@article{Fattorini:2023:10.1016/j.phytochem.2023.113707,
author = {Fattorini, R and Egan, PA and Rosindell, J and Farrell, IW and Stevenson, PC},
doi = {10.1016/j.phytochem.2023.113707},
journal = {Phytochemistry: the international journal of plant chemistry, plant biochemistry and molecular biology},
pages = {1--7},
title = {Grayanotoxin I variation across tissues and species of Rhododendron suggests pollinator-herbivore defence trade-offs},
url = {http://dx.doi.org/10.1016/j.phytochem.2023.113707},
volume = {212},
year = {2023}
}

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TY  - JOUR
AB  - Grayanotoxin I (GTX I) is a major toxin in leaves of Rhododendron species, where it provides a defence against insect and vertebrate herbivores. Surprisingly, it is also present in R. ponticum nectar, and this can hold important implications for plant-pollinator mutualisms. However, knowledge of GTX I distributions across the genus Rhododendron and in different plant materials is currently limited, despite the important ecological function of this toxin. Here we characterise GTX I expression in the leaves, petals, and nectar of seven Rhododendron species. Our results indicated interspecific variation in GTX I concentration across all species. GTX I concentrations were consistently higher in leaves compared to petals and nectar. Our findings provide preliminary evidence for phenotypic correlation between GTX I concentrations in defensive tissues (leaves and petals) and floral rewards (nectar), suggesting that Rhododendron species may commonly experience functional trade-offs between herbivore defence and pollinator attraction.
AU  - Fattorini,R
AU  - Egan,PA
AU  - Rosindell,J
AU  - Farrell,IW
AU  - Stevenson,PC
DO  - 10.1016/j.phytochem.2023.113707
EP  - 7
PY  - 2023///
SN  - 0031-9422
SP  - 1
TI  - Grayanotoxin I variation across tissues and species of Rhododendron suggests pollinator-herbivore defence trade-offs
T2  - Phytochemistry: the international journal of plant chemistry, plant biochemistry and molecular biology
UR  - http://dx.doi.org/10.1016/j.phytochem.2023.113707
UR  - https://www.ncbi.nlm.nih.gov/pubmed/37149121
UR  - https://www.sciencedirect.com/science/article/pii/S0031942223001231
UR  - http://hdl.handle.net/10044/1/105607
VL  - 212
ER  - 

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