Table 5 Principal component analysis of arugula genotypes under non-stress and drought stress conditions averaged over the two study years (2019 and 2020).

From: Response of seed yield and biochemical traits of Eruca sativa Mill. to drought stress in a collection study

Year

Non-stress

Drought stress

Index

Component 1

Component 2

Component 1

Component 2

Chla

0.47

 − 0.11

0.27

 − 0.42

Chlb

0.47

 − 0.11

0.22

 − 0.36

TChl

0.49

 − 0.11

0.30

 − 0.48

Car

0.42

 − 0.05

0.31

 − 0.31

POX

0.01

 − 0.39

0.26

0.11

APX

 − 0.93

0.17

0.19

0.14

CAT

0.01

0.16

0.32

0.17

MDA

0.01

 − 0.05

0.27

0.36

Proline

 − 0.11

0.27

0.33

0.30

RWC

0.16

0.41

0.24

0.12

TPC

0.08

0.50

0.22

0.13

TFD

0.21

0.33

0.27

0.13

SY

 − 0.15

 − 0.34

0.31

0.11

Percent of variation

27.17

18.53

37.76

14.76

Cumulative percentage

27.17

45.69

37.76

52.52

  1. Chla chlorophyll a, Chlb chlorophyll b, TChl total chlorophyll, Car carotenoids, POX peroxidase, APX ascorbate peroxidase, CAT catalase, MDA malondialdehyde, RWC relative water content, TPC total phenolics content, TFD total flavonoids, SY seed yield.
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