4.7 Article

A meta-analysis of the interactive effects of UV and drought on plants

期刊

PLANT CELL AND ENVIRONMENT
卷 45, 期 1, 页码 41-54

出版社

WILEY
DOI: 10.1111/pce.14221

关键词

additive effect; cross-resistance; stress; synergistic effect

资金

  1. Ministerstvo Skolstvi, Mladeze a Telovychovy [CZ.02.1.01/0.0/0.0/16_019/0000797]
  2. Science Foundation Ireland [16/IA/4418]
  3. Science Foundation Ireland (SFI) [16/IA/4418] Funding Source: Science Foundation Ireland (SFI)

向作者/读者索取更多资源

Interactions between climate change and UV penetration in the biosphere are causing plants to be exposed to new combinations of UV radiation and drought, with potential additive, synergistic, or antagonistic impacts. Lack of understanding of the impacts of combined treatments creates uncertainties that hinder predictions of future ecological change. In plants exposed to both UV and drought, the defense responses appear to be less-than-additive, indicating possible cross-resistance mechanisms. Increases in drought exposure in future climates may be mitigated by naturally high UV regimes.
Interactions between climate change and UV penetration in the biosphere are resulting in the exposure of plants to new combinations of UV radiation and drought. In theory, the impacts of combinations of UV and drought may be additive, synergistic or antagonistic. Lack of understanding of the impacts of combined treatments creates substantial uncertainties that hamper predictions of future ecological change. Here, we compiled information from 52 publications and analysed the relative impacts of UV and/or drought. Both UV and drought have substantial negative effects on biomass accumulation, plant height, photosynthesis, leaf area and stomatal conductance and transpiration, while increasing stress-associated symptoms such as MDA accumulation and reactive-oxygen-species content. Contents of proline, flavonoids, antioxidants and anthocyanins, associated with plant acclimation, are upregulated both under enhanced UV and drought. In plants exposed to both UV and drought, increases in plant defense responses are less-than-additive, and so are the damage and growth retardation. Less-than-additive effects were observed across field, glasshouse and growth-chamber studies, indicating similar physiological response mechanisms. Induction of a degree of cross-resistance seems the most likely interpretation of the observed less-than-additive responses. The data show that in future climates, the impacts of increases in drought exposure may be lessened by naturally high UV regimes.

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