Table 1.

Summary of PIN genes in 31 plants found by genome-wide analysis.

Species	No. of Predicted Loci a	No. of PIN Genes	References
Arabidopsis thaliana	27,416	8	[17]
Arabidopsis lyrata	32,670	8	[17,36]
Aquilegia caerulea	-	6	[36]
Brachypodium distachyon	31,694	11	[17,36]
Brassica rapa	40,492	15	[37]
Carica papaya	24,782	6	[38]
Capsicum annuum	34,899	10	[39]
Citrullus lanatus	23,440	11	[40]
Glycine max	56,044	23	[26,27]
Gossypium arboreum	41,330	12	[41]
Gossypium hirsutum	66,577	17	[41,42]
Gossypium raimondii	37,505	10	[41]
Lotus japonicus	42,399	11	[27,43]
Marchantia polymorpha	19,287	4	[36]
Medicago truncatula	50,894	11	[44,45]
Mimulus guttatus	28,140	10	[36]
Nicotiana tabacum	-	20	[46]
Nicotiana sylvestris	-	11	[46]
Nicotiana tomentosiformis	-	12	[46]
Oryza sativa	39,049	12	[36,47,48]
Phaseolus vulgaris	27,082	16	[27]
Phyllostachys heterocycla	31,987	14	[49]
Physcomitrella patens	26,610	5	[36]
Populus trichocarpa	41,335	15	[28,50]
Selaginella moellendorffii	22,273	9	[29]
Setaria italica	34,584	12	[51]
Solanum lycopersicum	34,727	10	[52]
Sorghum bicolor	34,129	11	[53]
Solanum tuberosum	39,031	10	[54]
Vitis vinifera	26,346	8	[17,29]
Zea mays	63,480	15	[55,56]

^a The data were from Phytozome (available online: https://phytozome.jgi.doe.gov/pz/portal.html/) and the Plant Genome Duplication Database (PGDD, available online: http://chibba.agtec.uga.edu/duplication/) [57].