Table 2.
Root dry matter, root:shoot ratio, root length and root volume of the ten bottle gourd genotypes and two watermelon cultivars grown under low (0.3 mM) and high (3.0 mM) N supply in Expt. 1.
| Expt. 1 | Root Dry Matter (g plant−1) |
Root:Shoot (g g−1) |
Root Length (m plant−1) |
Root Volume (cm3 plant−1) |
||||
|---|---|---|---|---|---|---|---|---|
| Genotype | Low N | High N | Low N | High N | Low N | High N | Low N | High N |
| 01-18 | 2.60 f | 2.11 F | 0.35 d | 0.06 G | 410.4 g | 336.4 I | 54.2 f | 38.9 G |
| 07-45 | 7.53 b | 5.83 A | 0.52 b | 0.14 A | 650.4 b | 523.6 B | 129.2 ab | 94.7 AB |
| 35-10 | 3.09 e | 2.64 E | 0.42 c | 0.09 E | 484.5 f | 408.7 H | 102.9 d | 73.5 E |
| 41-01 | 5.26 d | 4.90 B | 0.56 b | 0.13 B | 578.2 cd | 512.4 C | 113.5 cd | 90.2 BC |
| 42-11 | 5.52 c | 4.13 D | 0.55 b | 0.10 D | 582.6 cd | 457.6 F | 117.5 bc | 82.8 CD |
| 45-04 | 5.57 c | 4.62 C | 0.64 a | 0.12 C | 597.4 c | 486.7 E | 126.8 bc | 91.8 AB |
| 45-07 | 2.44 f | 1.86 G | 0.35 d | 0.07 F | 386.2 h | 279.7 J | 84.1 e | 54.9 F |
| 47-04 | 5.28 d | 4.12 D | 0.56 b | 0.11 C | 568.7 de | 448.1 G | 120.8 bc | 81.1 DE |
| 70-07 | 7.90 a | 6.03 A | 0.54 b | 0.14 A | 730.0 a | 550.7 A | 143.3 a | 99.6 A |
| TR-50 | 5.11 d | 4.78 BC | 0.67 a | 0.14 A | 556.0 e | 497.7 D | 113.6 cd | 87.5 CD |
| C. Sweet | 1.26 h | 0.56 I | 0.22 e | 0.07 F | 229.3 j | 114.5 L | 26.0 g | 11.7 H |
| S. Baby | 1.78 g | 0.92 H | 0.26 e | 0.07 F | 330.2 i | 205.6 K | 35.5 g | 19.8 H |
| Genotype | *** | *** | *** | *** | ||||
| N rate | *** | *** | *** | *** | ||||
| Geno. × N | *** | *** | ** | *** | ||||
Values denoted by different letters (lower- and upper-case letters for low and high N supply, respectively) are significantly different between genotypes within columns at p < 0.05. ns, non-significant. * p < 0.05, ** p < 0.01 and *** p < 0.001.