Meiotic Behavior and Pollen Viability of <i>Spondias mombin</i> L.: Native Fruit Species of the Amazon

Zortéa, Kelli Évelin Müller; Rossi, Ana Aparecida Bandini; Bispo, Rosimeire Barboza; Rocha, Vinícius Delgado da; Hoogerheide, Eulalia Soler Sobreira

doi:10.1590/2179-8087.037518

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Original Article, Conservation of Nature • Floresta Ambient. 26 (3) • 2019 • https://doi.org/10.1590/2179-8087.037518 copy

Meiotic Behavior and Pollen Viability of Spondias mombin L.: Native Fruit Species of the Amazon

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

Spondias mombin L. is a fruit species native to the Amazon with great marketing potential. The aim of this study was to examine the meiotic behavior and pollen viability of S. mombin. Flower buds at various developmental stages were collected for analyses of pollen viability, in vitro germination, and meiotic behavior. S. mombin is diploid with 2n = 2x = 30 chromosomes. Meiosis showed to be regular, with only 13.3% of cells with abnormal division. A high meiotic index was found: 96.5%. Pollen viability did not differ between male (96.3%) and bisexual (96.7%) flowers, and the overall mean of viable pollen was considered high (96.5%). Pollen germination occurred in all tested media, with the treatment containing 20% sucrose and 50 mg mL^‒1 boric acid being the most suitable. The highest pollen germination means occurred after 36 h of incubation. The obtained information can be used in the planning and implementation of commercial crops of the species.

Keywords:
cajá; pollen fertility; pollen germination; meiotic index

Individual	Tetrads	Monads	Dyads	Triads	Polyads	MI (%)
1	1,936	0	0	54	10	96.8 abc
2	1,960	0	0	30	10	98.0 ab
3	1,969	0	0	22	9	98.4 a
4	1,910	1	1	85	3	95.5 c
5	1,912	4	1	76	7	95.6 c
6	1,935	3	0	61	1	96.7 abc
7	1,906	19	0	53	22	95.3 c
8	1,916	6	0	77	1	95.8 bc
Total	15,444	33	2	458	63	16,000
Mean	1,930.5	4.1	0.2	57.2	7.9	96.5
CV (%)	1.78

Individual	Male flower	Bisexual flower	Mean in both floral types
1	96.1 ab	97.5 a	96.8 ab
2	96.8 ab	96.9 ab	96.9 ab
3	97.0 ab	96.4 ab	96.7 abc
4	97.1 ab	98.4 a	97.8 a
5	94.8 ab	93.6 b	94.2 c
6	98.1 a	97.5 a	97.8 a
7	95.4 ab	97.3 a	96.3 abc
8	94.5 b	95.8 ab	95.1 bc
Mean	96.3	96.7	96.5
CV (%)			2.38

Treatment	Incubation period			PTL (μm) after 36 h
Treatment	12 h	24 h	36 h	PTL (μm) after 36 h
T1 (0% S and 0 mg BA)	26.1 Aa	34.4 Ab	32.8 Ac	171.0 b
T2 (0% S and 50 mg BA)	16.5 Ba	27.1 Bb	80.5 Ab	277.4 a
T3 (5% S and 0 mg BA)	27.1 Aa	23.4 Ab	30.1 Ac	239.0 ab
T4 (5% S and 50 mg BA)	22.4 Ba	34.4 Bb	89.5 Aa	276.2 a
T5 (10% S and 0 mg BA)	19.3 Aa	25.4 Ab	26.4 Ac	250.3 a
T6 (10% S and 50 mg BA)	18.4 Aa	25.3 Ab	27.1 Ac	310.4 a
T7 (20% S and 0 mg BA)	21.6 Ba	31.0 Bb	74.8 Ab	259.9 a
T8 (20% S and 50 mg BA)	38.1 Ca	54.8 Ba	95.3 Aa	311.6 a
CV (%)	18.42			21.53

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[1] Kelli Évelin Müller ZortéaDepartamento de Ciências Biológicas, Universidade do Estado de Mato Grosso – UNEMAT, Avenida Perimetral Rogério Silva, s/n, Bairro Flamboyant, CEP 78580-000, Alta Floresta, MT, Brasil. e-mail: kellimuller@hotmail.com