Table 4 Effects of different concentrations of melatonin on JIP-test parameters of tomato leaves under saline-alkali stress.

From: Effects of exogenous melatonin on the growth and photosynthetic characteristics of tomato seedlings under saline-alkali stress

Treatments

Quantum yield for electron transport

ψEo

I point relatively variable

fluorescence intensity VI

J point relatively variable fluorescence intensity VJ

QA reduction

rate

dV/dto

Index of performance based on absorption

of light energy

PI(ABS)

CK

0.5019 ± 0.0111a

0.7389 ± 0.0105c

0.4029 ± 0.0131c

0.8969 ± 0.0289c

2.9587 ± 0.1689a

T0

0.3623 ± 0.0068c

0.8869 ± 0.0032a

0.5558 ± 0.0064a

1.1919 ± 0.0280a

1.2753 ± 0.1058c

T1

0.4021 ± 0.0263bc

0.8628 ± 0.0069ab

0.5070 ± 0.0258ab

1.0803 ± 0.0826ab

1.7123 ± 0.3270bc

T2

0.4665 ± 0.0141a

0.8330 ± 0.0150b

0.4529 ± 0.0135bc

0.9040 ± 0.0331c

2.4337 ± 0.1882a

T3

0.4446 ± 0.0128ab

0.8663 ± 0.0025ab

0.4649 ± 0.0177bc

0.09725 ± 0.0619c

2.2703 ± 0.1632ab

T4

0.3742 ± 0.0317c

0.8753 ± 0.0159a

0.5422 ± 0.0352a

1.1842 ± 0.1083a

1.4733 ± 0.2989c

  1. Note: The results in the table are means ± SE of three independent replications. Different letters in the table represent significant differences between treatments (p < 0.05).
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