Table 3 The effect of PEG and SiO₂-NPs on the SOD, POD, GPX, and CAT activity of the genotypes ‘Maragheh’ and ‘Kashan’

PEG (g L⁻¹)

SiO₂-NPs (mg L^− 1)

SOD (Unit mg^− 1 protein)

SOD (Unit mg^− 1 protein)

POD (Unit mg^− 1 protein)

POD (Unit mg^− 1 protein)

GPX (Unit mg^− 1 protein)

GPX (Unit mg^− 1 protein)

CAT (Unit mg^− 1 protein)

CAT (Unit mg^− 1 protein)

0

0

0.4154u

0.1762y

0.01323n

0.01283n

0.223 t

0.1681u

0.1171q

0.1926o

50

0.498 t

0.2552x

0.01537mn

0.0149mn

0.3114r

0.2693 s

0.1575p

0.2010o

100

0.525 s

0.3344w

0.01907 l-n

0.0231 k-n

0.3634op

0.3087r

0.1965o

0.2205n

25

0

0.5152 s

0.3517v

0.0238j-n

0.02553j-n

0.3765no

0.3446q

0.1966o

0.2259n

50

0.567r

0.4168u

0.02863i-n

0.02873i-n

0.4187 l

0.3965 m

0.2491 m

0.2629 m

100

0.6696p

0.4832 t

0.0333 h-l

0.0338 h-l

0.5044i

0.4524jk

0.3652i

0.2884 l

50

0

0.8178 l

0.5591r

0.02967i-m

0.03383 h-l

0.4967i

0.3586pq

0.3452j

0.258 m

50

0.9485 h

0.602q

0.0357 g-k

0.03957f-j

0.538 h

0.4384 k

0.3877 h

0.3637i

100

1.032e

0.7318o

0.04643d-h

0.04607e-h

0.6156f

0.5842 g

0.4536f

0.416 g

75

0

0.8704 k

0.7557n

0.03737f-k

0.04783c-h

0.5928 g

0.3842mn

0.4293 g

0.3087 k

50

1.007f

0.7898 m

0.0519c-g

0.0527c-f

0.675e

0.5418 h

0.4893e

0.3796hi

100

1.169b

0.9131j

0.0632bc

0.05927b-e

0.761c

0.7583c

0.5555c

0.4667f

100

0

0.9298i

0.903j

0.0432e-i

0.05927b-e

0.7097d

0.4655j

0.5353d

0.3671i

50

1.115d

0.9706 g

0.0626b-d

0.06317bc

0.7833b

0.5934 g

0.5926b

0.4207 g

100

1.305a

1.153c

0.08167a

0.0704ab

0.885a

0.7978b

0.6802a

0.5205d

 Drought (a)

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**

**

**

**

**

**

**

 Treatment (b)

**

**

**

**

**

**

**

**

 ab

**

**

**

**

**

**

**

**

 Genotype (c)

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**

**

**

**

**

**

**

**

**

ns

ns

**

**

**

**

**

**

**

**

**

**

**

**

**

**

**

**

**

**

**

**