Endogenous jasmonates in dry and imbibed sunflower seeds from plants grown at different soil moisture contents

In this study, we characterized two sunflower (Helianthus annuus L.) lines with differential sensitivity to drought, the sensitive line B59 and the tolerant line B71. Using both lines, we compared the content of endogenous jasmonates (JAs) in dry and imbibed seeds from plants grown under irrigation...

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Bibliographic Details
Published in:Seed science research 2007-06, Vol.17 (2), p.91-98
Main Authors: Vigliocco, Ana, Alemano, Sergio, Miersch, Otto, Alvarez, Daniel, Abdala, Guillermina
Format: Article
Language:English
Subjects:
chemical constituents of plants
Drought
Environmental conditions
germination
Helianthus annuus
imbibition
irrigated conditions
jasmonates
jasmonic acid
metabolites
Moisture content
seed germination
Seeds
Soil moisture
soil water content
sunflower
water content
water stress
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Summary:In this study, we characterized two sunflower (Helianthus annuus L.) lines with differential sensitivity to drought, the sensitive line B59 and the tolerant line B71. Using both lines, we compared the content of endogenous jasmonates (JAs) in dry and imbibed seeds from plants grown under irrigation and drought. Jasmonic acid (JA), 12-oxo-phytodienoic acid (OPDA), 11-hydroxyjasmonate (11-OH-JA) and 12-hydroxyjasmonate (12-OH-JA) were detected in dry and imbibed sunflower seeds. Seeds from plants grown under drought had a lower content of total JAs and exhibited higher germination percentages than seeds from irrigated plants, demonstrating that environmental conditions have a strong influence on the progeny. OPDA and 12-OH-JA were the main compounds found in dry seeds of both lines. Imbibed seeds showed an enhanced amount of total JAs with respect to dry seeds produced by plants grown in both soil moisture conditions. Imbibition triggered a dramatic OPDA increase in the embryo, suggesting a role of this compound in germination. We conclude that JAs patterns vary during sunflower germination and that the environmental conditions experienced by the mother plant modify the hormonal content of the seed progeny.
ISSN:0960-2585
1475-2735
DOI:10.1017/S0960258507708371