caa a22 4500 605509239 CHVBK 20210128100640.0 cr unu---uuuuu 210128e20150901xx s 000 0 eng 10.1007/s10452-015-9528-1 doi (NATIONALLICENCE)springer-10.1007/s10452-015-9528-1 Recovery limitation of endangered Ottelia acuminata by allelopathic interaction with cyanobacteria [Elektronische Daten] [Runbing Xu, Feng Wu, Sabine Hilt, Cheng Wu, Xiaolong Wang, Xuexiu Chang] Recovery of rare aquatic plant species in eutrophic lakes often fails, and mutual allelopathic effects between cyanobacteria and submerged macrophytes are one potential reason. In this study, we investigated allelopathic interactions between cyanobacteria and Ottelia acuminata, an endangered submerged macrophyte species in China. We tested effects of Microcystis aeruginosa on germination and seedling growth of two varieties of O. acuminata (O. acuminata var. crispa, OAC; and O. acuminata var. songmingensis, OAS) and vice versa effects of culture water of young seedlings and mature macrophytes on the growth of M. aeruginosa. We found that: (1) The culture water of mature O. acuminata (both OAC and OAS) allelopathically promoted M. aeruginosa growth, while seedlings had no effect. (2) M. aeruginosa exudates and extracts significantly promoted or inhibited seed germination of O. acuminata; (3) both exudates and extracts significantly decreased the seedling vitality of OAC and OAS. (4) M. aeruginosa exudates and extracts inhibited seedlings growth of O. acuminata, especially growth of roots and the second true leaf. (5) Allelopathic effects of M. aeruginosa exudates were stronger than those of extracts, and OAC showed stronger resistance to cyanobacteria than OAS. Our results indicate that cyanobacteria can allelopathically inhibit O. acuminata mainly by their exudates, while mature O. acuminata stimulate cyanobacteria growth. Such negative effects of cyanobacteria may contribute to the disappearance of O. acuminata and also slow down their recovery in eutrophic lakes. Springer Science+Business Media Dordrecht, 2015 Microcystis aeruginosa nationallicence Ottelia acuminata nationallicence Allelopathic effect nationallicence Endangered native species nationallicence Macrophytes restoration nationallicence Xu Runbing School of Ecology and Environmental Sciences, Yunnan University, 650091, Kunming, People's Republic of China aut Wu Feng School of Ecology and Environmental Sciences, Yunnan University, 650091, Kunming, People's Republic of China aut Hilt Sabine Leibniz-Institute of Freshwater Ecology and Inland Fisheries, 12587, Berlin, Germany aut Wu Cheng School of Ecology and Environmental Sciences, Yunnan University, 650091, Kunming, People's Republic of China aut Wang Xiaolong School of Ecology and Environmental Sciences, Yunnan University, 650091, Kunming, People's Republic of China aut Chang Xuexiu School of Ecology and Environmental Sciences, Yunnan University, 650091, Kunming, People's Republic of China aut Aquatic Ecology Springer Netherlands 49/3(2015-09-01), 333-342 1386-2588 49:3<333 2015 49 10452 https://doi.org/10.1007/s10452-015-9528-1 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10452-015-9528-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Xu Runbing School of Ecology and Environmental Sciences, Yunnan University, 650091, Kunming, People's Republic of China aut NATIONALLICENCE 700 1- Wu Feng School of Ecology and Environmental Sciences, Yunnan University, 650091, Kunming, People's Republic of China aut NATIONALLICENCE 700 1- Hilt Sabine Leibniz-Institute of Freshwater Ecology and Inland Fisheries, 12587, Berlin, Germany aut NATIONALLICENCE 700 1- Wu Cheng School of Ecology and Environmental Sciences, Yunnan University, 650091, Kunming, People's Republic of China aut NATIONALLICENCE 700 1- Wang Xiaolong School of Ecology and Environmental Sciences, Yunnan University, 650091, Kunming, People's Republic of China aut NATIONALLICENCE 700 1- Chang Xuexiu School of Ecology and Environmental Sciences, Yunnan University, 650091, Kunming, People's Republic of China aut NATIONALLICENCE 773 0- Aquatic Ecology Springer Netherlands 49/3(2015-09-01), 333-342 1386-2588 49:3<333 2015 49 10452