Low temperature effects on grapevine photosynthesis: the role of inorganic phosphate

Functional Plant Biology : FPB
Luke HendricksonRobert T Furbank

Abstract

The photosynthetic response of grapevine leaves (Vitis vinifera L. cv. Riesling) to low temperature was studied to determine the role of end-product limitation and orthophosphate (Pi) recycling to the chloroplast under these conditions. As reported previously, the response of photosynthesis in air to stomatal conductance declined at temperatures below 15°C, suggesting that at low temperatures inhibition of photosynthesis in grapevine has a strong non-stomatal component. Stimulation of carbon assimilation at ambient CO2 by reducing O2 from 21 to 2 kPa, O2 declined to zero below 15°C, a phenomenon often associated with a restriction in photosynthesis due to end-product-synthesis limitation. This stimulation could be restored by feeding Pi. Photosynthesis in leaf disks at both high and low irradiances in non-photorespiratory conditions (1% CO2) was highly sensitive to reductions in temperature. Below 15°C, feeding Pi caused a large stimulation of photosynthetic O2 evolution. Metabolite measurements indicated that despite a decline in Rubisco carbamylation state, ribulose 1,5-bisphosphate (RuBP) levels dropped at low temperature and the ratio of 3-phosphoglycerate (3-PGA) to triose phosphate (TP) remained largely unchanged. These r...Continue Reading

References

Nov 9, 2000·Proceedings of the National Academy of Sciences of the United States of America·S J Crafts-Brandner, M E Salvucci
Jul 4, 2001·Journal of Experimental Botany·A J PietersD W Lawlor
Jul 18, 2001·Journal of Experimental Botany·M J Paul, C H Foyer
Jul 1, 2003·Functional Plant Biology : FPB·Luke HendricksonWah Soon Chow
Apr 1, 2002·Functional Plant Biology : FPB·João P MarocoM Manuela Chaves

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Citations

Jan 10, 2008·Plant, Cell & Environment·David S Kubien, Rowan F Sage
Jun 6, 2008·Plant, Cell & Environment·Danielle A Way, Rowan F Sage
Apr 26, 2008·Journal of Experimental Botany·Rowan F SageDavid S Kubien
Dec 21, 2005·Journal of Experimental Botany·Rowan F Sage, Athena D McKown
Jul 31, 2007·Plant, Cell & Environment·Rowan F Sage, David S Kubien

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