关键词: 枣, 贮藏, 拮抗菌, 黑斑病, 青霉病, 抑制作用

Abstract: The colonization of Metschnikowia zizyphicola strain XY201 on the surfaces and in the wounds of jujube‘Dongzao’fruits and the biological control of black spot and blue mold of postharvest jujubes by M. zizyphicola strain XY201 were studied. The results showed that the suspension of M. zizyphicola strain XY201 and its cooperation with sodium bicarbonate or Sportak had rapid population growing on the surfaces and in the wounds of fruits. In the conditions of 20 ℃，controlled atmosphere （CA/ 0 ℃）storage and modified atmosphere（MA/0 ℃）storage，the population of antagonistic yeast XY201 on the surfaces of fruits was 2.2 × 106–2.6 × 106（4 d after inoculated），6.3 × 105–9.7 × 105（60 d）and 4.0 × 105–1.1 × 106 CFU（75 d），respectively，which increased 34.3–57.0，15.2–25.5 and 4.8–20.3 times respectively compared to the inoculating start point. The population of antagonistic yeast XY201 in the wounds of fruits was 1.9 × 107–3.6 × 107（8 d），1.2 × 107–1.8 × 107（30 d）and 8.4 × 106–1.2 × 107 CFU（60 d），respectively，which increased 34.2–364.3，16.9–144.3 and 11.2–90.0 times than that of the inoculating start point，respectively. When M. zizyphicola strain XY201 at 1 × 108 CFU · mL-1 concentration was combined with 2% sodium bicarbonate or 50 mg · mL-1 Sportak，the colonization on the surfaces and in the wounds of jujube fruits was inhibited in the early period，then had no significant effect in the later period. When fruits were stored in the condition of CA（0 ℃，2%–8% O2 and 0% CO2），the suspending liquid of M. zizyphicola strain XY201 at 1 × 108 CFU · mL-1 concentration provided complete control of black spot，the disease rate decreased 52.5%–59.2%，the diameter of spot declined 5.9%–10.7%. The biological control of blue mold was not obvious，the disease rate only decreased 3.6%–6.1%，the diameter of spot declined 11.3%–19.0%.

Key words: jujube, storage, antagonists, black spot, blue mold, inhibitory effect