Epidermal jasmonate perception is sufficient for all aspects of jasmonate‐mediated male fertility in Arabidopsis

Journal Article · Thu Mar 03 00:00:00 EST 2016 · The Plant Journal

DOI:https://doi.org/10.1111/tpj.13131· OSTI ID:1400952

Jewell, Jeremy B. ^[1]; Browse, John ^[1]

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1. Institute of Biological Chemistry Washington State University Pullman WA 99164‐6340 USA

Summary Jasmonate ( JA ) signaling is essential for several environmental responses and reproductive development in many plant species. In Arabidopsis thaliana , the most obvious phenotype of JA biosynthetic and perception mutants is profound sporophytic male sterility characterized by failure of stamen filament elongation, severe delay of anther dehiscence and pollen inviability. The site of action of JA in the context of reproductive development has been discussed, but the ideas have not been tested experimentally. To this end we used targeted expression of a COI 1‐ YFP transgene in the coi1‐1 mutant background. As COI 1 is an essential component of the JA co‐receptor complex, the null coi1‐1 mutant is male sterile due to lack of JA perception. We show that expression of COI 1‐ YFP in the epidermis of the stamen filament and anther in coi1 mutant plants is sufficient to rescue filament elongation, anther dehiscence and pollen viability. In contrast, filament expression alone or expression in the tapetum do not restore dehiscence and pollen viability. These results demonstrate that epidermal JA perception is sufficient for anther function and pollen viability, and suggest the presence of a JA ‐dependent non‐autonomous signal produced in the anther epidermis to synchronize both anther dehiscence and pollen maturation.

• Sponsoring Organization: USDOE
• Grant/Contract Number: DE‐FG02‐99ER20323
• OSTI ID: 1400952
• Journal Information: The Plant Journal, Journal Name: The Plant Journal Vol. 85 Journal Issue: 5; ISSN 0960-7412
• Publisher: Wiley-Blackwell
• Country of Publication: United Kingdom
• Language: English