Photosynthesis and translocation of assimilates in rice plants following phloem feeding by the planthopper Nilaparvata lugens (Homoptera: Delphacidae)
Photosynthesis and translocation of assimilates in rice plants following phloem feeding by the planthopper Nilaparvata lugens (Homoptera: Delphacidae)
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DOI：
10.1603/0022-0493-93.4.1192
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发表时间：
2000-08-01
影响因子：
2.2
通讯作者：
Kitagawa, H
中科院分区：
文献类型：
--
作者：
Watanabe, T;Kitagawa, H
研究了褐飞虱取食对水稻光合作用和同化物运转的影响。我们使用成熟的粳稻植株，并应用（13）CO（2）喂养方法来评估这些生理效应。光合速率受N.在孕穗期，褐飞虱的侵染率比对照低30%，尤其是在下部叶位。叶片氮浓度也低于对照植物。开花后，叶绿素含量和植株总干重均比对照降低。lugens。N处理显著降低了茎鞘干重。而穗干重不受影响。即使向受侵染的叶片供应~（13）CO ~（2），也没有发现对同化物转运的干扰作用。结果表明，氮素对光合作用的影响主要表现在同化物的清除和光合作用的降低。与同化物转运的中断相比，褐飞虱对水稻植株的生长和产量的影响最大。植物死亡可发生在赖氨酸N。如果所提供的能量少于维持组织所需的能量，则为褐飞虱侵染。
Experiments were conducted to measure the effect of feeding by the planthopper Nilaparvata lugens (Stal) on photosynthesis and the translocation of assimilates in rice plants, Oryza sativa L. We used mature japonica rice plants and applied the (13)CO(2) feeding method to evaluate those physiological effects. The photosynthetic rate was suppressed br N. lugens infestation, especially at the lower leaf position, with rates 30% lower than that of control plants at tie booting stage. Leaf nitrogen concentration in infested plants was also lower than that in control plants. After flowering, the chlorophyll content and total plant dry weight were reduced Ly N. lugens. stem and sheath dry weights were significantly reduced by N. lugens infestation, whereas panicle dry weight was not affected. Little effect was found on disruption in translocation of assimilates, even when (13)CO(2) was supplied to the infested leaves. Results suggested that removal of assimilates and reduction in photosynthesis by N. lugens have the greatest effect on growth and yield of rice plants as compared with the disruption in the translocation of assimilates. Plant death can occur Ly N. lugens infestation if the amount of energy supplied is less than that required for tissue maintenance.