Promotion of asparagus shoot and root growth by growth retardants |
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Authors: | Alisa Khunachak Chee-Kok Chin Trang Le Tom Gianfagna |
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Affiliation: | (1) Department of Horticulture and Forestry, Rutgers University, Cook College, Blake Hall, P.O. Box 231, 08903 New Brunswick, NJ, USA |
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Abstract: | Plantlets regenerated from shoot-tip culture of Asparagus officinalis L. possessed weak shoots and roots. Various combinations of auxins and cytokinins did not improve the plantlets. Incorporation of a number of growth retardants, viz. ancymidol, B-995, phosfon, Amo 1618, cycocel and paclobutrazol, promoted growth of stronger shoots and roots. The effectiveness of the growth retardants varied, with ancymidol being most effective and cycocel least effective.The response to ancymidol was prevented by exogenous GA3 and GA4/7. GA1/3 and GA4/7-like activities were detected in asparagus shoot-tip culture and these activities were reduced by the presence of the growth retardants ancymidol, Amo-1618, and cycocel. |
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Keywords: | asparagus growth retardants gibberellins ancymidol |
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