Table 2.

Melatonin-related transgenic plants under stress.

Genetically Modified Plants	Melatonin Level (↑up↓down)	Stress Resistance
human SNAT/HIOMT overexpressed in Nicotiana sylvestris [82]	↑	increased resistance to UV-B radiation
human SNAT overexpressed in transgenic rice [81]	↑	increased cold resistance
Sheep HIOMT overexpressed in micro-tom tomato [83]	↑	increased resistance to drought
SNAT knockout mutant Arabidopsis [84]	↓	increased the susceptibility to avirulent pathogen
suppression of SNAT/ASMT in rice [85]	↓	increased the abiotic stress susceptibility
maize ASMT overexpressed in Arabidopsis [37]	↑	enhanced drought tolerance
tomato ASMT overexpressed in tomato [27]	↑	enhanced thermotolerance
SNAT knockout mutant Arabidopsis [31]	↓	decreased salinity tolerance
ovine AANAT/HIOMT overexpressed in switchgrass [86]	↑	improved salt-tolerance
rice SNAT overexpressed in rice [46]	↑	conferred resistance to cadmium
alfalfa SNAT overexpressed in Arabidopsis [49]	↑	conferred plant tolerance against cadmium