ArticlePlant signaling & behavior2014
The plant stigma exudate: a biochemically active extracellular environment for pollen germination?
Article in Plant signaling & behavior, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers.
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Who cites it
14 citing papers in PubMed, 36 citations in OpenAlex.
- Diversity and sources of floral microbial communities.Applied and environmental microbiology · 2026Review
- Fungus-mediated plant-pollinator mutualism in Monoon laui (Annonaceae): functional differentiation of stigmatic exudate and petal nectar.BMC biology · 2025Article
- Pollen viability, longevity, and function in angiosperms: key drivers and prospects for improvement.Plant reproduction · 2024Review
- Discovery of microRNAs inPNAS nexus · 2023Article
- Stigmas of holoparasitic Phelipanche arenaria (Orobanchaceae) - a suitable ephemeric flower habitat for development unique microbiome.BMC plant biology · 2023Article
- Plant Hormone and Fatty Acid Screening ofBiomolecules · 2023Article
- Interspecies and temporal dynamics of bacterial and fungal microbiomes of pistil stigmas in flowers in holoparasitic plants of the Orobanche series Alsaticae (Orobanchaceae).Scientific reports · 2023Article
- Exploration of molecular mechanism of intraspecific cross-incompatibility in sweetpotato by transcriptome and metabolome analysis.Plant molecular biology · 2022Article
- The Balance between Different ROS on Tobacco Stigma during Flowering and Its Role in Pollen Germination.Plants (Basel, Switzerland) · 2022Article
- A Compendium ofFrontiers in plant science · 2021Article
- Attachment-based mechanisms underlying capture and release of pollen grains.Journal of the Royal Society, Interface · 2019Article
- Stigmatic exudate in the Annonaceae: Pollinator reward, pollen germination medium or extragynoecial compitum?Journal of integrative plant biology · 2017Article
- Pollen tube access to the ovule is mediated by glycoprotein secretion on the obturator of apple (Malus × domestica, Borkh).Annals of botany · 2017Article
- Identification and Functional Annotation of Genes Differentially Expressed in the Reproductive Tissues of the Olive Tree (Frontiers in plant science · 2017Article
Corrections and comments
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Authors and funding
9 authors at 6 institutions in 3 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
During sexual reproduction, pollen performance is greatly influenced by the female tissues. The stigma exudate, i.e., the extracellular secretion that covers the stigma outermost surface, has been usually regarded as a reservoir of water, secondary metabolites, cell wall precursors and compounds that serve as energy supply for rapid pollen tube growth. In an attempt to identify the proteins present in the stigma secretome, we performed a large-scale analysis in two species (Lilium longiflorum and Olea europaea) following a proteomic-based approach. The resulting data strongly suggest that the stigma exudate is not a mere storage site but also a biochemically active environment with a markedly catabolic nature. Thus, this secretion may modulate early pollen tube growth and contribute to the senescence of stigma after pollination. In addition, a putative cross-talk between genetic programs that regulate stress/defense and pollination responses in the stigma is also suggested. The stigma exudate might also functionally diverge between species on the basis on their ecology and the biochemical, morphological and anatomical features of their stigmas. Unexpectedly, we identified in both exudates some intracellular proteins, suggesting that a mechanism other than the canonical ER-Golgi exocytic pathway may exist in the stigma and contribute to exudate secretion.
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