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 original | English |
|---|---|
| Páginas (desde-hasta) | 73-84 |
| Número de páginas | 12 |
| Publicación | Physiologia Plantarum |
| Volumen | 114 |
| N.º | 1 |
| DOI | |
| Estado | Published - 2002 |
Huella dactilar
ASJC Scopus subject areas
- Plant Science
- Cell Biology
- Genetics
- Physiology
- Medicine(all)
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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
TY - JOUR
T1 - Involvement of putative chemical wound signals in the induction of phenolic metabolism in wounded lettuce
AU - Campos-Vargas, Reinaldo
AU - Saltveit, Mikal E.
PY - 2002
Y1 - 2002
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=0036092110&partnerID=8YFLogxK
U2 - 10.1034/j.1399-3054.2002.1140111.x
DO - 10.1034/j.1399-3054.2002.1140111.x
M3 - Article
AN - SCOPUS:0036092110
VL - 114
SP - 73
EP - 84
JO - Physiologia Plantarum
JF - Physiologia Plantarum
SN - 0031-9317
IS - 1
ER -