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Olsen, K.M., Slimestad, R., Lea, W.S., Brede, C., Løvdal, T., Ruoff, P., Verheul, M.J. and Lillo, C. (2009) Temperature and Nitrogen Effects on Regulators and Products of the Flavonoid Pathway: Experimental and Kinetic Model Studies. Plant Cell and Environment, 32, 286-299. http://dx.doi.org/10.1111/j.1365-3040.2008.01920.x

has been cited by the following article:

• TITLE: Reduction in Nitrogen Prior to Harvest Increases Phenolic Content of Baby Red Lettuce Leaves

  AUTHORS: Dario Stefanelli, Sonja Winkler, Christine Frisina, Rod Jones

  KEYWORDS: Yield, Production, Vitamin C, Antioxidant Capacity

  JOURNAL NAME: Agricultural Sciences, Vol.5 No.6, May 27, 2014

  ABSTRACT: This study investigated baby red lettuce leaves grown in an inert media and fertigated with 300 or 1000 mg·L-1 CaNO3-N (19% Ca; 15.5% N), and the effects of altering CaNO3-N concentrations in the last 7 days prior to harvest on yield, antioxidant capacity, TPP and vitamin C content. Plants receiving 1000 mg·L-1 CaNO3-N had a significantly higher leaf FW than those fertilized with 300 mg·L-1 CaNO3-N after both 21 and 28 days. Pulsing plants with 1000 mg·L-1 CaNO3-N for 7 days after 21 days at 300 mg·L-1 CaNO3-N resulted in a significant increase in FW of 14%, compared with plants receiving 300 mg·L-1 CaNO3-N. After 28 days plants fertilized with nitrogen at 300 mg·L-1 CaNO3-N were significantly higher in TPP than those fertilized with 1000 mg·L-1 CaNO3-N. While there was no significant effect on TPP of a 7-day 1000 mg·L-1 CaNO3-N pulse added to 300 mg·L-1 CaNO3-N, a 7-day pulse of 300 mg·L-1 CaNO3-N added to 1000 mg·L-1 CaNO3-N resulted in a significant increase in TPP. These results indicate that reducing the N availability for 7 days prior to harvest can result in a significant increase in plant phenolic content with no adverse effect on yield.