Targeted systems biology profiling of tomato fruit reveals coordination of the Yang cycle and a distinct regulation of ethylene biosynthesis during postclimacteric ripening

• Verfasst von: Poel, Bram van de [VerfasserIn]
• Verfasst von: Wirtz, Markus [VerfasserIn]
• Verfasst von: Hell, Rüdiger [VerfasserIn]
• Titel: Targeted systems biology profiling of tomato fruit reveals coordination of the Yang cycle and a distinct regulation of ethylene biosynthesis during postclimacteric ripening
• Verf.angabe: Bram Van de Poel, Inge Bulens, Aikaterina Markoula, Maarten L.A.T.M. Hertog, Rozemarijn Dreesen, Markus Wirtz, Sandy Vandoninck, Yasmin Oppermann, Johan Keulemans, Ruediger Hell, Etienne Waelkens, Maurice P. De Proft, Margret Sauter, Bart M. Nicolai, and Annemie H. Geeraerd
• Umfang: 17 S.
• Fussnoten: Gesehen am 11.05.2017
• Titel Quelle: Enthalten in: Plant physiology
• Jahr Quelle: 2012
• Band/Heft Quelle: 160(2012), 3, S. 1498-1514
• ISSN Quelle: 1532-2548
• DOI: doi:10.1104/pp.112.206086
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1558537244

Abstract

The @concept of system 1 and system 2 ethylene biosynthesis during climacteric fruit ripening was initially described four decades ago. Although much is known about fruit development and climacteric ripening, little information is available about how ethylene biosynthesis is regulated during the postclimacteric phase. A targeted systems biology approach revealed a novel regulatory mechanism of ethylene biosynthesis of tomato (Solanum lycopersicum) when fruit have reached their maximal ethylene production level and which is characterized by a decline in ethylene biosynthesis. Ethylene production is shut down at the level of 1-aminocyclopropane-1-carboxylic acid oxidase. At the same time, 1-aminocyclopropane-1-carboxylic acid synthase activity increases. Analysis of the Yang cycle showed that the Yang cycle genes are regulated in a coordinated way and are highly expressed during postclimacteric ripening. Postclimacteric red tomatoes on the plant showed only a moderate regulation of 1-aminocyclopropane-1-carboxylic acid synthase and Yang cycle genes compared with the regulation in detached fruit. Treatment of red fruit with 1-methylcyclopropane and ethephon revealed that the shut-down mechanism in ethylene biosynthesis is developmentally programmed and only moderately ethylene sensitive. We propose that the termination of autocatalytic ethylene biosynthesis of system 2 in ripe fruit delays senescence and preserves the fruit until seed dispersal.