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为了阐述鸭脚树星室木虱为害对糖胶树生理生化指标的影响,寻找有效的防虫途径,提高糖胶树绿化及药用价值,研究了鸭脚树星室木虱为害对糖胶树叶绿素含量和光合速率的影响。结果表明,鸭脚树星室木虱为害后糖胶树净光合速率(Pn)、气孔导度(Cs)和蒸腾速率(Tr)均明显下降。其中受鸭脚树星室木虱为害形成虫瘿而未出现羽化孔的叶片和已有较多羽化孔的叶片与CK相比,Pn下降率分别为38.72%和51.94%;叶绿素a、叶绿素b及叶绿素总含量也明显下降,受害形成虫瘿而未出现羽化孔的叶片和已有较多羽化孔的叶片与CK相比叶绿素总含量分别下降了52.77%和61.74%。说明鸭脚树星室木虱为害对糖胶树的叶绿素含量和光合参数产生明显影响。其原因可能是鸭脚树星室木虱为害糖胶树时破坏了植物叶片的叶肉组织,从而减少叶绿素含量,降低植物光合速率。
In order to elucidate the physiological and biochemical indexes of the gum tree in the field of P. xylostella, find out the effective ways of preventing insect and improve the greening and medicinal value of the gum tree, Chlorophyll content and photosynthetic rate. The results showed that the net photosynthetic rate (Pn), stomatal conductance (Cs) and transpiration rate (Tr) of A. tataricolus were significantly decreased after P. xylostella infestation. Among them, the Pn descended 38.72% and 51.94%, respectively, compared with CK in the leaves without emergence holes and those with more emergence holes. The chlorophyll a, chlorophyll b And the total content of chlorophyll also decreased significantly. Compared with CK, the total content of chlorophyll decreased by 52.77% and 61.74%, respectively, in the leaves without emergence holes and those with more emergence holes. Explain duck foot tree star psylla damage on the gum tree chlorophyll content and photosynthetic parameters have a significant impact. The reason may be duck feet tree star psylla harm gum plant destruction of plant leaf mesophyll tissue, thereby reducing the chlorophyll content and reduce plant photosynthetic rate.