X. -J. Fu

China Agricultural University, Peping, Beijing, China

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Publications (2)2.4 Total impact

  • [Show abstract] [Hide abstract]
    ABSTRACT: Strawberry (Fragaria ananassa Duch.) seedlings were pretreated with hexanoic acid 2-(diethylamino)ethyl ester (DA-6) in concentrations of 0, 10, 20 and 40 mg dm−3 and then subjected to chilling and rewarming. The effects of applied DA-6 on the generation of reactive oxygen species (O2 −, H2O2), lipid peroxidation, proline accumulation and photosynthesis were evaluated. Pretreatment with DA-6 alleviated the inhibition of superoxide dismutase (SOD), catalase (CAT) and ascorbate peroxidase (APX) activities caused by chilling stress thus reducing O2 − and H2O2 production and lipid peroxidation in pretreated plants. DA-6 pretreatment also accelerated accumulation of proline and reduce the decrease in proline content after rewarming. DA-6 pretreatment increases maximum quantum yield of photosystem 2 (Fv/Fm), actual photochemical efficiency of photosystem 2 (ΦPS2), photochemical quenching coefficient (qP) and net photosynthetic rate (PN) and decreases non-photochemical quenching coefficient (qNP) of the seedlings under chilling stress. DA-6 pretreatment also increased the recovery rate of photosynthesis after rewarming. Additional key wordsascorbate peroxidase–catalase–chlorophyll fluorescence– Fragaria ananassa –net photosynthetic rate–superoxide dismutase.
    Biologia Plantarum 01/2011; 55(4):793-796. · 1.69 Impact Factor
  • X.J. Fu, D.M. Hunter, W.P. Shi
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    ABSTRACT: Field and laboratory studies demonstrated that Paranosema (Nosema) locustae had significant effects on the morphological phase transformation of Locusta migratoria manilensis (Meyen 1835). In the field, spraying P. locustae on gregarious locusts caused a substantial population reduction by 16 days after treatment, with most of the surviving locusts being phase solitaria. However, the effects of P. locustae on locust phase transformation began before direct mortality had caused a substantial reduction in locust density: locust numbers were still high at day 10, but locusts had already transformed to phase transiens. Laboratory assays showed that while a low dose of P. locustae had no effect on phase transformation, at a higher dose of 1×10 spores/mL, locusts had F/C ratios that were significantly (P
    Biocontrol Science and Technology 01/2010; 20(7):683-693. · 0.71 Impact Factor