摘要
为研究多效唑处理采后沙田柚伤果的诱导抗病效应,在采后沙田柚果实中部表面分2层分别削约1cm2的伤口各5个,以多效唑溶液浸1min,预贮7d后单果包聚苯乙烯薄膜、室温贮藏。贮藏前期果实伤口附近正常果皮先由淡橙黄转为浅绿色,后又退绿至与正常果面一致颜色。伤口表面先微显绿色,然后转为红褐色,随贮期的延长褐色逐渐加深。伤口白皮层逐渐变硬,伤口下2～3mm内白皮层变为褐色。切片显微观察伤口附近细胞壁加厚,细胞内出现颗粒状物。1.0mmol/L多效唑处理伤果,90d供试果感染率13.33%,与绿色南方无显著差异。结果表明多效唑对采后沙田柚具明显诱导抗病的作用。
In order to improve disease-resistant capability of postharvest Shatian pomelo during storage at room temperature,the paclobutrazol was used to treat wounded fruits for evaluating the disease-resistant response due to the induction of paclobutrazol. Postharvest Shatian pomelo was cut 10 wounds with a size of 1 cm2,and then immersed in paclobutrazol solution for 1 min. The treated fruits was wrapped with PVC film and stored at room temperature after 7-day pre-storage. During storage,the color of normal peel adjacent to the wounds was changed from orange to light green at the early stage of the storage,and gradually recovered to orange. However,the wounded surface was changed from white to light green at the beginning of storage,and then to brown as the extension of storage time. The hardness of the wounds exhibited a gradual increase and the white cortex below the wounds was changed to brown. Cell wall of the wound surface layer was become thinker and grains in the white cortex of cells near to the wounds were observed. The infection rate of wounded fruits treated with paclobutrazol solution at the concentration of 1.0 mmol/L paclobutrazol was 13.33% after 90-day storage. Therefore,paclobutrazol has obvious disease-resistance effect on postharvest Shatian pomelo fruits through the induction of paclobutrazol.
出处
《食品科学》
EI
CAS
CSCD
北大核心
2010年第20期453-458,共6页
Food Science
关键词
沙田柚
采后
多效唑
诱导抗病
Shatian pomelo
postharvest
paclobutrazol
induced disease resistance
