Journal
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
Volume 64, Issue 49, Pages 9307-9316Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.jafc.6b02342
Keywords
Onobiychis viciifolia; sainfoin; drought stress; sainfoin rust; MS/MS quantification; polyphenols; condensed tannins; proanthocyanidins
Funding
- European Commission [PITN-GA-2011-289377]
- University of Turku (Ecological Interactions)
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Sainfoin (Onoblychis viciifolia Scop.) is a forage legume, which improves animal health and the environmental impact of livestock farming due to its proanthocyanidin content. To identify the impact of drought on acetone/water-extractable proanthocyanidin (PA) concentration and composition in the generative and vegetative stages, a rain exdosure experiment was established. Leaves of 120 plants from 5.different sainfoin accessions were sampled repeatedly and analyzed by UPLC-ESI-MS/ MS. The results showed distinct differences in, response to drought between vegetative and generative plants. Whereas vegetative plants showed a strong response to drought in growth (-56%) and leaf PA concentration (+46%), generative plants showed no response in growth (-2%) or PA concentration (-9%). The PA composition was stable across environments. The five accessions varied in PA concentrations and composition but showed the same pattern of response to the experimental treatments. These results show that the ontogenetic stage at which drought occurs significantly affects the plant's response.
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