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題名 | 稻種感染徒長病菌與成株水稻發生徒長病之關聯=The Correlation between Seed Inoculated with Fusarium fujikuroi and Bakanae Disease Symptom Occurring on Adult Rice Plants |
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作者 | 許晴情; 賴明信; 林宗俊; 黃振文; 陳啟予; | 書刊名 | 植物病理學會刊 |
卷期 | 22:4 2013.12[民102.12] |
頁次 | 頁381-388 |
分類號 | 434.111 |
關鍵詞 | 水稻徒長病; 發病過程; 成株病徵之成因; Rice bakanae disease; Development of symptoms; Cause of adult symptom; |
語文 | 中文(Chinese) |
中文摘要 | 水稻徒長病一直被視為種子傳播之病害,病原菌感染稻種後會造成苗期之徒長病徵;然而稻種感染是否有可能延續到水稻成株再發病,為本研究希望釐清之問題。本實驗將種子接種而苗期發病之植株,區分單本植、雙本植進行移植。結果發現,發病之幼苗以單本植移植過後,外觀皆恢復正常直至結穗,其中有22.2%地基部具有不正常分糱之現象,而77.8%地基部仍正常分糱;而發病之幼苗以雙本植移植過後,有12.5%死亡,70.8%外觀恢復正常直至結穗、8.3%外觀恢復正常直至結穗但地基部具不正常分糱、以及8.3%初期恢復正常,但地基部具不正常分糱,且在抽穗期呈現徒長病之地上部病徵。由結果顯示種子感染水徒長病菌可造成成株發病,而以較密植(雙本植)之栽種方式有較高之成株發病機會。總結,水稻在幼苗發生徒長病後,有些受病原菌危害而死亡、有些完全恢復正常沒有遺留不良影響、有些外觀恢復正常但地基部具不正常分糱、有些有不正常分糱並在抽穗期再度發病。 |
英文摘要 | Rice bakanae disease, caused by Fusarium fujikuroi, has long been considered to be a seed borne disease. Undoubtedly pathogen-infected seeds will lead to disease seedlings. The question, whether a F. fujikuroi infected seed can result in the adult rice plant to contract the disease, needs to be clarified. In this study, rice seeds were inoculated with the pathogen and disease seedlings of 21-day-old were transplanted in two separate ways, single transplanting and double transplanting. The data showed that in single transplanting treatment disease seedlings would turn to healthy appearance and live well to fruiting. However 22.2% of these rice plants have abnormal tillering. In double transplanting treatment, 12.5% of disease seedling died, 70.8% turned to healthy appearance until fruiting, 8.3% turned to healthy appearance until fruiting but with abnormal tillering, and 8.3% turned to healthy appearance at first but ended up to appear bakanae disease with persistent abnormal tillering. The result suggests that seeds infected by F. fujikuroi can lead to the occurrence of bakanae disease on adult rice plants, and the ways of transplanting can affect the rate of bakanae disease occurrence, with denser transplanting having higher occurrence. In conclusion, there are four possible destinations for rice seedlings that have been contracted with F. fujikuroi through seed infection. Some seedlings will die, some will totally recover without any detrimental effect, some will turn to healthy appearance but with abnormal tillering, and some will initially turn to healthy appearance with abnormal tillering then eventually have bakanae disease symptom. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。