Effects of ethylene and gibberellic acid on cellular growth and development in apical and subapical regions of etiolated pea seedling

Subhook swelling of 4-day-old etiolated pea seedlings (var. Alaska), caused by 0.5 microliter per liter ethylene, was prevented by preincubation and continued growth in 0.1 mM gibberellic acid (GA). The subhook region exhibited normal elongation and cell size and volume. However, inhibition of elong...

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Published inPlant physiology (Bethesda) Vol. 54; no. 1; pp. 1 - 5
Main Authors Stewart, R.N, Lieberman, M, Kunishi, A.T
Format Journal Article
LanguageEnglish
Published United States American Society of Plant Physiologists 01.07.1974
Subjects
Apical meristems
Cell division
Cell growth
Elbow
Gibberellins
horticultural crops
Inks
Metaphase
Peas
plant biochemistry
plant physiology
Seedlings
Swelling
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Summary:Subhook swelling of 4-day-old etiolated pea seedlings (var. Alaska), caused by 0.5 microliter per liter ethylene, was prevented by preincubation and continued growth in 0.1 mM gibberellic acid (GA). The subhook region exhibited normal elongation and cell size and volume. However, inhibition of elongation and cessation of cell division caused by 0.5 microliter per liter ethylene in the apical hook region of the etiolated pea stem were not overcome by GA. Most of the arrested cells were in G2. These data suggest a possible interaction of GA and ethylene in cell enlargement in the subhook region of the etiolated pea seedlings. They also suggest a different mode of action by ethylene in the apical hook region where the ethylene effect was not counteracted by GA.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:0032-0889
1532-2548
DOI:10.1104/pp.54.1.1