Ditylenchus destructor: Effects on the Cell Structure and the Physiological Characteristics of Angelica sinensis

doi:10.11923/j.issn.2095-4050.cjas2020-0087

Abstract

Abstract:

To determine the changes of root cell structure and leaf physiological characteristics of Angelica sinensis after infected with Ditylenchus destructor, ‘Mingui 1’ and D. destructor were used in this study. The cell structure of roots and the physiological characteristics of leaves were tested in filed by natural diseased condition. Microscopic observation showed that the cell structure of the diseased roots were seriously damaged and broken after infected with D. destructor. The chlorophyll content in diseased leaves decreased to 1.18 mg/g, while the electrolyte leakage conductivity increased to 76.19 ws/cm. The net photosynthetic rate, the stomatal conductance and transpiration rate decreased, whereas the concentration of intercellular CO₂ increased. Moreover, compared with the control, the light saturation point, the maximum net photosynthetic rate, the dark respiration rate and the CO₂ saturation point decreased, while the light compensation point and the CO₂ compensation point increased. The content of nitrogen, phosphorus, potassium and some nutrient elements including Zn, Mn, Fe decreased to 2.41, 5.71, 36.07, 33.53, 112.37 and 1318.03 g/kg, respectively, while the content of Cu, Ca, Mg increased to 8.07, 538.13 and 33.13 g/kg, respectively. The results could provide a theoretical basis for elucidating the pathological mechanism of A. sinensis disease caused by D. destructor.

Key words: Angelica sinensis, Ditylenchus destructor, Cellular Structure, Light and CO₂ Response, Physiological Characteristics, Nutrient Element Content

CLC Number:

S432

Qi Yonghong, Zhang Xinrui, Cao Sufang, Li Minquan, Li Qingqing, Li Xueping, Jiang Jingjing, Li Jiping. Ditylenchus destructor: Effects on the Cell Structure and the Physiological Characteristics of Angelica sinensis[J]. Journal of Agriculture, 2021, 11(6): 36-41.

Figures/Tables 8

References 31

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处理	净光合速率/[μmol/(m²·s)]	气孔导度/[mol/(m²·s)]	胞间CO₂浓度/(μmol/mol)	蒸腾速率/[mmol/(m²·s)]
病叶	6.05±0.09 b	0.04±0.01 b	270.90±2.22 a	2.52±0.04 b
健叶	12.44±0.26 a	0.33±0.08 a	212.25±0.32 b	6.23±0.12 a

处理	净光合速率/[μmol/(m²·s)]	气孔导度/[mol/(m²·s)]	胞间CO₂浓度/(μmol/mol)	蒸腾速率/[mmol/(m²·s)]
病叶	6.05±0.09 b	0.04±0.01 b	270.90±2.22 a	2.52±0.04 b
健叶	12.44±0.26 a	0.33±0.08 a	212.25±0.32 b	6.23±0.12 a

处理	最大净光合效率	光饱和点	光补偿点	暗呼吸速率
病叶	17.24±0.09 a	786.22±0.57 b	53.11±0.37 a	-6.46±0.42 b
健叶	20.51±0.61 a	1091.69±1.13 a	31.45±0.57 b	-2.37±0.05 a

处理	最大净光合效率	光饱和点	光补偿点	暗呼吸速率
病叶	17.24±0.09 a	786.22±0.57 b	53.11±0.37 a	-6.46±0.42 b
健叶	20.51±0.61 a	1091.69±1.13 a	31.45±0.57 b	-2.37±0.05 a

处理	最大净光合效率	CO₂饱和点	CO₂补偿点	光呼吸速率
病叶	24.05±0.84 b	725.20±0.43 b	76.02±0.51 a	11.62±0.63 a
健叶	28.10±0.59 a	798.41±0.25 a	61.73±0.35 b	8.29±0.36 b