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Table 5 Chlorophyll a, b contents and chl a/b of eight cotton genotypes/ strains/cultivars grown in normal soil at flowering stage when subjected to short-term hypoxia conditions

From: Hypoxia tolerance studies for yield, fiber and physiological traits in cotton (Gossypium hirsutum L.)

  Genotypes/strains/accessions/cultivars
MNH-564 FH-114 MNH-786 CIM-573 N-KRISHMA LRA 5166 CEDIX H-142
Chlorophyll a /(mg·g− 1)
 Control 1.219 ± 0.09 0.97 ± 0.016 0.981 ± 0.023 1.686 ± 0.036 1.35 ± 0.107 1.301 ± 0.024 1.19 ± 0.005 0.864 ± 0.011
 Waterlogging/ Hypoxia 1.551 ± 0.09 1.28 ± 0.022 0.909 ± 0.02 1.664 ± 0.042 1.26 ± 0.103 0.953 ± 0.026 1.06 ± 0.008 0.995 ± 0.034
 LSD (0.05) Control × Waterlogging = 0.59
Chlorophyll b /(mg·g− 1)
 Control 0.49 ± 0.023 0.449 ± 0.02 0.38 ± 0.043 0.688 ± 0.019 0.69 ± 0.014 0.484 ± 0.027 0.345 ± 0.02 0.515 ± 0.035
 Waterlogging / Hypoxia 1.07 ± 0.03 0.929 ± 0.02 0.61 ± 0.033 0.797 ± 0.016 0.67 ± 0.015 0.439 ± 0.028 0.329 ± 0.02 0.511 ± 0.037
 LSD (0.05) Control × Waterlogging = 0.24
Chlorophyll (a/b)
 Control 2.488 ± 0.08 2.169 ± 0.18 2.568 ± 0.07 2.451 ± 0.037 1.954 ± 0.14 2.688 ± 0.131 3.072 ± 0.15 1.678 ± 0.12
 Waterlogging / Hypoxia 1.445 ± 0.09 1.378 ± 0.24 1.483 ± 0.06 2.087 ± 0.046 1.876 ± 0.10 2.17 ± 0.124 3.23 ± 0.12 1.947 ± 0.14
 LSD (0.05) Control×Waterlogging = 0.132
Chlorophyll SPAD
 Control 32.15 ± 1.50 32.37 ± 1.81 30.21 ± 1.58 33.133 ± 1.99 33.13 ± 0.86 36.85 ± 0.53 30.327 ± 0.44 39.08 ± 0.61
 Waterlogging / Hypoxia 36.03 ± 0.58 34.07 ± 0.58 38.85 ± 0.44 34.921 ± 0.15 32.81 ± 0.56 35.97 ± 0.37 35.35 ± 0.60 32.37 ± 0.12
 LSD (0.05) Control × Waterlogging = 1.767