Time filter

Source Type

Huzhou, China

Wang S.-L.,Nanjing Forestry University | Wang P.,Nanjing Forestry University | Wang C.-Y.,Huzhou Normal College
Journal of Ecology and Rural Environment | Year: 2010

Masson pine seedlings were used as subject in a sand culture experiment to study effect of aluminum (Al) stress on rhizosphere pH, organic acid exudation and Al accumulation of masson pine seedlings. Results show that during the growth of masson pine seedlings, rhizosphere pH increased simultaneously with Al concentration rising from 0 to 300 u,mol • L"1, but leveled off when Al concentration exceeded 300 p.mol · L-1. Among the five organic acids ( citric, oxalic, succinic, malic and acetic acids) examined in this experiment, only oxalic and malic acids demonstrated a similar trend, and a positive correlation to rhizosphere pH. The exudation of oxalic and malic acids plays an important role in variation of rhizosphere pH. Besides, once entering masson pine seedlings through their root system, active Al ions accumulated unevenly in the plant as a result of nutrition and transport mechanism and were significantly higher in roots than in stems and leaves. Al accumulation within the seedlings was positively correlated with rhizosphere pH, root exudation of oxalic and malic acids when Al concentration in the soil was under 300 μmol · L-1. Source

Wang S.,Nanjing Forestry University | Wang P.,Nanjing Forestry University | Wang C.,Huzhou Normal College | Dai J.,University of Sichuan
Chinese Journal of Applied and Environmental Biology | Year: 2010

The chemical behavior of aluminum in the acidic soil-root interface of Pinus massoniana Lamb seedlings was investigated by planting them in pots. The Al in soil was fractionated into five operationally defined forms [exchangeable (Alex), carbonate (Ale), oxide (Alox), organic (Alor), and insoluble (Alin) species]. The results showed: 1) coexisted base ions (Ca2+, Mg 2+, K+, Na+) were positively related to Al 3+ tolerance in soil-root interface, and their alleviation followed a decreasing order: Ca2+>Mg2+>K2+≈ Na2+ 2) the contents of total P and N had positive effects on the Al accumulated in the roots; and 3) the organic matter (OM) was positive to the Alor in P. massonian rhizosphere. Besides, soil pH (<5.0) was negatively related to the rhizospheric Alex. Alex concentration was always higher in the rhizosphere than in bulk soil. The accumulated amount of Al absorbed in the plant roots mainly depended on the Alex quantity of the rhizosphere soil. The Alex entered into the roots and gradually complexed with the small organic molecules in root cell wall, mainly accumulated in the roots as Alor species. Source

Liu C.,Huzhou Normal College | Xia C.,Henan University of Urban Construction | Xie Z.,Henan University of Urban Construction | Jiao Y.,Henan University of Urban Construction | She Q.,Henan University of Urban Construction
International Journal of Morphology | Year: 2013

The present paper deals with a histological study of the blood cells of Bufo Bufo gargarizans in different months: January, March, May, July and October. The methods used are by routine blood smear in Wright stain and observation in vivo. We found that in smears and in vivo two main types of cells of the red cells: mitotic as well as amitotic. While amitotic occurs all the year round, particularly in July, mitosis so far had been seen only in July. It is also found that there are plenty of neutrophils in the blood cells of Bufo Bufo gargarizans, furthermore, the nuclei of these cells are polymorphic, especially in January and March. Meanwhile, the concentration of red cells was lowest in May and highest in January; The concentration of white blood cells was highest in October and lowest in March; As to granulocytes, eosinophils in July and October had higher proportion, while neutrophils and basophils in July; in agranulocytes, mononuclear cells reached the highest value in March, lowest in January, lymphocytes and the maximum value appeared in May, the lowest value appeared in July. Morphological changes of thrombocytes were not obvious. Source

Li J.F.,Huzhou Normal College | Wang L.S.,Guangxi University | Bai H.Q.,Guangxi University | Yang B.,Guangxi University | Chen Z.G.,Guangxi University
Chemistry of Natural Compounds | Year: 2010

A series of novel luteolin derivatives was synthesized employing the Vilsmeier-Haak-Arnold reaction from the intermediate compound 3',4',7-trichloro-5-hydroxyflavone, which was obtained from luteolin. These derivatives may be used to improve the pharmacological activities of luteolin. © 2010 Springer Science+Business Media, Inc. Source

Liu C.B.,Huzhou Normal College
Zhongguo ying yong sheng li xue za zhi = Zhongguo yingyong shenglixue zazhi = Chinese journal of applied physiology | Year: 2013

To investigate the neuroprotective potential of lycopene on oxidative stress and neurobehavioral abnormalities in rotenone induced Parkinson' disease (PD). Forty adult C57BL/6 mice were randomly divided into four groups (n = 10): control, lycopene (10 mg/kg body weight, orally), rotenone (3 mg/kg bw, intraperitoneally) and rotenone plus lycopene, which were sacrificed for 5 weeks. The spectrophotometry was used to determine the activities of superoxide dismutase (SOD), glutathione peroxidase (GSH-Px), catalase (CAT) and the content of malondialdehyde (MDA) in substantia nigra and right striatum. At the same time, the number of tyrosine hydroxylase (TH), alpha-synuclein (alpha-SYN) and microtubule-associated protein 3 light chain (LC3-B) positive neurons were estimated by immunohistochemistry. We also examined neurobehavioral abnormalities by WT-200 water maze. Rotenone administration increased the MDA levels and significantly decreased the activities of SOD, GSH-Px and CAT. However, lycopene administration to the rotenone treated animals increased the activities of SOD, GSH-Px and CAT when compared to rotenone treated animals in substantia nigra and right striatum. The cognitive and motor deficits in rotenone administered animals, which were reversed on lycopene treatment. Along with this, the number of TH decreased, alpha-SYN increased and LC3-B positive neurons increased in rotenone administered animals, which were reversed on lycopene treatment. Collectively, these observations provide an evidence for beneficial effect of lycopene supplementation in rotenone-induced PD and suggest therapeutic potential in neurodegenerative diseases involving accentuated oxidative stress. Source

Discover hidden collaborations