Abstract: In order to explore the effect of sink-source relationship on anthocyanin accumulation and quality of Beimei grape,the ratio of leaf number to ear number of fruiting branches was adjusted before veraison as 18 leaves/ panicle(CK),10 leaves/panicle(T1),14 leaves/ panicle(T2),22 leaves/ panicle(T3) and 26 leaves/ panicle (T4),and the anthocyanin content in grape peel and fruit quality were determined.The results showed that compared with CK, increasing the ratio of leaf to fruit could significantly increase the contents of total soluble sugar and total phenol,decrease the contents of titratable acid and tannin,and increase the contents of total anthocyanins and five kinds of anthocyanins in grape peel.When the fruit was harvested,the total anthocyanin content in the pericarp treated with T3 and T4 was significantly increased compared with that of CK by 12.7% and 15.1%,respectively.Compared with CK, the contents of petunidin-3-O-glucoside, cyanidin-3-O-glucoside, delphinidin-3-O-glucoside,peonidin-3-O-glucoside and malvidin-3-O-glucoside in pericarp treated with T3 increased significantly by 22.6%,20.4%,59.4%,28.7% and 4.1%,respectively,and the contents of five anthocyanin monomers in pericarp treated with T4 increased significantly by 21.9%,9.3%,23.2%,16.5% and 14.4%,respectively. The principal component analysis of the fruit quality of Beimei grape showed that the first principal component contained the contents of peonidin-3-O-glucoside, delphinidin-3-O-glucoside, total soluble sugar,cyanidin-3-O-glucoside,the second principal component contained the contents of titratable acid and petunidin-3-O-glucoside.The comprehensive score of fruit quality of Beimei grape with different leaf-fruit ratio treatment was the highest in T3 treatment,followed by T4 treatment,and the lowest in T1 treatment.Therefore,in order to ensure the grape yield,it is suggested that the leaf-fruit ratio of grape
plant should be adjusted to 22 leaves/panicle,so as to improve the anthocyanin content in the pericarp and fruit quality of Beimei grape.

Key words: Grape, Sink-source relationship, Ratio of leaf number to ear number of fruiting branches;Anthocyanin, Fruit quality, Principal component analysis

摘要： 为了探讨库源关系对北玫葡萄果实花色苷成分积累和品质的影响，以北玫葡萄为材料，在果实转色前调节结果枝叶片数与果穗数比值，设置18叶/穗（CK）、10叶/穗（T1）、14叶/穗（T2）、22叶/穗（T3）和26叶/穗（T4）5个处理，测定葡萄果皮中花色苷含量及果实品质的相关指标。结果表明，与CK相比，适量提高叶果比可明显提高葡萄果实中可溶性总糖、总酚含量，降低可滴定酸和单宁含量，增加葡萄果皮中总花色苷和5种花色苷单体含量。果实采收时，T3和T4处理果皮中总花色苷含量分别比CK显著提高了12.7%和15.1%，T3处理果皮中甲基花翠素-3-O-葡萄糖苷、花青素-3-O-葡萄糖苷、花翠素-3-O-葡萄糖苷、甲基花青素-3-O-葡萄糖苷和二甲花翠素-3-O-葡萄糖苷5种花色苷单体含量分别比CK显著增加22.6%、20.4%、59.4%、28.7%和4.1%，T4处理果皮中5种花色苷单体含量分别比CK显著增加21.9%、9.3%、23.2%、16.5%和14.4%。对北玫葡萄果实品质的主成分分析表明，第1主成分由甲基花青素-3-O-葡萄糖苷、花翠素-3-O-葡萄糖苷、可溶性总糖和花青素-3-O-葡萄糖苷含量构成，第2主成分由可滴定酸和甲基花翠素-3-O-葡萄糖苷含量构成。不同叶果比处理北玫葡萄果实品质综合得分最高的是T3处理，其次是T4处理，T1处理最低。因此，在生产中为保证葡萄产量，建议调节葡萄植株叶果比为22叶/穗，以提高北玫葡萄果皮中花色苷含量及果实品质。

关键词: 葡萄, 库源关系, 叶果比, 花色苷, 果实品质, 主成分分析