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Internode length in Pisum . Comparison of genotypes in the light and dark
Author(s) -
Reid James B.
Publication year - 1988
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/j.1399-3054.1988.tb04945.x
Subject(s) - gibberellin , elongation , white light , locus (genetics) , pisum , biology , botany , light sensitivity , gene , red light , darkness , allele , horticulture , genetics , physics , optics , materials science , metallurgy , ultimate tensile strength
There is a strong relationship across the full range of gibberellin deficient, internode length genotypes ( le, lh, is, na ) between internode length in the dark and in red or white light. Further, the new, more severe allele at the le locus. Ie d , is shown to influence growth in the dark as well as in the light. These results suggest that darkeness does not specifically overcome any of the steps blocked by the gibberellin (GA) synthesis genes contrasting with the conclusions drawn by other workers. Supporting this conclusion in relation to the Ie gene are results which show that, at least at certain dosage rates, dark‐grown Ie na plants respond better to GA 1 than to GA 20 similar to the response previously reported in light grown plants. The greater response by plants of the nana line NGB1766 ( na ) to GA 1 in the dark than in the light suggests that light may influence internode length by altering GA‐sensitivity. These results are discussed in relation to previous views on the control of stem elongation by light.