Effects of abscisic acid on ethylene biosynthesis and perception in Hibiscus rosa-sinensis L. flower development
Articolo
Data di Pubblicazione:
2011
Citazione:
Effects of abscisic acid on ethylene biosynthesis and perception in Hibiscus rosa-sinensis L. flower development / A. Trivellini, A. Ferrante, P. Vernieri, G. Serra. - In: JOURNAL OF EXPERIMENTAL BOTANY. - ISSN 0022-0957. - 62:15(2011), pp. 5437-5452. [10.1093/jxb/err218]
Abstract:
The effect of the complex relationship between ethylene and abscisic acid (ABA) on flower development and
senescence in Hibiscus rosa-sinensis L. was investigated. Ethylene biosynthetic (HrsACS and HrsACO) and receptor
(HrsETR and HrsERS) genes were isolated and their expression evaluated in three different floral tissues (petals,
style–stigma plus stamens, and ovaries) of detached buds and open flowers. This was achieved through treatment
with 0.1 mM 1-aminocyclopropane-1-carboxylic acid (ACC) solution, 500 nl l21 methylcyclopropene (1-MCP), and
0.1 mM ABA solution. Treatment with ACC and 1-MCP confirmed that flower senescence in hibiscus is ethylene
dependent, and treatment with exogenous ABA suggested that ABA may play a role in this process. The 1-MCP
impeded petal in-rolling and decreased ABA content in detached open flowers after 9 h. This was preceded by an
earlier and sequential increase in ABA content in 1-MCP-treated petals and style–stigma plus stamens between 1 h
and 6 h. ACC treatment markedly accelerated flower senescence and increased ethylene production after 6 h and
9 h, particularly in style–stigma plus stamens. Ethylene evolution was positively correlated in these floral tissues
with the induction of the gene expression of ethylene biosynthetic and receptor genes. Finally, ABA negatively
affected the ethylene biosynthetic pathway and tissue sensitivity in all flower tissues. Transcript abundance of
HrsACS, HrsACO, HrsETR, and HrsERS was reduced by exogenous ABA treatment. This research underlines the
regulatory effect of ABA on the ethylene biosynthetic and perception machinery at a physiological and molecular
level when inhibitors or promoters of senescence are exogenously applied.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
Abscisic acid content ; ACO ; ACS ; ERS ; ethylene production ; ETR ; floral tissue ; flower senescence
Elenco autori:
A. Trivellini, A. Ferrante, P. Vernieri, G. Serra
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