Table 7 Effect of SPM on chlorophyll fluorescence parameters (Fv/Fm, Fv/F0, ΔF/Fm’) in water deprived sweet corn genotypes (n = 3). Different small letters indicate significant differences (p ≤ 0.05) among the treatments of each genotype, and different capital letters indicate significant differences (p ≤ 0.05) among genotypes within each treatment.

From: Spermine driven water deficit tolerance in early growth phases of sweet corn genotypes under hydroponic cultivation

Trait

Treatment

Genotypes

  

Dessert

Messenger

Tyson

Royalty

ΔF/Fm’

Control

0.75cA

0.75cdA

0.84aA

0.76cA

 

SPM

0.76cA

0.74cdA

0.76aA

0.78cA

 

8% PEG

0.66bB

0.70bcA

0.70abA

0.64bB

 

12% PEG

0.56aB

0.63aA

0.56bB

0.53aB

 

8% PEG + SPM

0.73cA

0.68abAB

0.75aA

0.63bB

 

12% PEG + SPM

0.76cA

0.77dA

0.80aA

0.75cA

Fv/F0

Control

3.92cA

3.91bcA

3.63bA

4.19cA

 

SPM

4.11cA

4.06cA

3.91abA

3.83cA

 

8% PEG

3.18bA

2.96abA

1.71cA

2.81bA

 

12% PEG

2.46aA

2.49aA

1.60cB

1.81aB

 

8% PEG + SPM

4.09cA

2.87abB

4.27aA

2.00aC

 

12% PEG + SPM

3.98cA

4.03cA

3.68bA

3.92cA

Fv/Fm

Control

0.80cA

0.80aA

0.78aA

0.81cA

 

SPM

0.80cA

0.80aA

0.80aA

0.79cA

 

8% PEG

0.76bA

0.73aA

0.62bA

0.74bA

 

12% PEG

0.71aA

0.71aA

0.61bB

0.64aB

 

8% PEG + SPM

0.80cA

0.74aB

0.81aA

0.66aC

 

12% PEG + SPM

0.80cA

0.80aA

0.78aA

0.80cA

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