{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,7]],"date-time":"2026-10-07T21:51:09Z","timestamp":1791409869480,"version":"4.3.3"},"reference-count":0,"publisher":"Oxford University Press (OUP)","license":[{"start":{"date-parts":[[2026,10,7]],"date-time":"2026-10-07T00:00:00Z","timestamp":1791331200000},"content-version":"am","delay-in-days":0,"URL":"https:\/\/academic.oup.com\/pages\/standard-publication-reuse-rights"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"abstract":"Abstract<\/jats:title>\n \n Background and Aims<\/jats:title>\n The diversity of secretory structures in Lythraceae remains poorly understood. We thus present a comprehensive morphoanatomical description of vegetative and reproductive glands in Cuphea melvilla to address fundamental questions about their secretions and functions.<\/jats:p>\n <\/jats:sec>\n \n Methods<\/jats:title>\n Buds, leaves and flowers of C. melvilla were sampled from floodplain habitats in the Brazilian Amazon. Field observations of visitors were conducted, and seven distinct gland types were characterized using light and scanning electron microscopy alongside comprehensive histochemical testing of glandular tissues and exudates.<\/jats:p>\n <\/jats:sec>\n \n Key Results<\/jats:title>\n An unexpected diversity of secretory structures was identified within C. melvilla. Conical colleters occur at both vegetative and reproductive shoot apical meristems, exhibiting a novel pattern consisting of a central secretory axis enclosed by a non-secretory epidermis. The yellow spots on the leaves are epithemal hydathodes, and the epicalyx revealed the unprecedented discovery of floral hydathodes associated with non-vascularized glandular projections. Additionally, the floral spur exhibits a vascularized nectary. Four main functional roles are proposed: (i) leaf and floral hydathodes mediate water homeostasis via guttation\/absorption; (ii) colleters produce a predominantly mucilaginous exudate that protects developing leaves and flowers from desiccation and pathogen invasion; (iii) an oleoresinous, sticky secretion from floral glandular projections helps in defense against herbivores and facilitates pollen adhesion; and (iv) the floral nectary produces a sugary, aromatic nectar as hummingbirds reward.<\/jats:p>\n <\/jats:sec>\n \n Conclusions<\/jats:title>\n The remarkable diversity of secretory structures in C. melvilla \u2013 most notably the first report of colleters in Lythraceae and of floral hydathodes in angiosperm \u2013 underscores the need for a broader reassessment of anatomy descriptions across the family. These secretory structures revealed unprecedented morphoanatomical and functional evidence that expand significantly the understanding of ecological adaptation within the family, and likely play pivotal roles in mediating plant\u2013animal interactions and aiding survival during seasonal drought and flooding regimes in Amazon wetlands.<\/jats:p>\n <\/jats:sec>","DOI":"10.1093\/aob\/mcag320","type":"journal-article","created":{"date-parts":[[2026,10,6]],"date-time":"2026-10-06T11:40:00Z","timestamp":1791286800000},"source":"Crossref","is-referenced-by-count":0,"title":["Glands up! Novel Secretory Structures from Cuphea melvilla in Amazon Floodplain and Paradigm Shifts of their Functional Implications"],"prefix":"10.1093","author":[{"ORCID":"https:\/\/orcid.org\/0009-0001-9057-976X","authenticated-orcid":false,"given":"Adriele Ara\u00fajo","family":"Lever","sequence":"first","affiliation":[{"name":"Programa de P\u00f3s-Gradua\u00e7\u00e3o em Ci\u00eancias, Tecnologia e Sa\u00fade, Universidade Federal do Amazonas, Instituto de Ci\u00eancias Exatas e Tecnologia , Rua Nossa Senhora do Ros\u00e1rio, 3863, Tiradentes, Itacoatiara, Amazonas, 69100-000 ,","place":["Brazil"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Val\u00e9ria Ferreira","family":"Fernandes","sequence":"additional","affiliation":[{"name":"Programa de P\u00f3s-Gradua\u00e7\u00e3o em Bot\u00e2nica, Departamento de Biologia Vegetal, Universidade Federal de Vi\u00e7osa , Av. P.H. Rolfs, s\/n, Campus Universit\u00e1rio, Vi\u00e7osa, Minas Gerais, 36570-000 ,","place":["Brazil"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2240-3498","authenticated-orcid":false,"given":"Renata Maria Strozi Alves","family":"Meira","sequence":"additional","affiliation":[{"name":"Programa de P\u00f3s-Gradua\u00e7\u00e3o em Bot\u00e2nica, Departamento de Biologia Vegetal, Universidade Federal de Vi\u00e7osa , Av. P.H. Rolfs, s\/n, Campus Universit\u00e1rio, Vi\u00e7osa, Minas Gerais, 36570-000 ,","place":["Brazil"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Isabel Reis","family":"Guesdon","sequence":"additional","affiliation":[{"name":"Programa de P\u00f3s-Gradua\u00e7\u00e3o em Ci\u00eancias, Tecnologia e Sa\u00fade, Universidade Federal do Amazonas, Instituto de Ci\u00eancias Exatas e Tecnologia , Rua Nossa Senhora do Ros\u00e1rio, 3863, Tiradentes, Itacoatiara, Amazonas, 69100-000 ,","place":["Brazil"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"286","published-online":{"date-parts":[[2026,10,7]]},"container-title":["Annals of Botany"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/academic.oup.com\/aob\/advance-article-pdf\/doi\/10.1093\/aob\/mcag320\/71668313\/mcag320.pdf","content-type":"application\/pdf","content-version":"am","intended-application":"syndication"},{"URL":"https:\/\/academic.oup.com\/aob\/advance-article-pdf\/doi\/10.1093\/aob\/mcag320\/71668313\/mcag320.pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,10,7]],"date-time":"2026-10-07T21:07:01Z","timestamp":1791407221000},"score":1,"resource":{"primary":{"URL":"https:\/\/academic.oup.com\/aob\/advance-article\/doi\/10.1093\/aob\/mcag320\/8876106"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2026,10,7]]},"references-count":0,"URL":"https:\/\/doi.org\/10.1093\/aob\/mcag320","relation":{},"ISSN":["1095-8290"],"issn-type":[{"value":"1095-8290","type":"electronic"}],"subject":[],"published":{"date-parts":[[2026,10,7]]},"article-number":"mcag320"}}