Work

CO2-Enhanced Yield and Foliar Deformation among Tomato Genotypes in Elevated CO2 Environments

Year: 1991

Type: article

Abstract: Yield increases observed among eight genotypes of tomato (Lycopersicon esculentum Mill.) grown at ambient CO(2) (about 350) or 1000 microliters per liter CO(2) were not due to carbon exchange rate increases. Yield varied among genotypes while carbon exchange rate did not. Yield increases were due to a change in partitioning from root to fruit. Tomatoes grown with CO(2) enrichment exhibited nonepinastic foliar deformation similar to nutrient deficiency symptoms. Foliar deformation varied among genotypes, increased throughout the season, and became most severe at elevated CO(2). Foliar deformation was positively related to fruit yield. Foliage from the lower canopy was sampled throughout the growing season and analysed for starch, K, P, Ca, Mg, Fe, and Mn concentrations. Foliar K and Mn concentrations were the only elements correlated with deformation severity. Foliar K decreased while deformation increased. In another study, foliage of half the plants of one genotype received foliar applications of 7 millimolar KH(2)PO(4). Untreated foliage showed significantly greater deformation than treated foliage. Reduced foliar K concentration may cause CO(2)-enhanced foliar deformation. Reduced K may occur following decreased nutrient uptake resulting from reduced root mass due to the change in partitioning from root to fruit.

Source: PLANT PHYSIOLOGY

DOI: 10.1104/pp.96.3.713

Authors: Kim E. Tripp, Mary M. Peet, D. Mason Pharr, Daniel H. Willits, Paul V. Nelson

Institution: North Carolina State University

Language: English

Topic: Plant responses to elevated CO2

Subfield: Plant Science

Field: Agricultural and Biological Sciences

Domain: Life Sciences

SDG: Zero hunger

Open Access status: green

Funder: Agricultural Research Service