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水稻接种潜根线虫（Ｈｉｒｓｃｈｍａｎｎｉｅｌａｓｐｐ）后，叶绿素含量（Ｃｈｌ．）、过氧化物酶（ＰＯＤ）活性、细胞膜伤害指标丙二醛（ＭＤＡ）含量出现明显病变。接虫期（萌芽后２５～６５ｄ），接虫量（０～４０００头／盆）对叶绿素含量产生不同影响。分蘖期接虫株单位鲜重和单位面积叶绿素含量较之健株下降３７．５％（下降范围６．６％～５８．４％）和４５．８％（下降范围３０．０％～６７．２％），尤以接虫早、接虫量高的接虫株下降剧烈；同期病株ＰＯＤ活性和ＭＤＡ含量呈上升趋势，特别是ＭＤＡ含量上升显著。拔节期后叶绿素含量回升，单位鲜重和单位面积分别上升６．７％和２．３％，田间出现复绿现象，部分重病株没有出现叶绿素含量回升和田间复绿。拔节期病株ＰＯＤ活性大幅度升高，其酶活力和酶比活力分别高出健株２２４．９％和８４．０％，但病株ＭＤＡ值上升势头减弱。另外以上３项指标消涨有较强的相关性。
After inoculated with Hirschmannielaspp, the contents of chlorophyll (Chl.), Peroxidase (POD) and malondialdehyde (MDA) in cell membrane were obviously changed. The period of pick-up (25-65 days after germination) and the amount of pick-up (0-4000 heads / pot) had different effects on chlorophyll content. At the tillering stage, the fresh weight per plant and chlorophyll per unit area decreased by 37.5% (ranged from 6.6% to 58.4%) and 45.8% (ranged from 30.0% to 67%). 2%). Especially, the worm-connected plants with early pick-up and high pick-up were greatly decreased. The activity of POD and the content of MDA increased at the same period, especially the content of MDA increased significantly. After jointing stage, the content of chlorophyll increased, the unit fresh weight and unit area increased by 6.7% and 2.3% respectively. The phenomenon of re-green appeared in the field. The chlorophyll content did not rise and the field was re-green in some seriously ill plants. The activity of POD at jointing stage increased significantly, and its activity and enzyme activity were 224.9% and 84.0% higher than that of healthy plants, respectively. However, the increase of MDA in diseased plants was weakened. In addition the above three indicators have a stronger correlation.