Arabidopsis ADC genes involved in polyamine biosynthesis are essential for seed development |
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| Authors: | Urano Kaoru Hobo Tokunori Shinozaki Kazuo |
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| Institution: | Laboratory of Plant Molecular Biology, RIKEN Tsukuba Institute, Tsukuba, Ibaraki 350-0074, Japan. |
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| Abstract: | Arginine decarboxylase (ADC) is a rate-limiting enzyme that catalyzes the first step of polyamine (PA) biosynthesis in Arabidopsis thaliana. We generated a double mutant deficient in Arabidopsis two ADC genes (ADC1-/- ADC2-/-) and examined their roles in seed development. None of the F2 seedlings from crosses of adc1-1 and adc2-2 had the ADC1-/- ADC2-/- genotype. In addition, some abnormal seeds were observed among the ADC1+/- ADC2-/- and ADC1-/- ADC2+/- siliques. Viable offspring with the ADC1-/- ADC2-/- genotype could not be obtained from the ADC1+/- ADC2-/- and ADC1-/- ADC2+/- plants. These results indicate that AtADC genes are required for production of polyamines that are essential for normal seed development in Arabidopsis. |
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| Keywords: | PAs polyamines Put putrescine Spd spermidine Spm spermine ADC arginine decarboxylase ODC ornithine decarboxylase SPDS spermidine synthase SPMS spermine synthase |
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