| 摘要 | 第6-8页 |
| abstract | 第8-9页 |
| CHAPTER1:GENERAL INTRODUCTION | 第19-23页 |
| 1.1 INTRODUCTION | 第19-21页 |
| 1.2 HYPOTHESIS | 第21页 |
| 1.3 AIM OF THE STUDY | 第21页 |
| 1.4 SPECIFIC OBJECTIVES | 第21页 |
| 1.5 SCOPE AND OUTLINE OF THE THESIS | 第21-23页 |
| CHAPTER2:LITERATURE REVIEW | 第23-38页 |
| 2.1 COWPEA:ORIGIN,DOMESTICATION AND DISTRIBUTION | 第23-24页 |
| 2.2 DESCRIPTION,CLASSIFICATION AND IMPORTANCE | 第24页 |
| 2.3 ENVIRONMENTAL REQUIREMENTS AND COWPEA PRODUCTION | 第24-25页 |
| 2.4 BIOLOGICAL NITROGEN FIXATION IN LEGUMES SYSTEM | 第25-27页 |
| 2.4.1 Populations of rhizobia | 第25-26页 |
| 2.4.2 Inoculation of cowpea with rhizobium strains | 第26-27页 |
| 2.5 BIOTIC AND ABIOTIC CONSTRAINTS FOR COWPEA PRODUCTION | 第27-30页 |
| 2.5.1 Biotic stress | 第27页 |
| 2.5.2 Abiotic stress constraints | 第27-30页 |
| 2.6 ADAPTATION TO DROUGHT STRESS IN COWPEA | 第30-31页 |
| 2.6.1 Drought escape in cowpea | 第30页 |
| 2.6.2 Drought avoidance and tolerance in cowpea | 第30-31页 |
| 2.7 BREEDING FOR DROUGHT TOLERANCE IN COWPEA | 第31页 |
| 2.8 MORPHOLOGICAL,PHYSIOLOGICAL AND BIOCHEMICAL INDICATORS FOR DROUGHT TOLERANCE IN COWPEA | 第31-32页 |
| 2.9 WATER USE EFFICIENCY(WUE) | 第32-33页 |
| 2.10 CARBON AND OXYGEN ISOTOPIC COMPOSITION | 第33页 |
| 2.11 ROLES OF HORMONES REGULATING PHYSIOLOGICAL RESPONSES TO DROUGHT STRESS | 第33-35页 |
| 2.11.1 Abscisic Acid(ABA) | 第33-34页 |
| 2.11.2 Auxins | 第34页 |
| 2.11.3 Cytokinins | 第34-35页 |
| 2.11.4 Gibberellins | 第35页 |
| 2.12 DROUGHT STRESS MEMORY | 第35-36页 |
| 2.13 DROUGHT PRIMING | 第36-38页 |
| CHAPTER3:LEAF GAS EXCHANGE,PLANT WATER RELATIONS AND WATERUSE EFFICIENCY OF VIGNA UNGUICULATA L.WALP.INOCULATED WITH RHIZOBIA UNDER DIFFERENT SOIL WATER REGIMES | 第38-51页 |
| 3.1 INTRODUCTION | 第38-39页 |
| 3.2 MATERIALS AND METHODS | 第39-41页 |
| 3.2.1 The Growing Conditions and Treatments | 第39-40页 |
| 3.2.2 Sampling,Measurements and Analysis | 第40页 |
| 3.2.3 Statistical Analysis | 第40-41页 |
| 3.3 RESULTS | 第41-47页 |
| 3.3.1 Soil Water Changes | 第41页 |
| 3.3.2 Leaf Gas Exchange | 第41-42页 |
| 3.3.3 Leaf Area and Root Nodule Number | 第42-43页 |
| 3.3.4 Plant Water Status and ABA Concentration | 第43-45页 |
| 3.3.5 Biomass accumulation,plant water use,water use efficiency,plantδ~(13)C andδ~(18)O | 第45-47页 |
| 3.4 DISCUSSION | 第47-50页 |
| 3.5 CONCLUSION | 第50-51页 |
| CHAPTER4:DROUGHT PRIMING AT EARLY GROWTH STAGE IMPROVED PLANT WATER STATUS,WUE AND PHOTOSYNTHESIS CAPACITY DURING THE SUBSEQUENT DROUGHT STRESS IN COWPEA PLANTS#33 | 第51-73页 |
| 4.1 INTRODUCTION | 第51-53页 |
| 4.2 MATERIALS AND METHODS | 第53-56页 |
| 4.2.1 The growing conditions and treatments | 第53-54页 |
| 4.2.2 Sampling,measurements and analysis | 第54-55页 |
| 4.2.3 Statistical analysis | 第55-56页 |
| 4.3 RESULTS | 第56-69页 |
| 4.3.1 Soil water dynamics | 第56-57页 |
| 4.3.2 Leaf gas exchange,intrinsic water use efficiency and chlorophyll content | 第57-58页 |
| 4.3.3 Plant growth | 第58-59页 |
| 4.3.4 Plant water status | 第59-60页 |
| 4.3.5 Plant hormones(ABA,IAA,ZR and GA3) | 第60-62页 |
| 4.3.6 Biomass production,plant water use,water use efficiency and plantδ13C | 第62-65页 |
| 4.3.7 Plant N,15N and C accumulation | 第65-69页 |
| 4.4 DISCUSSIONS | 第69-72页 |
| 4.5 CONCLUSION | 第72-73页 |
| CHAPTER5:GENERAL CONCLUSION AND RECOMMENDATIONS | 第73-76页 |
| 5.1 CONCLUSION | 第73-74页 |
| 5.2 RECOMMENDATIONS | 第74-76页 |
| REFERENCES | 第76-96页 |
| ACKNOWLEGEMENTS | 第96-97页 |
| AUTHOR?S RESUME | 第97页 |
