喷施钙素对‘森田尼无核’葡萄生理生化特性和果实品质的影响

Effects of calcium treatments on physiological-biochemical characteristics and fruit quality of grape(Vitis vinifera cv.‘Centennial seedless’)

通过不同时期、不同浓度的Ca(NO3)2.4H2O处理,研究了喷施钙素对‘森田尼无核’葡萄生理生化特性和果实品质的影响.结果表明:在果实采收前1个月和采收前10 d分别喷施不同浓度水平的Ca(NO3)2.4H2O,‘森田尼无核’葡萄在中度供钙水平(8 g.L-1和12 g.L-1)下叶片叶绿素总量明显高于清水(对照)、低钙(4g.L-1和8 g.L-1)、高钙(12 g.L-1和16 g.L-1)水平;8 g.L-1和12 g.L-1供钙水平下,叶片叶绿素总量比对照增高了14.2%和27.7%,而过氧化物酶(POD)、超氧化物歧化酶(SOD)、过氧化氢酶(CAT)的活性、丙二醛(MDA)含量及相对电导率比对照分别降低了85.0%、53.2%;46.9%、50.2%;30.9%、41.2%;26.3%、42.3%和13.4%3、2.8%;同时发现,中度供钙可显著提高VC、可滴定酸含量及果实硬度,降低可溶性固形物含量.

The effects of Ca（NO3）2 · 4H2O at different concentration level and treatments time on physiological-biochemical characteristics and fruits quality of grape （Vitis vinifera cv. Centennial seedless） were studied in this paper. The results showed that calcium treatment atmoderate （8 g·L^-1and 12 g·L^-1） before one month and ten days of harvest had a higher contents of chlorophyll in leaves than that atlow （4 g·L^-1 and 8 g·L^-1）, high （12 g·L^-1 and 16 g·L^-1） and the control. The treatment at 8 g·L^-1 ~12 g·L^-1increased by 14. 2 % and 27. 7% of chlorophyll content~ however, the activity of peroxidase （POD）, superoxide dismutase （SOD）, catalase （CAT）, the contents of MDA and the relative electric conductance in leaves were lower by 85.0%,53.2 %-46.9 %,50. 2 %;30. 9 %,41.2 %~26. 3%,42. 3% and 13.4%, 32. 8% than the control. The moderate calcium treatment markedly increased fruit hardness,and the content of VC and titratable acids; however, reduced SSC.