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Effects of Allelochemicals on Root Growth and Pod Yield in Response to Continuous Cropping Obstacle of Peanut

文献类型： 外文期刊

作者： Tang, Zhaohui 1 ; Guo, Feng 1 ; Cui, Li 1 ; Li, Qingkai 4 ; Zhang, Jialei 1 ; Wang, Jianguo 1 ; Yang, Sha 1 ; Meng, Jingjing 1 ; Li, Xinguo 1 ; Liu, Ping 2 ; Wan, Shubo 1 ;

作者机构： 1.Shandong Acad Agr Sci, Inst Crop Germplasm Resources, Jinan 250100, Peoples R China

2.Shandong Key Lab Genet Improvement, Ecol & Physiol Crops, Jinan 250100, Peoples R China

3.Minist Agr & Rural Affairs, Sci Observat & Expt Stn Crop Cultivat East China, Dongying 257100, Peoples R China

4.Shandong Agr Engn Univ, Jinan 255300, Peoples R China

5.Shandong Acad Agr Sci, Inst Agr Resources & Environm, Jinan 250100, Peoples R China

关键词： Peanut; continuous cropping obstacle; root growth; pod yield

期刊名称：PHYTON-INTERNATIONAL JOURNAL OF EXPERIMENTAL BOTANY （ 影响因子：1.407； 五年影响因子：0.996 ）

ISSN： 0031-9457

年卷期： 2023 年 92 卷 1 期

页码：

收录情况： SCI

摘要： Continuous cropping (CC) obstacle is a major threat in legume crops production; however, the underlying mechanisms concerning the roles allelochemicals play in CC obstacle are poorly understood. The current 2-year study was conducted to investigate the effects of different kinds and concentrations of allelochemicals, p-hydroxybenzoic acid (H), cinnamic acid (C), phthalic acid (P), and their mixtures (M) on peanut root growth and productivity in response to CC obstacle. Treatment with H, C, P, and M significantly decreased the plant height, dry weight of the leaves and stems, number of branches, and length of the lateral stem compared with control. Exogenous application of H, C, P, and M inhibited the peanut root growth as indicated by the decreased root morphological characters. The allelochemicals also induced the cell membrane oxidation even though the antioxidant enzymes activities were significantly increased in peanut roots. Meanwhile, treatment with H, C, P, and M reduced the contents of total soluble sugar and total soluble protein. Analysis of ATPase activity, nitrate reductase activity, and root system activity revealed that the inhibition effects of allelochemicals on peanut roots might be due to the decrease in activities of ATPase and NR, and the inhibition of root system. Consequently, allelochemicals significantly decreased the pod yield of peanut compared with control. Our results demonstrate that allelochemicals play a dominant role in CC obstacle-induced peanut growth inhibition and yield reduction through damaging the root antioxidant system, unbalancing the osmolytes accumulation, and decreasing the activities of root-related enzymes.

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