Influence of sulphur fertilisation on the floral scent of flowering crops
2009
Bloem, Elke Mareke | Haneklaus, Silvia | Daniels, R. | Schnug, Ewald
Regularly, macroscopic sulphur (S) deficiency can be found in oilseed rape, which causes unique flower symptoms with changes in colour from bright to pale yellow and in shape and size of the petals. In addition, the scent, which is a strong signal for honeybees, is influenced by S deficiency. It is unknown if other flowering crops react to S deficiency with a change in scent, too. It was the aim of the presented study to examine the influence of S nutrition on the release of volatiles during blooming. Crops with (white mustard, oil radish) and without Scontaining secondary compounds (chamomile, field beans, and peas) were grown on plots with and without S fertilisation. The S status was monitored and the scent of flowers was characterised 3-times at main flowering by employing an electronic nose. The S content in vegetative plant parts increased with S fertilisation for all crops. Significant differences in scent were determined in relation to S fertilisation at least at one sampling date for all investigated crops except white mustard.
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