| 摘要 | 第6-8页 |
| ABSTRACT | 第8-10页 |
| CHAPTER 1: INTRODUCTION | 第13-30页 |
| 1.1Heavy metals in the environment: challenge for plants | 第13-15页 |
| 1.2 Nickel toxicity: effect on plant growth, oxidative metabolism, and mineral nutrient status | 第15-19页 |
| 1.3 Mercury toxicity: effects on plant growth, oxidative metabolism, and mineral nutrient status | 第19-22页 |
| 1.4 Lead toxicity: effect on plant growth, oxidative metabolism, and mineral nutrient status | 第22-25页 |
| 1.5 Significance of N, P, or K nutrition in plant growth | 第25-26页 |
| 1.6 Seed priming (selenium, salicylic acid) and heavy metal toxicity | 第26-29页 |
| 1.7 Objectives | 第29-30页 |
| CHAPTER 2: GROWTH, OXIDATIVE STRESS, AND MINERAL NUTRIENT STATUS IN PRIMED AND NON-PRIMED RICE SEEDLINGS UNDER NICKEL TOXICITY ANDDIFFERENT NUTRIENT MANAGEMENT REGIMES | 第30-59页 |
| 2.1 Introduction | 第30-32页 |
| 2.2 Material and methods | 第32-35页 |
| 2.2.1 Seed procurement, treatments, and growth conditions | 第32-33页 |
| 2.2.2 Evaluation of rice seedling growth and oxidative metabolism | 第33-34页 |
| 2.2.3 Measurements of nutrient elements and Ni concentrations in the rice shoots and roots | 第34-35页 |
| 2.2.4 Statistical analysis | 第35页 |
| 2.3 Results | 第35-51页 |
| 2.3.1 Rice seedling growth | 第35-36页 |
| 2.3.2 Accumulation of reactive oxygen species and lipid peroxidation rate in rice leaves | 第36-38页 |
| 2.3.3 Activities of monoamine oxidase and xanthine oxidase in rice leaves | 第38-39页 |
| 2.3.4 Activities of enzymatic antioxidants in the rice leaves | 第39-41页 |
| 2.3.5 Non-Enzymatic Antioxidants | 第41-43页 |
| 2.3.6 Macronutrient concentrations in the shoot and root of rice seedlings | 第43-47页 |
| 2.3.7 Micronutrient concentrations | 第47-51页 |
| 2.4 Discussion | 第51-58页 |
| 2.4.1 Interaction of Ni toxicity and N-, or P-deprivation caused severe oxidative stress in non-primed rice seedlings | 第51-54页 |
| 2.4.2 Seed priming triggered the antioxidant defense system and alleviated the stress-evokedadversities in rice seedlings | 第54页 |
| 2.4.3 Ni toxicity disrupted the mineral nutrient status of rice seedlings under different nutrientmanagement regimes | 第54-57页 |
| 2.4.4 Ni accumulation in rice seedlings varied with nutrient management regime and seedpriming treatments | 第57-58页 |
| 2.5 Conclusions | 第58-59页 |
| CHAPTER 3: INTERACTION OF MERCURY STRESS AND N-, P-, OR K-DEPRIVATION IN PRIMED AND NON-PRIMED RICE SEEDLINGS: CONSEQUENCES ON GROWTH, REDOX STATUS, ANTIOXIDANT RESPONSE, AND IONIC HOMEOSTASIS | 第59-83页 |
| 3.1 Introduction | 第59-62页 |
| 3.2 Material and methods | 第62页 |
| 3.3 Results | 第62-78页 |
| 3.3.1 Rice seedling growth | 第62-64页 |
| 3.3.2 ROS accumulation | 第64-65页 |
| 3.3.3 Lipid peroxidation rate | 第65页 |
| 3.3.4 ROS-producing enzymes | 第65-68页 |
| 3.3.5 Enzymatic antioxidants | 第68页 |
| 3.3.6 Non-enzymatic antioxidants and total antioxidant capability (T-AOC) | 第68-73页 |
| 3.3.7 Total proteins content, nitric oxide content, glutamine synthase activity and glutamic acidcontent | 第73页 |
| 3.3.8 Shoot and root concentrations of N, P and K | 第73-74页 |
| 3.3.9 Shoot and root concentrations of Mg and Ca | 第74-78页 |
| 3.4 Discussion | 第78-82页 |
| 3.5 Conclusions | 第82-83页 |
| CHAPTER 4: HETEROGENEITY OF GROWTH, OXIDATIVE METABOLISM, NUTRIENT ACCUMULATION AND NUTRIENT TRANSPORT IN PRIMED AND NON-PRIMED RICE SEEDLINGS UNDER LEAD TOXICITY AND DEPRIVATION OF N, P, ORK | 第83-110页 |
| 4.1 Introduction | 第83-86页 |
| 4.2 Materials and methods | 第86-87页 |
| 4.3 Results | 第87-101页 |
| 4.3.1 Rice seedling growth | 第87-88页 |
| 4.3.2 Reactive oxygen species and lipid peroxidation rate | 第88页 |
| 4.3.3 Activities of antioxidant enzymes and GSH content | 第88-92页 |
| 4.3.4 Nutrient accumulation in shoot and root of rice seedlings | 第92-101页 |
| 4.4 Discussion | 第101-109页 |
| 4.4.1 Rice seedling growth and oxidative metabolism under different nutrient managementregimes | 第101-103页 |
| 4.4.2 Macro and micro nutrient uptake and translocation under different nutrient regimes | 第103-104页 |
| 4.4.3 Pb stress reduced rice growth by altering oxidative metabolism and plant nutrient balance | 第104-106页 |
| 4.4.4 Seed priming alleviated the Pb-induced inhibitions of rice seedling growth under all thenutrient management regimes | 第106-107页 |
| 4.4.5 Seed priming maintained the nutrient status of rice seedlings under Pb stress and differentnutrient management regimes | 第107-109页 |
| 4.5 Conclusions | 第109-110页 |
| CHAPTER 5: SUMMARY | 第110-113页 |
| REFERENCES | 第113-143页 |
| Acknowledgements | 第143页 |
