Nutrient limitation shortly before harvest promotes high accumulation of antioxidants in lettuce

Plants exposed to drought not only have to cope with a shortage of water, but also with a simultaneous decrease in nutrient availability. In this greenhouse experiment, the responses of antioxidants and key metabolites to 2 or 4 days of water limitation immediately prior to harvest were compared to the effect of nutrient limitation with continued water supply in lettuce leaves. Water limitation led to a faster increase in stress intensity than nutrient limitation. While moderate drought stress led to a slight increase in the antioxidant compounds studied, there was a concomitant sharp decrease in starch content. Under nutrient limitation, an increase in the content of ascorbic acid, the proportion of reduced ascorbic acid and the content of phenolic compounds, flavonoids, soluble sugars and starch was observed in the mild phase of stress. These results suggest that reducing nutrient availability shortly before harvest could be a suitable means of improving the nutritional value of crops through cultivation practices as opposed to breeding.

• Publication year

  2024

• Venue

  Annals of Applied Biology

• Publication date

  2024-10-28

• Fields of study

  Not labeled

• Identifiers
  DOI 10.1111/aab.12949
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar

• No claims are published for this paper.

• No concepts are published for this paper.

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