Plant hormones regulate growth, development, and defense against biotic and abiotic stresses. Salicylic acid (SA), ethylene (ET), and jasmonate (JA) are major phytohormones that control the defense against pathogens. SA and JA primarily regulate resistance against biotrophic and necrotrophic pathogens, respectively. NPR1 is the key regulator of SA signaling in plants. AtOZF1 function has recently been ascribed to promote both NPR1-dependent and -independent SA signaling. However, the role of AtOZF1 in JA signaling was not known. Here we report AtOZF1 as a positive regulator of JA signaling in Arabidopsis. The atozf1 mutants are more susceptible to the necrotrophic pathogen Botrytis cinerea than wildtype (WT) plants. AtOZF1 positively regulates the expression of JA inducible genes like PDF1.2, VSP2, THI2.1, and ORA59. AtOZF1 takes part in SA-JA cross-talk to an extent similar to that of NPR1. AtOZF1 is essential for the activation of PDF1.2 expression upon exogenous methyl-jasmonate (MeJA) application. Intriguingly, SA can significantly promote MeJA-induced PDF1.2 expression in the absence of AtOZF1. Altogether our results reveal a novel SA-JA interaction pathway in plants.

Nidhi Singh

Ashis Kumar Nandi

Journal of Biosciences

《生物科学杂志》是班加罗尔印度科学院出版的季刊。它涵盖生物学的所有领域，是其范围内的国内一流期刊。它在当前目录和其他标准生物和医学数据库中被索引。 《生物科学杂志》始于 1934 年，当时是《印度科学院院刊》（B 部分）。这种情况一直持续到 1978 年，当时它被分为三个部分：PROCEEDINGS-ANIMAL SCIENCES、PROCEEDINGS-PLANT SCIENCES 和 PROCEEDINGS-EXPERIMENTAL BIOLOGY。 1979年PROCEEDINGS-EXPERIMENTAL BIOLOGY更名为JOURNAL OF BIOSCIENCES； 1991 年，PROCEEDINGS-ANIMAL SCIENCES 和 PROCEEDINGS-PLANT SCIENCES 与其合并。

The Journal of Biosciences is a quarterly publication by the Indian Academy of Sciences in Bangalore, covering all areas of biology and recognized as a leading national journal in its field. It is indexed in current directories and other standard biological and medical databases. The journal was established in 1934 as part of the Proceedings of the Indian Academy of Sciences (Section B). In 1978, it was divided into three sections: Proceedings-Animal Sciences, Proceedings-Plant Sciences, and Proceedings-Experimental Biology. In 1979, the Proceedings-Experimental Biology was renamed the Journal of Biosciences; in 1991, the Proceedings-Animal Sciences and Proceedings-Plant Sciences were merged into it.

《生物科学杂志》是由班加罗尔印度科学院出版的季刊，涵盖生物学的所有领域，是该领域内的国内一流期刊。该期刊在当前目录和其他标准生物与医学数据库中被广泛索引。《生物科学杂志》创刊于1934年，最初是《印度科学院院刊》（B部分）。1978年，该期刊分为三个部分：动物科学、植物科学和实验生物学。1979年，实验生物学部分更名为Journal of Biosciences；1991年，动物科学和植物科学部分与其合并。

AtOZF1 positively regulates JA signaling and SA-JA cross-talk in Arabidopsis thaliana

Results reveal a novel SA-JA interaction pathway in plants and reveal AtOZF1 as a positive regulator of JA signaling in Arabidopsis mutants, which are more susceptible to the necrotrophic pathogen Botrytis cinerea than wildtype plants.

Category	Quartile
生物学	4
生物学, 生物学	4

AtOZF1 positively regulates JA signaling and SA-JA cross-talk in Arabidopsis thaliana

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