title: Physiological and biochemical response to drought stress in the leaves of Aegiceras corniculatum and Kandelia obovata.
abstract: Drought stress is one of the major abiotic stresses that affects plant growth and metabolism adversely around the world. According to this research, the effect of drought stress on the activity of antioxidative enzymes, soluble sugar, protein and lipid peroxidation were studied in leaves of two mangrove plants, Kandelia obovata and Aegiceras corniculatum. The result showed that superoxide dismutase (SOD) and peroxidase (POD) varied significantly between the leaves and roots studied. The activities increased in different stress levels. The production rate of O 2 (-·) changed with the activity of SOD and POD. Lipid peroxidation was enhanced and Glycine betaine (GB) could decrease the level of malonaldehyde in order to reduce the damage of membrane system. The content of soluble sugar and protein also increased under drought stress and GB helped to eliminate the accumulation of them which somehow enhance the ability of defensing the plants under drought stress. These results indicated that antioxidative activity may play an important role in A. corniculatum and K. obovata and that cell membrane in leaves of K. obovata had greater stability than those of A. corniculatum. Exogenous application of GB had positive effects on A. corniculatum and K. obovata under drought stress which could be products exogenously applied to mangrove plants in order to alleviates the adverse effects.
authors.affiliation: State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China.
authors.forename: Gui-Fang
authors.initials: GF
authors.lastname: Guan
authors.affiliation: State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China. yswang@scsio.ac.cn.|Daya Bay Marine Biology Research Station, Chinese Academy of Sciences, Shenzhen, 518121, China. yswang@scsio.ac.cn.
authors.forename: You-Shao
authors.initials: YS
authors.lastname: Wang
authors.affiliation: State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China.
authors.forename: Hao
authors.initials: H
authors.lastname: Cheng
authors.affiliation: State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China.
authors.forename: Zhao-Yu
authors.initials: ZY
authors.lastname: Jiang
authors.affiliation: State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China.
authors.forename: Jiao
authors.initials: J
authors.lastname: Fei
mesh_terms: D000975:Antioxidants / Q000378:metabolism*; D050260:Carbohydrate Metabolism; D055864:Droughts; D015227:Lipid Peroxidation; D009994:Osmolar Concentration; D010084:Oxidation-Reduction; D018515:Plant Leaves / Q000201:enzymology / Q000254:growth & development / Q000502:physiology; D010940:Plant Proteins / Q000378:metabolism; D029623:Primulaceae / Q000201:enzymology / Q000254:growth & development / Q000502:physiology*; D043982:Rhizophoraceae / Q000201:enzymology / Q000254:growth & development / Q000502:physiology*; D013312:Stress, Physiological
chemical_list: D000975:Antioxidants; D010940:Plant Proteins
keywords: Aegiceras corniculatum; Drought stress; Glycine betaine; Kandelia obovata; Mangrove plant; Peroxidase (POD); Superoxide dismutase (SOD)