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1. Introduction
2. Senescence definition
3. Senescence is universal
4. Selective senescence death
5. Senescence limits resource capture
6. Photosynthesis during grass leaf senescence
7. Senescence is important for recycling
8. Nitrogen during maize ear leaf senescence
9. Senescence as an adaptation to stress
10. Tactical and strategic senescence
11. Senescence and fitness
12. An environmental challenge at the wrong time
13. Senescence and cellulat transdifferentiation
14. The plastid differentiation network (1)
15. Senescence and autolysis
16. The plant cell vacuole
17. The chloroplast to gerontoplast transition
18. Characteristic metabolism of the gerontoplast
19. Chlorophyll catabolism
20. Chlorophyll and its breakdown
21. Chlorophyll colour lost during senescence
22. Pathway of chlorophyll catabolism in senescence
23. Breakdown of proteins
24. Plastids as a source of abundant proteins
25. Regulation of proteins during senescence
26. Recycling amino nitrogen
27. Interconversions of amino acids
28. Gluconeogenesis
29. Glyoxylate cycle and the reversal of glycolysis
30. Stress defences
31. New pigments and chemistry in senescing leaves
32. The pathways of phenolic metabolism
33. Genetics and molecular biology of gerontoplasts
34. Gerontoplast mutants and genetic variants
35. Cosmetic stay-green phenotype
36. Functional stay-green phenotype
37. Expression of senescence genes
38. Functional classes of SAGs
39. Genomics of senescence
40. Visualisation of gene chip patterns
41. Genevestigator expression profile
42. RNAi knockout of At4g22920 in Arabidopsis
43. Manipulation of the transition to gerontoplast
44. Altering senescence by transposon mutagenesis
45. Cytokinin - an inhibitor of plastid senescence
46. Ethylene - a promoter of plastid senescence
47. Applied genetics of plastid senescence
48. The relationship of senescence to yield in wheat
49. Molecular breeding for stress tolerance
50. Reversibility of plastid senescence
51. Tobacco leaf senescence and re-greening
52. The plastid differentiation network (2)
53. Chloro/geronto/chromoplast interrelationships
54. Plastid senescence in unicellular algae
55. Gerontoplasts predate chromoplasts in evolution
56. Floral parts and fruit tissues with chromoplasts
57. The plastid differentiation network (3)
58. Summary
59. Further reading

Topics Covered

• Critical role of senescence in plant growth, development, survival and adaptation
• The senescing chloroplast (gerontoplast) as a phase of plastid differentiation
• New biochemistry and gene expression in the chloroplast-to-gerontoplast transition
• Reversibility, manipulation and exploitation of plastid senescence
• Evolutionary origins of plastid senescence

Links

Series:

• Chloroplast

Categories:

• Biochemistry
• Cell Biology
• Plant & Animal Sciences

Talk Citation

Publication History

• Published on October 1, 2007

Financial Disclosures

• Prof. Howard Thomas has not informed HSTalks of any commercial/financial relationship that it is appropriate to disclose.