Distinct responses in sexual reproduction onset and growth of Chara braunii Gmelin to light level and temperature: evidence from a greenhouse experiment
AbstractThe importance of oospores in the ecology and life cycle of annual charophyte species is now widely recognized. To elucidate the primary factor that determines the timing (onset) of sexual reproduction, a controlled 3 × 2 factorial experiment with various light levels (100%, 50% and 10% of n...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Taylor & Francis Group
2023-07-01
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| Series: | Journal of Freshwater Ecology |
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| Online Access: | https://www.tandfonline.com/doi/10.1080/02705060.2023.2187468 |
| _version_ | 1797393283028090880 |
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| author | Heyun Wang Yi Zhou Rui Hu Kuang Chen Junge Chen |
| author_facet | Heyun Wang Yi Zhou Rui Hu Kuang Chen Junge Chen |
| author_sort | Heyun Wang |
| collection | DOAJ |
| description | AbstractThe importance of oospores in the ecology and life cycle of annual charophyte species is now widely recognized. To elucidate the primary factor that determines the timing (onset) of sexual reproduction, a controlled 3 × 2 factorial experiment with various light levels (100%, 50% and 10% of natural irradiance) and temperatures (25 °C and 20 °C) was conducted to assess their interactive effects on Chara braunii Gmelin under greenhouse conditions. Results revealed that when the light level decreased from 100% to 10% of natural irradiance, the occurrence of gametangia was postponed for 8 days and the proportions of branch whorls with gametangia (PG) and oospores (PO) significantly decreased under high-temperature conditions. Decreased temperature significantly delayed the emergence of gametangia (100% of light levels for 10 days, 50% of light level for 6 days) and decreased PG and PO. Under low-temperature conditions, no gametangia were found at the lowest light level (10/20). This indicated that the combination of low light and low temperature could result in the absence of sexual reproduction in C. braunii. Furthermore, the internode length, dry weight length ratio and pigment pattern of cultured C. braunii were also significantly altered in response to different light levels and temperature treatments. Two-way ANOVA analysis revealed that temperature contributed more to PG and PO than light levels, while light levels contributed more to morphology and pigment ratio than temperature. This might suggest distinct responses of sexual reproduction onset and growth of C. braunii to varied light level and temperature. |
| first_indexed | 2024-03-09T00:00:01Z |
| format | Article |
| id | doaj.art-ad9dac6368f04873abd6c5c25ba5839e |
| institution | Directory Open Access Journal |
| issn | 0270-5060 2156-6941 |
| language | English |
| last_indexed | 2024-03-09T00:00:01Z |
| publishDate | 2023-07-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Journal of Freshwater Ecology |
| spelling | doaj.art-ad9dac6368f04873abd6c5c25ba5839e2023-12-12T20:20:41ZengTaylor & Francis GroupJournal of Freshwater Ecology0270-50602156-69412023-07-0138110.1080/02705060.2023.2187468Distinct responses in sexual reproduction onset and growth of Chara braunii Gmelin to light level and temperature: evidence from a greenhouse experimentHeyun Wang0Yi Zhou1Rui Hu2Kuang Chen3Junge Chen4Key Laboratory of Ecological Remediation for Lakes-Rivers & Algal Utilization of Hubei Province, Innovation Demonstration Base of Ecological Environment Geotechnical and Ecological Restoration of Rivers and Lakes, School of Civil Engineering, Architecture and Environment, Hubei University of Technology, Wuhan, PR ChinaKey Laboratory of Ecological Remediation for Lakes-Rivers & Algal Utilization of Hubei Province, Innovation Demonstration Base of Ecological Environment Geotechnical and Ecological Restoration of Rivers and Lakes, School of Civil Engineering, Architecture and Environment, Hubei University of Technology, Wuhan, PR ChinaKey Laboratory of Ecological Remediation for Lakes-Rivers & Algal Utilization of Hubei Province, Innovation Demonstration Base of Ecological Environment Geotechnical and Ecological Restoration of Rivers and Lakes, School of Civil Engineering, Architecture and Environment, Hubei University of Technology, Wuhan, PR ChinaKey Laboratory of Ecological Remediation for Lakes-Rivers & Algal Utilization of Hubei Province, Innovation Demonstration Base of Ecological Environment Geotechnical and Ecological Restoration of Rivers and Lakes, School of Civil Engineering, Architecture and Environment, Hubei University of Technology, Wuhan, PR ChinaKey Laboratory of Ecological Remediation for Lakes-Rivers & Algal Utilization of Hubei Province, Innovation Demonstration Base of Ecological Environment Geotechnical and Ecological Restoration of Rivers and Lakes, School of Civil Engineering, Architecture and Environment, Hubei University of Technology, Wuhan, PR ChinaAbstractThe importance of oospores in the ecology and life cycle of annual charophyte species is now widely recognized. To elucidate the primary factor that determines the timing (onset) of sexual reproduction, a controlled 3 × 2 factorial experiment with various light levels (100%, 50% and 10% of natural irradiance) and temperatures (25 °C and 20 °C) was conducted to assess their interactive effects on Chara braunii Gmelin under greenhouse conditions. Results revealed that when the light level decreased from 100% to 10% of natural irradiance, the occurrence of gametangia was postponed for 8 days and the proportions of branch whorls with gametangia (PG) and oospores (PO) significantly decreased under high-temperature conditions. Decreased temperature significantly delayed the emergence of gametangia (100% of light levels for 10 days, 50% of light level for 6 days) and decreased PG and PO. Under low-temperature conditions, no gametangia were found at the lowest light level (10/20). This indicated that the combination of low light and low temperature could result in the absence of sexual reproduction in C. braunii. Furthermore, the internode length, dry weight length ratio and pigment pattern of cultured C. braunii were also significantly altered in response to different light levels and temperature treatments. Two-way ANOVA analysis revealed that temperature contributed more to PG and PO than light levels, while light levels contributed more to morphology and pigment ratio than temperature. This might suggest distinct responses of sexual reproduction onset and growth of C. braunii to varied light level and temperature.https://www.tandfonline.com/doi/10.1080/02705060.2023.2187468Charasexual reproductionlighttemperaturegametangia |
| spellingShingle | Heyun Wang Yi Zhou Rui Hu Kuang Chen Junge Chen Distinct responses in sexual reproduction onset and growth of Chara braunii Gmelin to light level and temperature: evidence from a greenhouse experiment Journal of Freshwater Ecology Chara sexual reproduction light temperature gametangia |
| title | Distinct responses in sexual reproduction onset and growth of Chara braunii Gmelin to light level and temperature: evidence from a greenhouse experiment |
| title_full | Distinct responses in sexual reproduction onset and growth of Chara braunii Gmelin to light level and temperature: evidence from a greenhouse experiment |
| title_fullStr | Distinct responses in sexual reproduction onset and growth of Chara braunii Gmelin to light level and temperature: evidence from a greenhouse experiment |
| title_full_unstemmed | Distinct responses in sexual reproduction onset and growth of Chara braunii Gmelin to light level and temperature: evidence from a greenhouse experiment |
| title_short | Distinct responses in sexual reproduction onset and growth of Chara braunii Gmelin to light level and temperature: evidence from a greenhouse experiment |
| title_sort | distinct responses in sexual reproduction onset and growth of chara braunii gmelin to light level and temperature evidence from a greenhouse experiment |
| topic | Chara sexual reproduction light temperature gametangia |
| url | https://www.tandfonline.com/doi/10.1080/02705060.2023.2187468 |
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