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中国农学通报

中国农学通报 ›› 2010, Vol. 26 ›› Issue (9): 283-288.

• 植物保护 农药 • 上一篇    下一篇

环境因子对荔枝霜疫霉生长及侵染的影响

蔡学清1,吴昌镇1,林通1,林娜1,谢玲平1,胡方平1,2   

  • 收稿日期:2009-12-03 修回日期:2009-12-23 出版日期:2010-05-05 发布日期:2010-05-05
  • 基金资助:

    植物内生细菌对荔枝采后病害的防治及保鲜研究;内生细菌防治荔枝采后病害及保鲜作用的生态学机理研究

Influence of Enviranmental Factors on the Development and Infestation of Peronophthora litchii

Cai Xueqing1, Wu Changzhen1, Lin Tong1, Lin Na1,Xie Lingping1, Hu Fangping1,2   

  • Received:2009-12-03 Revised:2009-12-23 Online:2010-05-05 Published:2010-05-05

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摘要：

摘要：本文就环境因子对荔枝霜疫霉的生长速度、产孢量、孢子囊萌发及侵染的影响进行了较为系统的探讨。结果表明，该菌生长及产孢最适的温度为24℃，pH值为 7.0；菌丝生长最适的光照时间为20 h，产孢最适的光照时间为16 h；另外该菌孢子囊的致死温度为45℃，10min。另外，实验还明确了该菌在不同的温度条件、光照时间、pH值和营养成分下其萌发状态和萌发率不同。该菌pH值为7，光照时间为20h的PDA培养基上培养所产生的孢子囊，在24℃条件下萌发率最高。此外，该菌在24-28℃条件下最易侵染荔枝果实，其发病最为严重。实验结果加深了对该病菌的了解，为进一步了解该病的发生危害提供了理论依据。

关键词: 糯玉米, 糯玉米, 区域试验, 品质评价

Abstract:

Abstract: The influencing factors on the mycelial growth, sporulation , sporangia germination and infection of Peronophthora litchtii were primarily studied. The result showed that the optimum conditions for the mycelia growth and spores formation of P. litchii were at 24℃ and under light for 20h. The optimum illumination on the mycelial growth and spores formation were under light for 20h and 16h separate. The lethal temperature of the sporangia was 45 ℃, keeping for 10 min. The results also showed that the germination form and rate of sporangia were different when they in various temperatures, illumination, pH values and nutrient compositions. The best germination rate of the sporangia was from the sporangia which were produced from the fungus cultured on PDA medium (pH7.0) at 24℃ and under light for 20h. And the disease was most serious when the fungus infested the lychee fruit at 24-28℃. The results got a better understanding this pathogen and provided the theoretical basis for understanding the occurrence and damage of the Litchi downy mildew disease.