Germination in seeds of <i>Abrus precatorius</i> L., a species with antileishmanial activity

Silva, Monalisa Alves Diniz da; Silva, Joyce Naiara da; Rocha, Ana Karlla Penna; Araújo, Ariana Veras de; Gonçalves, Edilma Pereira; Viana, Jeandson Silva

doi:10.5935/1806-6690.20250045

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Scientific Article • Rev. Ciênc. Agron. 56 • 2025 • https://doi.org/10.5935/1806-6690.20250045 linkcopy

Germination in seeds of Abrus precatorius L., a species with antileishmanial activity¹

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Abrus precatorius L. has been the subject of research to develop drugs with improved therapeutic profiles for the treatment of infectious diseases such as visceral leishmaniasis, which has very high mortality. Commercial cultivation is necessary to meet the demands of the pharmaceutical industry; however, cultivation can be hampered by the presence of integumentary dormancy in the seeds. The aim of this study was to evaluate the effects of different pre-germination treatments and different temperatures on germination in seeds of A. precatorius. The experiment was completely randomised in a 4 x 3 factorial scheme corresponding to four methods for breaking dormancy (intact seeds - T1; immersion in sulphuric acid for 30 minutes - T2; immersion in sulphuric acid for 45 minutes - T3; immersion in 20% caustic soda for 60 minutes - T4) and three temperatures during the germination process (25 °C; 30 °C; 35 °C). At 25 °C and 30 °C, chemical scarification with caustic soda results in a lower rate of germination compared to scarification with sulphuric acid, while at 35 °C, germination was higher. The seeds of A. precatorius show higher germination at 30 °C when previously immersed in sulphuric acid for 30 or 45 minutes. This information is important for viable commercial cultivation.

Keywords:
Integumentary dormancy; Pre-germination treatments; Temperature; Plants with antileishmanial activity

SV	DF	Mean Square
SV	DF	GP (%)	GSI	MGT (days)	PHS (%)	PDS (%)
Treatment	2	288.02**	0.81**	2.46**	1363.02**	1758.33**
MBD	3	1313.02**	1.62**	1.92**	2192.18**	329.16**
T x MBD	6	1004.68**	0.94**	0.31^ns	471.35**	114.58**
Residual	36	21.01	0.02	0.20	20.65	17.36
Total	47
CV (%)		12.19	16.70	20.57	11.89	17.24

		GP (%)
Temperature (ºC)		Methods for Overcoming Dormancy
Temperature (ºC)	T1	T2	T3	T4
25	20 Ab	51 Ba	44 Ba	26 Cb
30	20 Ac	60 Aa	54 Aa	36 Bb
35	26 Ac	23 Cc	31 Cb	60 Aa
GSI
25	0.35 Bb	1.07 Ba	1.15 Ba	0.55 Bb
30	0.41 Bc	1.86 Aa	1.87 Aa	0.79 Bb
35	0.72 Ab	0.72 Cb	0.95 Bb	1.59 Aa

Temperature (ºC)	MGT (days)
25	2.57 a
30	2.21 a
35	1.78 b
Methods for Overcoming Dormancy
T1	2.66 a
T2	1.98 bc
T3	1.76 c
T4	2.36 ab

		PHS (%)
Temperature (ºC)		Methods for Overcoming Dormancy
Temperature (ºC)	T1	T2	T3	T4
25	65 Aa	36 Ac	31 Ac	56 Ab
30	61 Aa	25 Bc	21 Bc	48 Bb
35	44 Ba	34 Ab	24 Abc	14 Cd
PDS (%)
25	15 Bb	13 Bb	25 Ba	17 Bab
30	19 Bab	15 Bb	25 Ba	17 Bb
35	30 Ab	44 Aa	45 Aa	26 Ab

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[TFN1] **Significant at 1%; * significant at 5%; ^ns not significant; coefficient of variation (CV)

Germination in seeds of Abrus precatorius L., a species with antileishmanial activity1

Germination in seeds of Abrus precatorius L., a species with antileishmanial activity¹