Growth and gibberellin relations of the extreme dwarf <i>d</i><sup>x</sup> tomato mutant
U. K. NadhzimovPermanent address of Dr U. K. Nadzhimov, Dept of Biology, Tashkent State Univ. Tashkent – 70049, USSRS JupeDept of Botany and Microbiology, Univ. College of Wales, Aberystwyth, Dyfed, SY23 3DA. UKM. G. K. JonesDept of Biochemistry, Univ. College of Wales, Aberystwyth, Dyfed, SY23 3DA. UKIan M. ScottDept of Botany and Microbiology, Univ. College of Wales, Aberystwyth, Dyfed, SY23 3DA. UK
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The extreme dwarf d x tomato ( Lycopersicon esculentum Mill.) mutant has very short internodes which were found to contain shorter and fewer epidermal cells. The leaves are highly abnormal. The mutant showed a substantial stem growth response to GA 3 , without approaching normal stature or morphology. The active gibberellin GA 1 and its precursors GA 19 and GA 20 were identified by coupled gas chromatography‐mass spectrometry (GC/MS) in d x shoots. Quantitative GC/MS revealed that GA 20 accumulated to far higher levels than normal in stems and leaves of the mutant.
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