Table 5.

Impact of endogenous melatonin extracted from numerous fruit crops.

Fruit Crop Names	Concentrations (ng/g)	Functions	References
Kiwifruit	0.02	Its concentration was measured in the seeds of some fruits and showed that melatonin concentration varied from leaves to seeds. However, improved endogenous melatonin increased the plant immunity to survive against adverse conditions.	[52]
Apple	0.05 and 0.16	Endogenous melatonin level was measured in the seeds of apples. The improved level of melatonin in seeds resulted in rapid germination of seeds with healthy growth.	[87]
Cherry	18.00	Bio-fortification of melatonin enhanced endogenous level of melatonin.	[88]
Banana	0.01, 0.47 and 0.67	Seed germination and seedling growth can be improved with application of melatonin because it is a multifunctional molecule discovered two decades ago.	[89]
Pomegranate	0.17	Higher endogenous melatonin concentration was recorded in medicinal crops compared with other crop.	[90]
Walnut	3.50	Phyto-melatonin is a multifunctional molecule found to be more effective for survival of plants against adverse climatic conditions	[91]