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Effects of atmospheric CO2 enrichment and root restriction on leaf gas exchange and growth of banana (Musa)

Citation

Schaffer, B and Searle, C and Whiley, AW and Nissen, R, Effects of atmospheric CO2 enrichment and root restriction on leaf gas exchange and growth of banana (Musa), Physiologia Plantarum, 97, (4) pp. 685-693. ISSN 0031-9317 (1996) [Refereed Article]

Copyright Statement

Copyright 1996 Physiologia Plantarum

DOI: doi:10.1111/j.1399-3054.1996.tb00532.x

Abstract

The effects of atmospheric CO2 enrichment and root restriction on photosynthetic characteristics and growth of banana (Musa sp. AAA cv. Gros Michel) plants were investigated. Plants were grown aeroponically in root chambers in controlled environment glasshouse rooms at CO2 concentrations of 350 or 1000 μmol CO2 mol-1. At each CO2 concentration, plants were grown in large (2001) root chambers that did not restrict root growth or in small (201) root chambers that restricted root growth. Plants grown at 350 μmol CO2 mol-1, generally had a higher carboxylation efficiency than plants grown at 1000 μmol CO2 mol-1, although actual net CO2 assimilation (A) was higher at the higher ambient CO2 concentration due to increased intercellular CO2 concentrations (Ci) resulting from CO2 enrichment. Thus, plants grown at 1000 μMol CO2 mol-1 accumulated more leaf area and dry weight than plants grown at 350 μmol CO2 mol-1. Plants grown in the large root chambers were more photosynthetically efficient than plants grown in the small root chambers. At 350 μmol CO2 mol-1, leaf area and dry weights of plant organs were generally greater for plants in the large root chambers compared to those in the small root chambers. Atmospheric CO2 enrichment may have compensated for the effects of root restriction on plant growth since at 1000 μmol CO2 mol-1 there was generally no effect of root chamber size on plant dry weight.

Item Details

Item Type:Refereed Article
Keywords:atmospheric CO2, banana, internal CO2 concentration. Musa, net CO2 assimilation, photosynthesis, root restriction
Research Division:Agricultural and Veterinary Sciences
Research Group:Horticultural Production
Research Field:Horticultural Crop Growth and Development
Objective Division:Plant Production and Plant Primary Products
Objective Group:Horticultural Crops
Objective Field:Horticultural Crops not elsewhere classified
Author:Nissen, R (Mr Robert Nissen)
ID Code:112206
Year Published:1996
Web of Science® Times Cited:12
Deposited By:Tasmanian Institute of Agriculture
Deposited On:2016-10-30
Last Modified:2017-05-02
Downloads:0

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