The DOI matches its Crossref record; 55 of the 55 references it cites were found in a registry or an index.
Endogenous salicylic acid protects rice plants from oxidative damage caused by aging as well as biotic and abiotic stress
Abstract
Summary: Salicylic acid (SA) is a key endogenous signal that mediates defense gene expression and disease resistance in many dicotyledonous species. In contrast to tobacco and Arabidopsis, which contain low basal levels of SA, rice has two orders of magnitude higher levels of SA and appears to be insensitive to exogenous SA treatment. To determine the role of SA in rice plants, we have generated SA‐deficient transgenic rice by expressing the bacterial salicylate hydroxylase that degrades SA. Depletion of high levels of endogenous SA in transgenic rice does not measurably affect defense gene expression, but reduces the plant's capacity to detoxify reactive oxygen intermediates (ROI). SA‐deficient transgenic rice contains elevated levels of superoxide and H 2 O 2, and exhibits spontaneous lesion formation in an age‐ and light‐dependent manner. Exogenous application of SA analog benzothiadiazole complements SA deficiency and suppresses ROI levels and lesion formation. Although an increase of conjugated catechol was detected in SA‐deficient rice, catechol does not appear to significantly affect ROI levels based on the endogenous catechol data and exogenous catechol treatment. When infected with the blast fungus (Magnaporthe grisea), SA‐deficient rice exhibits increased susceptibility to oxidative bursts elicited by avirulent isolates. Furthermore, SA‐deficient rice is hyperresponsive to oxidative damage caused by paraquat treatment. Taken together, our results strongly suggest that SA plays an important role to modulate redox balance and protect rice plants from oxidative stress.
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Cited by
Salicylic acid, a multifaceted hormone to combat disease
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Characterization and Biological Function of the ISOCHORISMATE SYNTHASE2 Gene of Arabidopsis
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Metadata
- Authors
- Yang, Y., Qi, M., & Mei, C.
- Venue
- The Plant Journal
- Publisher
- Wiley
- Published
- 2004-12
- Volume
- 40
- Issue
- 6
- Pages
- 909-919
- ISSN
- 0960-7412 (ISSN-L)
- 1365-313X
- OpenAlex
- W2109152247
- Cited by
- 444
- References
- 55
- FWCI
- 16.12
- Type
- journal article
- Language
- en
- Open access
- closed
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- Yang, Y., Qi, M., & Mei, C. (2004). Endogenous salicylic acid protects rice plants from oxidative damage caused by aging as well as biotic and abiotic stress. The Plant Journal. https://doi.org/10.1111/j.1365-313x.2004.02267.x
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