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Table 3 Cross-correlation matrix between seed traits. R values in bold indicate adjusted P values  < 0.05. Ga, germination asynchrony parameter at different temperatures; PAR, pericarp/acorn mass ratio; Tb, base temperature for germination; T50, germination time at different temperatures; SE, shoot emergence; WC50, seed water content for 50% mortality

From: Intraspecific variation of Quercus ilex L. seed morphophysiological traits in Tunisia reveals a trade-off between seed germination and shoot emergence rates along a thermal gradient

 

Seed mass

PAR

Seed WC

t50-5 °C

Ga-5 °C

t50-9 °C

Ga-9 °C

t50-13 °C

Ga-13 °C

t50-17 °C

G-17 °C

t50-21 °C

Ga-21 °C

t50-SE 13 °C

Ga-SE 13 °C

Tb

WC50

Seed mass

-

 − 0.45

 − 0.12

 − 0.08

0.15

 − 0.08

0.03

0.38

0.35

 − 0.35

0.02

 − 0.32

0.30

0.28

0.07

0.57

 − 0.39

PAR

 − 0.45

-

0.15

0.04

0.17

0.19

0.39

 − 0.03

0.16

0.42

0.47

0.29

0.01

 − 0.05

 − 0.07

 − 0.30

0.23

Seed WC

 − 0.12

0.15

-

0.46

0.27

 − 0.33

 − 0.09

 − 0.29

 − 0.40

 − 0.08

 − 0.24

 − 0.16

 − 0.13

 − 0.57

 − 0.29

0.12

0.68

t50-5 °C

 − 0.08

0.04

0.46

-

0.41

 − 0.02

0.16

0.06

0.10

 − 0.13

 − 0.09

 − 0.10

0.22

 − 0.17

 − 0.29

0.31

0.81

Ga-5 °C

0.15

0.17

0.27

0.41

-

0.04

0.53

0.32

0.34

 − 0.15

0.45

 − 0.32

0.44

 − 0.03

 − 0.33

0.62

0.34

t50-9 °C

 − 0.08

0.19

 − 0.33

 − 0.02

0.04

-

0.42

0.35

0.32

0.69

0.64

0.74

0.51

0.25

 − 0.23

 − 0.20

 − 0.05

Ga-9 °C

0.03

0.39

 − 0.09

0.16

0.53

0.42

-

 − 0.06

0.15

0.29

0.79

0.17

0.33

 − 0.09

 − 0.36

 − 0.01

0.23

t50-13 °C

0.38

 − 0.03

 − 0.29

0.06

0.32

0.35

 − 0.06

-

0.76

 − 0.08

0.20

0.12

0.48

0.60

0.18

0.48

 − 0.32

Ga-13 °C

0.35

0.16

 − 0.40

0.10

0.34

0.32

0.15

0.76

-

 − 0.01

0.38

0.12

0.63

0.72

0.20

0.42

 − 0.46

t50-17 °C

 − 0.35

0.42

 − 0.08

 − 0.13

 − 0.15

0.69

0.29

 − 0.08

 − 0.01

-

0.59

0.77

0.22

0.07

 − 0.14

 − 0.52

0.10

Ga-17 °C

0.02

0.47

 − 0.24

 − 0.09

0.45

0.64

0.79

0.20

0.38

0.59

-

0.47

0.40

0.30

 − 0.17

 − 0.14

0.03

t50-21 °C

 − 0.32

0.29

 − 0.16

 − 0.10

 − 0.32

0.74

0.17

0.12

0.12

0.77

0.47

-

0.09

0.25

0.03

 − 0.69

0.05

Ga-21 °C

0.30

0.01

 − 0.13

0.22

0.44

0.51

0.33

0.48

0.63

0.22

0.40

0.09

-

0.10

 − 0.50

0.52

 − 0.07

t50-SE 13 °C

0.28

 − 0.05

 − 0.57

 − 0.17

 − 0.03

0.25

 − 0.09

0.60

0.72

0.07

0.30

0.25

0.10

-

0.66

0.05

 − 0.61

Ga-SE 13 °C

0.07

 − 0.07

 − 0.29

 − 0.29

 − 0.33

 − 0.23

 − 0.36

0.18

0.20

 − 0.14

 − 0.17

0.03

 − 0.50

0.66

-

 − 0.20

 − 0.46

Tb

0.57

 − 0.30

0.12

0.31

0.62

 − 0.20

 − 0.01

0.48

0.42

 − 0.52

 − 0.14

 − 0.69

0.52

0.05

 − 0.20

-

 − 0.12

WC50

 − 0.39

0.23

0.68

0.81

0.34

 − 0.05

0.23

 − 0.32

 − 0.46

0.10

0.03

0.05

 − 0.07

 − 0.61

 − 0.46

 − 0.12

-