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Table 4 Acyl chain length (ACL) of each main membrane lipid class in C. bifida and C. panzhihuaensis treated at low temperatures

From: Differences in lipid homeostasis and membrane lipid unsaturation confer differential tolerance to low temperatures in two Cycas species

Lipid class

Species

 

Treatment

  
  

Control

Cold

Freezing

Recovery

  

ACL

   

PA

C. bifida

35.26 ± 0.67b

35.03 ± 0.10b

35.08 ± 0.08b

35.91 ± 0.51a

 

C. panzhihuaensis

36.36 ± 0.62a*

35.73 ± 0.16b*

35.70 ± 0.21b*

36.00 ± 0.32ab

PC

C. bifida

34.99 ± 0.27b

34.89 ± 0.11b

34.99 ± 0.06b

35.50 ± 0.09a

 

C. panzhihuaensis

35.13 ± 0.07b

35.11 ± 0.04b*

35.33 ± 0.10a*

35.12 ± 0.17b*

PE

C. bifida

39.20 ± 4.61a

36.26 ± 0.37a

36.37 ± 0.16a

37.61 ± 0.98a

 

C. panzhihuaensis

39.33 ± 2.02b

37.07 ± 0.81c

44.68 ± 1.23a*

40.04 ± 1.75b*

PG

C. bifida

34.73 ± 0.78a

33.64 ± 0.19b

33.77 ± 0.07b

35.28 ± 0.55a

 

C. panzhihuaensis

36.20 ± 1.43a

35.06 ± 0.58a*

35.93 ± 0.22a*

36.02 ± 0.65a

PI

C. bifida

35.85 ± 1.97ab

34.41 ± 0.40b

34.96 ± 0.63ab

36.51 ± 0.25a

 

C. panzhihuaensis

35.21 ± 0.83b

36.02 ± 0.54b*

38.27 ± 0.47a*

36.06 ± 0.72b

PS

C. bifida

33.11 ± 0.02b

33.40 ± 0.11a

33.40 ± 0.18a

33.32 ± 0.04a

 

C. panzhihuaensis

33.44 ± 0.28b

33.82 ± 0.15a*

33.10 ± 0.03c*

33.29 ± 0.25bc

Phospholipids

C. bifida

36.04 ± 1.83a

34.81 ± 0.12a

35.03 ± 0.22a

36.43 ± 0.48a

 

C. panzhihuaensis

36.25 ± 0.10b

36.03 ± 0.24b*

38.06 ± 0.52a*

36.49 ± 0.47b

MGMG

C. bifida

17.23 ± 0.34a

17.41 ± 0.42a

17.50 ± 0.22a

17.15 ± 0.08a

 

C. panzhihuaensis

17.41 ± 0.12b

17.70 ± 0.14a

17.49 ± 0.12ab

17.64 ± 0.24a

MGDG

C. bifida

35.22 ± 0.53a

35.19 ± 0.16a

35.30 ± 0.07a

35.04 ± 0.07a

 

C. panzhihuaensis

35.41 ± 0.25b

35.26 ± 0.05b

35.78 ± 0.03a*

35.66 ± 0.07a*

DGDG

C. bifida

34.54 ± 0.23a

34.43 ± 0.24a

34.63 ± 0.18a

33.57 ± 0.46b

 

C. panzhihuaensis

34.71 ± 0.07c

34.96 ± 0.05a*

34.87 ± 0.02b*

34.92 ± 0.10ab*

SQDG

C. bifida

39.68 ± 0.36a

39.69 ± 0.30a

39.61 ± 0.04a

39.93 ± 0.01a

 

C. panzhihuaensis

39.71 ± 0.11a

39.77 ± 0.11a

39.29 ± 0.30b

39.76 ± 0.06a*

Saccharolipids

C. bifida

37.39 ± 0.29ab

36.94 ± 0.57b

36.75 ± 0.23b

37.52 ± 0.17a

 

C. panzhihuaensis

36.91 ± 0.42a

36.19 ± 0.27b*

37.20 ± 0.38a

37.05 ± 0.71a

Total

C. bifida

36.79 ± 0.75a

35.89 ± 0.20b

35.99 ± 0.11b

37.13 ± 0.23a

 

C. panzhihuaensis

36.73 ± 0.57b

36.15 ± 0.22b

37.47 ± 0.28a*

36.89 ± 0.64ab

  1. ACL = (∑[n × mol % lipid])/100, where n is the number of acyl carbons in each lipid molecule. Different letters in the same row indicate significant differences between treatments within species and * indicates significant difference between species within treatment (P < 0.05). Data are mean ± standard deviation (n = 5)
  2. DGDG Digalactosyldiacylglycerol, MGDG Monogalactosyldiacylglycerol, MGMG monogalactosylmonoacylglycerol, PA Phosphatidic acid, PC Phosphatidylcholine, PE Phosphatidylethanolamine, PG Phosphatidylglycerol, PI Phosphatidylinositol, PS Phosphatidylserine, SQDG Sulphoquinovosyldiacylglycerol
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BMC Plant Biology

ISSN: 1471-2229

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