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Fig. 2 | BMC Plant Biology

Fig. 2

From: Comparative physiological and full-length transcriptome analyses reveal the molecular mechanism of melatonin-mediated salt tolerance in okra (Abelmoschus esculentus L.)

Fig. 2

Effects of melatonin (50 μM or 100 μM) pretreatment on photochemical activity and photosynthetic capacity of okra seedlings exposed to salt stress for 7 d by irrigating with 300 mM NaCl, with respective controls. a Images of the maximal photochemical efficiency of PSII (Fv/Fm). Bar = 2 cm. b Net photosynthetic rate. c Fv/Fm values. Data are means ± SD of six replicates. Bars with different letters are significantly different according to Duncan’s multiple range tests (P < .05). Mock, pretreatment with water and grown under optimum conditions; NaCl, pretreatment with water and subsequently subjected to salt stress; MT50, pretreatment with 50 μM melatonin and grown under optimum conditions; MT100, pretreatment with 100 μM melatonin and grown under optimum conditions; MT50 + NaCl, pretreatment with 50 μM melatonin and subsequently subjected to salt stress; MT100 + NaCl, pretreatment with 100 μM melatonin and subsequently subjected to salt stress

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