit set than control male-sterile trees, pointing to a decrease in insect attractiveness after removing nectar-producing male catkins. Conclusions: Our emasculation experiment showed that sexual interference results in massive ovule discounting in male-fertile trees, sufficient for accounting for the persistence of female trees in natural populations of European chestnut trees.

show abstract

“…In the chestnut (Castanea Mill. (Fagaceae)), female flowers have erect styles resembling stamens from male flowers; this is a probable case of intersexual mimicry [85]. Thien et al [86] suggested that Amborella is another case of automimicry (Box 2), as function-ally female flowers mimic male flowers to attract pollen-feeding insects.…”

Section: Expression Of Gendermentioning

confidence: 99%

Development and Evolution of Unisexual Flowers: A Review

Jabbour

Espinosa²,

Dejonghe

et al. 2022

Plants

View full text Add to dashboard Cite

The development of unisexual flowers has been described in a large number of taxa, sampling the diversity of floral phenotypes and sexual systems observed in extant angiosperms, in studies focusing on floral ontogeny, on the evo-devo of unisexuality, or on the genetic and chromosomal bases of unisexuality. We review here such developmental studies, aiming at characterizing the diversity of ontogenic pathways leading to functionally unisexual flowers. In addition, we present for the first time and in a two-dimensional morphospace a quantitative description of the developmental rate of the sexual organs in functionally unisexual flowers, in a non-exhaustive sampling of angiosperms with contrasted floral morphologies. Eventually, recommendations are provided to help plant evo-devo researchers and botanists addressing macroevolutionary and ecological issues to more precisely select the taxa, the biological material, or the developmental stages to be investigated.

show abstract

Revisiting pollination mode in chestnut (Castanea spp.): an integrated approach

Cited by 32 publications

References 93 publications

Pollinators of the sea: A discovery of animal-mediated fertilization in seaweed

Pollinators of the sea: A discovery of animal-mediated fertilization in seaweed

Harmful self-pollination drives gynodioecy in European chestnut, a self-incompatible tree

Development and Evolution of Unisexual Flowers: A Review

Contact Info

Product

Resources

About