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題 名 | Chitinase Isoenzymes in Near-Isogenic Wheat Lines Challenged with Russian Wheat Aphid, Exogenous Ethylene, and Mechanical Wounding=接近相同基因之小麥系當以俄國小麥蚜蟲、外加乙烯和機械傷害處理時之幾丁酵素同功酶之分析 |
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作 者 | Botha,A-M.; Nagel,M. A. C.; Van der Westhuizen,A. J.; Botha,F. C.; | 書刊名 | Botanical Bulletin of Academia Sinica |
卷 期 | 39:2 1998.04[民87.04] |
頁 次 | 頁99-106 |
分類號 | 434.124 |
關鍵詞 | 幾丁酵素表現; 乙烯; 水解酵素; 等電點聚焦; 同功酶; 機械傷害; 俄國小麥蚜蟲感染; Chitinase expression; Ethylene; Hydrolase; Isoelectric focusing; Isoenzymes; Mechanical wounding; Russian wheat aphid infestation; |
語 文 | 英文(English) |
中文摘要 | 俄國小麥蚜蟲(RWA)感染、乙烯處理和機械割傷導致接近相同基因之小麥系但抗RWA 或不耐 RWA 者有幾丁酵素同功�t(EC 3.2.1.14)之不同表現。等電聚焦(IEF)和非變性之IEF顯示多種幾丁酵素同功�t之存在:pI從9.7(鹹性)到3.4(acidic)。在IEF膠體上未處理之抗RWA者和不耐RWA者可看到7個酵素帶(pI值約為9.5,9.2,8.8,8.5,8.4,7.8及5.0)。RWA感染導致一條額外酵素帶(pI約為5.5),而乙烯處理導致二條額外酵素帶(pI約4.1及6.8)。機械傷害也導致pI 4.1之酵素帶新出現。在液態之IEF証實IEF膠體所得之多條酵素帶。控制組之植物在液態IEF出現5個幾丁酵素之高峰(pI分別為9.2,7.8,5.0,4.1和3.6)。RWA感染、乙烯處理和機械割傷導致額外酵素峰之出現。這些接近相同基因之小麥系之間也有幾丁酵素之差異表現。 |
英文摘要 | Russian wheat aphid (RWA) infestation, ethylene exposure, and mechanical wounding resulted in differential expression of chitinase (EC 3.2.1.14) isoenzymes in near-isogenic wheat lines susceptible and resistant to the RWA. Isoelectric focusing (IEF) and non-denaturing IEF gels revealed the existence of multiple isoenzymes of chitinase with a wide range of isoelectric points, ranging from 9.7 (basic) to 3.4 (acidic). Seven bands were observed in the resistant and susceptible untreated plants (pI values of approximately 9.5, 9.2, 8.8, 8.5, 8.4, 7.8 and 5.0) on IEF gels. RWA infestation resulted in the expression of an additional band (approximately pI 5.5) whereas ethylene exposure resulted in the induction of two additional isoenzymes (approximately pI 4.1 and 6.8). Mechanical wounding also induced the isoenzyme with pI of 4.1. Isoelectrical focusing (IEF) in liquid medium confirmed the multiple isoenzymes obtained with IEF gels. Five different peaks with chitinase activity were detected in control plants (pI values of 9.2, 7.8, 5.0, 4.1, and 3.6) after IEF. RWA infestation, ethylene and mechanical wounding caused the induction of additional isoenzyme peaks. Differential expression of chitinolytic activity was also observed between the near-isogenic wheat lines. |
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