Post-Silking Shading Stress Affects Leaf Nitrogen Metabolism of Spring Maize in Southern China
Lower sunlight caused by overcast skies from June to July in Southern China is one of the main environmental stresses that frequently occur and affect the post-silking growth and grain development of spring maize. In this study, a field trial involving four maize hybrids as materials was conducted t...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2020-02-01
|
| Series: | Plants |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2223-7747/9/2/210 |
| _version_ | 1798026953742090240 |
|---|---|
| author | Jue Wang Kai Shi Weiping Lu Dalei Lu |
| author_facet | Jue Wang Kai Shi Weiping Lu Dalei Lu |
| author_sort | Jue Wang |
| collection | DOAJ |
| description | Lower sunlight caused by overcast skies from June to July in Southern China is one of the main environmental stresses that frequently occur and affect the post-silking growth and grain development of spring maize. In this study, a field trial involving four maize hybrids as materials was conducted to investigate the effects of post-silking shading stress (30% and 50% light deprivation) on leaf nitrogen metabolism and biomass accumulation during maize growing seasons in 2016 and 2017. Results indicated that 30% and 50% shading stress caused the grain yield to decrease by 47.3% and 69.6%, respectively. Plant post-silking biomass accumulation was decreased by shading, whereas the translocation from pre-silking assimilates in the vegetative organs was increased by shading. This change was sharply observed when the plants were deprived of more sunlight intensity. The leaf relative chlorophyll (soil and plant analyzer development (SPAD) value) and soluble protein contents were considerably decreased by shading under 50% light deprivation condition. The activities of nitrate reductase, glutamine synthetase and glutamate synthase that are involved in nitrogen metabolism were downregulated by shading stresses. In conclusion, nitrogen metabolism was disturbed by shading, which induced the decrease in post-silking dry matter accumulation, ultimately resulting in grain yield loss. |
| first_indexed | 2024-04-11T18:43:40Z |
| format | Article |
| id | doaj.art-f8d60650b4b3419a915603eeb1171685 |
| institution | Directory Open Access Journal |
| issn | 2223-7747 |
| language | English |
| last_indexed | 2024-04-11T18:43:40Z |
| publishDate | 2020-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Plants |
| spelling | doaj.art-f8d60650b4b3419a915603eeb11716852022-12-22T04:08:54ZengMDPI AGPlants2223-77472020-02-019221010.3390/plants9020210plants9020210Post-Silking Shading Stress Affects Leaf Nitrogen Metabolism of Spring Maize in Southern ChinaJue Wang0Kai Shi1Weiping Lu2Dalei Lu3Jiangsu Key Laboratory of Crop Genetics and Physiology/Co-Innovation Center for Modern Production Technology of Grain Crops/Joint International Research Laboratory of Agriculture and Agri-Product Safety of the Ministry of Education of China, Yangzhou University, Yangzhou 225009, ChinaJiangsu Key Laboratory of Crop Genetics and Physiology/Co-Innovation Center for Modern Production Technology of Grain Crops/Joint International Research Laboratory of Agriculture and Agri-Product Safety of the Ministry of Education of China, Yangzhou University, Yangzhou 225009, ChinaJiangsu Key Laboratory of Crop Genetics and Physiology/Co-Innovation Center for Modern Production Technology of Grain Crops/Joint International Research Laboratory of Agriculture and Agri-Product Safety of the Ministry of Education of China, Yangzhou University, Yangzhou 225009, ChinaAgricultural College, Yangzhou University, Yangzhou 225009, ChinaLower sunlight caused by overcast skies from June to July in Southern China is one of the main environmental stresses that frequently occur and affect the post-silking growth and grain development of spring maize. In this study, a field trial involving four maize hybrids as materials was conducted to investigate the effects of post-silking shading stress (30% and 50% light deprivation) on leaf nitrogen metabolism and biomass accumulation during maize growing seasons in 2016 and 2017. Results indicated that 30% and 50% shading stress caused the grain yield to decrease by 47.3% and 69.6%, respectively. Plant post-silking biomass accumulation was decreased by shading, whereas the translocation from pre-silking assimilates in the vegetative organs was increased by shading. This change was sharply observed when the plants were deprived of more sunlight intensity. The leaf relative chlorophyll (soil and plant analyzer development (SPAD) value) and soluble protein contents were considerably decreased by shading under 50% light deprivation condition. The activities of nitrate reductase, glutamine synthetase and glutamate synthase that are involved in nitrogen metabolism were downregulated by shading stresses. In conclusion, nitrogen metabolism was disturbed by shading, which induced the decrease in post-silking dry matter accumulation, ultimately resulting in grain yield loss.https://www.mdpi.com/2223-7747/9/2/210shadingnitrogen metabolismdry mattergrain yieldmaizespad |
| spellingShingle | Jue Wang Kai Shi Weiping Lu Dalei Lu Post-Silking Shading Stress Affects Leaf Nitrogen Metabolism of Spring Maize in Southern China Plants shading nitrogen metabolism dry matter grain yield maize spad |
| title | Post-Silking Shading Stress Affects Leaf Nitrogen Metabolism of Spring Maize in Southern China |
| title_full | Post-Silking Shading Stress Affects Leaf Nitrogen Metabolism of Spring Maize in Southern China |
| title_fullStr | Post-Silking Shading Stress Affects Leaf Nitrogen Metabolism of Spring Maize in Southern China |
| title_full_unstemmed | Post-Silking Shading Stress Affects Leaf Nitrogen Metabolism of Spring Maize in Southern China |
| title_short | Post-Silking Shading Stress Affects Leaf Nitrogen Metabolism of Spring Maize in Southern China |
| title_sort | post silking shading stress affects leaf nitrogen metabolism of spring maize in southern china |
| topic | shading nitrogen metabolism dry matter grain yield maize spad |
| url | https://www.mdpi.com/2223-7747/9/2/210 |
| work_keys_str_mv | AT juewang postsilkingshadingstressaffectsleafnitrogenmetabolismofspringmaizeinsouthernchina AT kaishi postsilkingshadingstressaffectsleafnitrogenmetabolismofspringmaizeinsouthernchina AT weipinglu postsilkingshadingstressaffectsleafnitrogenmetabolismofspringmaizeinsouthernchina AT daleilu postsilkingshadingstressaffectsleafnitrogenmetabolismofspringmaizeinsouthernchina |