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Table 2 Morphometric assessments of chloroplasts in expanded leaves of winter and summer (±SD, n = 36)

From: Traits of seasonal dimorphism associated with adaptation to cold stress in Origanum dictamnus L. (Lamiaceae)

  Winter leaves Summer leaves
Number of chloroplasts per palisade cell section 10.7 ± 2.2a 16.8 ± 3.5b
Number of chloroplasts per spongy cell section 5.1 ± 1.4a 8.8 ± 2.3b
Relative volume (%) of grana per chloroplast 18.3 ± 5.5a 42.1 ± 8.6b
Relative volume (%) of starch grains per chloroplast 3.4. ± 1.2a 14.5 ± 3.7b
Relative volume (%) of plastoglobuli per chloroplast 6.8 ± 1.6a 4.2 ± 0.9b
  1. Means between columns with different letters are significantly different at p < 0.05.