| The rose mallow, Hibiscus moscheutos, is a wetland plant found growing at the fringes of freshwater and brackish marshes. This study examines the effect of several factors on photosynthesis and biomass of this species. A field study was conducted which measured the photosynthetic rate of innundated and non-innundated plants on a weekly basis for ten weeks. There was no difference in photosynthesis rate between the two treatments; but differences were found in above ground biomass. The non-innundated plants had taller stems, and greater total leaf weight, but exhibited no difference in total weight of reproductive organs or number of empty leaf nodes.;A garden plot (controlled environment) study examined the effects on photosynthesis of water limited, nutrient limited, water and nutrient limited, and non-limited (control) treatments on container grown plants, Significant differences were observed in photosynthesis rates, the most pronounced difference occuring between the nutrient and water limited, and the control plants. |
