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Effects of Shading on the Senescence and Photosynthetic Physiology of the Early-Flowering Rice Mutant FTL10 at Noon
- Source :
- Journal of Plant Growth Regulation. 39:776-784
- Publication Year :
- 2019
- Publisher :
- Springer Science and Business Media LLC, 2019.
-
Abstract
- FTL10 is an early-flowering mutant of rice (Oryza sativa L.) with a premature senescent phenotype. Early leaf senescence can cause negative effects on rice yield. Moreover, rice leaves are damaged under high-light conditions, which promote rice senescence. Artificial shading can reduce the amount of light absorbed by rice leaves. The aim of this study was to investigate the effects of shading at noon (11:30–14:00) on the senescence and yield of FTL10. The results showed that shading improved the total antioxidant capacity of rice leaves, reduced the accumulation of reactive oxygen species (ROS) and reduced the expression of genes related to senescence. In the shaded group, the degradation rate of chlorophyll and Rubisco proteins, which are related to photosynthesis, was relatively slow, and the photosynthetic rate was relatively high. Compared with those under the natural growth conditions, the proportion of photosynthetic electron allocated to photorespiration in the shaded group rice leaves was lower, and the proportion allocated to carbon fixation was higher. The yield data showed that the single-spike weight and yield per plant of rice significantly increased after shading. Therefore, our research shows that shading at noon could delay FTL10 senescence and increase yields.
- Subjects :
- 0106 biological sciences
0301 basic medicine
Senescence
Oryza sativa
biology
fungi
RuBisCO
food and beverages
Plant physiology
Plant Science
Photosynthesis
01 natural sciences
03 medical and health sciences
chemistry.chemical_compound
Horticulture
030104 developmental biology
chemistry
Chlorophyll
biology.protein
Photorespiration
Shading
Agronomy and Crop Science
010606 plant biology & botany
Subjects
Details
- ISSN :
- 14358107 and 07217595
- Volume :
- 39
- Database :
- OpenAIRE
- Journal :
- Journal of Plant Growth Regulation
- Accession number :
- edsair.doi...........6833c0724a8f1eb65d4a826f4064dea6