| 摘要 | 第1-7页 |
| ABSTRACT | 第7-9页 |
| Table of Content | 第9-12页 |
| LIST OF TABLES | 第12-13页 |
| LIST OF FIGURES | 第13-14页 |
| ABBREVIATION | 第14-15页 |
| CHAPTER 1 GENERAL INTRODUCTION | 第15-25页 |
| ·BACKGROUND OF RESEARCH | 第15-16页 |
| ·Current Issues of Arsenic Contamination in Soil | 第15-16页 |
| ·LITERATURE REVIEW | 第16-22页 |
| ·Arsenic in the Environment | 第16-17页 |
| ·Arsenic in Soil | 第17-18页 |
| ·Use of Arsenic in Ag riculture | 第18页 |
| ·Arsenic uptake by plants | 第18-19页 |
| ·Effects of Arsenic in Plants | 第19页 |
| ·Health effects of arsenic exposure | 第19-20页 |
| ·Current remediation tchnologies in As-contaminated soil | 第20-21页 |
| ·General information on vegetables | 第21-22页 |
| ·PROBLEM STATEMENT AND RESEARCH OBJECTIVES | 第22页 |
| ·Problem Statement | 第22页 |
| ·Research objectives | 第22页 |
| ·SCOPE AND LIMITATIONS OF RESEARCH | 第22-23页 |
| ·CONTRIBUTIONS AND SIGNIFICANCE OF THE PRESENT RESEARCH | 第23页 |
| ·RESEARCH CONTENTS AND TECHNICAL ROUTE | 第23-25页 |
| ·Research contents | 第23-24页 |
| ·The technical route of the research | 第24-25页 |
| CHAPTER 2 A PRELIMINARY HYDROPONIC SCREENING STUDY TOEVALUATE A SUITABLE LEVEL OF ARSENIC (Ⅴ) RESISTANCE IN LEAFYVEGETABLES | 第25-36页 |
| ABSTRACT | 第25-26页 |
| ·INTRODUCTION | 第26-27页 |
| ·MATERIALS AND METHODS | 第27-28页 |
| ·Plant mate rial and Preparation of seedlings | 第27页 |
| ·Hydroponic Screening | 第27页 |
| ·Detemination of arsenic and Evaluation of vegetable growth | 第27-28页 |
| ·Statistical analysis | 第28页 |
| ·RESULTS | 第28-33页 |
| ·Influence of As treatments on the growth of species | 第28-32页 |
| ·Translocation factor | 第32-33页 |
| ·DISCUSSION | 第33-35页 |
| ·CONCLUSION | 第35-36页 |
| CHAPTER 3 IDENTIFICATION OF VEGETABLE GENOTYPES WITHLOW-AS UPTAKE,TRANSLOCATION AND HIGH TOLERANCE UNDERHYDROPONICS | 第36-54页 |
| ABSTRACT | 第36-37页 |
| ·INTRODUCTION | 第37-38页 |
| ·MATERIALS AND METHODS | 第38-40页 |
| ·Plant materials and Preparation of seedlings | 第38页 |
| ·Hydroponic Screening | 第38-40页 |
| ·Chemical analysis of plant tissues | 第40页 |
| ·Statistical analysis | 第40页 |
| ·RESULTS | 第40-49页 |
| ·Genotypic variations in shoot As concentration and accumulation | 第40-41页 |
| ·Arsenic accumulation | 第41-43页 |
| ·Genetic variations in shoot biomass trait under As stress | 第43-47页 |
| ·Genetic variations in root-to-shoot transport and nutrient solution-to-plant | 第47-49页 |
| ·DISCUSSION | 第49-52页 |
| ·Genetic variations in As concentration among cultivars | 第49-50页 |
| ·Growth response of vegetable to As toxicity | 第50-51页 |
| ·The important factors affecting As uptake by cultivars | 第51页 |
| ·Identification of genotypes with low-As uptake | 第51-52页 |
| ·CONCLUSION | 第52-54页 |
| CHAPTER 4 UPTAKE KINETICS OF ARSENIC(V)BY TWO GENOTYPES OFLEAFY VEGETABLE UNDER HYDROPONIC | 第54-63页 |
| ABSTRACT | 第54-55页 |
| ·INTRODUCTION | 第55页 |
| ·MATERIALS AND METHODS | 第55-57页 |
| ·Plant materials | 第55页 |
| ·Methods | 第55-57页 |
| ·Plant growth | 第55-56页 |
| ·Kinetics of As(Ⅴ)uptake | 第56页 |
| ·Calculations of As Uptake Rates and Kinetic parameters | 第56-57页 |
| ·Statistical analysis | 第57页 |
| ·RESULTS | 第57-60页 |
| ·Depletion of As concentration in nutrient solution | 第57-58页 |
| ·Arsenic uptake by lettuce | 第58-59页 |
| ·Short-term Arsenic uptake kinetics | 第59-60页 |
| ·DISCUSSION | 第60-61页 |
| ·CONCLUSION | 第61-63页 |
| CHAPTER 5 CONCLUSION AND FUTURE DIRECTIONS | 第63-65页 |
| ·CONCLUSION | 第63-64页 |
| ·FUTURE DIRECTIONS | 第64-65页 |
| REFERENCES | 第65-77页 |
| ACKNOWLEGMENT | 第77-79页 |
| DEDICATION | 第79-80页 |
| RESUME | 第80-81页 |
