| 摘要: |
| 采用人工接螨 ,测定幼树叶片的主要生理参数 ,同时结合叶螨危害程度不同路段的国槐行道树叶片的生理参数测定结果 ,研究截形叶螨危害对国槐叶片生理的影响。结果表明 ,受叶螨危害叶片中叶绿素含量减少 33.5%～ 53.4% ,光合强度降低 42 .3%～54.5% ,国槐行道树受害叶片的光合强度降低达 74.0 % ;过氧化氢酶活性降低 63.1 %～94.2 % ;气孔传导率下降为 1 9.9%～ 2 2 .0 % ;蒸腾强度也显著下降。由此可见 ,截形叶螨危害致使国槐叶片生理和代谢发生紊乱是造成西安市国槐行道树夏季落叶的内在原因之一。 |
| 关键词: 截形叶螨,国槐,生理参数 |
| DOI： |
| 分类号:S731.2;;S792.26; |
| 基金项目:西安市科技攻关项目(XK91-003) |
|
| Effects of spider-mite damage on Chinese scholar-tree leaves |
|
TANG Zhou huai 1 ZHANG Ya li 2 GUO Xiao xia 1 WEI Tian xing 2 FAN Xiao yi 2 JIN Meng lin 2
|
| Abstract: |
| Tetranychus truncatus Ehara caused the summery drop leaves of Chinese
Scholar-trees in the streets of Xian by damaging physiologic and metabolic disturbance
of their leaves.The researchers took the following measure:spider-mites were inoculated
on potted young trees and let the mites breed naturally.Thus different damaged terraces
were produced among treatments, meanwhile the researches detected the result
according to physiologic reference difference of Chinese Scholar-tree leaves damaged by
the mites. From which they researched effects of mites on the trees leaves. The result
showed: chlorophyll content of damaged leaves by mites reduced to 33. 5% -53. 4%;
photosynthetic intensity reduced to 42. 3% -54. 5%; hydrogen peroxidase reduced to
63. 1% - 94. 2%; breathing-pore conductivity reduced to 19. 9% - 22. 0%; steam
intensity also reduced obviously. |
| Key words: Tetranychus truncatus Ehara,Chinese Scholar tree,physiologic influence |
