Table 3.

Reduction of scion growth due to the interstock.

Scion Cultivar	Interstock	Rootstock	Key Findings	References
‘Yuanxiaochun’	‘Ponkan Shiranuhi’, ‘Hammi Taroceo’and ‘Kumquat’	‘Trifoliate orange’	The growth, development, and photosynthetic features of ‘Yuanxiaochun’ trees are significantly affected by interstocks. The grafted plant with ‘Shiranuhi’ as the interstock had the lowest values of morphological traits.	[62]
‘Navel orange’	‘Volkamer lemon’ and ‘Sour orange’	‘Volkamer lemon’ and ‘Sour orange’	Plants grafted on ‘Volkamer lemon’ had the tallest scion, longest roots, and most leaf numbers. Further, the scion stem recorded the highest contents of Mg, N, K, Fe, Zn, P, Mn, and phenols.	[66]
‘Mexican lime’	Different citrus types used as interstocks	‘Alemow’ (Mac)	‘Hiryu’ and ‘Flying Dragon’ rootstocks performed well when used as dwarfing interstocks. Moreover, the use of dwarfing trees allowed for the establishment of higher planting densities, reaching up to 600 trees per hectare.	[67]
‘C. reticulata’	‘C. grandis’	‘C. hystrix’	Compared to other combinations, citrus (Scion/rootstock/interstock/) combinations [‘C. reticulata’/’C. aurantifolia’/’C. aurantium’] produced lower values for morphological traits, i.e., plant height, root dry matter, etc. When ‘C. grandis’ was used as the rootstock and ‘C. hystrix’ as the interstock, there were no symptoms of HLB after six months of inoculation.	[60]
‘Satsuma mandarin’	‘Flying Dragon’ trifoliate orange	‘Flying Dragon’ trifoliate orange	High fruit soluble solids and size reduction are results of reduced sap flow in the scion cultivar caused by a heavy crop load and/or ‘Flying Dragon’ rootstocks or interstocks.	[68]
‘Salustiana orange’ (SAO), ‘Valencia Late’ (VLO)	‘Valencia Late’ grafted on CM/SO (CM/SAO/VLO)	‘Cleopatra mandarin’ (CM)	Interstock graft combinations had greater root growth than shoot growth, resulting in a lower shoot/root ratio than other combinations.	[69]