Saisonale Veränderungen von Kohlenhydratgehalten im Spross und Wachstumseigenschaften bei der Rebsorte ‘Trakya İlkeren’ (Vitis vinifera L.)

Water stress during the post-harvest period affects new root formation but not starch concentration and content in Chardonnay grapevine (Vitis vinifera L.) perennial organs

“…One of the most noticeable effects of water stress during post-harvest was the rapid reduction of leaf area through defoliation, with plants accelerating the normal process of leaf senescence apparently to compensate for unfavourable water status conditions (Figure 3). During post-harvest, leaf functioning is considered to play an important role in carbohydrate assimilation until leaf senescence (Loescher et al 1990, Köse andAtes 2017).…”

“…The early defoliation of vines, after several consecutive years under warm conditions and water limitations, has been reported to influence carbohydrate reserves. As a result in the subsequent seasons, it occurred the reductions in yields and poorer vegetative growth, because new growth is dependent on pre-existing reserves (Vaillant-Gaveau et al 2014, Greven et al 2016, Köse and Ates 2017. Under the conditions where our study was developed, we did not evaluate variations on carbohydrate reserves in front of water limitation.…”

“…Starch is the primary reserve form for carbohydrates stored in trunk and root organs (Mullins et al 1992, Pellegrino et al 2014, Köse and Ates 2017. Although starch concentration seems to be influenced by grapevine cultivar, climate and vine management (Bennett et al 2005), the majority of starch storage is located in roots (Bates et al 2002, Zapata et al 2004).…”

Effects of shoot tip colchicine applications on some grape cultivars

“…Both cultivars are used as table and as raisin locally (Kara et al, 2017a). 'Trakya İlkeren' is preferred in early ecology in terms of its early yield, it can also be successful in short-vegetation areas (Köse and Ateş, 2017;Gülcü et al, 2020). Plants obtained from cuttings were used in study.…”