在濕潤、干旱、和半干旱地區(qū),鹽脅迫是限制農(nóng)業(yè)發(fā)展的主要影響因素之一。每年都有大約40000公頃的耕地受到鹽漬化問題的影響而不能用于農(nóng)業(yè)生產(chǎn)。因此,人們的食品需求將面臨著挑戰(zhàn)。用鹽水進行灌溉來克服鹽脅迫的問題,同時獲得高產(chǎn)則是目前研究的熱點話題。針對這個問題,在本研究中,通過測定兩種秋葵品種（綠秋葵和紅秋葵）在萌發(fā)及幼苗生長階段對鹽脅迫的響應(yīng),分析早期生長階段兩種植物的耐鹽性。將兩個品種的種子置于培養(yǎng)皿中進行萌發(fā),之后將幼苗移至花盆中培養(yǎng)七天,并添加同等比例的氯化鈉和氯化鈣使鹽脅迫水平控制在（0）、0.6%、1.2%、1.8%。結(jié)果表明,低濃度的鹽脅迫（0.6%）對紅秋葵種子的發(fā)芽率沒有影響,但綠秋葵的發(fā)芽率在0.6%水平上有所下降。其它水平下兩個品種的種子萌發(fā)均受到影響,且在1.8%的鹽脅迫水平下,兩個品種的種子萌發(fā)率下降了 65%。隨著鹽脅迫水平的增加,幼苗的根長、莖長、總長度、鮮重、干重逐漸降低。綠秋葵的生長指標(biāo)比紅秋葵下降幅度更大。綜上所述,在早期生長階段,綠秋葵的萌發(fā)對鹽脅迫比較敏感,紅秋葵則比較耐鹽。通過在霍格蘭營養(yǎng)液中添加同等比例的氯化鈉和氯化鈣模擬鹽脅迫水平,對兩種秋葵（... 

【文章來源】：江蘇大學(xué)江蘇省

【文章頁數(shù)】：177 頁

【學(xué)位級別】：博士

【文章目錄】：
ACKNOWLEDGEMENTS
ABSTRACT
摘要
ABBREVIATIONS
GENERAL INTRODUCTION AND PROJECT AIMS
    1. Introduction
        1.1 Water
        1.2 Salinity, Agriculture and saline water
        1.3 Types of salt stress and effect on plant physiology
        1.4 Problem statement and different techniques to used saline water
        1.5 Okra
        1.6 Project Aims
        1.7 Outline of the Dissertation
LITERATURE REVIEW
    2. Literature review
        2.1 Photosynthetic characteristics
        2.2 Salts concentration Effect on growth properties
        2.3 Leaf water potential and carbonic anhydrase activity
        2.4 Effect of salt stress on plants Electrophysiological features
        2.5 Dilution effect on the restoration of plants physiology
GERMINATION AND SEEDLING GROWTH
    3. Effect of Sodium Chloride and Calcium Chloride on seed germination and early seedling growth of two okra cultivars
        3.1 Introduction
        3.2 Material and method
        3.3 Result and discussion
            3.3.1 Effect on germination
            3.3.2 Effect on root length, shoot length and root/shoot ratio
            3.3.3 Total length
            3.3.4 Effect on biomass
        3.4 Conclusion
PHOTOSYNTHETIC RESPONSE
    4. Photosynthetic Response of two Okra Cultivars under Salt stress and Re-watering
        4.1 Introduction
        4.2 Material and method
            4.2.1 Plant material and culture condition
            4.2.2 Physiological parameters
            4.2.3 Water potential
            4.2.4 Growth parameters 494.2.5 Carbonic anhydrase activity
R）">            4.2.6 Calculation of re-watering water use efficiency（WUE_R）
            4.2.7 Statistical analysis
        4.3 Results
            4.3.1 Net photosynthetic Rate
            4.3.2 Stomatal conductance
            4.3.3 Transpiration
2 concentration and WUE">            4.3.4 Intercellular CO₂ concentration and WUE
            4.3.5 Water potential and water content
            4.3.6 Growth parameters
            4.3.7 Carbonic anhydrase
            4.3.8 Correlation between different parameters of the two cultivars
            4.3.9 Re-watering water use efficiency
        4.4 Discussion
            4.4.1 Photosynthetic rate and plant growth under salt stress
            4.4.2 Re-watering effect on plant growth
R）">            4.4.3 Re-watering water use efficiency（WUE_R）
        4.5 Conclusion
WATER STATUES AND GROWTH RESPONSE
    5. Okra response to salt stress and re-watering application based on electrophysiological characteristics and growth parameter
        5.1 Introduction
        5.2 Material and methods
            5.2.1 Plant material and culture condition
            5.2.2 Growth parameter measurement
            5.2.3 Water potential
            5.2.4 Physiological capacitance
            5.2.5 Calculation of leaf tensity
            5.2.6 Statistical analysis
        5.3 Results
            5.3.1 Water potential
            5.3.2 Physiological capacitance
            5.3.3 Leaf tensity
            5.3.4 Plant growth
            5.3.5 Fruit growth
            5.3.6 Correlation between water status and growth parameters of both cultivars
        5.4 Discussion
        5.5 Conclusions
DILUTION STRATEGY
    6. Determination of dilution regime through electrophysiological characteristic and growth response for two okra cultivars
        6.1 Introduction
        6.2 Material and method
            6.2.1 Optimized value
            6.2.2 Dilute and direct irrigation point
            6.2.3 Principle of model construction
            6.2.4 Prediction of re-watering levels
        6.3 Results
            6.3.1 Optimized value
            6.3.2 Model construction
            6.3.3 Direct and dilute irrigation point of both cultivars
            6.3.4 Method for predicting re-watering levels
        6.4 Discussion
        6.5 Conclusion
GENERAL CONCLUSION
    7. Summary and Future perspective
        7.1 Summary
        7.2 Relation between our research work and Agricultural Engineering
        7.3 Future perspective
        7.4 Innovation
Reference
Publication
Patent
Appendix: plant response under different growth stage


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期刊論文
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