Complete volume with articles 1 to 32 - Cucurbit Breeding - North ...
Complete volume with articles 1 to 32 - Cucurbit Breeding - North ... Complete volume with articles 1 to 32 - Cucurbit Breeding - North ...
Inhibition rate(%) 90 80 70 60 50 40 30 20 10 0 d d c c a a a a a a a a b b ab 3 4 5 6 7 8 9 10 11 12 pH B12 B13 Fig. 2. The effects of pH on inhibition rate of culture filtrates. Bars represent standard deviations of the means. Values followed by the same letters are not statistically different at P =0.05 according to Duncan’s multiple range test. 6 Cucurbit Genetics Cooperative Report 28-29:1-6 (2005-2006) b ab c c c
Systemic Resistance against Sphaerotheca fuliginea in Cucumber by Cell Fungal Fragments of Flammulina velutipes M. Liu and Q. Ma College of Plant Protection and Shaanxi Key Laboratory of Molecular Biology for Agriculture, Key Laboratory of Plant Protection Resources and Pest Management, Ministry of Education, Northwest A&F University, Yangling, 712100, P. R. China W. D. Fu Key Laboratory of Biological Control, Ministry of Agriculture, Institute of Agricultural Environment and Sustained Development, Chinese Academy of Agricultural Sciences, Beijing 100081 W. H. Tang China Agricultural University, Beijing 100094 Corresponding author: maqing@nwsuaf.edu.cn Abstract: Cellular fragments of the fungus Flammulina velutipes (JZGP), extraction of F. velutipes fermentation solution (JZG), Benzothiadiazoles (BTH, BION®), and KangDuFeng (KDF) were studied as candidates of SAR inducers in the cucumber-Sphaerotheca fuliginea system. The results demonstrated that the treatments of all candidate inducers placed on the first leaf of cucumber plants six days before challenging inoculation on the upper leaves with S. fuliginea, induced systemic resistance. Disease incidence and index were significantly lower when compared with the water-treated control. The systemic acquired resistance (SAR) levels induced by the JZGP solution diluted 500 times and the JZG treatment were higher than that elicited by KDF alone, but lower than the BTH treatment. Treatments with these inducers led to an increase in activities of chitinase and beta-1,3-glucanase in cucumber leaves compared with control plants, indicating that these inducers triggered SAR in the cucumber plants examined. The results of this study will assist in the exploitation of biological inducers of plant resistance in cucumber. Introduction: Powder mildew, caused by Sphaerotheca fuliginea, is a widely distributed and destructive disease of greenhouse and field-grown cucumber plants. The disease is typically controlled by fungicide applications. As the problems of the fungicide resistance and the pollution to the environment have become increasingly serious, alternative methods of protection are essential. Resistance can be systemically induced in plants by abiotic or biotic elicitor(s) (1,4-6,11,12). Among the abiotic compounds, salicylic acid (SA) was found to induce systemic resistance (SAR) to fungal, bacterial and viral pathogens. Benzothiadiazole (BTH) mimics SA, and is capable of inducing SAR. In 1996, BTH was introduced in Germany, and is now available as the commercial product BION®. Resistance inducing effects of this product have been demonstrated in plants against different crop diseases(2,7). Hijwegen and Verhaar demonstrated that three fungal culture filtrates were able to induce resistance to Peronospora parasitica in red cabbage reducing disease incidence by 52% (8). Based on our research investigating the active component of cellular fragment of Flammulina velutipes (JZGP), the active extracted component of F. velutipes fermentation is proteoglycan. Biochemical changes associated with induced systemic resistance, including Cucurbit Genetics Cooperative Report 28-29: 7-11 (2005-2006) 7
- Page 1 and 2: Cucurbit Genetics Cooperative 28-29
- Page 3 and 4: NEWS & COMMENT v 30th Annual CGC Bu
- Page 5 and 6: 30th Annual CGC Business Meeting (2
- Page 7 and 8: and emerging problems facing the se
- Page 9 and 10: • R.L. Hassell, J. Schultheis, W.
- Page 13 and 14: Control of Cucumber Grey Mold by En
- Page 15 and 16: Discussion: Microbial endophytes ar
- Page 17: Table 2. The effects of endophytic
- Page 21 and 22: Results: Systemic induced resistanc
- Page 23 and 24: Table1. Effects of inducers on the
- Page 25 and 26: on visual appearance, cavities appe
- Page 27 and 28: Literature Cited: 1. Danin-Poleg, Y
- Page 29 and 30: A Recessive Gene for Light Immature
- Page 31 and 32: SNP Discovery and Mapping in Melon
- Page 33 and 34: Table 1. Genes associated with carb
- Page 35 and 36: used to check the marker order. Map
- Page 37 and 38: 0 130 0 40 8 1 OJ04.1000 OH03.500 O
- Page 39 and 40: the >Deltex= x TGR1551 cross in the
- Page 41 and 42: Number of F2 plants Number of F2 pl
- Page 43 and 44: Mapping of QTL for Fruit Size and S
- Page 45 and 46: Table 2. Simple linear regression (
- Page 47 and 48: Grafted Watermelon Stand Survival A
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- Page 51 and 52: Rootstock Effects on Plant Vigor an
- Page 53 and 54: Diann Baze and Dr. Benny Bruton for
- Page 55 and 56: Pilot Survey Results to Prioritize
- Page 57 and 58: Table 1. Results of the research ne
- Page 59 and 60: A New Male Sterile Mutant Identifie
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- Page 63 and 64: Figure 1. Comparison of pale green
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- Page 67 and 68: dominance being the largest gene ef
Inhibition rate(%)<br />
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Fig. 2. The effects of pH on inhibition rate of culture filtrates. Bars represent standard<br />
deviations of the means. Values followed by the same letters are not statistically different at P<br />
=0.05 according <strong>to</strong> Duncan’s multiple range test.<br />
6 <strong>Cucurbit</strong> Genetics Cooperative Report 28-29:1-6 (2005-2006)<br />
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