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Table 3 Double-bond index (DBI) of membrane lipids in Arabidopsis and rice after various low-temperature treatments

From: Glycerolipidome responses to freezing- and chilling-induced injuries: examples in Arabidopsis and rice

Lipid class

Plant species

 

Arabidopsis (−6 °C)/Rice (10 °C)

Arabidopsis (−12 °C)/Rice (4 °C)

  

C

T

R1

R3

T

R1

R3

  

Double-bond index (DBI)

DGDG

Arabidopsis

5.34 ± 0.04b*

5.41 ± 0.13ab*

5.47 ± 0.05a

5.49 ± 0.03a*

5.41 ± 0.04ab*

5.33 ± 0.06b*

5.08 ± 0.14c*

 

Rice

5.47 ± 0.02b

5.56 ± 0.02a

5.46 ± 0.01b

5.34 ± 0.02c

5.49 ± 0.02b

5.59 ± 0.03a

5.49 ± 0.06b

MGDG

Arabidopsis

5.94 ± 0.01a*

5.93 ± 0.02a*

5.89 ± 0.01b*

5.92 ± 0.03ab*

5.93 ± 0.02ab

5.81 ± 0.04c*

5.74 ± 0.05d*

 

Rice

5.89 ± 0.01b

5.89 ± 0.01b

5.83 ± 0.01cd

5.84 ± 0.01c

5.92 ± 0.00a

5.90 ± 0.01b

5.82 ± 0.03d

PG

Arabidopsis

3.16 ± 0.08a*

3.15 ± 0.11a*

3.09 ± 0.08a*

3.09 ± 0.10a*

3.11 ± 0.04a*

3.12 ± 0.06a*

2.97 ± 0.08b*

 

Rice

2.71 ± 0.04a

2.56 ± 0.02b

2.40 ± 0.05c

2.39 ± 0.04c

2.58 ± 0.08b

2.35 ± 0.11c

2.20 ± 0.10d

PA

Arabidopsis

3.36 ± 0.13d*

4.24 ± 0.23a*

3.81 ± 0.12b*

3.58 ± 0.16c*

3.82 ± 0.07b*

3.77 ± 0.04b*

3.39 ± 0.08d*

 

Rice

2.79 ± 0.18c

3.16 ± 0.10b

2.93 ± 0.20c

2.95 ± 0.19c

3.32 ± 0.06ab

3.42 ± 0.05a

3.21 ± 0.06b

PC

Arabidopsis

3.77 ± 0.04ab*

4.03 ± 0.15a*

3.84 ± 0.11ab*

3.73 ± 0.06ab*

3.73 ± 0.13ab*

3.54 ± 0.09b*

3.60 ± 0.58b

 

Rice

3.17 ± 0.02c

3.17 ± 0.01c

3.03 ± 0.04d

3.05 ± 0.04d

3.36 ± 0.03a

3.28 ± 0.06b

3.26 ± 0.06b

PE

Arabidopsis

3.51 ± 0.08ab*

3.65 ± 0.11a*

3.51 ± 0.12ab*

3.49 ± 0.05abc*

3.29 ± 0.09c*

2.99 ± 0.18d

3.39 ± 0.29bc*

 

Rice

3.17 ± 0.03b

3.12 ± 0.02b

3.18 ± 0.03b

3.26 ± 0.05a

3.12 ± 0.02b

3.00 ± 0.08c

3.03 ± 0.07c

PI

Arabidopsis

2.78 ± 0.02b

2.99 ± 0.08a*

2.82 ± 0.07b*

2.79 ± 0.04b*

2.78 ± 0.03b*

2.80 ± 0.01b*

2.65 ± 0.10c*

 

Rice

2.78 ± 0.04c

2.86 ± 0.03b

2.61 ± 0.03d

2.60 ± 0.01d

3.19 ± 0.06a

2.90 ± 0.06b

2.79 ± 0.03c

PS

Arabidopsis

2.62 ± 0.06a*

2.74 ± 0.12a*

2.74 ± 0.08a*

2.64 ± 0.08a*

2.78 ± 0.26a*

2.71 ± 0.09a*

2.49 ± 0.59a

 

Rice

2.47 ± 0.03a

2.41 ± 0.10ab

2.41 ± 0.05ab

2.45 ± 0.05a

2.47 ± 0.10a

2.34 ± 0.08b

2.43 ± 0.05ab

Total

Arabidopsis

5.58 ± 0.04a*

5.46 ± 0.06b*

5.46 ± 0.02b*

5.54 ± 0.05ab*

4.33 ± 0.07c*

4.08 ± 0.11d*

4.08 ± 0.15d*

 

Rice

5.40 ± 0.04a

5.39 ± 0.02a

5.33 ± 0.02ab

5.39 ± 0.01a

5.26 ± 0.07b

5.01 ± 0.07c

4.71 ± 0.17d

  1. DBI = (∑[N × mol % lipid])/100, N is the total number of double bonds in the two fatty acid chains of each glycerolipid molecule. “C” represents “control”, “T” indicates samples taken immediately after each cold treatment, and “R1” and “R3” indicate samples taken after post treatment recovery for 1 and 3 days, respectively. Values in the same row marked with different letters are significantly different, while an asterisk means that the value in Arabidopsis is significantly different from that in rice (p < 0.05). Values are means ± SD (n = 4 or 5)