Effect of insect on phenolic compounds and nitrogen concentrations in leaves of Populus euphratica under different water conditions

Abstract

Abstract: The objectives of this study were to investigate the effect of insect and soil water contents on phenolic compounds and nitrogen concentrations in leaves of Populus euphratica. Our results showed that total phenolic concentration of insect damage leaves（10%-15%）in condition without river flooding was significantly higher than that of insect damage leaves（10%-15%） in condition with river flooding; condensed tannins of healthy leaves and insect damage leaves（<10%）in condition with river flooding were significantly higher than that of healthy leaves and insect damage leaves（<10%）in condition without river flooding; flavonoids of insect damage leaves（<10% & 10%-15%）in condition with river flooding were significantly higher than that of healthy leaves and insect damage leaves（<10%）in condition without river flooding; leaf nitrogen concentrations in condition with river flooding were higher than that in condition without river flooding. Insect damage increased phenolic compounds and nitrogen concentrations. Populus euphratica will allocate available resource based on insect damage degree and resource competition stress to respond environmental stress.

Wang Yan, Li Junqing, Tan Zhigang, A Mugulang, Bai Tong. Effect of insect on phenolic compounds and nitrogen concentrations in leaves of Populus euphratica under different water conditions[J]. Chinese Agricultural Science Bulletin, 2009, 25(12): 69-74.

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