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首页> 外文期刊>European Journal of Plant Pathology >Influence of drought and season on compartmentalization of black locust (Robinia pseudoacacia L.) inoculated with Armillaria mellea
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Influence of drought and season on compartmentalization of black locust (Robinia pseudoacacia L.) inoculated with Armillaria mellea

机译：干旱季节对黑蝗虫（Robinia Pseudoacacia L.）接种的影响

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摘要

Effective compartmentalization of wounds in trees prevents the spreading of decay in wood. Climate extremes including drought can reduce the ability of trees to compartmentalize. In addition, compartmentalization of winter wounds is considered to be weaker than of summer wounds. A combination of drought-stress, winter injury and infection can entirely prevent the compartmentalization and can thus be the major cause for declining tree vitality. For deeper insight into the interaction of climate extremes such as drought and defense responses of trees, the defense reactions of black locust (Robinia pseudoacacia L.) saplings, both well-watered and drought-stressed, to wounding or the pathogen Armillaria mellea were studied. The pathogen was inoculated either in the growth period or during dormancy. All saplings were harvested at the same time, thus, 24 months after inoculation during the growing season and 18 months after inoculation during dormancy, and the extent and effectiveness of compartmentalization were analyzed. Regardless of the season of wounding and infection, the axial spread of discoloration was significantly shorter and the woundwood was almost twice as thick in well-watered compared to drought-stressed saplings. In drought-stressed saplings inoculated in the dormant season, the wounds were not at all sealed and compartmentalized. In these saplings, the presence and spread of the pathogen could be confirmed in the surrounding tissues of the wound. In contrast, the pathogen was not confirmed in tissues of well-watered and drought-stressed saplings inoculated in the active season. To conclude, the well-watered saplings were better able to compartmentalize, and the drought-stressed saplings inoculated in the dormant season, were weakest against wounding and infection and failed to compartmentalize effectively.
机译：树木中伤口的有效隔间化可防止腐烂在木材中的蔓延。气候极端包括干旱可以降低树木划分的能力。此外，冬季伤口的卧室化被认为比夏季伤口弱。干旱胁迫，冬季损伤和感染的组合可以完全防止舱室化，因此可以是树脂生命力下降的主要原因。为了深入了解气候极端的互动，如树木的干旱和防御反应，黑蝗虫（Robinia Pseudoacacia L.）树苗的防御反应，既有浇水和干旱胁迫，都研究过润泽或病原体阿米利亚。病原体接种在生长期或休眠期间。所有树苗都是同时收获的，因此，在生长季节期间接种后24个月，在休眠期间接种后18个月，分析了分区的程度和有效性。无论伤口和感染的季节如何，与干旱胁迫的树苗相比，变色的轴向扩散显着较短，伤口木材几乎是浇水井中厚度的两倍。在休眠季节接种的干旱压力的树苗中，伤口根本不密封和舱室化。在这些树苗中，可以在伤口的周围组织中确认病原体的存在和扩散。相比之下，在活性季节的良好浇水和干旱胁迫的树苗组织中未确认病原体。为了得出结论，浇水的树苗更好地能够划分，并且在休眠季节接种的干旱胁迫的树苗是抗伤害和感染的最弱性，并且有效地划分。

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