Evidence for the Translocation of Gibberellin A_3 and Gibberellin-Like Substances in Grafts between Normal, Dwarf_1 and Dwarf_5 Seedlings of Zea mays L.

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概要

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• Approach grafts were made between the cut surfaces of mesocotyls from normal and dwarf seedlings of Zea mays L. (maize). The dwarfs were the non-allelic single gene gibberellin mutants, dwarf_1 and dwarf_5. The graft combinations were normal-normal, normal-dwarf_1, normal-dwarf_5, dwarf_1-dwarf_1, dwarf_5-dwarf_5, and dwarf_1-dwarf_5. The grafts were used to demonstrate the movement of gibberellin-like substances across the union. GA_3, added to one member of the graft, resulted in leaf-sheath elongation to both members. Gibberellin-Iike elongation was observed in the dwarf_1 and dwarf_5 members of normal-dwarf_1 and normal-dwarf_5 grafts. Also, in some cases, elongation was observed in the dwarf_1 and dwarf_5 members of dwarf_1-dwarf_5 grafts, especially in the dwarf_5 members. The results are discussed in terms of: the gibberellin biosynthetic pathway in maize, the control of this pathway by the d_5 and d_1 mutant genes, and the movement of gibberellin-like substances in the plant. Anatomical observation of grafted seedlings after the resonse was observed shows that callus cells developed and bridged across the interface of the autografts. There was also evidence for vascular differentiation across the graft union.

• 日本植物生理学会の論文

著者

• Phinney B.o.

  Department Of Biology University Of California

• Katsumi M.

  Biology Department, International Christian University

• Foard D.E.

  Department of Botany and Plant Pathology, Purdue University

• Foard D.e.

  Department Of Botany And Plant Pathology Purdue University

関連論文

• Evidence for the Translocation of Gibberellin A_3 and Gibberellin-Like Substances in Grafts between Normal, Dwarf_1 and Dwarf_5 Seedlings of Zea mays L.

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