Table 1 Summary of analysis of variance of morphological and physiological characteristics.

From: Photo-selective shading screens as a cover for production of purple lettuce

Source of variance

DF

Mean squares (MS)

TFM

TDM

NL

SD

SL

LAa

SPAD

Season

1

30,381.1**

12.90*

153.5*

439.47**

12,394.2**

3262.6**

222.65*

Error a

4

243.7

1.124

1.75

0.81

108.4

28.61

4.39

Screen

3

1507.0*

3.376*

2.37ns

0.86ns

1341.1**

189.4*

32.85**

Season × screen

3

221.9ns

0.774ns

9.57ns

1.14ns

219.4ns

45.8 ns

7.31ns

Error b

12

393.4

0.765

5.16

2.89

105.5

50.98

3.75

Source of variance

DF

SFRG

SFRR

NBIG

NBIR

FLAV

ANTHRG

ANTHRB

Season

1

0.870**

1.016 **

4.05**

2.35**

1.174**

0.00806ns

0.00007ns

Error a

4

0.0208

0.00067

0.0128

0.0117

0.00032

0.0009

0.00033

Screen

3

0.103*

0.0213*

0.0138ns

0.0004ns

0.018**

0.00711*

0.0061*

Season × screen

3

0.054ns

0.0099ns

0.0218ns

0.019ns

0.0013ns

0.00450ns

0.0018ns

Error b

12

0.0197

0.0049

0.0157

0.0205

0.0004

0.00152

0.00107

  1. TFM total fresh matter (g), TDM total dry matter (g), NL number of leaves, SD stem diameter (mm), SL stem length (mm), LA leaf area (cm2).
  2. *Significant at 5% of probability (p < 0.05).
  3. ** Significant at 1% of probability (p < 0.01); ns no significant.
  4. aValues divided by 103.