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首页> 外文期刊>Journal of the American Society for Horticultural Science >Alterations in anatomy and ultrastructure of pecan leaves treated with propiconazole during shoot expansion
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Alterations in anatomy and ultrastructure of pecan leaves treated with propiconazole during shoot expansion

机译：用丙环唑处理的山核桃枝条膨大过程中解剖和超微结构的变化

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摘要

Propiconazole, a triazole fungicide, has been reported to inhibit leaf expansion in pecan [Carya illinoensis (Wangenh.) K. Koch] trees when applied under field conditions. This study was conducted to determine the effect of propiconazole on pecan leaf morphology and structure using light and transmission electron microscopy. Mature pecan trees were sprayed once or three times per week from budbreak to pollen maturity. Fungicide sprays resulted in significantly reduced leaf area. Compared to controls, leaves from propiconazole-treated shoots had alterations in cell arrangement characterized by more tightly packed palisade parenchyma cells with fewer intercellular spaces; neither leaf thickness nor palisade or spongy layer thickness were affected. Propiconazole caused modifications in the chloroplasts, with a tendency for internal membranes to be less defined, and for thylakiods to exhibit less stacking. The extent of structural changes was related to fungicide dosage. Results show that propiconazole applications during leaf development can inhibit leaf expansion and modify cellular organization of the mesophyll cells. Chemical name used: 1-[[2-(2,4-dichlorophenyl)-4-propyl-1,3-dioxolan-2-yl] methyl]-1H-1,2,4-triazole (propiconazole).
机译：据报导，在野外条件下施用丙吡唑（三唑类杀菌剂）可抑制山核桃树（美洲山核桃（Wangenh。K. Koch））中的叶片膨胀。进行了这项研究，以利用光和透射电子显微镜确定丙环唑对山核桃叶形态和结构的影响。从花蕾到花粉成熟，成熟的山核桃树每周喷洒一到三次。喷洒杀真菌剂可显着减少叶片面积。与对照相比，经丙环唑处理的枝条叶片的细胞排列发生变化，其特征是栅栏薄壁细胞排列更紧密，细胞间空间更少。叶片厚度，木栅栏或海绵层厚度均未受影响。丙哌唑引起叶绿体的修饰，内膜趋向于不清晰，噻虫类表现出较少的堆积。结构变化的程度与杀菌剂的用量有关。结果表明，丙康唑在叶片发育过程中的应用可以抑制叶片膨胀并改变叶肉细胞的细胞组织。使用的化学名称：1-[[[2-（2,4-二氯苯基）-4-丙基-1,3-二氧戊环-2-基]甲基] -1H-1,1,2,4-三唑（丙环唑）。

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