[1]申娜娜,侯喜林.不结球白菜感染霜霉病菌后防御物质及酶的变化[J].南京农业大学学报,2009,32(1):23-26.[doi:10.7685/j.issn.1000-2030.2009.01.005]
 SHEN Shan-na,HOU Xi-lin.Changes of protective substances and enzymes in non-heading Chinese cabbage after infection by downy mildew[J].Journal of Nanjing Agricultural University,2009,32(1):23-26.[doi:10.7685/j.issn.1000-2030.2009.01.005]
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不结球白菜感染霜霉病菌后防御物质及酶的变化()
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《南京农业大学学报》[ISSN:1000-2030/CN:32-1148/S]

卷:
32卷
期数:
2009年1期
页码:
23-26
栏目:
出版日期:
2009-02-28

文章信息/Info

Title:
Changes of protective substances and enzymes in non-heading Chinese cabbage after infection by downy mildew
作者:
申娜娜侯喜林
南京农业大学作物遗传与种质创新国家重点实验室,江苏南京210095
Author(s):
SHEN Shan-na HOU Xi-lin
State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing 210095, China
关键词:
不结球白菜 霜霉病 叶绿素 可溶性糖 木质素 SOD 几丁质酶
Keywords:
non-heading Chinese cabbage downy mildew chlorophyll soluble sugar lignin SOD chitinase
分类号:
S436.34
DOI:
10.7685/j.issn.1000-2030.2009.01.005
文献标志码:
A
摘要:
采用不同霜霉病抗性的不结球白菜自交系,研究了其对霜霉病的抗性机制。结果表明:在接种病原菌前,不结球白菜健康叶片中木质素含量与霜霉病的抗性成正相关,几丁质酶与霜霉病抗性没有明显的相关性。接种后抗病材料叶片中的木质素含量呈现出快速上升、下降、再上升、再下降的趋势,分别在接种后24 h和96 h达到峰值;而感病材料变化缓慢,变化幅度小,在36 h达到峰值。接种后抗病材料的几丁质酶变化迅速,且长时间处于高活性,在48 h达到峰值;相比之下,感病材料的酶活性增高的幅度小,高活性维持时间短,在36 h达到峰值。上述结果表明,叶片中的木质素含量和几丁质酶活性的动态变化,是植物抗性潜能被激活的结果,是诱导抗性机制的一部分。
Abstract:
Inbred lines of non-heading Chinese cabbage with different resistance to downy mildew were conducted for studying the metabolism of resistance to downy mildew. As shown by the result, before the inoculation, the lignin contents in healthy leaves were positive correlated to the resistance to downy mildew of inbred lines of non-heading Chinese cabbage, while there was no obvious correlation between chitinase activities and the resistance to downy mildew of inbred lines. According to the results, after the inoculation, the lignin contents in resistant lines increased rapidly prior to decrease slowly, and then they increased again prior to decrease again, leading to two peaks at 24 h and 96 h after inoculation. The lignin contents in susceptible lines had a slow change with only one peak at 36 h after inoculation. The chitinase activities in resistant lines had a rapid change and a long time with high activities, resulting in a peak at 48 h after inoculation while the chitinase activities in susceptible lines had a slow change and a peak at 36 h after inoculation. The above results indicated that activation of resisted potential of plants led to the increase of lignin content and chitinase activities, which belonged to the metabolism of inducing resistance.

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备注/Memo

备注/Memo:
教育部高等学校博士点基金项目(20030307021)
更新日期/Last Update: 2009-02-28