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Article

Allelopathic Effect of Serphidium kaschgaricum (Krasch.) Poljak. Volatiles on Selected Species

by 1,2,3,†, 1,4,†, 1, 5, 1,3, 1, 2,* and 1,2,3,*
1
State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China
2
Shandong Provincial Key Laboratory of Water and Soil Conservation and Environmental Protection, College of Resources and Environment, Linyi University, Linyi 276000, China
3
University of Chinese Academy of Sciences, Beijing 100049, China
4
Research Center for Ecology and Environment of Central Asia, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China
5
Chemistry and Environment Science School, Yili Normal University, Yining 835000, China
*
Authors to whom correspondence should be addressed.
Authors equally contributed to the study.
Academic Editors: Bousquet-Mélou Anne, James M Mwendwa and Sajid Latif
Plants 2021, 10(3), 495; https://doi.org/10.3390/plants10030495
Received: 19 January 2021 / Revised: 25 February 2021 / Accepted: 1 March 2021 / Published: 5 March 2021
(This article belongs to the Special Issue Plant–Plant Allelopathic Interactions)
The chemical profile and allelopathic effect of the volatile organic compounds (VOCs) produced by a dominant shrub Serphidium kaschgaricum (Krasch.) Poljak. growing in northwestern China was investigated for the first time. Serphidium kaschgaricu was found to release volatile compounds into the surroundings to affect other plants’ growth, with its VOCs suppressing root elongation of Amaranthus retroflexus L. and Poa annua L. by 65.47% and 60.37% at 10 g/1.5 L treatment, respectively. Meanwhile, volatile oils produced by stems, leaves, flowers and flowering shoots exhibited phytotoxic activity against A. retroflexus and P. annua. At 0.5 mg/mL, stem, leaf and flower oils significantly reduced seedling growth of the receiver plants, and 1.5 mg/mL oils nearly completely prohibited seed germination of both species. GC/MS analysis revealed that among the total 37 identified compounds in the oils, 19 of them were common, with eucalyptol (43.00%, 36.66%, 19.52%, and 38.68% in stem, leaf, flower and flowering shoot oils, respectively) and camphor (21.55%, 24.91%, 21.64%, and 23.35%, respectively) consistently being the dominant constituents in all oils. Eucalyptol, camphor and their mixture exhibited much weaker phytotoxicity compared with the volatile oils, implying that less abundant compounds in the volatile oil might contribute significantly to the oils’ activity. Our results suggested that S. kaschgaricum was capable of synthesizing and releasing allelopathic volatile compounds into the surroundings to affect neighboring plants’ growth, which might improve its competitiveness thus facilitate the establishment of dominance. View Full-Text
Keywords: allelopathy; phytotoxicity; volatile oil; VOCs; Seriphidium kaschgaricum allelopathy; phytotoxicity; volatile oil; VOCs; Seriphidium kaschgaricum
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MDPI and ACS Style

Zhou, S.; Zokir, T.; Mei, Y.; Lei, L.; Shi, K.; Zou, T.; Zhang, C.; Shao, H. Allelopathic Effect of Serphidium kaschgaricum (Krasch.) Poljak. Volatiles on Selected Species. Plants 2021, 10, 495. https://doi.org/10.3390/plants10030495

AMA Style

Zhou S, Zokir T, Mei Y, Lei L, Shi K, Zou T, Zhang C, Shao H. Allelopathic Effect of Serphidium kaschgaricum (Krasch.) Poljak. Volatiles on Selected Species. Plants. 2021; 10(3):495. https://doi.org/10.3390/plants10030495

Chicago/Turabian Style

Zhou, Shixing, Toshmatov Zokir, Yu Mei, Lijing Lei, Kai Shi, Ting Zou, Chi Zhang, and Hua Shao. 2021. "Allelopathic Effect of Serphidium kaschgaricum (Krasch.) Poljak. Volatiles on Selected Species" Plants 10, no. 3: 495. https://doi.org/10.3390/plants10030495

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