Nitrogen Conditions

Water Conditions

VF (number mm^{−2})

VLD (μm)

FLD (μm)

XT (mm)

XCL

PT (mm)


Well Watered

Low Nitrogen

68.8 c±4.6

45.4 a ±2.5

13.5 b ±0.3

0.51 b ±0.02

37.9 b ±0.9

0.10 b ±0.01

Adequate Nitrogen

72.9 c ±13.0

45.6 a ±2.5

15.7 a ±0.3

0.77 a ±0.03

49.3 a ±2.2

0.11 ab ±0.01

Drought

Low Nitrogen

97.8 b ±3.9

45.2 a ±2.3

13.2 b ±0.6

0.34 c ±0.03

26.1 c ±1.9

0.11 ab ±0.01

Adequate Nitrogen

139.6 a ±9.5

39.5 a ±5.5

12.7 b ±0.7

0.5 b ±0.02

39.6 b ±2.3

0.12 a ±0.01

F Value of Twoway ANOVA

Nitrogen (N)

10.7*

1.9

8.3*

345.1**

133.2**

5.8*

Water (W)

49.6**

2.4

31.9**

378.8**

105.6**

1.4

N × W

8.8*

2.2

20.7**

19.6**

1.2

0.00

 VF vessel frequency; VLD vessel lumen diameter; FLD fiber lumen diameter; XT xylem thickness; XCL xylem cell layers; PT phloem thickness. Means with different letters are statistically different in multiple comparisons between treatments at the 5% level in ANOVAs. Level of significance of F value in twoway ANOVA is denoted by: *0.05 > p > 0.01, **p < 0.01