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Proceedings Paper

Rapid identification of photosynthetic responses to aluminum phytotoxicity using fluorescence techniques
Author(s): Zhe Li; Da Xing; Lingrui Zhang
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Paper Abstract

Oxidative stress has been demonstrated to be associated with Aluminum (Al) -induced photosynthetic damages. Here, the responses of photosynthetic activity to Al toxicity were investigated using chlorophyll fluorescence imaging and delayed fluorescence (DF). DF intensity and chlorophyll fluorescence parameters were decreased in tobacco leaves treated with Al, and this decline is generally accompanied with sharp oxidative burst. However, leaves pretreated with a natural antioxidant ascorbic acid (AsA) also showed obvious decrease of photosynthetic activity upon Al treatment, though the degree of decline was smaller than that of un-pretreated leaves, indicating the existence of photosynthetic damages independent of oxidative stress. Exogenous additions of Mg, Fe or Ca could alleviate this photosynthetic damage caused by Al treatment, implicating that Al might directly act on cellular ion homeostasis to affect photosynthetic metabolism. Together, our results indicated that photosynthetic damages induced by Al toxicity might be both dependent and independent of oxidative stress, and fluorescence techniques are useful in identification of photosynthetic responses to Al phytotoxicity.

Paper Details

Date Published:
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Proc. SPIE 7513, 2009 International Conference on Optical Instruments and Technology: Optoelectronic Imaging and Process Technology, ; doi: 10.1117/12.838088
Show Author Affiliations
Zhe Li, South China Normal Univ. (China)
Da Xing, South China Normal Univ. (China)
Lingrui Zhang, South China Normal Univ. (China)


Published in SPIE Proceedings Vol. 7513:
2009 International Conference on Optical Instruments and Technology: Optoelectronic Imaging and Process Technology

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