Journal Article

Involvement of Gibberellins in Expression of a Cysteine Proteinase (SH-EP) in Cotyledons of <i>Vigna mungo</i> Seedlings

Masatoshi Taneyama, Takashi Okamoto, Hisakazu Yamane and Takao Minamikawa

in Plant and Cell Physiology

Published on behalf of Japanese Society of Plant Physiologists

Volume 42, issue 11, pages 1290-1293
Published in print November 2001 | ISSN: 0032-0781
Published online November 2001 | e-ISSN: 1471-9053 | DOI: http://dx.doi.org/10.1093/pcp/pce153
Involvement of Gibberellins in Expression of a Cysteine Proteinase (SH-EP) in Cotyledons of Vigna mungo Seedlings

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The expression of a papain-type proteinase, designated SH-EP, in cotyledons of Vigna mungo seedlings has been shown to require some factors in the embryonic axes. Gibberellin A1 (GA1) and GA20 were identified by GC-MS in embryonic axes of V. mungo seedlings. The level of accumulation of SH-EP in cotyledons of V. mungo seedlings was greatly reduced by treatment of the seeds with uniconazole-P, an inhibitor for GA biosynthesis. The reduced level of accumulation of SH-EP in cotyledons by uniconazole-P was recovered by exogenous application of GA1 and GA20 to the seedlings.

Keywords: Key words: Cysteine proteinase — GC-MS — Gibberellins (identification of GA1 and GA20) — Seed germination — Uniconazole-P.; Abbreviations: GA-like, gibberellin-like; GC-MS, gas chromatography-mass spectrometry; tR, retention time.

Journal Article.  2409 words.  Illustrated.

Subjects: Biochemistry ; Molecular and Cell Biology ; Plant Sciences and Forestry

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