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Effects of Salt Stress on epidermal cell Expansion in Leaves of Arabidopsis thaliana

Agricultural Science & Technology 2011年第3期12卷 340-342页

作者：侯蕾陈龙俊山东师范大学生命科学学院逆境植物重点实验室山东济南250014

[Objective] The aim of this study was to investigate the effects of salt stress on cell expansion in Arabidopsis thaliana rosette leaves.[Method] Arabidopsis seedlings were treated by sodium chloride at the concentration of 0,100 or 150 mmol/L. At the 7th and 14th d of treatment,with nail enamel printing mark method and computer software,the leaf blades area and abaxial epidermal pavement cells area was measured and compared using statistical analysis in Excel. [Result] The growth of Arabidopsis rosette leaves was inhibited under salt stress. Leaves treated for 7 or 14 d expanded less compared with controls. The salt-mediated decrease in leaf expansion is associated with a decrease in abaxial pavement cell expansion. [Conclusion] The decreased leaf and epidermal cell expansion under salt stress is the most important characteristic of plant physiological response to salt stress.

关键词： Arabidopsis thaliana Salt treatment Leaf blade area epidermal cell area Nail enamel printing mark method

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Reliable Analytic Strategy to Correlate the Morphological and Cytological Parameters on Lupinus termis L, against Fusarium oxysporum Infection

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Journal of Agricultural Science and Technology(A) 2015年第7期5卷 585-600页

作者： Ramadan Abd Elghany Mohamed Heba Hassan Elsalahy Osama Abdel-Hafeez Al-Bedak Hoda Abd-EI-Fatah Mostafa Ahmed Nemmat Abd Elgawad Hussein Botany and Microbiology Department Faculty of Science Assiut University Assiut 71516 Egypt Mycological Centre Faculty of Science Assiut University Assiut 71516 Egypt Plant Pathology Research Institute Agriculture Research Center (ARC) Giza 12619 Egypt Faculty of Life Sciences Department of Agronomy and Crop Science Humboldt University of Berlin Albrecht-Thaer-Weg 5Berlin 14195 Germany

Many analytic strategies have emerged to estimate plant responses to Fusarium wilt. The demand for fast and reliable method （diagnosis, prediction） to determine isolate strength accurately is not established yet. Early determination of pathogen strength helps in plant medication. The aim of this study was to develop a faster strategy and method for early determination of fungal isolates strength in correlation to plant response. Till now, the scientists have no consensus on the most correlated parameters that could express wilt precisely. In this study, 30 isolates of Fusarium oxysporum isolated from Lupinus termis L. were used to provide an explicit image about the real strength of Fusarium isolates and its impact on the plant. Wilting percentage ranged from 26.67% to 93.33% of the infected plants depending on isolate virulence. Some of cellular, morphological and physical measurements were conducted on 8 out of 30 isolates, including root （length, fresh weight （FW） and dry weight （DW））, nodules （water content （WC）, FW, DW）, stem （height, WC, FW, DW）, total leaves/plant （WC, FW, DW） and the fourth leaf （WC, FW, DW, leaf area, epidermal cell area, epidermal cell number, succulence）. Hierarchical clustering was used to determine the variance between the isolates. Detrended correspondence analysis （DCA） and canonical correspondence analysis （CCA） were used to determine the most important growth parameters that could express wilting accurately. The CCA results showed that most of the measured parameters on the fourth leaf, except for leaf epidermal cell number, were highly and positively correlated to wilt. That makes these specific parameters valuable and sensitive for any changes in isolates strength. Accordingly, a mathematical model was created to be helpful in the quick determination of isolate strength and precise medication.

关键词： F. oxysporum L. termis L. leaf area epidermal cell area water content linear and exponential decay models.

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