4.7 Article

Different Waterlogging Depths Affect Spatial Distribution of Fine Root Growth for Pinus thunbergii Seedlings

期刊

FRONTIERS IN PLANT SCIENCE
卷 12, 期 -, 页码 -

出版社

FRONTIERS MEDIA SA
DOI: 10.3389/fpls.2021.614764

关键词

fine root growth distribution; fine root morphology; fine root color; in-growth core; coastal forest restoration

资金

  1. Japan Society for the Promotion of Science [18J20542]
  2. Forestry and Forest Products Research Institute Establishment of guidelines for afforestation of coastal forests on berms that have the merits of high resistance to tsunami from 2017 to 2019 [201701]
  3. Grants-in-Aid for Scientific Research [18J20542] Funding Source: KAKEN

向作者/读者索取更多资源

This study found that under full waterlogging conditions, both fine root growth and transpiration of Pinus thunbergii significantly decreased, while under partial waterlogging conditions, fine root growth increased significantly in the non-waterlogged top soil. After 8 weeks of waterlogging, transpiration recovered to no significant difference compared to the control group, mainly attributed to the increase in fine root growth in the non-waterlogged top soil.
The increase of waterlogged environments at forests and urban greenery is of recent concern with the progress of climate change. Under waterlogging, plant roots are exposed to hypoxic conditions, which strongly affect root growth and function. However, its impact is dependent on various factors, such as waterlogging depth. Therefore, our objective is to elucidate effects of different waterlogging depths on Pinus thunbergii Parl., which is widely used for afforestation, especially at coastal forests. We conducted an experiment to examine growth and morphology of fine roots and transpiration using 2-year-old seedlings under three treatments, (1) control (no waterlogging), (2) partial waterlogging (partial-WL, waterlogging depth = 15 cm from the bottom), and (3) full waterlogging (full-WL, waterlogging depth = from the bottom to the soil surface, 26 cm). As a result, fine root growth and transpiration were both significantly decreased at full-WL. However, for partial-WL, fine root growth was significantly increased compared to control and full-WL at the top soil, where it was not waterlogged. Additionally, transpiration which had decreased after 4 weeks of waterlogging showed no significant difference compared to control after 8 weeks of waterlogging. This recovery is to be attributed to the increase in fine root growth at non-waterlogged top soil, which compensated for the damaged roots at the waterlogged bottom soil. In conclusion, this study suggests that P. thunbergii is sensitive to waterlogging; however, it can adapt to waterlogging by plastically changing the distribution of fine root growth.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.7
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据