CREA-VE, Council for Agricultural Research and Economics - Research Centre for Viticulture and Enology, Via Casamassima, 148, 70010 Turi, BA, Italy.
CREA-VE, Council for Agricultural Research and Economics - Research Centre for Viticulture and Enology, Via Casamassima, 148, 70010 Turi, BA, Italy.
Food Res Int. 2019 Dec;126:108667. doi: 10.1016/j.foodres.2019.108667. Epub 2019 Sep 11.
Some red-pink table grape varieties, cultivated in warm climates, can fail in achieving the right level of anthocyanins responsible for the intense and uniform red color of berries. Nowadays, this is becoming an important technological issue in the Mediterranean area, which may result in decreasing market acceptance and potential economic value of table grape. Usually, plant growth regulators or phytohormones, such as S-ABA, can overcome this problem because they drive the accumulation of anthocyanins over the ripening season. Harpin proteins (HrP), which enhance the plant disease resistance, may be supposed to stimulate the anthocyanins biosynthesis in grape skin if applied close to veraison. Therefore, this research aimed at comparing the effect of HrP and S-ABA over the anthocyanin and color improvement of Crimson Seedless table grape grown in Southern Italy. For the first time, the exogenous treatment with HrP showed as effective as the less sustainable S-ABA one in favoring the anthocyanin accumulation, leading to peonidin-3-O-glucoside, cyanidin-3-O-glucoside, and malvidin-3-O-glucoside values up to 4 folds higher than control grapes and giving rise to a greater concentration of the more stable acylated anthocyanins. Overall, the color of berries was improved but keeping high the other quality characteristics.
一些在温暖气候下种植的粉红色和红色鲜食葡萄品种，其果实可能无法达到特定的花青素水平，而花青素正是浆果呈现鲜艳、均匀红色的关键。目前，地中海地区的果农正面临着这一严峻挑战，因为这会导致葡萄的市场接受度和潜在经济价值降低。通常情况下，植物生长调节剂或植物激素，如 S-ABA（脱落酸），可以通过调控果实成熟过程中的花青素积累来解决这一问题。而 harpin 蛋白（HrP）作为一种能够增强植物抗病性的蛋白，被认为可以在葡萄转色期附近喷施以促进葡萄果皮中的花青素生物合成。因此，本研究旨在比较 HrP 和 S-ABA 对生长在意大利南部的“Crimson Seedless”无核红提葡萄的花青素和颜色的影响。这是首次研究发现，外源施用 HrP 与传统的、可持续性稍差的 S-ABA 处理同样有效，能促进花青素的积累，使矢车菊素-3-O-葡萄糖苷、天竺葵素-3-O-葡萄糖苷和飞燕草素-3-O-葡萄糖苷的含量分别提高了 4 倍以上，比对照葡萄高出 4 倍，并产生更高浓度的酰化花青素，使浆果颜色得到改善，同时保持了较高的其他品质特性。
