...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Estuarine Coastal and Shelf Science >Photosynthetic and physiological responses of native and exotic tidal woody seedlings to simulated tidal immersion
【24h】

Photosynthetic and physiological responses of native and exotic tidal woody seedlings to simulated tidal immersion

机译：天然和外来潮汐木本植物对模拟潮汐浸入的光合和生理响应

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Hibiscus hamabo, a native tidal woody species, and Myrica cerifera, an exotic tidal woody species, have been widely planted on coastal beaches in subtropical China. However, whether there are differences in physiological response and tolerance to immersion between the two tidal species is still unknown. Our objectives were to evaluate differences in the photosynthetic and physiological responses to tidal immersion for the two species in the context of sea level rise. With increasing immersion, net photosynthesis, stomatal conductance, intercellular CO_2 concentration, and light saturation point declined progressively for both species, whereas dark respiration and light compensation point showed the reverse trend. Lower variation was observed in H. hamabo than in M. cerifera for each index in the same treatment. Photosynthetic ability and utilization of light, especially under high light intensity, decreased for both species. Leaf soluble sugar and protein contents, and glycolate oxidase activity first increased and then decreased with increasing of immersion degree, with the higher values observed in the W4 (4 h duration, 15 cm depth) and W6 (6 h duration, 25 cm depth) treatments for H. hamabo, and W2 (2 h duration, 5 cm depth) and W4 treatments for M. cerifera. These findings indicate that H. hamabo has a better ability to keep the reduction of photosynthesis at a minimum through soluble substance regulated osmotic potential and avoiding excess light damage to the photosynthetic system through increased photorespiration, heat dissipation, chlorophyll fluorescence. Our results suggest that H. hamabo is more tolerant to tidal immersion than M. cerifera, and therefore it is better adapted to the anticipated sea level rise in future.
机译：在中国亚热带的沿海海滩上广泛种植了本地的潮汐木本木槿，木犀草和外来的潮汐木本。但是，两种潮汐物种之间在生理反应和浸入耐受性方面是否存在差异仍然未知。我们的目标是评估在海平面上升的情况下两种物种对潮汐浸入的光合和生理响应的差异。随着浸入的增加，两种物种的净光合作用，气孔导度，细胞间CO_2浓度和光饱和点逐渐降低，而暗呼吸和光补偿点则呈现相反的趋势。在相同处理中，对于每个指数，在H. hamabo中观察到的变化均比在cerifera中的变化小。两种物种的光合能力和光的利用率（特别是在高光照强度下）均降低。叶片的可溶性糖和蛋白质含量以及乙醇酸氧化酶活性随着浸入度的增加而先增加然后降低，在W4（持续时间4 h，深度15 cm）和W6（持续时间6 h，深度25 cm）中观察到较高的值H. hamabo和W2（持续时间2小时，深度5 cm）的处理，以及W4 cerifera的处理。这些发现表明，H。hamabo具有更好的能力，通过可溶物质调节的渗透势将光合作用的降低保持在最低限度，并通过增加光呼吸，散热和叶绿素荧光避免对光合作用系统的过度光害。我们的结果表明，H。hamabo比M. cerifera更能耐潮汐浸泡，因此，它可以更好地适应未来预期的海平面上升。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号