<i>Odontadenia lutea</i> (Apocynaceae) LEAVES: PHYTOCHEMICAL STUDY AND INSECTICIDAL ACTIVITY AGAINST LEAF-CUTTING ANTS <i>Atta sexdens rubropilosa</i> Forel

Silva Junior, Weber M. da; Santos, Renato G.; Duarte, Geane K. G. F.; Cunha, Gracielle O. S.; Silva, Daniela M. da; Marchesin, Thais F. R.; Bueno, Odair C.; Menezes, Antônio Carlos S.

doi:10.21577/0100-4042.20170641

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Artigo • Quím. Nova 44 (1) • Jan 2021 • https://doi.org/10.21577/0100-4042.20170641 copy

Odontadenia lutea (Apocynaceae) LEAVES: PHYTOCHEMICAL STUDY AND INSECTICIDAL ACTIVITY AGAINST LEAF-CUTTING ANTS Atta sexdens rubropilosa Forel

Authorship SCIMAGO INSTITUTIONS RANKINGS

The present work describes the chemical constituents of Odontadenia lutea (Vell.) Markgr. leaves and the toxicities of its extract and fractions against Atta sexdens rubropilosa Forel (Hymenoptera: Formicidae). Chromatographic procedures of the ethanolic extract resulted in the identification of the triterpene β-amyrin, the flavonoid rutin, two fatty acids palmitic and linolenic, and one glyceroglycolipid 3-O-(9,12,15-octadecatrienoyl)-glyceryl-β-D-galactopyranoside, which are known compounds, but they are described for the first time in the Odontadenia genus. The known triterpenes lupeol and α-amyrin were also identified. Structural identification of the compounds was performed by analysis of IR, ESI-MS, and 1D and 2D NMR spectra. The toxicity of its extract and fractions from O. lutea leaves was tested against leaf-cutting ants Atta sexdens rubropilosa Forel by employing ingestion bioassay procedures. The hexane fraction (2 mg mL^-1) decreases the average survival of ants from sixteen to six days, causing 98% mortality on the 14th day and 100% at the end of the experiment.

Keywords:
triterpenes; cutting ants; Odontadenia lutea; monogalactosy lmonoacylglycerol; Apocynaceae

Position	3a
Position	δ_H (mult., J in Hz)	δ_C
1	3.56 (m)	62.6
2	3.67 (m)	69.7
3	4.09 (dd, 11.3 and 6.2)	65.0
	4.17 (dd, 11.9 and 4.5)
1'	4.24 (d, 7.8)	103.9
2'	3.47-4.01 (m)	71.1
3'	3.47-4.01 (m)	75.3
4'	3.47-4.01 (m)	68.8
5'	3.47-4.01 (m)	73.4
6'	3.47-4.01 (m)	61.0
1''	-	174.0
2''	2.37 (t, 7.6)	33.5
3''	1.63 (m)	24.5
4''	1.31-1.35 (m)	29.3
5''	1.31-1.35 (m)	29.3
6''	1.31-1.35 (m)	29.2
7''	1.31-1.35 (m)	29.2
8''	2.10 (m)	26.7
9''	5.30-5.39 (m)	127.8
10''	5.30-5.39 (m)	126.8
11''	2.83 (t, 6.0)	25.1
12''	5.30-5.39 (m)	127.4
13''	5.30-5.39 (m)	127.4
14''	2.83 (t, 6.0)	29.4
15''	5.30-5.39 (m)	129.6
16''	5.30-5.39 (m)	131.3
17''	2.10 (m)	26.7
18''	0.99 (t, 7.5)	13.0

Treatment (mg mL^-1)		Accumulated percentage of mortality per day										MD * (days)
Treatment (mg mL^-1)		1	2	3	6	8	10	14	17	21	25	MD * (days)
OLFE	Diet Control	0	0	0	4	4	10	14	16	20	26	>25a
	0.2	0	2	2	6	14	18	26	30	50	52	22b
	1.0	0	0	2	14	16	18	20	28	42	42	>25a
	2.0	2	2	2	16	28	40	42	44	50	52	20b
OLFEH	Diet Control	0	0	0	8	18	28	46	52	56	58	16a
	0.2	0	0	0	10	16	20	32	34	40	42	>25a
	1.0	0	0	0	16	30	42	64	78	82	84	12b
	2.0	0	0	0	52	66	90	98	98	98	100	6b
OLFED	Diet Control	0	0	0	2	2	14	38	44	46	52	24a
	0.2	0	0	4	8	12	20	30	50	52	64	17a
	1.0	0	0	8	22	26	30	54	58	60	78	14b
	2.0	0	0	10	26	28	36	58	74	76	80	13b
OLFEA	Diet Control	0	0	0	8	18	28	46	52	56	58	16a
	0.2	0	0	2	12	20	24	32	38	42	44	>25a
	1.0	0	0	0	2	22	32	60	66	68	68	14b
	2.0	0	0	0	8	20	38	54	64	68	70	13b
OLFEM	Diet Control	0	0	0	2	2	14	38	44	46	52	24a
	0.2	0	2	2	8	10	14	24	30	32	48	>25a
	1.0	0	2	2	10	10	18	36	58	60	72	15a
	2.0	0	2	2	8	12	18	46	58	58	66	15a

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[1] *e-mail: antonio.menezes@ueg.br