LI Zhong, JIANG Ligeng, TANG Ronghua, XIONG Faqian, TANG Xiumei, JIANG Jing, HE Liangqiong, ZHONG Ruichun, HAN Zhuqiang. Identification and allelopathy of chemical compositions of peanut root exudates[J]. Journal of South China Agricultural University, 2015, 36(5): 48-53. DOI: 10.7671/j.issn.1001-411X.2015.05.009
    Citation: LI Zhong, JIANG Ligeng, TANG Ronghua, XIONG Faqian, TANG Xiumei, JIANG Jing, HE Liangqiong, ZHONG Ruichun, HAN Zhuqiang. Identification and allelopathy of chemical compositions of peanut root exudates[J]. Journal of South China Agricultural University, 2015, 36(5): 48-53. DOI: 10.7671/j.issn.1001-411X.2015.05.009

    Identification and allelopathy of chemical compositions of peanut root exudates

    More Information
    • Received Date: October 14, 2014
    • Available Online: May 17, 2023
    • Objective 

      To analyze peanut root exudates and study the allelopathic effects of peanut root exudates.

      Method 

      Compounds extracted from peanut root exudates were identified by GC-MS technique. The allelopathic effects of peanut root exudates on the peanut seeding growth were analyzed using biological test at the concentrations of 0, 1 × 10-5, 1 × 10-4 and 1 × 10-3 mol·L-1.

      Result and conclusion 

      The peanut root exudates included organic acid, alcohol, ester, ketone, aldehyde, benzene, hydrocarbon and so on. Benzaldehyde and 4-ethylbenzoic acid, which showed an allelopathic effect on peanut, were found to be the major components of peanut root exudates. 1 × 10-5mol·L-1 Benzaldehyde, 4-ethylbenzoic acid and ferulic acid promoted or weakly inhibited peanut seeding stem length, root length, dry mass of root and shoot. Compared with the control, 1 × 10-3 and 1 × 10-4 mol·L-1 benzaldehyde, 4-ethylbenzoic acid and ferulic acid significantly inhibited peanut seedling growth (P < 0.05). The SOD activity, POD activity and MDA content of two peanut varieties leaf showed a rising trend to varying degrees at different concentration levels of benzaldehyde, 4-ethylbenzoic acid and ferulic acid, and there was significant difference between the high concentration treatment (1 × 10-3 mol ·L-1) and the control (P < 0.05). In conclusion, there are allelophathic substances in peanut root exudates, which is one of the main factors of continuous cropping barrier of peanut.

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