| Ding Yuanyuan,Bian Yao,Wang Huina,Liu Jing,Li Jingrui,Wang Hongwei. 2020. Early development, life history and ecological habits of Grateloupia constricata Li et Ding. Acta Oceanologica Sinica, 39(10):155－161 |
| Early development, life history and ecological habits of Grateloupia constricata Li et Ding |
| 缢基蜈蚣藻的早期发育、生活史和生态习性 |
| Received:August 23, 2019 |
| DOI：10.1007/s13131-020-1662-5 |
| Key words:carpospore life history alternation of generations temperature irradiance photoperiod |
| 中文关键词: 孢子 生活史 世代交替 温度 光照强度 光周期 |
| 基金项目: |
| Author Name | Affiliation | E-mail | | Ding Yuanyuan | College of Life Sciences, Liaoning Normal University, Dalian 116000, China | | | Bian Yao | College of Life Sciences, Liaoning Normal University, Dalian 116000, China | | | Wang Huina | College of Life Sciences, Liaoning Normal University, Dalian 116000, China | | | Liu Jing | College of Life Sciences, Liaoning Normal University, Dalian 116000, China | | | Li Jingrui | College of Life Sciences, Liaoning Normal University, Dalian 116000, China | | | Wang Hongwei | College of Life Sciences, Liaoning Normal University, Dalian 116000, China | kitamiwang@163.com |
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| Abstract: |
| As the largest genus of Halymeniaceae, Grateloupia has been widely reported. Here, we observed the life history and early development of Grateloupia constricata Li et Ding and investigated the effects of temperature, irradiance, and photoperiod on the discoid crust and sporeling development of G. constricata under laboratory conditions. We observed that the type of carpospore development was “mediate discal type”. The life history included homotypic gametophyte (haploid), carposporophyte (diploid), and tetrasporophyte (diploid), with typical isomorphic alternation of generations. The results of double factorial analysis showed that both single factorial effects and interaction among temperature, photoperiod, and irradiance were obviously significant on the discoid crust and sporeling development. Furthermore, we found that the optimum combination of condition for the early growth and development of G. constricata was temperature 20℃, irradiance 80 μmol photons/(m2·s) and photoperiod 16L:8D. This study provides the theoretical basis and technical support for the conservation of the Grateloupia germplasm, artificial breeding, large-scale cultivation and sustainable development. |
| 中文摘要: |
| 蜈蚣藻属是海膜科中最大的属。在实验室培养条件下,我们详细观察了缢基蜈蚣藻（Grateloupia constricata）早期发育过程及生活史，研究了温度与光周期、温度与光照强度的交互作用对其盘状体发育及幼苗生长的影响。结果表明：缢基蜈蚣藻孢子发育类型为“间接盘状体”类型；缢基蜈蚣藻生活史由单倍体的雌、雄配子体，二倍体的果孢子体和四分孢子体组成，为典型的同型世代交替；温度、光周期和光照强度及其之间的相互作用对盘状体和幼苗的发育有显著影响，其中由温度与光周期、温度与光照强度交互实验得出：缢基蜈蚣藻早期发育的最适条件为温度20℃、光照强度80 μmol photons/(m2·s) 和光周期16L:8D。本研究为缢基蜈蚣藻的种质保存、大规模栽培和可持续开发利用提供了理论依据和技术支持。 |
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