Effect of fungal incidence on physiological quality of tobacco seeds used in Brazil

Ishizuka, Mariane Sayuri; Moraes, Maria Heloisa Duarte de; Chamma, Maria Helena Carmignani Pescarin; Pulcinelli, Carlos Eduardo; Menten, José Otavio Machado

doi:10.1590/1808-1657000352017

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SCIENTIFIC COMMUNICATION • Arq. Inst. Biol. 85 • 2018 • https://doi.org/10.1590/1808-1657000352017 copy

Effect of fungal incidence on physiological quality of tobacco seeds used in Brazil

Efeito da incidência de fungos na qualidade fisiológica de sementes de tabaco utilizadas no Brasil

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT:

The objectives of the present project were to evaluate the sanity and germination of tobacco seed samples cultivated in Brazil and to identify potential pathogenic fungi to the culture. Thirty-four representatives samples of tobacco seeds were evaluated through germination and sanity test by the blotter-test. On the germination test, results were expressed in percentage of seedlings considered normal, abnormal and non-germinated seeds. The percentage of seeds germination varied between 54.5 and 90%. According to sanity test, it was verified the incidence of Alternaria alternata, Cladosporium spp., Fusarium spp., and Phoma spp. The incidence of A. alternata varied from 3 to 67%, and Fusarium spp. varied from 0 to 19%. There was significative positive correlation between the incidence of A. alternata and the percentage of seed germination. Species of Alternaria and Fusarium can be potential pathogens to tobacco culture and an alarm for the necessity of seed treatment of the seeds that are transporting these fungi.

KEYWORDS:
germination; symptoms; Alternaria alternata; Fusarium spp

Cultivar	Lot	Alternaria alternata	Fusarium spp.	Cladosporium spp.
CSC 439¹	160	67 a *	6 c	17 a
CSC 439¹	67	35 c	15 a	10 b
CSC 463¹	178	66 a	2 d	11 b
CSC 463¹	99	17 d	1 d	4 c
CSC 447¹	166	48 b	2 d	15 a
CSC 447¹	55	23 d	11 b	4 c
CSC 416¹	63	43 b	6 c	18 a
CSC 416¹	47	34 c	19 a	13 b
CSC 467¹	127	37 c	3 d	11 b
CSC 467¹	124	22 d	6 c	6 c
CSC 404¹	179	37 c	3 d	12 b
CSC 404¹	100	31 c	8 b	7 c
CSC 454¹	177	36 c	2 d	11 b
CSC 454¹	103	30 c	5 c	8 c
CSC 4704¹	107	36 c	13 b	5 c
CSC 4704¹	28	25 d	5 c	6 c
CSC 497¹	92	36 c	2 d	7 c
CSC 497¹	89	27 d	1 d	2 c
CSC 444¹	115	31 c	11 b	11 b
CSC 444¹	50	21 d	12 b	16 a
CSC 401¹	45	30 c	16 a	18 a
CSC 401¹	44	28 d	7 c	12 b
CSC 4703¹	34	30 c	9 b	4 c
CSC 4703¹	97	24 d	1 d	7 c
CSC 405¹	120	25 d	5 c	5 c
BAT 2301²	163	24 d	1 d	14 b
CSC 2305²	167	24 d	6 d	7 c
CSC 2305²	192	9 f	5 d	2 c
CSC 221²	54	16 e	0 d	2 c
CSC 221²	29	13 e	6 c	3 c
CSC 254²	126	5 f	1 d	6 c
CSC 254²	102	3 f	0 d	0 c
BAT 2101²	59	4 f	4 c	4 c
BAT 2101²	26	12 e	5 c	7 c
CV (%)		18,34	55,29	43,30

Cultivar	Lot	FC%	G%	AS%				DS%
Cultivar	Lot	FC%	G%	Total	Alt	Fus	DEF	Total	Alt	Fus	SWF
CSC 439¹	160	41 c	52 e	10 a	0 b	4 a	6 a	38 a	32 a	3 d	4 c
CSC 439¹	67	54 b	69 c	6 b	3 b	1 b	2 a	25 b	20 b	18 a	4 c
CSC 463¹	178	39 c	54 c	12 a	1 b	6 a	5 a	41 a	34 a	3 d	5 c
CSC 463¹	99	55 b	65 c	5 b	1 b	1 b	4 a	30 b	4 d	6 c	18 a
CSC 447¹	166	55 b	75 b	10 a	0 b	6 a	4 a	15 c	14 c	2 d	3 c
CSC 447¹	55	84 a	90 a	3 b	2 b	1 b	1 a	7 d	2 d	4 c	1 c
CSC 416¹	63	47 c	61 d	13 a	1 b	8 a	4 a	26 b	22 b	4 c	3 c
CSC 416¹	47	46 c	70 c	6 b	4 a	1 b	2 a	24 b	14 c	19 a	3 c
CSC 467¹	127	57 b	63 c	12 a	1 b	9 a	3 a	25 b	18 c	4 c	6 c
CSC 467¹	124	56 b	79 b	8 b	2 b	2 a	4 a	13 c	6 a	9 b	2 c
CSC 404¹	179	70 a	72 b	9 b	0 b	2 a	4 a	19 c	10 c	1 d	8 b
CSC 404¹	100	63,5 b	79 b	4 b	1 b	2 a	1 a	17 c	12 c	6 c	2 c
CSC 454¹	177	56,5 b	76 b	6 b	0 b	2 a	4 a	18 c	13 c	2 d	14 a
CSC 454¹	103	61,5 b	79 b	7 b	1 b	3 a	2 a	14 c	10 c	4 c	4 c
CSC 4704¹	107	53 b	73 b	13 a	2 b	3 a	8 a	14 c	9 c	7 c	4 c
CSC 4704¹	28	65,5 a	83 b	8 b	3 b	1 b	4 a	9 d	2 d	3 d	6 c
CSC 497¹	92	40,5 c	67 c	8 b	0 b	5 a	3 a	25 b	14 c	2 d	10 b
CSC 497¹	89	34,5 c	55 c	13 a	1 b	4 a	8 a	32 a	12 c	1 d	18 a
CSC 444¹	115	71 a	82 a	4 b	1 b	1 b	2 a	14 c	2 d	6 c	6 c
CSC 444¹	50	72 a	81 a	6 b	1 b	2 a	3 a	14 c	9 c	6 c	3 c
CSC 401¹	45	54,5 b	70 c	9 a	3 b	2 a	4 a	21 b	10 c	12 b	2 c
CSC 401¹	44	67 a	74 b	8 b	4 a	2 a	2 a	18 c	8 d	13 b	2 c
CSC 4703¹	34	29 c	71 c	12 a	4 a	4 a	4 a	17 c	10 c	10 b	3 c
CSC 4703¹	97	28 c	77 b	12 a	5 a	4 a	4 a	11 c	6 d	4 c	2 c
CSC 405¹	120	52 c	75 b	14 a	4 a	6 a	4 a	11 c	6 d	4 c	4 c
BAT 2301²	163	49 c	61 c	8 b	0 b	2 a	6 a	31 a	14 c	1 d	17 a
BAT 2301²	26	57 b	78 b	10 a	4 a	2 a	4 a	12 c	4 d	6 c	2 c
CSC 2305²	167	57 b	59 d	13 a	6 a	1 b	6 a	28 a	13 c	1 d	14 a
CSC 2305²	192	50 c	74 b	12 a	3 b	0 b	9 a	14 c	4 d	0 d	10 b
CSC 221²	54	33 c	84 a	6 b	2 b	2 a	2 a	10 c	3 d	4 c	3 c
CSC 221²	29	44 c	69 c	12 a	2 b	2 a	8 a	19 c	3 d	7 c	9 b
CSC 254²	126	71 a	87 a	7 b	1 b	0 b	6 a	6 d	1 d	1 d	6 c
CSC 254²	102	75 a	84 a	4 b	0 b	0 b	4 a	12 c	1 d	0 d	10 b
BAT 2101²	59	53 b	71 c	16 a	6 a	2 a	10 a	13 c	6 d	4 d	6 c
Mean		53,3 b	71,3 a	4,6 b	1,8 b	2,9 a	4,2 a	19,6 c	10,3 c	5,3 c	6 c
CV (%)		23,92	9,72	52,38	67,40	89,34	75,17	30,29	45,69	44,80	43,80

Incidence on seeds	FC	Germination	Abnormal seedlings	Dead seeds
Alternaria alternata	-0.2554	-0.5001**	0.1165	0.5655**
Fusarium spp.	0.0059	0.1731	-0.3220	-0.0932

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[1] *Corresponding author: marianeishizuka@yahoo.com.br