According to their inhibitory effect on the radicle growth,the isolates could be divided into five groups(Ⅰ-Ⅴ), whose inhibitory effect on the radicle growth was 14.7%,26.0%,34.7%,45.0% and 68.7%,respectively.
Culture filtrates and cercosporin solution could inhibit the radicle growth on the seeds of different rice varieties and 4 crops (mungbean, sorghum, cowpea and corn).
According to the inhibltory effect of culture filtrates on the radicle growth, the isolates could be divided into 4 groups (Ⅰ—Ⅳ)whose inhibitory effects were 7.7%, 18.4%, 62.5%, 100% (radicle growth rate), respectively.
sanguinalis root. At 150μg/mL concentration, the inhibition of the toxin to root elongation reached 44.59%. Helminthosporin showed impact on photosynthetic pigment content of D.
The experiment of growth restrain indicated that growth restrain ratio of radicle was appropriate to be used in the mensuration of biological activity because inhibition of the rough ustiloxins to the embryo was significantly weaker than to the radicle, possibly its directly touching the ustiloxins.
The culture filtrate of JF-12 isolate was tested on the inhibition rate of embryonic root growth of 7 wheat varieties. The results showed that the inhibition rate of susceptible varieties was significantly higher than that of resistant varieties.
It is suggested that it has a possibility for using the method of testing the inhibition rate of peaembryonic root growth by toxins to indirectly detect the disease resistance of pea cultivars to this fun-gus instead of using the method with alive pathogen infection.
Photosynthesis function in seeds might also promoted radicle growth and seedling establishment.
This difference does not develop until after 12 hours of imbibition at 27°, which is the time of onset of germination and radicle growth.
The seeds were germinated in various concentrations of sodium chloride and their germination, seedling radicle growth, and dark respiration studied.
Aqueous extracts of various plant parts, field soils and decaying mulch significantly reduced germination, radicle growth and water contents of all test species.
Heavier seeds (seeds from older plants) also had the highest root radicle growth rates.
Cercospora oryzae Miyake is the pathogen of the narrow brown leaf spot of rice. Twenty four isolates were screened by the bioassay of root growth inhibition for toxin production. The majority of culture filtrates exhibited the inhibitory effect on the radicle growth of rice seeds. Six isolates: I-16, I-26, I-28, I-38, I-42 and I-49 were selected for further study. Potato sucrose broth plus 10% rice juice (PSBE) favored isolate growth and toxin production. The ranges of optimum temperature and pH for growth were...
Cercospora oryzae Miyake is the pathogen of the narrow brown leaf spot of rice. Twenty four isolates were screened by the bioassay of root growth inhibition for toxin production. The majority of culture filtrates exhibited the inhibitory effect on the radicle growth of rice seeds. Six isolates: I-16, I-26, I-28, I-38, I-42 and I-49 were selected for further study. Potato sucrose broth plus 10% rice juice (PSBE) favored isolate growth and toxin production. The ranges of optimum temperature and pH for growth were 25—30℃ and pH 6—7 respectively. Light and aeration could stimulate growth. Temperature, light and aeration had no effect on the toxicity of the culture filtrates. The culture filtrates from culture at pH 6—7 showed the highest toxicity to radicle growth. The highest toxicity of culture filtrates occurred on the third week after inoculation, while the growth peak for most of isolates were on the fourth week. Partial characterization of the toxin was undertaken. The results illustrated that 6 isolates were capable of producing red pigment and yellow substance. Bed pigment was identified as cercosporin by thin layer chromatography, visible spectrum analysis and color reaction. Culture filtrates and cercosporin solution could inhibit the radicle growth on the seeds of different rice varieties and 4 crops (mungbean, sorghum, cowpea and corn). It also could induce chlorosis and necrosis on the injured leaf surface of rice seedings regardless of the varietal resistance, susceptibility, and seedling age.
Alternaria solani is a pathogen that causes the early blight of tomato and potato.One hundred thirty five isolares were tested by the bioassay of tomato radicle growth inhibition for their toxigenicity.The results showed that the isolate ucltures differed in their toxicity significantly.According to their inhibitory effect on the radicle growth,the isolates could be divided into five groups(Ⅰ-Ⅴ), whose inhibitory effect on the radicle growth was 14.7%,26.0%,34.7%,45.0% and 68.7%,respectively.In addition,there...
Alternaria solani is a pathogen that causes the early blight of tomato and potato.One hundred thirty five isolares were tested by the bioassay of tomato radicle growth inhibition for their toxigenicity.The results showed that the isolate ucltures differed in their toxicity significantly.According to their inhibitory effect on the radicle growth,the isolates could be divided into five groups(Ⅰ-Ⅴ), whose inhibitory effect on the radicle growth was 14.7%,26.0%,34.7%,45.0% and 68.7%,respectively.In addition,there was statistically significant difference in the toxicity between filtrate extract and mycelia extract whose inhibitory effect was 50.6% and 42.7%,respectively,due to the different toxins in the two extracts. Although the four strongly toxigenic isolates,No.28,51,77 and 89 differed in their mycelial dry weight,crude yield,and fluorescent intensity,their effect on the radicle growth showed no significant difference.
Twenty isolates of Piricularia oryzae cultured in potato sucrose solution were tested for toxicity of their culture filtrates by bioassay of rice radicle growth inhibition. The results showed the significant difference intoxicity among the culture filtrates. According to the inhibltory effect of culture filtrates on the radicle growth, the isolates could be divided into 4 groups (Ⅰ—Ⅳ)whose inhibitory effects were 7.7%, 18.4%, 62.5%, 100% (radicle growth rate), respectively. In addition the toxicity of culture...
Twenty isolates of Piricularia oryzae cultured in potato sucrose solution were tested for toxicity of their culture filtrates by bioassay of rice radicle growth inhibition. The results showed the significant difference intoxicity among the culture filtrates. According to the inhibltory effect of culture filtrates on the radicle growth, the isolates could be divided into 4 groups (Ⅰ—Ⅳ)whose inhibitory effects were 7.7%, 18.4%, 62.5%, 100% (radicle growth rate), respectively. In addition the toxicity of culture filtrates would decrease with the increase in mycelial growth and pigmentation for the toxigenic isolates.
胚根生长
radicle growth
查询“胚根生长”译词为用户自定义的双语例句
相关查询
2008 CNKI－中国知网