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Wound-induced expression of ACC synthase genes in etiolated Mung bean Hypocotyls

Title
Wound-induced expression of ACC synthase genes in etiolated Mung bean Hypocotyls
Authors
Song, JDLee, DHRhew, THLee, CH
Ewha Authors
이동희
SCOPUS Author ID
이동희scopus
Issue Date
2003
Journal Title
JOURNAL OF PLANT BIOLOGY
ISSN
1226-9239JCR Link
Citation
vol. 46, no. 3, pp. 199 - 203
Keywords
ACC synthaseauxinethylenewounding
Publisher
BOTANICAL SOCIETY OF KOREA
Indexed
SCIE; SCOPUS; KCI WOS
Abstract
After wounding the intact tissues of developing etiolated mung bean hypocotyls, we investigated how the expression of all known members of the ACC synthase gene family was effected. Of the seven members, transcripts of only VR-ACS1, VR-ACS6, and VR-ACS7 were detectable in the control (non-stressed) hypocotyls, and their activities were strongly correlated with growth rate. In addition, expression of both VR-ACS1 and VR-ACS6 was stimulated by wounding, reaching a peak after about 1 h and sustaining that effect for about 6 h. This induced response did not occur with 5-d-old seedlings, in which transcripts were not normally detected at that stage. When auxin activity and transport were blocked by co-treatment with two inhibitors, TIBA and PCIB, the expression of those two genes was significantly reduced. However, when seedlings were co-treated before being injured, the effect of wounding was not substantially altered. Our results suggest that expression of these two ACC genes in non-stressed hypocotyls is regulated by the endogenous level of auxin. Likewise, transcripts of those genes are stimulated both by wounding and by treatment with auxin, although the two signal transduction pathways are partially independent.
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일반대학원 > 바이오융합과학과 > Journal papers
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