| Clonal integration and phenotypic plasticity are two of the emphases in the research ofclonal population biology of plants. In this paper, I conclude my study on the Leymus chinesismeadow of Songnen Plain. In the simple conservatory, I make the experiment on A. littoralisvar. sinensis population which is of creeping stem with three steps of light, connection anddisconnection of spacer, and then observe the indicators such as Height of ramets (HR), Meanlength of leaves (MLL), Number of tillers (NT), Root biomass/Shoot biomass (TB) and Rootbiomass/shoot biomass (RB/SB) as well. Further, I operate one-way analysis of variance andmean multiple comparison, analyze the phenotypic plasticity effects of A. littoralis var.sinensis on treatment of shading and investigate the influence of integration on plasticity. Andthen I compare the traits among connected and unconnected ramets under homogeneous andheterogeneous circumstances and discuss weather there are the effects of integration on thephenotypic plasticity of ramets pairs. The results are as follows:(1) Under the effects of shading, the target ramet which is shaded has changes ofphenotypic characteristics, especially in HR and TB whether it is connected or unconnected.Under the condition of slight light intensity, the phenotypic changes such as the increase ofMLL and HR are adaptable responses which are helpful for ramets to get more light.(2) Heavy shading can easily cause the phenotypic plasticity of the A. littoralis var.sinensis ramets pairs. On the contrary, the treatment of slight light intensity eliminate thedifferences between connected ramets because of the existence of integration effects. Thetarget ramet has more changes of phenotypic characters when the spacers are unconnectedthan it does while connected.(3) Under the conditions of heavy light intensity (natural light intensity or 60%), theindicator differences of two target ramets are not significant. But under the conditions of lowintensity of 40% natural light, the target ramet of connected ramets pairs has the advantage onthe aspects of HR, MLL, and TB. Under the conditions of two different light intensity of 40%(B) and 60% (B′), the differences of TB of two ramets B and B′ which are treated separatelyare significant (P<0.05). If treated with connected spacers, the biomass of B′ is bigger thanthat of the one without connected spacers at all time.(4) The three nutrition departments′ influences to MLL and HR are not significant. Butwith the increase of nutrition liquid, biomass and number of tillers increase.(5) Between the connected ramets, the treated ramet′s R/T (root top ratio) decreases withthe increase of nutrition liquid. And the R/T result is B>A, so the difference is significant(P<0.05). This is helpful for the ramet under bad environment to absorb more nutrition. Whilebetween unconnected ramets, the difference is not significant although B′>A′. The biomass ofstolon is more than CK and this helpful for Aeluropus littoralis var. sinensis to extend to theenvironment which is full of nutrition and other resources.So it can be concluded that transfer of nutrition or energy from treated ramet to targetramet i.e. clonal integration happens.
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