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- Title
Identifying soybean lines differing in gas exchange sensitivity to humidity.
- Authors
BUNCE, JAMES A.
- Abstract
SUMMARY The ratios of root length and root weight to leaf area differed within and between cultivars of soybean. Plants with low ratios of root length or weight to leaf area had leaf conductances and net photosynthetic rates more reduced by a given increase in the leaf to air water vapour pressure difference around a single leaf than plants with high ratios. Plant and root system conductances to water were estimated as transpiration rate per unit leaf area divided by the difference between substrate and leaf water potentials, and by the rate of water flow through pressurised root systems. These conductances were greater in plants with large, as compared with small, root systems per unit leaf area. Cultivar rankings in sensitivity of gas exchange to humidity were consistent in controlled environment chambers and in field tests.
- Publication
Annals of Applied Biology, 1984, Vol 105, Issue 2, p313
- ISSN
0003-4746
- Publication type
Article
- DOI
10.1111/j.1744-7348.1984.tb03055.x