| Abstract: | Physiological indices, including photosynthesis, chlorophyll fluorescence, adenylate energy charge (AEC) ratio, and leaf reflectance, were determined for Typha domingensis and Spartina alterniflora in response to increasing concentrations of Cd and compared with the growth responses of these species. Leaf expansion, the live/total ratio of plant aboveground biomass, and the aboveground regrowth rate after the initial harvests were significantly reduced with increasing Cd concentration in the growth medium. Of the four physiological responses measured, only photosynthesis and AEC responded to the Cd treatment before damage was visually apparent. Also, these indices were significantly correlated with leaf expansion rate and live/total ratio in most instances. Except at the end of the experiment, when the most stressed plants began to die, the Fv/Fm ratio was not significantly affected by the Cd treatment. The leaf spectral reflectance parameters showed no significant change during the entire treatment period. The significant correlation between the stress indicators and plant growth supported the findings that photosynthesis and AEC were the most responsive of the indicators tested, however, further research investigating other chlorophyll fluorescence and leaf reflectance parameters may demonstrate as well the value of these indicators in quantifying sublethal stress. ?? 2001 Elsevier Science B.V. All rights reserved. |
| Genre: | Article |
| ProdID: | 70022982 |
| Citation Author: | Mendelssohn, I. A.; McKee, K. L.; Kong, T. |
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| Citation End Page: | 275 |
| Citation Issue: | 3 |
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| Citation Language: | English |
| Citation Larger Work Title: | Environmental and Experimental Botany |
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| Citation Number Of Pages: | 13 |
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| Citation Search Results Text: | A comparison of physiological indicators of sublethal cadmium stress in wetland plants; 2001; Article; Journal; Environmental and Experimental Botany; Mendelssohn, I. A.; McKee, K. L.; Kong, T. |
| Citation Start Page: | 263 |
| Citation Volume: | 46 |
| Citation Year: | 2001 |
| Type: | citation/reference |
| Text: | A comparison of physiological indicators of sublethal cadmium stress in wetland plants; 2001; Article; Journal; Environmental and Experimental Botany; Mendelssohn, I. A.; McKee, K. L.; Kong, T. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| URL (DIGITAL OBJECT IDENTIFIER): | http://dx.doi.org/10.1016/S0098-8472(01)00106-X |
| Date Other: | Mon, 1 Jan 2001 00:00 -0600 |
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