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Table 3 ANOVA, Regression coefficients, and summary statistics for percentage fresh weight increase and dry weights of embryogenic tissue.

From: The effects of nitrogen and potassium nutrition on the growth of nonembryogenic and embryogenic tissue of sweet orange (Citrus sinensis(L.) Osbeck)

Source

Embryogenic tissue

 

Fresh Wgt.a

Dry Wgt.a

 

F Value

p-values

Regression coefficientsc

F Value

p-values

Regression coefficientsc

Model

59.82

< 0.0001

 

49.07

< 0.0001

 

Linear Mixture

350.72

< 0.0001

 

153.04

< 0.0001

 

   NH4

  

+ 21.15

  

+ 0.19

   K

  

+ 6.01

  

+ 0.085

NH4 * K

73.69

< 0.0001

+ 36.18

86.33

< 0.0001

+ 0.54

NH4 * [NO3]

5.68

0.0330

- 6.89

53.20

< 0.0001

+ 0.065

K * [NO3]

2.38

0.1471

+ 3.15

0.65

0.4339

- 6.69E-03

NH4 * K * [NO3]

0.42

0.5276

- 1.97

0.76

0.3964

- 0.038

NH4 * [NO3]2

15.18

0.0018

- 4.13

0.24

0.6279

+ 7.27E-03

K * [NO3]2

0.11

0.7409

- 0.42

0.27

0.6102

- 9.41E-03

NH4 * K * [NO3]2

5.76

0.0321

- 12.44

6.93

0.0188

- 0.20

NH4 * [NO3]3

6.95

0.0205

+ 7.95

-

-

-

K * [NO3]3

2.23

0.1596

- 3.35

-

-

-

Lack of Fit

p = 0.3024

p = 0.0036

R2

0.98

0.96

R2 adj

0.96

0.94

R2 pred

0.80

0.89

Std. Dev.

1.24

0.018

Mean

14.53

0.17

C.V. %

8.52

10.59

Model type

reduced quadratic × cubicb

quadratic × quadratic

  1. a Data transformation was determined by a Box Cox plot analysis – fresh weight data were transformed by square root and NE dry weight by log base 10.
  2. b Model reduction by backward elimination.
  3. c Presented in coded form. Coding normalizes the factor ranges by placing their low and high range value between -1 and +1 and can thus be directly compared.
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BMC Plant Biology

ISSN: 1471-2229

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