Seasonal Dry Matter, Starch, and Nutrient Distribution in 'Concord' Grapevine Roots

Abstract

<jats:p>Three-year-old field-grown 'Concord' (<jats:italic>Vitis labruscana</jats:italic> Bailey) grapevines were destructively harvested at eight growth stages during 1998 to quantify growth, carbohydrate distribution, and nutrient concentrations of different organs. The roots were the major storage organ for carbohydrates and nutrients, accounting for 84% of the starch and 75% of nitrogen stored in the vines at the beginning of the season. About 78% of the reserve starch in the vine was used for prebloom root and shoot growth. Early-season fine-root growth was a sink for stored vine nitrogen; however, the fine roots quickly became a nitrogen uptake source, providing at least 84% of the spring growth nitrogen. Total root biomass increased from bloom to leaf fall, but reserve carbohydrates and nutrients lost in the prebloom period did not begin to recover in roots until the end of rapid shoot development in late July. Crop removal at harvest, and a late-season root flush, further increased vegetative carbohydrate and nutrient reserves in the short postharvest period.</jats:p>

Partitioning and mobilization of starch and N reserves in grapevine (Vitis vinifera L.)

“…Accordingly, roots contained more than 90% of the starch stored in the vines at the beginning of the season. These results confirmed those previously reported for other grape varieties (Eifert et al, 1960;Bouard, 1966;Bates et al, 2002) and for other woody species (Loescher et al, 1990). At that point, starch in the trunk accounted for only 3% of PP starch.…”

Spatial and Temporal Variation of Roots, Arbuscular Mycorrhizal Fungi, and Plant and Soil Nutrients in a Mature Pinot Noir (Vitis vinifera L.) Vineyard in Oregon, USA

“…The high level of arbuscules present in fine roots at this time of year suggests that significant nutrient uptake is likely occurring during the post-harvest period. This idea is not new for grapevines (Conradie, 1980(Conradie, , 1981a, but it has not been supported by whole vine studies from the cooler grape growing regions of North America (Bates et al, 2002;Hanson and Howell, 1995). Even though Oregon is considered a cool climate for viticulture, the warmer air and soil temperatures that occur here in the fall and early winter, as compared to the mid west and northeast United States, probably allows for significant root activity well after harvest.…”

Spatial and temporal effects of nitrogen addition on root life span of Leymus chinensis in a typical steppe of Inner Mongolia

“…2003). Differences in the temporal variability of root mortality have been ascribed to a number of factors, including soil water potential, temperature and the content of root carbohydrates (Bates, Dunst & Joy 2002; Anderson et al . 2003; Baddeley & Watson 2005).…”