Occurrence and significance of polysomaty in species of Mimosa L.

Figures & data

Table 1. Identification of 68 Mimosa species and accessions analyzed, place of collection, chromosome number (after Dahmer et al. 2011) and percentages of polysomatic cells after PDB treatment.

Species	Accession	Place of collection	2n	Percentage of polysomatic cells with 39, 52, 78 and 104 chromosomes				Total percentage of polysomatic cells
				39	52	78	104
M. acutistipula Benth. var. acutistipula	Way, M.J. 2438	Brazil, Pernambuco	52	0	0	16	0	16
M. adenocarpa Benth.^b	Simon, M.F. 728	Brazil, Distrito Federal	26	0	30	0	0	30
M. albolanata Taub.	Simon, M.F. 677	Brazil, Goiás	26	0	25	0	0	25
M. apodocarpa Benth.^ab	Simon, M.F. 635	Brazil, Tocantins	26	0	29	0	13	42
M. artemisiana Heringer & Paula^b	Faria, S.M. 138	Brazil, Minas Gerais	26	0	25	0	0	25
M. bahamensis Benth.	Way, M.J. 100	Mexico, Yucutan	26	8	8	0	0	16
M. biuncifera Benth.	Newman, M. 284	USA, Arizona	52	0	0	0	12	12
M. borealis A. Gray^b	Simon, M.F. 873	USA, Oxford	26	0	66	0	0	66
M. camporum Benth.	Sanou, L. 315	Burkina Faso	26	0	18	0	0	18
M. claussenii Benth.	Simon, M.F. 308	Brazil, Goiás	26	0	14	11	0	25
M. cryptothamnos Barneby	Simon, M.F. 738	Brazil, Goiás	26	0	8	0	0	8
M. debilis Humb. & Bonpl. Ex Willd.	Simon, M.F. 790	Brazil, Mato Grosso	26	0	10	0	0	10
M. delicatula Baill.	Sutherland J.M. 262	Madagascar, Amborosary	26	0	12	0	0	12
M. depauperata Benth.	Simon, M.F. 801	México, Queretaro	26	3	7	0	0	10
M. diplotricha C.Wright ex Sauvalle^ab	Simon, M.F. 304	Brazil, Distrito Federal	26	0	7	0	0	7
M. diplotricha	Simon, M.F. 877	Taiwan, Ping-Tung	26	0	28	0	0	28
M. dutrae Malme	Dahmer, N. 05	Brazil, Rio Grande do Sul	52	0	0	0	15	15
M. dutrae	Dahmer, N. 21	Brazil, Rio Grande do Sul	52	0	0	0	14	14
M. dutrae	Dahmer, N. 25	Brazil, Rio Grande do Sul	52	0	0	0	13	13
M. dutrae	Dahmer, N. 80	Brazil, Rio Grande do Sul	52	0	0	0	70	70
M. dutrae	Dahmer, N. 81	Brazil, Rio Grande do Sul	52	0	0	34	41	75
M. dysocarpa Benth.	Newman, M. 296	USA, Arizona	26	33	26	0	0	59
M. echinocaula Benth.^ab	Simon, M.F. 312	Brazil, Goiás	26	0	27	0	0	27
M. foliolosa Benth.^ab	Simon, M.F. 321	Brazil, Distrito Federal	26	0	41	0	0	41
M. foliolosao	Simon, M.F. 663	Brazil, Distrito Federal	26	0	15	0	18	33
M. goldmanii B. L. Rob.^b	James, EK 326	México, Morelos	52	0	0	0	48	48
M. heringeri Barneby^ab	Proença, C. 2138	Brazil, Distrito Federal	26	0	27	0	0	27
M. incana (Spreng.) Benth.	Dahmer, N. 01	Brazil, Rio Grande do Sul	52	0	0	0	5	5
M. incana	Dahmer, N. 02	Brazil, Rio Grande do Sul	52	0	0	0	14	14
M. incana	Dahmer, N. 17	Brazil, Rio Grande do Sul	52	0	0	3	8	11
M. incana	Dahmer, N. 18	Brazil, Rio Grande do Sul	52	0	0	0	9	9
M. incana	Dahmer, N. 22	Brazil, Rio Grande do Sul	52	0	0	12	13	25
M. incana	Dahmer, N. 26	Brazil, Rio Grande do Sul	52	0	0	0	21	21
M. incana	Dahmer, N. 51	Brazil, Rio Grande do Sul	52	0	0	13	18	31
M. incana	Dahmer, N. 53	Brazil, Rio Grande do Sul	52	0	0	0	6	6
M. incana	Dahmer, N. 84	Brazil, Rio Grande do Sul	52	0	0	24	17	41
M. incana	Dahmer, N. 86	Brazil, Rio Grande do Sul	52	0	0	0	12	12
M. lacerata Rose^b	Simon, M.F. 806	Mexico, Queretaro	26	0	42	35	10	87
M. luisana Brandegee^b	Way, M.J. 09	Mexico, Puebla	26	0	31	0	4	35
M. monancistra Benth.^b	Simon, M.F. 809	Mexico, Guanajuato	26	0	10	0	0	10
M. ophthalmocentra Mart. Ex Benth.	Way, M.J. 2434	Brazil, Pernambuco	26	0	17	0	0	17
M. orthocarpa Spruce Ex Benth.^ab	Grether, R. 2907	Mexico, Veracruz	26	0	18	0	0	18
M. orthocarpa ^ab	Simon, M.F. 855	Mexico, Veracruz	26	0	9	0	0	9
M. papposa Benth. var. papposa ^b	Proença, C 3431	Brazil, Distrito Federal	26	0	23	12	14	49
M. pigra L. var. dehiscens ^b	Simon, M.F. s.n.	Brazil, Goiás	26	0	12	0	0	12
M. pigra var. dehiscens	Simon, M.F. 799	Brazil, Mato Grosso	26	0	21	0	0	21
M. polyantha Benth.^ab	Simon, M.F. 827	Mexico, Sinaloa	26	0	11	0	0	11
M. polycarpa Kunth var. subandina Barneby^b	Sarkinen, T.E. 2061	Bolivia, La Paz	26	0	0	11	0	11
M. polydactyla Humb. & Bonpl. Ex Willd.	Coradin, L. 8682	Brazil, Bahia	26	0	12	0	0	12
M. polydidyma Barneby	Simon, M.F. 719	Brazil, Bahia	26	0	13	0	0	13
M. pteridifolia Benth	Simon, M.F. 311	Brazil, Goiás	26	0	8	0	0	8
M. pudica L.^b	MSB 19956		52	0	0	15	12	27
M. pudica L. var. hispida Brenan^b	Simon, M.F. 893	Brazil, Distrito Federal	52	0	0	0	17	17
M. radula Benth.	Simon, M.F. 296	Brazil, Goiás	26	0	20	0	0	20
M. revoluta Benth.	Sarkinen, T.E. 2074	Bolívia, La Paz	26	0	25	0	0	25
M. scabrella Benth.	Dahmer, N. 65	Brazil, Rio Grande do Sul	52	0	0	0	29	29
M. scabrella	Dahmer, N. 72	Brazil, Rio Grande do Sul	52	0	0	19	28	47
M. scabrella	Dahmer, N. 78	Brazil, Rio Grande do Sul	52	0	0	0	52	52
M. scabrella	Dahmer, N. 79	Brazil, Rio Grande do Sul	52	0	0	11	32	43
M. scabrella ^ab	Lima, H.C. 4055	Brazil, Minas Gerais	52	0	0	18	2	20
M. sericantha Benth.	Simon, M.F. 410	Brazil, Tocantins	26	0	16	0	0	16
M. setosa Benth. var. paludosa Barneby	Simon, M.F. 306	Brazil, Distrito Federal	52	0	0	16	8	24
M. setosa Benth. var. urbica Barneby	Simon, M.F. 730	Brazil, Distrito Federal	26	0	16	0	0	16
M. setosissima Taub.^ab	Simon, M.F. 290	Brazil, Goiás	26	0	28	0	0	28
M. somnians Humb. & Bonpl. Ex Willd	Simon, M.F. 797	Brazil, Mato Grosso	26	0	41	0	0	41
M. somnians	Way, M.J. 2476	Brazil, Rio Grande do Norte	52	0	0	0	13	13
M. somnians	Grether, R. 2901	Mexico	52	0	0	0	71	71
M. somnians var. viscida (Willd.) Barneby^b	Simon, M.F. 863	Brazil, Goiás	26	0	45	0	0	45
M. splendida Barneby	Simon, M.F. 316	Brazil, Goiás	26	0	30	0	0	30
^aAlso analyzed with and without PDB pretreatment (see text and Table 2)^bAlso analyzed for seedling root size (for more details see text and Table 3)

Figure 2 Mitotic metaphases of Mimosa paposa (a diploid species) with (A) 26 chromosomes; (B) 52 chromosomes; (C) 104 chromosomes. Scale bar 10 μm.

Figure 3 Mitotic metaphases in Mimosa biucifera (a tetraploid species) with (A) 52 chromosomes and (B) 104 chromosomes. Scale bar 10 μm.

Figure 4 Mitotic metaphases in Mimosa incana (a tetraploid species) showing a 52-chromosome cell and a polysomatic 104-chromosome cell side-by-side in the same slide. Scale bar 10 μm.

Table 2. Percentage of polysomatic cells with and without PDB pretreatment in Mimosa species.

Species	2n	Polysomaty^∗
		Without PDB	With PDB
M. apodocarpa	26	52 (14.3)	52 (27.6); 104 (14)
M. diplotricha	26	52 (27.5)	52 (11.5)
M. echinocaula	26	52 (6.6)	52 (29.7)
M. foliolosa	26	52 (31.8); 78 (4.5)	52 (55.4)
M. heringeri	26	52 (20.6)	52 (36.5)
M. orthocarpa	26	52 (6.7)	52 (29)
M. orthocarpa	26	52 (37)	52 (10.3)
M. polyantha	26	52 (15)	52 (48.8)
M. scabrella	52	78 (13)	78 (37.5); 104 (4)
M. setosissima	26	52 (24.5)	52 (73.7)
^∗Chromosome number and (between brackets) percentage of cells.

Table 3. Percentage of polysomatic cells in different seedling root sizes of Mimosa species.

Species	Root size (mm) and polysomaty popopolysomapolpolysomat
	1–5 (%)	6–10 (%)	11–15 (%)
M. adenocarpa	30	0	0
M. apodocarpa	0	39	3
M. artemisiana	0	20	5
M. borealis	0	41	25
M. claussenii	0	15	10
M. diplotricha	7	0	0
M. echinocaula	0	14	13
M. foliolosa	41	0	0
M. goldmanii	0	42	6
M. heringeri	0	24	3
M. lacerata	0	54	33
M. luisana	0	29	6
M. monancistra	0	9	1
M. orthocarpa	18	0	0
M. papposa	0	47	2
M. pigra var. dehiscens	0	8	4
M. polyantha	21	0	0
M. polycarpa var. subandina	11	0	0
M. pudica	27	0	0
M. pudica var. hispida	7	0	0
M. scabrella	0	17	3
M. setosissima	28	0	0
M. somnians var. viscida	0	36	9

Figure 1 (A) Grown plants of Mimosa scabrella in the greenhouse; (B) detail of a grown plant with well-developed roots and (C) seedlings.

Dahmer , N , Simon , MF , Schifino-Wittmann , MT , Hughes , CE , Miotto , STS and Giuliani , JC . 2011 . Chromosome numbers in the genus Mimosa L.: Cytotaxonomic and evolutionary implications . Plant Syst Evol , 291 : 211 – 220 .

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