Using ultra-weak luminescence to evaluate NaCl stress resistance of maize varieties

Guirong Chi

doi:10.1117/12.843402

28 October 2009 Using ultra-weak luminescence to evaluate NaCl stress resistance of maize varieties

Guirong Chi

Proceedings Volume 7519, Eighth International Conference on Photonics and Imaging in Biology and Medicine (PIBM 2009); 75191V (2009) https://doi.org/10.1117/12.843402
Event: Photonics and Optoelectronics Meetings 2009, 2009, Wuhan, China

Abstract

In this paper, the delayed ultra-weak luminescence (UWL), Nitrate reductase (NR) activity, and reactive oxygen species (ROS) contents of maize varieties (Zhengdan958 and Jundan20) under 100 and 200 mmol NaCl stress were analyzed. The results showed that the UWL intensity was decreased and the curve attenuating accelerated under the NaCl stress. With the NaCl concentration increasing, the total photon number reduced more notably, compared with Jundan20, the decreasing of total photon number and the tendency of curve attenuating was more obviously. The activity of Nitrate reductase, which is a key marker reflecting internal physiology status, decrease 18% in Zhengdan958 and 15.4% in Jundan20 under 100 mmol NaCl, while it decreased 28.8% and 31.07 under 200 mmol NaCl, respectively. Contrarily, the ROS contents increased remarkably, ranging from 146% to 116% under different NaCl stress in Zhengdan958 and Jundan20, respectively, the corresponding value at 200 mmol NaCl were increased from 525% to 543%, respectively. Summarized, the NaCl resistance of Jundan20 was superior to Zhengdan958. From these results, it was suggested that UWL decreasing tendency was consisting with the change character of Nitrate reductase activity, and rather the in vivo metabolism reactions than the ROS contents, was the main resources of ultraweak photon emitting. In conclusion, the UWL and the physiological status are closely related, ultra-weak luminescence could be used as a time-saving, sensitive method for evaluating NaCl stress resistance of different maize varieties.

Citation Download Citation

Guirong Chi "Using ultra-weak luminescence to evaluate NaCl stress resistance of maize varieties", Proc. SPIE 7519, Eighth International Conference on Photonics and Imaging in Biology and Medicine (PIBM 2009), 75191V (28 October 2009); https://doi.org/10.1117/12.843402

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KEYWORDS

Luminescence

Resistance

Signal attenuation

Oxygen

Mode conditioning cables

Physiology

Metals

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