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Table 2 The proportion of each lipid category 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 category Species Treatment    
   Control Cold Freezing Recovery
   Lipid proportion (%)
Neutral glycerolipids C. bifida 15.50 ± 6.63b 7.11 ± 1.78c 8.76 ± 2.04c 23.86 ± 1.16a
  C. panzhihuaensis 16.72 ± 6.93a 9.35 ± 1.89b 17.81 ± 4.63a* 15.12 ± 0.80a*
Glycerophospholipids C. bifida 31.09 ± 5.19b 40.77 ± 3.67a 35.90 ± 6.46ab 21.87 ± 2.38c
  C. panzhihuaensis 21.99 ± 1.03b* 20.58 ± 1.84b* 24.58 ± 1.64a* 21.11 ± 1.32b
Saccharolipids C. bifida 44.69 ± 4.48a 44.02 ± 5.24a 46.47 ± 4.19a 41.47 ± 2.81a
  C. panzhihuaensis 54.86 ± 7.14b* 65.25 ± 1.91a* 50.55 ± 5.31b 55.87 ± 2.26b*
Lysophospholipids C. bifida 1.92 ± 0.94a 3.06 ± 0.92a 3.06 ± 0.68a 2.15 ± 0.28a
  C. panzhihuaensis 0.51 ± 0.28a* 0.59 ± 0.14a* 0.43 ± 0.29a* 0.76 ± 0.15a*
Sphingolipids C. bifida 2.89 ± 0.79b 2.25 ± 1.05b 2.27 ± 0.45b 6.03 ± 1.19a
  C. panzhihuaensis 2.17 ± 0.50a 1.60 ± 0.24a 2.25 ± 0.59a 2.27 ± 0.61a*
Sterol lipids C. bifida 1.51 ± 0.39b 1.30 ± 0.39b 1.85 ± 0.22b 3.27 ± 0.73a
  C. panzhihuaensis 1.48 ± 0.52a 1.29 ± 0.75a 1.72 ± 0.47a 2.30 ± 0.43a*
Prenol lipids C. bifida 1.97 ± 0.64a 1.44 ± 0.34a 1.53 ± 0.25a 0.81 ± 0.18b
  C. panzhihuaensis 2.08 ± 0.45a 1.17 ± 0.35b 2.17 ± 0.53a* 2.05 ± 0.18a*
Fatty acyls C. bifida 0.40 ± 0.10a 0.04 ± 0.02b 0.17 ± 0.04b 0.55 ± 0.24a
  C. panzhihuaensis 0.19 ± 0.08b* 0.17 ± 0.03b* 0.51 ± 0.20a* 0.15 ± 0.04b*
  1. 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)