Shade stress on maize seedlings biomass production and photosynthetic traits
ABSTRACT: The responses of two maize (Zea mays L.) cultivars, ‘LY336’ (shade tolerant) and ‘LC803’ (shade sensitive), to shade stress in a pot experiment conducted in the 2015 and 2016 growing seasons were investigated. The impact of 50% shade stress treatment on shoot biomass, photosynthetic parame...
| Main Authors: | , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Universidade Federal de Santa Maria
2021-08-01
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| Series: | Ciência Rural |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782022000300201&tlng=en |
| _version_ | 1830380636656893952 |
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| author | Liuzheng Yuan Jiayou Liu Zhiyong Cai Huiqiang Wang Jiafeng Fu Hongtao Zhang Yundong Zhang Shidie Zhu Weihua Wu Haixia Yan Hui Zhang Tianqi Li Lu Zhang Manman Yuan |
| author_facet | Liuzheng Yuan Jiayou Liu Zhiyong Cai Huiqiang Wang Jiafeng Fu Hongtao Zhang Yundong Zhang Shidie Zhu Weihua Wu Haixia Yan Hui Zhang Tianqi Li Lu Zhang Manman Yuan |
| author_sort | Liuzheng Yuan |
| collection | DOAJ |
| description | ABSTRACT: The responses of two maize (Zea mays L.) cultivars, ‘LY336’ (shade tolerant) and ‘LC803’ (shade sensitive), to shade stress in a pot experiment conducted in the 2015 and 2016 growing seasons were investigated. The impact of 50% shade stress treatment on shoot biomass, photosynthetic parameters, chlorophyll fluorescence, and malondialdehyde (MDA) content was evaluated. The shoot biomass of the two maize hybrids was decreased significantly by shade stress treatment, for shade stress 7 d, the LC803 and LY336 were reduced by 56.7% and 44.4% compared with natural light. Chlorophyll fluorescence parameters of LY336 were not significantly affected by shade stress, whereas those of LC803 were significantly affected, the Fo increased under shade stress; however Fm, FV/FM and ΦPSII were decreased under shade stress. Among photosynthetic parameters measured, net photosynthetic rate (Pn), stomatal conductance (Gs), and transpiration rate were significantly decreased compared with natural light, LY336 and LC803 reduction by 28.0%, 22.2%, 57.7% and 35.5%, 18.9%, 62.4%; however, intercellular CO2 concentration (Ci) was significantly increased, for the two cultivars. Under shade stress for different durations (1, 3, 5, 7 d), Pn, Gs, Ci, and MDA content differed significantly between the two cultivars. Results indicated that different maize genotypes showed different responses to shading. Shade-tolerant genotypes are only weakly affected by shade stress. |
| first_indexed | 2024-12-20T09:34:15Z |
| format | Article |
| id | doaj.art-e98ea8b00c254c75b764108bce9cfb52 |
| institution | Directory Open Access Journal |
| issn | 1678-4596 |
| language | English |
| last_indexed | 2024-12-20T09:34:15Z |
| publishDate | 2021-08-01 |
| publisher | Universidade Federal de Santa Maria |
| record_format | Article |
| series | Ciência Rural |
| spelling | doaj.art-e98ea8b00c254c75b764108bce9cfb522022-12-21T19:45:02ZengUniversidade Federal de Santa MariaCiência Rural1678-45962021-08-0152310.1590/0103-8478cr20201022Shade stress on maize seedlings biomass production and photosynthetic traitsLiuzheng Yuanhttps://orcid.org/0000-0001-9761-3839Jiayou Liuhttps://orcid.org/0000-0002-7913-9624Zhiyong Caihttps://orcid.org/0000-0002-9075-6674Huiqiang Wanghttps://orcid.org/0000-0002-3867-5930Jiafeng Fuhttps://orcid.org/0000-0001-9533-6698Hongtao Zhanghttps://orcid.org/0000-0001-9218-2232Yundong Zhanghttps://orcid.org/0000-0001-5458-3107Shidie Zhuhttps://orcid.org/0000-0001-5726-5155Weihua Wuhttps://orcid.org/0000-0002-5916-0979Haixia Yanhttps://orcid.org/0000-0003-2691-1649Hui Zhanghttps://orcid.org/0000-0003-4683-8645Tianqi Lihttps://orcid.org/0000-0002-0870-2555Lu Zhanghttps://orcid.org/0000-0001-8724-6422Manman Yuanhttps://orcid.org/0000-0003-3603-9225ABSTRACT: The responses of two maize (Zea mays L.) cultivars, ‘LY336’ (shade tolerant) and ‘LC803’ (shade sensitive), to shade stress in a pot experiment conducted in the 2015 and 2016 growing seasons were investigated. The impact of 50% shade stress treatment on shoot biomass, photosynthetic parameters, chlorophyll fluorescence, and malondialdehyde (MDA) content was evaluated. The shoot biomass of the two maize hybrids was decreased significantly by shade stress treatment, for shade stress 7 d, the LC803 and LY336 were reduced by 56.7% and 44.4% compared with natural light. Chlorophyll fluorescence parameters of LY336 were not significantly affected by shade stress, whereas those of LC803 were significantly affected, the Fo increased under shade stress; however Fm, FV/FM and ΦPSII were decreased under shade stress. Among photosynthetic parameters measured, net photosynthetic rate (Pn), stomatal conductance (Gs), and transpiration rate were significantly decreased compared with natural light, LY336 and LC803 reduction by 28.0%, 22.2%, 57.7% and 35.5%, 18.9%, 62.4%; however, intercellular CO2 concentration (Ci) was significantly increased, for the two cultivars. Under shade stress for different durations (1, 3, 5, 7 d), Pn, Gs, Ci, and MDA content differed significantly between the two cultivars. Results indicated that different maize genotypes showed different responses to shading. Shade-tolerant genotypes are only weakly affected by shade stress.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782022000300201&tlng=enmaizeshade stressMDAphotosynthetic |
| spellingShingle | Liuzheng Yuan Jiayou Liu Zhiyong Cai Huiqiang Wang Jiafeng Fu Hongtao Zhang Yundong Zhang Shidie Zhu Weihua Wu Haixia Yan Hui Zhang Tianqi Li Lu Zhang Manman Yuan Shade stress on maize seedlings biomass production and photosynthetic traits Ciência Rural maizeshade stress MDA photosynthetic |
| title | Shade stress on maize seedlings biomass production and photosynthetic traits |
| title_full | Shade stress on maize seedlings biomass production and photosynthetic traits |
| title_fullStr | Shade stress on maize seedlings biomass production and photosynthetic traits |
| title_full_unstemmed | Shade stress on maize seedlings biomass production and photosynthetic traits |
| title_short | Shade stress on maize seedlings biomass production and photosynthetic traits |
| title_sort | shade stress on maize seedlings biomass production and photosynthetic traits |
| topic | maizeshade stress MDA photosynthetic |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782022000300201&tlng=en |
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