Effects of PQQ on protective system in cucumber cotyledons under low temperature stress |
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Authors: | Zhao Yongfang Liu Weiqun Zhu Yunji Wang Yonghua Wang Guanfang |
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Institution: | (1) College of Life Sciences, Wuhan University, 430072 Wuhan, China;(2) Henan Agriculture University, 450002 Zhengzhou, China |
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Abstract: | The authors have studied the effects of Pyrroioguinloine quinone (PQQ) on superoxide dismutase (SOD), Ascorbid acid(AsA) peroxidase
(AsAPOD), glutathion (GSH) and electrolytic leakage of cotyledon in cucumber seedling under low temperature stress, meanwhile,
8-hydroquinone (8-HQ) and AsA (activeoxiygen scavengers) have been made use of in comparison with PQQ. The results indicate
that the activities of SOD, AsAPOD and content of GSH can be increased by PQQ. The relative conductivity of cotyledon in cucumber
seedling is decreased for PQQ possesses the ability of cleaning up free redical of oxygen. We came to the conclusion that
PQQ can act as a kind of active oxygen scavenger and adjust the metabolism on free radical of oxygen to balance in plants
and enhance resistance finally in plants.
Supported by the National Natural Science Foundation of China
Zhao Yongfang: born in 1940, Professor |
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Keywords: | pyrroloquinloine quinone (PQQ) protect system low temperatural stress cucumber seedling active oxygen scavenger |
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