|Title:||水稻不同齡期及品種對稻細菌性穀枯病菌之感病性||Other Titles:||The Susceptibility of Rice Plants at Different Growth Stages and of 21 Commercial Rice Varieties to Pseudomonas glumae||Authors:||簡錦忠
|Issue Date:||8-Sep-1987||Publisher:||農業試驗所||Journal Volume:||36||Journal Issue:||3||Start page/Pages:||302-310||Source:||中華農業研究||Abstract:||
The results showed that the pathogen didn’t affect the germination of rice seeds but caused seedlings to die about 98% when rice seeds were dipped in a water suspension of Pseudomonas glumae (108 cfu/ml) for 30 minutes prior to sowing. Rice plants inoculated with the suspension of P. glumae (108 cfu/ml) at booting stage by injection method, the panicles and sheaths of rice plants were all infected and discolored. However, the pathogen didn't infect the sheaths but the panicles when rice plants were inoculated at either botting or heading stage by spraying method. It was estimated that more than 60% of unfull grains were recorded when rice plants inoculated at booting stage by spraying method. The rice was more susceptible to isolate B24 or O1 from 4 days before heading to 2 days after heading, and to isolate B15 or B23 from 4 days before heading to 4 days after heading if inoculation was made at heading stage. Rice plants with a total of 21 commercial varieties were separately inoculated with 4 isolates of P. glumae for testing their susceptibilities to bacterial grain rot 10 days before heading. The results indicated that isolate B89 was the most virulent while the isolate B88 was the least. Among 21 rice varieties tested, Tainan 6 was the most susceptible variety which was reached 64.6% of the disease incidence, but Kaohsiung S. 7 was the most resistant variety, the disease incidence was averaged only 28.2%. Based on the significant interaction between rice varieties and pathogen isolates, the pathogen might exist differential strains in nature.
|Appears in Collections:||1.台灣農業研究(1950～迄今)|
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