Abstract | 第8-11页 |
摘要 | 第12-18页 |
Chapter 1: Research background and objectives | 第18-44页 |
1.1. Review of literature | 第18-41页 |
1.1.1. Chilling stress | 第20-24页 |
1.1.1.1. Chilling stress and plant growth | 第21-22页 |
1.1.1.2. Chilling stress and oxidative metabolism in plants | 第22-23页 |
1.1.1.3. Chilling stress and nutrient aquistion in plants | 第23-24页 |
1.1.2. Salinity stress | 第24-29页 |
1.1.2.1. Salinity stress and plant growth | 第25-26页 |
1.1.2.2. Salinity stress and oxidative metabolism in plants | 第26-27页 |
1.1.2.3. Salinity stress and nutrient acquisition in plants | 第27-29页 |
1.1.3. Drought stress | 第29-33页 |
1.1.3.1. Drought stress and plant growth | 第29-30页 |
1.1.3.2. Drought stress and oxidative metabolism in plants | 第30-32页 |
1.1.3.3. Drought stress and nutrient aquistion in plants | 第32-33页 |
1.1.4. Cadmium stress | 第33-36页 |
1.1.4.1. Cadmium stress and plant growth | 第33-34页 |
1.1.4.2. Cadmium stress and oxidative metabolism in plants | 第34-35页 |
1.1.4.3. Cadmium stress and nutrient aquisition in plants | 第35-36页 |
1.1.5. Nutrient deficiency/deprivation | 第36-40页 |
1.1.5.1. Plant growth and physiology under N, P and K deficiency/deprivation | 第36-38页 |
1.1.5.2. Oxidative metabolism in plants under N, P and K deficiency/deprivation | 第38页 |
1.1.5.3. Acquisition of mineral elements in plants under N, P and K deficiency/deprivation | 第38-40页 |
1.1.6. Rice seed priming to enhance abiotic stress tolerance in plants | 第40-41页 |
1.2. Objectives | 第41-44页 |
1.2.1. General objectives and novelty points | 第41-42页 |
1.2.2. Specific objectives | 第42-44页 |
Chapter 2: Physiological and biochemical understanding of seed priming-induced chilling tolerance in rice | 第44-61页 |
2.1. Introduction | 第44-45页 |
2.2. Materials and methods | 第45-48页 |
2.2.1. Plant material | 第45-46页 |
2.2.2. Experimental details | 第46页 |
2.2.3. Observations | 第46-48页 |
2.2.4. Statistical analysis | 第48页 |
2.3. Results | 第48-55页 |
2.3.1. Seed priming enhanced the speed and rate of rice germination under chilling stress | 第48-49页 |
2.3.2. Seed priming alleviated the chilling-induced inhibition of rice seedling growth | 第49-50页 |
2.3.3. Seed priming regulated the starch metabolism in rice seedlings under chilling stress | 第50-51页 |
2.3.4. Seed priming circumvented the chilling-induced effects on respiration rate | 第51-53页 |
2.3.5. Seed priming increased the accumulation of free proline under chilling stress | 第53-54页 |
2.3.6. Seed priming maintained the membrane integrity by moderating the chilling-induced increases in MDA and H2O2 content | 第54-55页 |
2.3.7. Seed priming triggered the activities of antioxidant enzymes and enhancedGSH content under chilling stress | 第55页 |
2.4. Discussion | 第55-60页 |
2.5. Conclusions | 第60-61页 |
Chapter 3: Seed priming alters the production and detoxification of reactive oxygen species in rice seedlings grown under sub-optimal temperature and nutrient supply | 第61-80页 |
3.1. Introduction | 第61-62页 |
3.2. Materials and Methods | 第62-65页 |
3.2.1. Plant material | 第62-63页 |
3.2.2. Experimentation | 第63页 |
3.2.3. Evaluation of rice seedling growth, oxidative metabolism, and other biochemical attributes | 第63-65页 |
3.2.4. Statistical analysis | 第65页 |
3.3. Results | 第65-74页 |
3.3.1. Seedling growth | 第65-67页 |
3.3.2. Lipid peroxidation and ROS-accumulation | 第67-68页 |
3.3.3. Monoamine oxidase and xanthine oxidase activities | 第68-69页 |
3.3.4. Enzymatic antioxidants | 第69-71页 |
3.3.5. Non-enzymatic antioxidants | 第71页 |
3.3.6. Total antioxidant capability | 第71-72页 |
3.3.7. Nitric oxide content | 第72-73页 |
3.3.8. Glutamine synthase activity, glutamic acid content, and soluble proteins content | 第73-74页 |
3.4. Discussion | 第74-78页 |
3.5. Conclusions | 第78-80页 |
Chapter 4: Nutrient acquisition in primed and non-primed rice seedlings under low temperature and N-, P-, or K-deprivation | 第80-95页 |
4.1. Introduction | 第80-81页 |
4.2. Material and methods | 第81-82页 |
4.2.1. Determination of seedling dry biomass | 第81页 |
4.2.3. Nutrient element measurements | 第81-82页 |
4.3. Results | 第82-91页 |
4.3.1. Dry biomass | 第82页 |
4.3.2. Macronutrient concentrations | 第82-86页 |
4.3.3. Micronutrient concentrations | 第86-91页 |
4.4. Discussion | 第91-94页 |
4.5. Conclusions | 第94-95页 |
Chapter 5: Leaves of rice seedlings emerged from primed seeds showed stronger antioxidative defense system under high salinity and low nutrient regimes | 第95-108页 |
5.1. Introduction | 第95-96页 |
5.2. Materials and methods | 第96-97页 |
5.3. Results | 第97-102页 |
5.3.1. Accumulation of reactive oxygen species and lipid peroxidation rate in riceleaves | 第97页 |
5.3.2. Activities of monoamine oxidase and xanthine oxidase in rice leaves | 第97-99页 |
5.3.3. Activities of enzymatic antioxidants in the rice leaves | 第99-101页 |
5.3.4. Levels of non-enzymatic antioxidantsin rice leaves | 第101页 |
5.3.5. Total antioxidant capability in rice seedlings | 第101-102页 |
5.4. Discussion | 第102-107页 |
5.5. Conclusions | 第107-108页 |
Chapter 6: Salinity stress and NPK deprivation in rice: Consequences on growth and nutrient status of primed and non-primed rice seedlings | 第108-130页 |
6.1. Introduction | 第108-109页 |
6.2. Material and methods | 第109页 |
6.3. Results | 第109-120页 |
6.3.1. Seedling growth | 第109-111页 |
6.3.2. Macronutrient concentrations in shoot and root of rice seedlings | 第111-114页 |
6.3.3. Micronutrient concentrations in shoot and root of rice seedlings | 第114-119页 |
6.3.4. Sodium concentrations in the shoot and root of rice seedlings | 第119-120页 |
6.4. Discussion | 第120-129页 |
6.5. Conclusions | 第129-130页 |
Chapter 7: Leaf oxidative status and antioxidant responses in rice differ after seed priming under drought and nutrient stresses | 第130-143页 |
7.1. Introduction | 第130-131页 |
7.2. Materials and methods | 第131-132页 |
7.3. Results | 第132-136页 |
7.3.1. Leaf ROS accumulation and lipid peroxidation rate | 第132-133页 |
7.3.2. ROS producing enzymes | 第133-134页 |
7.3.3. Enzymatic antioxidants | 第134-135页 |
7.3.4. Non-enzymatic antioxidants and total antioxidant capability | 第135-136页 |
7.4. Discussion | 第136-141页 |
7.5. Conclusions | 第141-143页 |
Chapter 8: Interactive effects of limited moisture and nutrient supply on growth and ionic status of primed and non-primed rice seedlings | 第143-164页 |
8.1. Introduction | 第143-144页 |
8.2. Material and methods | 第144页 |
8.3. Results | 第144-155页 |
8.3.1. Seedling growth | 第144-146页 |
8.3.2. Macronutrient concentrations in the shoot and root of rice seedlings | 第146-149页 |
8.3.3. Micronutrient concentrations | 第149-155页 |
8.4. Discussion | 第155-163页 |
8.4.1. Effect of N-, P-, and K-deprivation on seedling growth of rice | 第156-157页 |
8.4.2. Effect of drought on seedling growth of rice | 第157-158页 |
8.4.3. Effect of seed priming on the seedling growth of rice under drought stress and different nutrient management regimes | 第158-159页 |
8.4.4. Effect of N-, P-, and K-deprivation on nutrient status of rice seedlings | 第159-160页 |
8.4.5. Effect of drought stress on nutrient status of rice seedlings | 第160-162页 |
8.4.6. Effect of seed priming on the nutrient status of rice seedlings under drought stress and different nutrient management regimes | 第162-163页 |
8.5. Conclusions | 第163-164页 |
Chapter 9: Interaction of cadmium stress and nutrient (N, P, K) deprivation on growth, redox status, antioxidant enzymes and proteins in the leaves of primed and non-primed rice seedlings | 第164-186页 |
9.1. Introduction | 第164-165页 |
9.2. Materials and methods | 第165-167页 |
9.3. Results | 第167-179页 |
9.3.1. Rice seedlings growth | 第167-170页 |
9.3.2. Reactive oxygen species | 第170页 |
9.3.3. Lipid peroxidation | 第170-171页 |
9.3.4. Monoamine oxidase and xanthine oxidase activities | 第171-173页 |
9.3.5. Enzymatic antioxidants | 第173-176页 |
9.3.6. Non-enzymatic antioxidants | 第176页 |
9.3.7. Total antioxidant capability | 第176-178页 |
9.3.8. Nitric oxide and protein content | 第178-179页 |
9.4. Discussion | 第179-184页 |
9.5. Conclusions | 第184-186页 |
Chapter 10: Heterogeneities of nutrient accumulation and transport in primed and non-primed rice seedlings under limited nutrient supply and cadmium toxicity | 第186-211页 |
10.1. Introduction | 第186-187页 |
10.2. Material and methods | 第187页 |
10.3. Results | 第187-205页 |
10.3.1. Macronutrient concentrations in shoot and root of rice seedlings | 第187-195页 |
10.3.2. Micronutrient concentrations in shoot and root of rice seedlings | 第195-204页 |
10.3.3. Cadmium concentrations in shoot and root of rice seedlings | 第204-205页 |
10.4. Discussion | 第205-209页 |
10.5. Conclusions | 第209-211页 |
Chapter 11: General conclusions and future research | 第211-219页 |
References | 第219-258页 |
Acknowledgements | 第258-259页 |
Scientific contribution | 第259-260页 |