PMID: 9418046Jan 7, 1998Paper

Expression of a luteoviral movement protein in transgenic plants leads to carbohydrate accumulation and reduced photosynthetic capacity in source leaves

The Plant Journal : for Cell and Molecular Biology
K HerbersU Sonnewald

Abstract

Elucidating the role of viral genes in transgenic plants revealed that the movement protein (MP) from tobacco mosaic virus is responsible for altered carbohydrate allocation in tobacco and potato plants. To study whether this is a general feature of viral MPs, the movement protein MP17 of potato leafroll virus (PLRV), a phloem-restricted luteovirus, was constitutively expressed in tobacco plants. Transgenic lines were strongly reduced in height and developed bleached and sometimes even necrotic areas on their source leaves. Levels of soluble sugars and starch were significantly increased in source leaves. Yet, in leaf laminae the hexose-phosphate content was unaltered and ATP reduced to only a small extent, indicating that these leaves were able to maintain homeostatic conditions by compartmentalization of soluble sugars, probably in the vacuole. On the contrary, midribs contained lower levels of soluble sugars, ATP, hexose-phosphates and UDP-glucose supporting the concept of limited uptake and catabolism of sucrose in the phloem. The accumulation of carbohydrates led to a decreased photosynthetic capacity and carboxylation efficiency of ribulose-1,5-bisphosphate carboxylase/oxygenase (rubisco) probably owing to decreased expre...Continue Reading

Citations

Mar 6, 1999·Current Opinion in Plant Biology·S Smeekens
Jun 22, 1999·Current Opinion in Plant Biology·W J Lucas, S Wolf
Jan 1, 2000·Molecular Plant Pathology·A J MauleM A Aranda
Aug 29, 2007·Molecular Plant-microbe Interactions : MPMI·Christopher Dardick
May 16, 2002·Plant Physiology·Sandra M J LangeveldSylvia de Pater
Apr 10, 2007·Annual Review of Phytopathology·James N Culver, Meenu S Padmanabhan
Apr 17, 2003·Proceedings of the National Academy of Sciences of the United States of America·Christoph RudolphJoachim F Uhrig
Oct 2, 2015·Archives of Virology·Abdelaleim Ismail ElSayedDennis C Odero
Nov 18, 2003·The Plant Journal : for Cell and Molecular Biology·Isabel MurilloBlanca San Segundo
May 9, 2014·Plant, Cell & Environment·Antonietta SantanielloPierdomenico Perata
Sep 9, 2011·The Journal of General Virology·Vicente Pallas, Juan Antonio García
Jan 27, 2015·Current Opinion in Virology·Juan Antonio García, Vicente Pallás
Oct 12, 2004·Plant Physiology and Biochemistry : PPB·Ken KobayashiAlejandro Mentaberry
Dec 22, 2005·Journal of Plant Physiology·Sophia Biemelt, Uwe Sonnewald
Nov 13, 2019·Molecular Plant-microbe Interactions : MPMI·Brandon C Reagan, Tessa M Burch-Smith
Sep 1, 2007·Journal of Experimental Botany·C EspinozaP Arce-Johnson

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