期刊
PLANTS-BASEL
卷 10, 期 7, 页码 -出版社
MDPI
DOI: 10.3390/plants10071282
关键词
plant UV tolerance; piceid; resveratrol; stilbenes; UV-B irradiation
资金
- Russian Foundation or Basic Research [19-316-90004]
The study found that the application of trans-resveratrol and trans-piceid can enhance Arabidopsis thaliana plants' tolerance to UV-B, increasing leaf survival rates. This improvement in tolerance is more effective than using precursors but slightly less effective than using a UV-B absorber. Furthermore, trans-resveratrol also increased the expression of antioxidant and stress-inducible genes.
Excessive ultraviolet B (UV-B) irradiation is one of the most serious threats leading to severe crop production losses. It is known that secondary metabolite biosynthesis plays an important role in plant defense and forms a protective shield against excessive UV-B irradiation. The contents of stilbenes and other plant phenolics are known to sharply increase after UV-B irradiation, but there is little direct evidence for the involvement of stilbenes and other plant phenolics in plant UV-B protection. This study showed that foliar application of trans-resveratrol (1 and 5 mM) and trans-piceid (5 mM) considerably increased tolerance to a shock of UV-B (10 min at 1800 mu W cm(-2) of irradiation intensity) of four-week-old Arabidopsis thaliana plants that are naturally incapable of stilbene production. Application of trans-resveratrol and trans-piceid increased the leaf survival rates by 1-2%. This stilbene-induced improvement in UV-B tolerance was higher than after foliar application of the stilbene precursors, p-coumaric and trans-cinnamic acids (only 1-3%), but less than that after treatment with octocrylene (19-24%), a widely used UV-B absorber. Plant treatment with trans-resveratrol increased expression of antioxidant and stress-inducible genes in A. thaliana plants and decreased expression of DNA repair genes. This study directly demonstrates an important positive role of stilbenes in plant tolerance to excessive UV-B irradiation, and offers a new approach for plant UV-B protection.
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。
推荐
暂无数据