Table 2 Effect of ACC deaminase containing PGPR in combination with various rates of timber waste biochar (0BC, 1BC and 2BC) on photosynthetic pigments under various levels of drought (D).

Control_{(No PGPR+No BC)}

1.04

0.67

0.39

0.70^E

0.29

0.26

0.10

0.22^G

1.33

0.93

0.50

0.92^H

L. adecarboxylata

1.21

0.92

0.78

0.97^D

0.43

0.34

0.15

0.31^EF

1.64

1.26

0.93

1.28^G

A. fabrum

1.14

0.93

0.83

0.96^D

0.40

0.38

0.12

0.30^EF

1.54

1.31

0.95

1.27^G

P. aeruginosa

1.09

0.92

0.78

0.93^D

0.36

0.31

0.14

0.27^F

1.45

1.24

0.93

1.20^G

B. amyloliquefaciens

1.12

1.04

1.04

1.07^CD

0.42

0.39

0.17

0.32^EF

1.54

1.42

1.21

1.39^FG

1BC

1.43

1.31

1.07

1.27^BC

0.40

0.40

0.17

0.32^EF

1.82

1.71

1.24

1.59^EF

L. adecarboxylata + 1BC

1.58

1.36

1.17

1.37^AB

0.43

0.38

0.18

0.33^E

2.02

1.74

1.36

1.70^C–E

A. fabrum + 1BC

1.42

1.38

1.29

1.36^AB

0.42

0.40

0.22

0.35^DE

1.84

1.78

1.52

1.71^C–E

P. aeruginosa + 1BC

1.58

1.26

1.15

1.33^AB

0.45

0.38

0.18

0.34^E

2.03

1.64

1.33

1.67^DE

B. amyloliquefaciens + 1BC

1.53

1.35

1.24

1.37^AB

0.48

0.41

0.29

0.40^CD

2.01

1.76

1.54

1.77^B–E

2BC

1.60

1.42

1.17

1.40^AB

0.51

0.47

0.26

0.41^BC

2.10

1.89

1.44

1.81^A–D

L. adecarboxylata + 2BC

1.64

1.37

1.30

1.44^AB

0.51

0.44

0.28

0.41^BC

2.14

1.81

1.58

1.85^A–D

A. fabrum + 2BC

1.59

1.44

1.35

1.46^AB

0.55

0.52

0.31

0.46^AB

2.15

1.96

1.66

1.92^AB

P. aeruginosa + 2BC

1.61

1.51

1.29

1.47 ^AB

0.52

0.49

0.29

0.43^BC

2.12

2.00

1.58

1.90^A–C

B. amyloliquefaciens + 2BC

1.65

1.49

1.35

1.50^A

0.56

0.51

0.38

0.49^A

2.21

2.00

1.74

1.98^A

ME (D)

1.41^A

1.22^B

1.08^C

0.45^A

0.41^B

0.22^C

1.86^A

1.63^B

1.30^C