A citrus abscission agent induces anoxia- and senescence-related gene expression in Arabidopsis | Zendy

Fernando Alférez | Zendy; Guang Yan Zhong | Zendy; Jacqueline K. Burns | Zendy

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A citrus abscission agent induces anoxia- and senescence-related gene expression in Arabidopsis

Author(s) -

Fernando Alférez,

Guang Yan Zhong,

Jacqueline K. Burns

Publication year - 2007

Publication title -

journal of experimental botany

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.616

H-Index - 242

eISSN - 1460-2431

pISSN - 0022-0957

DOI - 10.1093/jxb/erm111

Subject(s) - senescence , abscission , arabidopsis , transcriptome , chloroplast , biology , microbiology and biotechnology , botany , gene expression , gene , biochemistry , mutant

The mechanisms of negative effects of 5-chloro-3-methyl-4-nitro-1H-pyrazole (CMNP), a pyrazole-derived plant growth regulator used as a citrus abscission agent, were explored in Arabidopsis by integrating transcriptomic, physiological, and ultrastructural analyses. CMNP promoted starch degradation and senescence-related symptoms, such as chloroplast membrane disruption, electrolyte leakage, and decreased chlorophyll and protein content. Symptoms of plant decline were evident 12 h after CMNP treatment. Microarray analysis revealed that CMNP influenced genes associated with stress, including those related to anoxia, senescence, and detoxification. Sucrose treatment arrested CMNP-induced plant decline. The results demonstrate that the plant response to CMNP shares common elements with various stresses and senescence at physiological and molecular levels.

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