Changes of leaf antioxidant system, photosynthesis and ultrastructure in tea plant under the stress of fluorine
2011
Li, C., Huazhong Agricultural Univ., Wuhan (China). Coll. of Horticulture and Forestry Sciences | Zheng, Y., Huazhong Agricultural Univ., Wuhan (China). Coll. of Horticulture and Forestry Sciences | Zhou, J., Huazhong Agricultural Univ., Wuhan (China). Coll. of Horticulture and Forestry Sciences | Xu, J., Huazhong Agricultural Univ., Wuhan (China). Coll. of Horticulture and Forestry Sciences | Ni, D., Huazhong Agricultural Univ., Wuhan (China). Coll. of Horticulture and Forestry Sciences
Seedlings of Camellia sinensis were grown hydroponically for 30 d in order to study the effect of fluorine on growth parameters, antioxidant defence system, photosynthesis and leaf ultrastructure. Fresh and dry mass, chlorophyll content and net photosynthetic rate decreased with increasing F concentration. Superoxide dismutase activity decreased significantly, catalase and guaiacol peroxidase activities reached their maximun under 0.21 and 0.32 mM F, respectively. Proline, malondialdehyde and hydrogen peroxide contents increased significantly. These results suggested that antioxidant defence system of leaves did not sufficiently scavenge excessive reactive oxygen species. The cell ultrastructure was not changed under 0.11-0.21 mM F, however, it was destroyed at 0.32-0.53 mM F. So tea plants tolerated F in concentration less than 0.32 mM.
Show more [+] Less [-]AGROVOC Keywords
Bibliographic information
This bibliographic record has been provided by Library of Antonin Svehla