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Food Science and Technology International
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Comparative Study of Two Plum (Prunus salicina Lindl.) Cultivars during Growth and Ripening

M. Zuzunaga

Centro de Edafologia y Biologia Aplicada del Segura (CSIC). Avda. La Fama 1, 30003 Murcia, Spain

M. Serrano

D. Martinez-Romero

D. Valero

Escuela Politécnica Superior de Orihuela, Universidad Miguel Hernádndez, Ctra. Beniel, km 3.2, 03312 Orihuela, Alicante, Spain

F. Riquelme

Centro de Edafologíia y Biología Aplicada del Segura (CSIC). Avda. La Fama 1, 30003 Murcia, Spain;riquelmle{at}naiturai.cebas.csic.es

Some physicochemical parameters related to fruit growth and ripening, as well as the plant growth regulators ethylene, abscisic acid and polyamines were determined in two plum cultivars (Golden Japan and Santa Rosa) during their development and ripening. From the ninth week of development, the physicochemical parameters (punction force, color and ripening index) showed significant modifications, indicating that the ripening process had begun. Santa Rosa cultivar exhibited a climacteric ripening pattern, in which these changes coincided with increase in respiration rate, ethylene emission and l-aminocyclopropane-l-carboxylic acid (free and total) content, while Golden Japan cultivar showed a non-climacteric ripening process, without any increase in ethylene or respiration rate associated with ripening. Polyamines increased in Golden Japan cultivar during ripening (especially putrescine), which could be responsible for the low ethylene emission. In both cultivars, abscisic acid started to increase, coinciding with the changes in the parameters related to ripening.

Key Words: plum • Prunus salicina • growth • ripening • ethylene • polyamines • abscisic acid

Food Science and Technology International, Vol. 7, No. 2, 123-130 (2001)
DOI: 10.1177/108201320100700204
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