Persistent inner tepals and wings protect developing seeds of Rheum nanum from insect herbivory in Central Asian cold deserts

Autor: Yuting Li, Jannathan Mamut, Kaiqing Xie, Jing Zhao, Dunyan Tan
Jazyk: angličtina
Rok vydání: 2024
Předmět:
Zdroj: Ecology and Evolution, Vol 14, Iss 8, Pp n/a-n/a (2024)
Druh dokumentu: article
ISSN: 2045-7758
58891005
DOI: 10.1002/ece3.70179
Popis: Abstract Although the postdispersal functions of diaspore (fruit and its appendages) have been reported, little is known about their protective/defensive functions. In this context, diaspores with appendages (persistent inner tepals and/or fruit wings) that experienced predispersal herbivory by insects in natural populations of Rheum nanum were investigated, and the seed abortion percentage, seed and embryo masses, and germination of seeds from diaspores with different categories of insect herbivory were measured and compared. Predispersal insect herbivory of R. nanum diaspores was prevalent in the four investigated populations, but the percentage of diaspores with appendages (persistent inner tepals and and/or fruit wings) damaged by insects was significantly higher than that of diaspores with the pericarp damaged by insects. Seeds from diaspores with gnawed appendages experienced significantly less damage than those with gnawed pericarps. Importantly, we conclude that fruit appendages of R. nanum help to mechanically protect developing seeds from predispersal insect herbivory.
Databáze: Directory of Open Access Journals
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