全球氣候變化、干旱脅迫的增加以及植物在不同生長階段遭受多種非生物脅迫,都可能導(dǎo)致作物產(chǎn)量的下降。在豆科植物中,干旱脅迫不僅會(huì)影響它們的生長,還會(huì)影響它們與根瘤菌的共生。然而,土壤水分狀況對(duì)接種根瘤菌的豇豆的生理反應(yīng)和水分利用效率（WUE）的影響還不明確。干旱鍛煉對(duì)后期干旱脅迫的影響已經(jīng)在一些作物品種中得到了研究。但是,干旱鍛煉及對(duì)后期不同水分脅迫的響應(yīng)機(jī)理還需要在豇豆中進(jìn)一步研究。因此,了解豇豆耐旱機(jī)制對(duì)維持豇豆或維持糧食產(chǎn)量和生產(chǎn)力具有重要意義。本研究的目的是:（i）研究水分脅迫和根瘤菌接種對(duì)葉片氣體交換,植物水分關(guān)系,水分利用效率以及碳氧同位素組成(δ¹³C,δ¹⁸O)的影響,（ii）確定豇豆早期生長期干旱鍛煉的生理反應(yīng),干旱信號(hào)和生長后期對(duì)干旱脅迫響應(yīng)以及對(duì)WUE的影響機(jī)制。盆栽試驗(yàn)于2017年和2018年在中國農(nóng)業(yè)科學(xué)院（CAAS）的溫控玻璃溫室進(jìn)行。為了研究水分脅迫和根瘤菌接種對(duì)葉片氣體交換,植物水分關(guān)系,水分利用效率以及碳氧同位素組成(δ¹³C,δ¹⁸O)的影響,在三種不同土壤水分條件下... 

【文章來源】：中國農(nóng)業(yè)科學(xué)院北京市

【文章頁數(shù)】：97 頁

【學(xué)位級(jí)別】：博士

【文章目錄】：
摘要
abstract
CHAPTER1:GENERAL INTRODUCTION
    1.1 INTRODUCTION
    1.2 HYPOTHESIS
    1.3 AIM OF THE STUDY
    1.4 SPECIFIC OBJECTIVES
    1.5 SCOPE AND OUTLINE OF THE THESIS
CHAPTER2:LITERATURE REVIEW
    2.1 COWPEA:ORIGIN,DOMESTICATION AND DISTRIBUTION
    2.2 DESCRIPTION,CLASSIFICATION AND IMPORTANCE
    2.3 ENVIRONMENTAL REQUIREMENTS AND COWPEA PRODUCTION
    2.4 BIOLOGICAL NITROGEN FIXATION IN LEGUMES SYSTEM
        2.4.1 Populations of rhizobia
        2.4.2 Inoculation of cowpea with rhizobium strains
    2.5 BIOTIC AND ABIOTIC CONSTRAINTS FOR COWPEA PRODUCTION
        2.5.1 Biotic stress
        2.5.2 Abiotic stress constraints
    2.6 ADAPTATION TO DROUGHT STRESS IN COWPEA
        2.6.1 Drought escape in cowpea
        2.6.2 Drought avoidance and tolerance in cowpea
    2.7 BREEDING FOR DROUGHT TOLERANCE IN COWPEA
    2.8 MORPHOLOGICAL,PHYSIOLOGICAL AND BIOCHEMICAL INDICATORS FOR DROUGHT TOLERANCE IN COWPEA
    2.9 WATER USE EFFICIENCY(WUE)
    2.10 CARBON AND OXYGEN ISOTOPIC COMPOSITION
    2.11 ROLES OF HORMONES REGULATING PHYSIOLOGICAL RESPONSES TO DROUGHT STRESS
        2.11.1 Abscisic Acid(ABA)
        2.11.2 Auxins
        2.11.3 Cytokinins
        2.11.4 Gibberellins
    2.12 DROUGHT STRESS MEMORY
    2.13 DROUGHT PRIMING
CHAPTER3:LEAF GAS EXCHANGE,PLANT WATER RELATIONS AND WATERUSE EFFICIENCY OF VIGNA UNGUICULATA L.WALP.INOCULATED WITH RHIZOBIA UNDER DIFFERENT SOIL WATER REGIMES
    3.1 INTRODUCTION
    3.2 MATERIALS AND METHODS
        3.2.1 The Growing Conditions and Treatments
        3.2.2 Sampling,Measurements and Analysis
        3.2.3 Statistical Analysis
    3.3 RESULTS
        3.3.1 Soil Water Changes
        3.3.2 Leaf Gas Exchange
        3.3.3 Leaf Area and Root Nodule Number
        3.3.4 Plant Water Status and ABA Concentration
        3.3.5 Biomass accumulation,plant water use,water use efficiency,plantδ~(13)C andδ~(18)O
    3.4 DISCUSSION
    3.5 CONCLUSION
CHAPTER4:DROUGHT PRIMING AT EARLY GROWTH STAGE IMPROVED PLANT WATER STATUS,WUE AND PHOTOSYNTHESIS CAPACITY DURING THE SUBSEQUENT DROUGHT STRESS IN COWPEA PLANTS#33
    4.1 INTRODUCTION
    4.2 MATERIALS AND METHODS
        4.2.1 The growing conditions and treatments
        4.2.2 Sampling,measurements and analysis
        4.2.3 Statistical analysis
    4.3 RESULTS
        4.3.1 Soil water dynamics
        4.3.2 Leaf gas exchange,intrinsic water use efficiency and chlorophyll content
        4.3.3 Plant growth
        4.3.4 Plant water status
        4.3.5 Plant hormones(ABA,IAA,ZR and GA3)
        4.3.6 Biomass production,plant water use,water use efficiency and plantδ13C
        4.3.7 Plant N,15N and C accumulation
    4.4 DISCUSSIONS
    4.5 CONCLUSION
CHAPTER5:GENERAL CONCLUSION AND RECOMMENDATIONS
    5.1 CONCLUSION
    5.2 RECOMMENDATIONS
REFERENCES
ACKNOWLEGEMENTS
AUTHOR?S RESUME



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