caa a22 4500 445891211 CHVBK 20180317145617.0 cr unu---uuuuu 170323e20110101xx s 000 0 eng 10.1007/s10750-010-0475-5 doi (NATIONALLICENCE)springer-10.1007/s10750-010-0475-5 Size-related auto-fragment production and carbohydrate storage in auto-fragment of Myriophyllum spicatum L. in response to sediment nutrient and plant density [Elektronische Daten] [Dong Xie, Dan Yu] Size-related asexual reproduction of submersed macrophytes is still poorly understood. Here, we investigate how size-related auto-fragmentation in Myriophyllum spicatum L. responds to sediment nutrients and plant density. An experiment was carried out with sediments containing two different nutrient levels and with two levels of plant density. The results show that sediment nutrients and plant density brought about a strong dependency of auto-fragment production and the amount of total non-structural carbohydrate (TNC) storage in auto-fragments on individual plant size (total plant biomass). However, these two factors acted differently on size dependency. Sediment nutrients positively affected auto-fragment production and the amount of TNC in auto-fragments of M. spicatum. High concentrations of sediment nutrients significantly increased these two traits in absolute value and the value relative to plant size. Although the auto-fragment biomass and the amount of TNC in auto-fragments did not differ between density treatments when plant size was considered, the absolute values of these two traits were much larger in the low plant density treatment than in the high plant density treatment, which suggested an indirect negative effect of plant density on the auto-fragmentation of M. spicatum. In addition, higher percentages of large auto-fragments (>100mg) were produced by plants that grew in nutrient poor sediment and low plant density environment than plants in nutrient rich sediment and high plant density environment. These results do not solely highlight a size-dependent effect, but also a size-independent effect of auto-fragment production and the amount of TNC in auto-fragments of M. spicatum. Furthermore, such size-independent effects can be explained by the significant biomass partitioning differences and the similar TNC-concentrations in auto-fragments under different environmental conditions. Springer Science+Business Media B.V., 2010 Auto-fragmentation nationallicence Carbohydrate storage nationallicence Myriophyllum spicatum L nationallicence Plant density nationallicence Plant size nationallicence Sediment nutrients nationallicence Xie Dong The National Field Station of Freshwater Ecosystem of Liangzi Lake, College of Life Science, Wuhan University, 430072, Wuhan, People's Republic of China aut Yu Dan The National Field Station of Freshwater Ecosystem of Liangzi Lake, College of Life Science, Wuhan University, 430072, Wuhan, People's Republic of China aut Hydrobiologia Springer Netherlands 658/1(2011-01-01), 221-231 0018-8158 658:1<221 2011 658 10750 https://doi.org/10.1007/s10750-010-0475-5 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10750-010-0475-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Xie Dong The National Field Station of Freshwater Ecosystem of Liangzi Lake, College of Life Science, Wuhan University, 430072, Wuhan, People's Republic of China aut NATIONALLICENCE 700 1- Yu Dan The National Field Station of Freshwater Ecosystem of Liangzi Lake, College of Life Science, Wuhan University, 430072, Wuhan, People's Republic of China aut NATIONALLICENCE 773 0- Hydrobiologia Springer Netherlands 658/1(2011-01-01), 221-231 0018-8158 658:1<221 2011 658 10750 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer