Involvement of putative chemical wound signals in the induction of phenolic metabolism in wounded lettuce

Reinaldo Campos-Vargas, Mikal E. Saltveit

Resultado de la investigación: Article

108 Citas (Scopus)

Resumen

Cutting leaves of Romaine lettuce (Lactuca sativa L. cv. Longifolia) produces a wound signal that induces the synthesis of phenylalanine ammonia lyase (PAL, EC 4.3.1.5) and the accumulation of phenolic compounds in cells up to 2 cm from the site of injury, and tissue browning near the site of injury. The response of leaves within a head of Romaine lettuce to putative chemical wound signals [abscisic acid (ABA), jasmonate (JA) and methyl jasmonate (MeJA)] differed significantly with leaf age. Exposure of harvested heads of lettuce to ABA, JA, MeJA, or salicylic acid (SA) did not induce changes in PAL activity, the concentration of phenolic compounds or browning in mature leaf tissue that was similar to the level induced by wounding. Methyl jasmonate applied as vapour (10, 100 or 1000 μlkg-1 FW), or as an aqueous spray or dip (0.01-100 μM) at 5 or 10°C did not produce an effect on PAL activity or browning that differed significantly from the untreated controls. In contrast, JA, MeJA and SA did induce elevated levels of PAL activity in younger leaves. However, the levels induced were far lower than those induced by wounding. Wound induced phenolic metabolism in mature leaves appears to be induced by different signals than those functioning in young leaves.

Idioma originalEnglish
Páginas (desde-hasta)73-84
Número de páginas12
PublicaciónPhysiologia Plantarum
Volumen114
N.º1
DOI
EstadoPublished - 2002

Huella dactilar

Lettuce
plant damage
lettuce
methyl jasmonate
metabolism
Wounds and Injuries
Abscisic Acid
Salicylic Acid
head lettuce
romaine lettuce
leaves
phenylalanine ammonia-lyase
salicylic acid
Head
abscisic acid
phenolic compounds
Phenylalanine Ammonia-Lyase
leaf lettuce
Lactuca sativa
vapors

ASJC Scopus subject areas

  • Plant Science
  • Cell Biology
  • Genetics
  • Physiology
  • Medicine(all)

Citar esto

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abstract = "Cutting leaves of Romaine lettuce (Lactuca sativa L. cv. Longifolia) produces a wound signal that induces the synthesis of phenylalanine ammonia lyase (PAL, EC 4.3.1.5) and the accumulation of phenolic compounds in cells up to 2 cm from the site of injury, and tissue browning near the site of injury. The response of leaves within a head of Romaine lettuce to putative chemical wound signals [abscisic acid (ABA), jasmonate (JA) and methyl jasmonate (MeJA)] differed significantly with leaf age. Exposure of harvested heads of lettuce to ABA, JA, MeJA, or salicylic acid (SA) did not induce changes in PAL activity, the concentration of phenolic compounds or browning in mature leaf tissue that was similar to the level induced by wounding. Methyl jasmonate applied as vapour (10, 100 or 1000 μlkg-1 FW), or as an aqueous spray or dip (0.01-100 μM) at 5 or 10°C did not produce an effect on PAL activity or browning that differed significantly from the untreated controls. In contrast, JA, MeJA and SA did induce elevated levels of PAL activity in younger leaves. However, the levels induced were far lower than those induced by wounding. Wound induced phenolic metabolism in mature leaves appears to be induced by different signals than those functioning in young leaves.",
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Involvement of putative chemical wound signals in the induction of phenolic metabolism in wounded lettuce. / Campos-Vargas, Reinaldo; Saltveit, Mikal E.

En: Physiologia Plantarum, Vol. 114, N.º 1, 2002, p. 73-84.

Resultado de la investigación: Article

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