Mature fruit abscission is associated with up-regulation of polyamine metabolism in the olive abscission zone

Journal of Plant Physiology
Maria C Gomez-JimenezIsabel M Sanchez-Calle

Abstract

This study investigates whether, and how, polyamines (PAs) are involved in mature fruit abscission of olive (Olea europaea L.). Physiological abscission was studied in relation to the activation of the abscission zone (AZ), located between fruit and peduncle, from two olive cultivars where the breakstrength profiles and the scanning electron micrographs illustrated differences in the abscission program, under natural conditions, of mature fruit. The localization and activities of diamine oxidase (DAO), polyamine oxidase (PAO) and PA biosynthetic enzymes, together with PA content were investigated in the fruit AZ during development and abscission. The activities of arginine decarboxylase and S-adenosyl-l-methionine decarboxylase in the fruit AZ were significantly increased and decreased, respectively, by mature fruit abscission, in good agreement with the rise in free putrescine (Put), and content in uncommon PAs there, such as homospermidine and cadaverine, while no significant differences in free spermidine (Spd) and spermine (Spm) contents were detected. By contrast, an abscission-induced decrease was noted in the contents of insoluble conjugated Put, Spd and Spm. The maximum activity of PAO coincided with the maximum content...Continue Reading

References

Dec 28, 1999·Proceedings of the National Academy of Sciences of the United States of America·D Ober, T Hartmann
Jun 13, 2001·Plant Physiology·S E Patterson
Mar 12, 2002·Journal of Experimental Botany·Bavita AsthirWilliam Spoor
Dec 20, 2003·Plant Molecular Biology·Tzann-Wei WangJohn E Thompson
Jul 13, 2004·Plant Physiology·Akihiro ImaiTaku Takahashi
Oct 27, 2004·Journal of Plant Physiology·Marina FranceschettiNello Bagni
Dec 13, 2005·Current Opinion in Plant Biology·Michael W LewisSarah J Liljegren
Jan 13, 2006·Trends in Plant Science·Alessandra ConaParaskevi Tavladoraki
Mar 3, 2006·Tree Physiology·Jihong LiuTakaya Moriguchi
Jul 3, 2008·Planta·T KusanoY Takahashi

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Citations

Jan 8, 2013·Plant & Cell Physiology·Jose A Gil-Amado, Maria C Gomez-Jimenez
Apr 12, 2013·Plant & Cell Physiology·Rajtilak MajumdarSubhash C Minocha
Jul 18, 2014·Journal of Agricultural and Food Chemistry·Huey Fang TehDavid R Appleton

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