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Table 2 ANOVA, regression coefficients, and summary statistics for percentage fresh weight increase and dry weights of nonembryogenic 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

Nonembryogenic tissue

 

Fresh Wgt.a

Dry Wgt.a

 

F Value

p-values

Regression coefficientsc

F Value

p-values

Regression coefficientsc

Model

87.23

< 0.0001

 

22.18

< 0.0001

 

Linear Mixture

279.34

< 0.0001

 

50.77

< 0.0001

 

   NH4

  

+ 15.24

  

- 0.98

   K

  

+ 2.63

  

- 1.20

NH4 * K

290.91

< 0.0001

+ 70.70

64.35

< 0.0001

+ 1.60

NH4 * [NO3]

7.72

0.0148

- 1.72

2.53

0.1326

- 0.049

K * [NO3]

15.50

0.0015

+ 8.34

1.49

0.2409

- 0.035

NH4 * K * [NO3]

10.37

0.0062

+ 9.99

0.54

0.4754

+ 0.11

NH4 * [NO3]2

0.16

0.6979

+ 0.41

0.20

0.6593

+ 0.023

K * [NO3]2

0.53

0.4771

+ 0.93

0.29

0.5950

- 0.034

NH4 * K * [NO3]2

70.53

< 0.0001

- 44.15

12.10

0.0034

- 0.89

K * [NO3]3

24.16

0.0002

- 11.45

-

-

 

Lack of Fit

p = 0.2641

p = 0.3634

R2

0.98

0.92

R2 adj

0.97

0.88

R2 pred

0.95

0.78

Std. Dev.

1.28

0.06

Mean

13.32

-1

C.V. %

9.63

6.33

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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