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Article

Microcosm Study on Allelopathic Effects of Leaf Litter Leachates and Purified Condensed Tannins from Kandelia obovata on Germination and Growth of Aegiceras corniculatum

by 1,2,3,†, 1,4,†, 1,3, 1,3, 1,3,5, 1, 1,3, 1,3,5 and 1,3,*
1
College of Life Sciences and Oceanography, Shenzhen University, Shenzhen 518071, China
2
College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518067, China
3
Greater Bay Area Coastal Mangrove Wetland Research & Development Centre, Guangdong Neilingding Futian National Nature Reserve, Shenzhen 518040, China
4
School of Landscape and Ecology, Shenzhen Institute of Technology, Shenzhen 518116, China
5
Department of Science, School of Science and Technology, The Open University of Hong Kong, Ho Man Tin, Kowloon, Hong Kong 999077, China
*
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Academic Editors: Victor H. Rivera-Monroy, Xosé Lois Otero-Pérez, Jorge Lopez-Portillo and Tiago Osorio Ferreira
Forests 2021, 12(8), 1000; https://doi.org/10.3390/f12081000
Received: 14 June 2021 / Revised: 19 July 2021 / Accepted: 26 July 2021 / Published: 28 July 2021
(This article belongs to the Special Issue Mangrove Wetland Restoration and Rehabilitation)
Kandelia obovata (Ko) and Aegiceras corniculatum (Ac) are common and dominant plant species in mangrove wetlands in South China, which are distributed in similar tidal zones along the coastline. The present study aimed to determine the allelopathic effects of leaf litter leachates (LLLs) from Ko and their purified condensed tannins (PCTs) on the germination and growth of Ac by mangrove microcosms. Replicate pots containing five different levels of LLLs and PCTs were separately prepared and propagules of Ac were placed in each treatment. Both LLLs and PCTs significantly inhibited the germination and growth of Ac, especially at high concentrations. The final germination rates of the roots and stems and the numbers of fine roots declined continuously, while other growth indicators, including the lengths of fine roots and nutritive roots and the biomasses of roots, stems, and leaves first increased and then decreased with increasing levels. These results indicate that LLLs from the leaf litter of Ko, in particular their PCTs, exerted an inhibition effect on propagule germination and seedling growth of Ac, and the inhibitory effects were concentration dependent. This study suggested that condensed tannins from leaf litter, acting as allelochemicals, could regulate the natural regeneration of a mangrove forest. View Full-Text
Keywords: allelopathy; leaf litter; condensed tannins; mangrove forests; natural regeneration allelopathy; leaf litter; condensed tannins; mangrove forests; natural regeneration
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MDPI and ACS Style

Lang, T.; Wei, P.; Chen, X.; Fu, Y.; Tam, N.F.-y.; Hu, Z.; Chen, Z.; Li, F.; Zhou, H. Microcosm Study on Allelopathic Effects of Leaf Litter Leachates and Purified Condensed Tannins from Kandelia obovata on Germination and Growth of Aegiceras corniculatum. Forests 2021, 12, 1000. https://doi.org/10.3390/f12081000

AMA Style

Lang T, Wei P, Chen X, Fu Y, Tam NF-y, Hu Z, Chen Z, Li F, Zhou H. Microcosm Study on Allelopathic Effects of Leaf Litter Leachates and Purified Condensed Tannins from Kandelia obovata on Germination and Growth of Aegiceras corniculatum. Forests. 2021; 12(8):1000. https://doi.org/10.3390/f12081000

Chicago/Turabian Style

Lang, Tao, Pingping Wei, Xiaoxia Chen, Yijian Fu, Nora F.-y. Tam, Zhangli Hu, Zhiteng Chen, Fenglan Li, and Haichao Zhou. 2021. "Microcosm Study on Allelopathic Effects of Leaf Litter Leachates and Purified Condensed Tannins from Kandelia obovata on Germination and Growth of Aegiceras corniculatum" Forests 12, no. 8: 1000. https://doi.org/10.3390/f12081000

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