Table 1.
Mean value, Standard Deviation (SD) of traits investigated under two phosphorus regimes and the Phosphorus Efficiency-Coefficient (PEC) of each trait.
Fig 1.
Frequency distribution of variation for seven root traits in 153 mungbean lines.
PRL, primary root length; TRL, total root length; TSA, total root surface area; RAD, root average diameter; TRV, total root volume; TRT, total root tips; RF, root forks; OP, optimum phosphorus condition; LP, low phosphorus condition.
Table 2.
Analysis of variance for the tested traits under two phosphorus regimes.
Table 3.
Pearson correlations among tested traits under optimumand low phosphorus conditions (sample size = 153).
Fig 2.
Percentage of root traits across five diameter classes assessed under two phosphorus regimes.
RL, root length; RSA, root surface area; RV, root volume; RT, root tips; OP, optimum phosphorus condition; LP, low phosphorus condition; A, all 153 mungbean genotypes; IRV, Indian released varieties; ABL, advanced breeding lines; GL, germplasm lines.
Table 4.
Percentage distribution of root traits across five root diameter classes under optimum and low phosphorus conditions in different groups.
Table 5.
The Shannon-Weaver diversity index (H’) and performance categories under two different phosphorus conditions.
Fig 3.
Biplots of first two principal components (PC) showing variation among seven root traits under optimum P and Low P condition.
PRL, primary root length; TRL, total root length, TSA, total root surface area; RAD, root average diameter; TRV, total root volume; TRT, total root tips; RF, root forks; OP, optimum phosphorus condition; LP, low phosphorus condition.
Table 6.
Principle component analysis of seven traits under two phosphorus conditions.
Fig 4.
Variation in root system architecture in four contrasting mungbean genotypes grown under optimum and low phosphorus conditions.
Fig 5.
The mean values of phosphorus efficiency coefficient for seven traits in five groups classified for phosphorus efficiency.
Groups 1, 2, 3, 4 and 5 represent mungbean genotypes identified with highly efficiency, efficiency, moderate efficiency, inefficiency and highly inefficiency. N = 21, 25, 48, 41 and 18 for groups 1, 2, 3, 4 and 5 respectively. PRL, primary root length; TRL, total root length; TSA, total root surface area; RAD, root average diameter; TRV, total root volume; TRT, total root tips; RF, root forks.
Table 7.
Variation in root architectural traits of ten contrasting mungbean genotypes under optimum and low phosphorus conditions.