Identification of resistance of cucumber seedlings to Phytophthora melonis and related defense enzyme activity changes
Journal Title: 广东农业科学 - Year 2018, Vol 45, Issue 7
Abstract
The aim of our study is to investigate the resistance of different cucumber varieties to Phytophthora melonis, and the changes of related defense enzyme activity by inoculated with about 5×103/mL suspension of P. melonis. Seven cucumber cultivars were selected for disease resistance screening, Changchunmici, Huaqingdadiaogua, Kangbing NO.2, Zaoqing NO.2, Zhongnong NO.20, Jinyou NO.1 and Yuexiu NO.3. The results showed that four middle resistant varieties were found, respectively Changchunmici, Huaqingdadiaogua, Kangbing NO.2 and Yuexiu NO.3, the other varieties showed susceptible to P. melonis, no immune and high resistant varieties were found. On uninoculated conditions, middle resistant variety Huaqingdadiaogua had higher activities of peroxidase （POD）, polyphenoloxidase（PPO）, phenylalnine ammonialyase（PAL）and β-1, 3-glucanase（GLU）than susceptible variety Zhongnong NO.20. After inoculation, only POD and PAL activities increased greatly in middle resistant variety, and other related defense enzyme activities kept stable. However, activities of POD, PPO, PAL and GLU all increased significantly in susceptible variety, and the increase degree was higher than that in middle resistant variety. In concluded, middle resistant variety mainly induced cell wall synthesis related enzyme, and thus prevented further invasion and spreading of the pathogen, however, related defense enzyme activities in susceptible variety increased greater.
Authors and Affiliations
Xi-rong CHAI, Yun-yan KANG
Keywords
Related Articles
- EP ID EP600984
- DOI 10.16768/j.issn.1004-874X.2018.07.003
- Views 32
- Downloads 0
Selection of suitable flue-cured tobacco varieties for Qianxi county
"Abstract：In order to select the varieties of flue-cured tobacco suitable for planting in Qianxi County, and promote the sustainable development of tobacco production, the botanical, agronomic, economic and qualitative...
Study on the production process of kapok dry flower
"In order to enrich the varieties of dried flowers on the market and meet people's needs for dried flowers, this article explored the production process of dried kapok flowers. The flowers were pretreated by Ethanol and...
Dynamic change of canopy characteristic parameter of flue-cured tobacco with different planting density in high mountainous area of northern Guizhou
"Canopy characteristic parameters with different planting density at different growth stages were investigated systematically in order to explore dynamic change of canopies characteristic of flue-cured tobacco in high mo...
Impact of the aquaculture water of higher-place shrimp ponds on nutrients within the soil within trenchv
This study aimed at monitoring and analyzing the physicochemical indices of aquatic water for prawn rearing, as well as nutrients within the soil in sewage disposal trenches, thus selected a higher-place shrimp ponds in...
Overview and feature analysis of agricultural non-point source pollution in Guangzhou
"In order to understand the characteristics of agricultural non-point source pollution（ANPSP） and make reasonable pollutant control strategies in Guangzhou，taking prefecture city as basic unit，the equivalent standard...