Path and Correlation Analyses of the Factors affecting Biomass Production of Brassica Cultivars under Phosphorus-Deficiency Stress Environment
2007
Akhtar, M.S. | Oki, Y. | Adachi, T.
Path analysis is a statistical technique that partitions correlations into direct and indirect effects and distinguishes between correlation and causation, whereas correlation in general measures the extent and direction (positive or negative) of a relationship occurring between two or more variables. The estimates of correlation and path coefficients can help us to understand the role and relative contribution of various plant traits in establishing growth behavior of crop cultivars under given environmental conditions. Dependence of shoot dry-matter (SDM) production of six hydroponically grown Brassica cultivars on various growth parameters and characteristics of P metabolism was investigated using the modified Johnson's nutrient solution to maintain deficient (10 micromolar) and adequate (200 micromolar) P levels. Root dry-matter (RDM), total dry-matter, P content in shoot, and P-utilization efficiency (PUE) had significant and positive effects on production of SDM in a P-deficient environment. Root-shoot ratio (RSR), however, negatively affected SDM of cultivars exposed to P-deficient conditions and did not show any impact on SDM production in either of the two treatments.
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