Chlorophyll Fluorescence Measures of Emerged Hippuris vulgaris

Abstract:

We used PAM fluorometry to examine photosynthetic rates of emerged Hippuris vulgaris in two lakes characterized by different water temperature conditions. The photosynthetic response of emerged Hippuris vulgaris was measured every 2 h throughout daily light cycle from dawn (7 am) to dusk (17 pm). Diurnal changes in the pattern of rapid-light curves (RLCs) were investigated in the field under ambient daylight. Electron transport rates were always significantly higher for emerged Hippuris vulgaris in Five Colored Lake than that for plants in Arrow Bamboo Lake. Moreover, emerged Hippuris vulgaris in Five Colored Lake had higher light saturation. Such a finding suggests higher photosynthetic activity in Five Colored Lake possibly in response to high water temperature. The relationship between the electron transport rates and temperature suggests that this species is strongly temperature -limited.

• Periodical: Advanced Materials Research (Volumes 1073-1076)
• Pages: 1108-1111
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1073-1076.1108
• Online since: December 2014
• Authors: Lin An Gao
• Keywords: Emerged, Environmental, Photosynthetic, Rapid Light Curves

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