02034nam a2200349Ia 4500 MX-MdCICY 20260521091405.0 CICY B-13940 The phenotype of soluble starch synthase IV defective mutants of Arabidopsis thaliana suggests a novel function of elongation enzymes in the control of starch granule formation The Plant Journal, 49(3), p.942-504, 2007 All plants and green algae synthesize starch through the action of the same five classes of elongation enzymes: the starch synthases. Arabidopsis mutants defective for the synthesis of the soluble starch synthase IV (SSIV)type of elongation enzyme have now been characterized. The mutant plants displayed a severe growth defect but nonetheless accumulated near to normal levels of polysaccharide storage. Detailed structural analysis has failed to yield any change in starch granule structure. However, the number of granules per plastid has dramatically decreased leading to a large increase in their size. These results, which distinguish the SSIV mutants from all other mutants reported to date, suggest a specific function of this enzyme class in the control of granule numbers. We speculate therefore that SSIV could be selectively involved in the priming of starch granule formation. STARCH SYNTHASE STARCH GRANULE STARCH GRANULE INITIATION AMYLOPECTIN ARABIDOPSIS KNOCK-OUT MUTANT. Roldán, I. Wattebled, F. Lucas, M. M. Delvalle, D. Planchot, V. Jiménez, S. Pérez, R. Pérez, R. D'Huls, C. Mérida, Á. https://drive.google.com/file/d/1kIfwDQCQ_vJHZZJr6bX0e49A6DAAluTt/view?usp=drivesdk Para ver el documento ingresa a Google con tu cuenta: @cicy.edu.mx Loc REF1 250602s9999 xx |||||s2 |||| ||und|d 24076 24076 0 0 Loc 0 0 F1 CICY CICY RE 2025-06-25 0 B-13940 2025-06-25 15:39:32 2025-06-25 REF1