Ethylene can stimulate Arabidopsis hypocotyl elongation in the light
0106 biological sciences
0301 basic medicine
03 medical and health sciences
01 natural sciences
DOI:
10.1073/pnas.94.6.2756
Publication Date:
2002-07-26T14:43:20Z
AUTHORS (5)
ABSTRACT
Ethylene inhibits hypocotyl elongation in etiolated
Arabidopsis
seedlings. However, when
Arabidopsis
was grown in the light in the presence of ethylene or its precursor 1-aminocyclopropane-1-carboxylic acid (ACC), a marked induction of hypocotyl elongation occurred. This resulted from an increase in cell expansion rather than cell division. The effects of ethylene and ACC were antagonized by the ethylene action inhibitor Ag
+
. The elongation response was absent or weakened in a set of ethylene-insensitive mutants (
etr1-3
,
ein2-1
,
ein3-1
,
ein4
,
ain1-10
,
ein7
). With the exception of
ein4
, the degree of inhibition of hypocotyl elongation was correlated with the strength of the ethylene-insensitive phenotype based on the triple response assay. In addition, the constitutive ethylene response mutant
ctr1-1
, grown in the light, had a longer hypocotyl than the wild type. Exogenous auxin also induced hypocotyl elongation in light-grown
Arabidopsis
. Again, the response was abolished by treatment with Ag
+
, suggesting that ethylene might be a mediator. The results showed that, depending on light conditions, ethylene can induce opposite effects on cell expansion in
Arabidopsis
hypocotyls.
SUPPLEMENTAL MATERIAL
Coming soon ....
REFERENCES (28)
CITATIONS (240)
EXTERNAL LINKS
PlumX Metrics
RECOMMENDATIONS
FAIR ASSESSMENT
Coming soon ....
JUPYTER LAB
Coming soon ....