Planta (2017) 246:525–535 DOI 10.1007/s00425-017-2708-6 ORIGINAL ARTICLE Low source–sink ratio reduces reserve starch in grapevine woody canes and modulates sugar transport and metabolism at transcriptional and enzyme activity levels 1 1 2 2 • • • • Ange ´lica Silva Henrique Noronha Zhanwu Dai Serge Delrot 1,3,4 Herna ˆ ni Gero ´ s Received: 14 February 2017 / Accepted: 3 May 2017 / Published online: 19 May 2017 Springer-Verlag Berlin Heidelberg 2017 Abstract plants. Moreover, carbon limitation promoted a transcrip- Main conclusion Severe leaf removal decreases storage tional adjustment of genes involved in starch metabolism in starch and sucrose in grapevine cv. Cabernet Sauvignon grapevine woody tissues, including a decrease in the fruiting cuttings and modulates the activity of key expression of the plastidic glucose-6-phosphate transloca- enzymes and the expression of sugar transporter genes. tor, VvGPT1. Contrarily, the transcript levels of the gene coding the catalytic subunit VvAGPB1 of the VvAGPase Leaf removal is an agricultural practice that has been complex were higher in canes from 2L plants than in 6L shown to modify vineyard efﬁciency and grape and wine and 12L, which positively correlated with the biochemical composition. In this study, we took advantage of the ability activity
Planta – Springer Journals
Published: May 19, 2017
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