Current Understanding of Leaf Senescence in Rice
Leaf senescence, which is the last developmental phase of plant growth, is controlled by multiple genetic and environmental factors. Leaf yellowing is a visual indicator of senescence due to the loss of the green pigment chlorophyll. During senescence, the methodical disassembly of macromolecules oc...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-04-01
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| Series: | International Journal of Molecular Sciences |
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| Online Access: | https://www.mdpi.com/1422-0067/22/9/4515 |
| _version_ | 1797536269349158912 |
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| author | Sichul Lee Celine Masclaux-Daubresse |
| author_facet | Sichul Lee Celine Masclaux-Daubresse |
| author_sort | Sichul Lee |
| collection | DOAJ |
| description | Leaf senescence, which is the last developmental phase of plant growth, is controlled by multiple genetic and environmental factors. Leaf yellowing is a visual indicator of senescence due to the loss of the green pigment chlorophyll. During senescence, the methodical disassembly of macromolecules occurs, facilitating nutrient recycling and translocation from the sink to the source organs, which is critical for plant fitness and productivity. Leaf senescence is a complex and tightly regulated process, with coordinated actions of multiple pathways, responding to a sophisticated integration of leaf age and various environmental signals. Many studies have been carried out to understand the leaf senescence-associated molecular mechanisms including the chlorophyll breakdown, phytohormonal and transcriptional regulation, interaction with environmental signals, and associated metabolic changes. The metabolic reprogramming and nutrient recycling occurring during leaf senescence highlight the fundamental role of this developmental stage for the nutrient economy at the whole plant level. The strong impact of the senescence-associated nutrient remobilization on cereal productivity and grain quality is of interest in many breeding programs. This review summarizes our current knowledge in rice on (i) the actors of chlorophyll degradation, (ii) the identification of stay-green genotypes, (iii) the identification of transcription factors involved in the regulation of leaf senescence, (iv) the roles of leaf-senescence-associated nitrogen enzymes on plant performance, and (v) stress-induced senescence. Compiling the different advances obtained on rice leaf senescence will provide a framework for future rice breeding strategies to improve grain yield. |
| first_indexed | 2024-03-10T11:57:18Z |
| format | Article |
| id | doaj.art-b98e5d657177436eaa795cabb3248edd |
| institution | Directory Open Access Journal |
| issn | 1661-6596 1422-0067 |
| language | English |
| last_indexed | 2024-03-10T11:57:18Z |
| publishDate | 2021-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | International Journal of Molecular Sciences |
| spelling | doaj.art-b98e5d657177436eaa795cabb3248edd2023-11-21T17:13:25ZengMDPI AGInternational Journal of Molecular Sciences1661-65961422-00672021-04-01229451510.3390/ijms22094515Current Understanding of Leaf Senescence in RiceSichul Lee0Celine Masclaux-Daubresse1Center for Plant Aging Research, Institute for Basic Science (IBS), Daegu 42988, KoreaInstitut Jean-Pierre Bourgin, INRAE, AgroParisTech, Université Paris-Saclay, 78000 Versailles, FranceLeaf senescence, which is the last developmental phase of plant growth, is controlled by multiple genetic and environmental factors. Leaf yellowing is a visual indicator of senescence due to the loss of the green pigment chlorophyll. During senescence, the methodical disassembly of macromolecules occurs, facilitating nutrient recycling and translocation from the sink to the source organs, which is critical for plant fitness and productivity. Leaf senescence is a complex and tightly regulated process, with coordinated actions of multiple pathways, responding to a sophisticated integration of leaf age and various environmental signals. Many studies have been carried out to understand the leaf senescence-associated molecular mechanisms including the chlorophyll breakdown, phytohormonal and transcriptional regulation, interaction with environmental signals, and associated metabolic changes. The metabolic reprogramming and nutrient recycling occurring during leaf senescence highlight the fundamental role of this developmental stage for the nutrient economy at the whole plant level. The strong impact of the senescence-associated nutrient remobilization on cereal productivity and grain quality is of interest in many breeding programs. This review summarizes our current knowledge in rice on (i) the actors of chlorophyll degradation, (ii) the identification of stay-green genotypes, (iii) the identification of transcription factors involved in the regulation of leaf senescence, (iv) the roles of leaf-senescence-associated nitrogen enzymes on plant performance, and (v) stress-induced senescence. Compiling the different advances obtained on rice leaf senescence will provide a framework for future rice breeding strategies to improve grain yield.https://www.mdpi.com/1422-0067/22/9/4515riceleaf senescenceproductivitychlorophyll breakdownstay-greentranscription factors |
| spellingShingle | Sichul Lee Celine Masclaux-Daubresse Current Understanding of Leaf Senescence in Rice International Journal of Molecular Sciences rice leaf senescence productivity chlorophyll breakdown stay-green transcription factors |
| title | Current Understanding of Leaf Senescence in Rice |
| title_full | Current Understanding of Leaf Senescence in Rice |
| title_fullStr | Current Understanding of Leaf Senescence in Rice |
| title_full_unstemmed | Current Understanding of Leaf Senescence in Rice |
| title_short | Current Understanding of Leaf Senescence in Rice |
| title_sort | current understanding of leaf senescence in rice |
| topic | rice leaf senescence productivity chlorophyll breakdown stay-green transcription factors |
| url | https://www.mdpi.com/1422-0067/22/9/4515 |
| work_keys_str_mv | AT sichullee currentunderstandingofleafsenescenceinrice AT celinemasclauxdaubresse currentunderstandingofleafsenescenceinrice |