6-BA对‘全球红’葡萄果实发育过程中糖分含量和转化酶活性的影响

经处理的‘全球红’葡萄果实发育过程中的蔗糖、葡萄糖、果糖和总糖的含量变化趋势与未经6-BA处理的基本上一致,采收时经6-BA处理的果实中糖含量比未经6-BA处理的有不同程度的提高,而且随着6-BA处理浓度的升高而增加,以30mg·L^(-1)6-BA处理的最为显著,经6-BA处理的葡萄果实发育过程中的转化酶活性也有不同程度的提高。

GA_3和6-BA混合处理对葡萄果穗致畸的发育解剖学研究

采用不同含量GA3+6-BA激素于葡萄开花前和盛花期喷施‘全球红’葡萄果穗,并对激素处理和对照不同时期果穗的解剖学结构特征进行比较分析,以探讨外源激素对葡萄果穗的致畸原因。结果表明:(1)不同含量激素均可使葡萄穗轴弯曲、硬化,果粒僵化并出现大小粒现象,果穗着色晚、成熟期推迟,其中30 mg/kg GA3+10 mg/kg 6-BA处理最为严重。(2)解剖学观察发现,处理30 mg/kg GA3+10 mg/kg 6-BA较对照在一定程度上促进了果穗细胞的分裂和分化,致皮层、髓腔以及果粒果皮等不同组织细胞变形,促使皮层细胞数量增加和细胞的不均匀变化以及髓腔变形。(3)GA3+6-BA处理促进了其维管柱组织的次生生长和木栓化细胞的增加。(4)葡萄果穗畸变主要集中发生于果穗生长发育的中后期,即花后20 d至花后40 d。

Antisepsis and Fresh-keeping Effects of Natamycin Coating Compounds Treatment on Red Global Grape

The aim was to research fresh-keeping effects of natamycin on cold-pre- served grape. Red globe grapes were processed with compound coating liquid of chitosan with mass fraction at 1% and natamycin with mass fractions at 0.20% （T1）, 0.40% （T2） and 0.60% （T3）, respectively. Grapes processed with water （CK3） and 1% chitosan （CK2） were taken as control groups. Rotten rate, seed shattering rate, mass loss rate, respiratory intensity and related physiological quality in test and control groups were compared. The results indicated that respiratory intensity, mass loss rate, rotten rate and seed shattering rate in CK1 were all higher than those in CK2. In addition, T1, T2 and T3 were lower in the indices than CK1 and CK2, but still kept at a high level in fruit hardness. Furthermore, mass fractions of Vc and titratable acid declined more slowly in T1, T2 and T3, compared with CK1 and CK2. Natamycin better preserved grapes and prolonged storage period. In general, natamycin with mass fraction at 0.4% proved best in fresh-keeping.