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Influence of the Indoleacetic Acid‐Lysine Synthetase Gene ( iaaL ) of Pseudomonas syringae subsp. savastanoi on Yield Attributes of Potatoes
Author(s) -
Fladung M.
Publication year - 1993
Publication title -
plant breeding
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.583
H-Index - 71
eISSN - 1439-0523
pISSN - 0179-9541
DOI - 10.1111/j.1439-0523.1993.tb00635.x
Subject(s) - biology , pseudomonas syringae , cauliflower mosaic virus , lysine , solanaceae , gene , genetically modified crops , yield (engineering) , botany , horticulture , transgene , amino acid , biochemistry , metallurgy , materials science
The iaaL gene of Pseudomonas syringae subsp. savastanoi encodes an indoleacetic acid‐lysine synthetase which conjugates free indoleacetic acid (IAA) with lysine. lAA‐lys is biologically less active than free IAA. The iaaL coding region was expressed under the control of the cauliflower mosaic virus 35S promoter and transgenic potato plants were produced (S pena et al. 1991). 35S iaaL potato plants are characterized by increased internodal length and epinastic bending of older leaves. In three greenhouse experiments with plants grown in pots of different size and in two growth chamber experiments tuber number increased in iaaL transgenic plants compared to untransformed and vector‐transformed controls of the same genotype. The increase in tuber numbers observed under controlled conditions was reflected in tuber yield which increased in the pot grown transgenics.