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Fig. 1 | BMC Plant Biology

Fig. 1

From: Elevated CO2 can modify the response to a water status gradient in a steppe grass: from cell organelles to photosynthetic capacity to plant growth

Fig. 1

Principal component analysis on plant functional traits of Agropyron cristatum under elevated CO2 with water status gradient. The first two principal components (PCs) were shown (a), and projections of the two PCs were sorted by the combined treatments (b). A sat, light-saturated maximum photosynthetic rate; C i, intercellular CO2 concentration; E, transpiration rate; g s, stomatal conductance; V c,max, maximum rate of carboxylation; J max, maximum rate of electron transport; TPU, rate of thiose phosphate utilization; F v '/F m ', photochemical efficiency of open reaction centers of photosystem (PS) II; F v/F m, maximal photochemistry efficiency; LAR, leaf area ratio; LARMR, leaf area and root mass ratio; LMR, leaf mass ratio; RGR, relative growth rate; RMR, root mass ratio; SLA, specific leaf area; SMR, stem mass ratio; SSL, specific stem length; TDW, total plant biomass weight; WUEi, intrinsic water use efficiency; WUEt, total biomass water use efficiency. NW−60, NW−30, NW−15, NW0, NW15, NW30, NW60 denote −60 %, −30 %, −15 %, 0 %, 15 %, 30 %, and 60 % of watering relative to mean precipitation in the local site over 30 years with normal/ambient CO2 concentration; while EW−60, EW−30, EW-15, EW0, EW15, EW30, EW60 are those with elevated CO2

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