Relaxing non-photochemical quenching (NPQ) to improve photosynthesis in crops
Sunlight intercepted by crop plants drives photosynthesis and growth. However, the light-harvesting antenna complexes that capture light energy for photosynthesis can also absorb too much light, which enhances the formation for reactive oxygen species and can result in damage to photosynthetic react...
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| Format: | Electronic Book Chapter |
| Language: | English |
| Published: |
Cambridge
Burleigh Dodds Science Publishing
2023
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| Series: | Burleigh Dodds Series in Agricultural Science
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| Subjects: | |
| Online Access: | OAPEN Library: download the publication OAPEN Library: description of the publication |
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| Summary: | Sunlight intercepted by crop plants drives photosynthesis and growth. However, the light-harvesting antenna complexes that capture light energy for photosynthesis can also absorb too much light, which enhances the formation for reactive oxygen species and can result in damage to photosynthetic reaction centres. In order to prevent excessive damage, light-harvesting efficiency is reduced under high light, via upregulation of non-photochemical quenching (NPQ) processes involved in thermal dissipation of excitation energy in the photosystem II antennae. Relaxation of NPQ following high light exposure is not instantaneous and the response time increases with severity and longevity of the high light exposure. Due to slow NPQ relaxation, photosynthetic light use efficiency can be decreased for prolonged periods after high light exposure. In this chapter we review mechanistic understanding of light harvesting and NPQ, how NPQ can be measured and results from recent attempts to accelerate NPQ responses to light. |
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| Physical Description: | 1 electronic resource (18 p.) |
| ISBN: | AS.2022.0119.09 9781801463607 |
| Access: | Open Access |