Seed production potential of <i>Echinochloa colona</i> exposed to sublethal doses of four commonly-used rice herbicides and high-temperature stress

Velasquez, Juan C.; Roma-Burgos, Nilda

doi:10.51694/AdvWeedSci/2024;42:00001

Acessibilidade / Reportar erro

Brasil

Español English

sumário « anterior atual seguinte »

Sumário

Research article - SPECIAL TOPICS 8th International Weed Science Congress – Weed Science in Climate of Change • Adv. Weed Sci. 42 • 2024 • https://doi.org/10.51694/AdvWeedSci/2024;42:00001 copy

Seed production potential of Echinochloa colona exposed to sublethal doses of four commonly-used rice herbicides and high-temperature stress

Authorship SCIMAGO INSTITUTIONS RANKINGS

Abstract:

Background:

Echinochloa colona (junglerice), a troublesome weed in rice, is resistant to 15 herbicide active ingredients. High temperatures are linked to reduction of herbicide efficacy.

Objective:

Evaluate growth and seed production of junglerice, after five generations of recurrent selection with sublethal dose of rice herbicides under heat stress.

Methods:

Junglerice plants previously subjected to recurrent selection with herbicides and heat stress for three cycles were exposed to further iterative cycles of selection with heat stress (45 °C) and sublethal dose of florpyrauxifen-benzyl (FPB, 0.125x), imazethapyr (0.125x), quinclorac (0.25x), and glufosinate (0.25x). Plant injury was evaluated 1 and 3 weeks after treatment. Panicle number; plant height; and dry biomass of shoot, panicles, and seeds were recorded. Seed number plant^-1 and reproductive effort were estimated.

Results:

The joint effect of heat stress and sublethal dose of herbicides reduced the sensitivity of junglerice to all herbicides tested. Plants treated with FPB and quinclorac produced more shoot biomass and seed number after five generations. Heat-stressed plants treated with FPB produced more seeds than non-stressed plants. Imazethapyr reduced seed production. Heat-stressed junglerice treated with glufosinate produced fewer seeds than non-stressed plants.

Conclusions:

The joint effect of heat stress and sublethal dose of herbicides reduced junglerice sensitivity to the four rice herbicides tested after five generations. Heat stress and sublethal dose of the relatively recent auxinic herbicide florpyrauxifen-benzyl reduced junglerice sensitivity and increased seed production.

Keywords:
Abiotic stress; Fecundity; Fitness penalty; Heat stress; Increased fitness; Recurrent selection; Weediness; Weed resistance

Seed line	Temp. regimen, day/night °C	Herbicide		Rate (g a.i. ha^-1)
Seed line	Temp. regimen, day/night °C	Active ingredient	Trade name	HRAC group	Iterative selection from G0 to G2¹ 1 Field population (G0) and the succeeding two generations (G1 and G2 plants) were selected with sublethal doses of commercial rate of the herbicides (Benedetti et al. 2020). G2 plants were cultured to produce G3 seeds. The selection cycle was continued with G3, G4, and G5 plants to produce G6 seeds. The parentheses represent the herbicide rate used in relation to the recommended commercial rate (1x): 30, 560, 648 and 216 g a.i. ha-1 (Loyant, Facet, Liberty, Newpath, respectively).	Iterative selection from G3 to G6¹ 1 Field population (G0) and the succeeding two generations (G1 and G2 plants) were selected with sublethal doses of commercial rate of the herbicides (Benedetti et al. 2020). G2 plants were cultured to produce G3 seeds. The selection cycle was continued with G3, G4, and G5 plants to produce G6 seeds. The parentheses represent the herbicide rate used in relation to the recommended commercial rate (1x): 30, 560, 648 and 216 g a.i. ha-1 (Loyant, Facet, Liberty, Newpath, respectively).
1	30/25	nontreated	-	-	-	-
2		florpyrauxifen-benzyl	Loyant	4	3.75	3.75 (0.125x)
3		quinclorac	Facet	4	54	140 (0.25x)
4		glufosinate-ammonium	Liberty 280 SL	10	56	162 (0.25x)
5		imazethapyr	Newpath	2	27	27 (0.125x)
6	45/25	nontreated	-	-	-	-
7		florpyrauxifen-benzyl	Loyant	4	3.75	3.75 (0.125x)
8		quinclorac	Facet	4	54	140 (0.25x)
9		glufosinate-ammonium	Liberty 280 SL	10	56	162 (0.25x)
10		imazethapyr	Newpath	2	27	27 (0.125x)

Herbicide¹ 1 See Table 1 for herbicides rates.	Temp.² 2 Temperature treatment for 7d prior and 7d after herbicide application. °C	Height (cm)						Shoot biomass (g)
Herbicide¹ 1 See Table 1 for herbicides rates.		G3³ 3 Generation 3 and 5, respectively. Means without the same letter are significantly different. Lowercase letters are used to compare means from interaction between herbicide and temperature within the same generation (columns). Uppercase letters are used to compare generation means within the same temperature and the same herbicide (rows). Means are separated based on Tukey's honest significant difference (HSD) test (α = 5%).			G5			G3			G5
non-treated	30	186.7	ab	B	199.5	a	A	79.7	abc	A	73.1	d	A
non-treated	45	201.3	ab	A	212.2	a	A	82.0	ab	B	126.6	a	A
florpyrauxifen-benzyl	30	161.5	cd	B	194.8	ab	A	40.0	e	B	87.0	bcd	A
florpyrauxifen-benzyl	45	189.3	b	A	179.2	bc	A	62.0	bcde	B	85.6	bcd	A
quinclorac	30	152.8	d	B	192.5	ab	A	64.1	bcde	B	101.1	bc	A
quinclorac	45	180.7	bc	B	199.4	a	A	56.0	cde	B	109.8	ab	A
glufosinate	30	169.3	bcd	B	201.0	a	A	53.6	de	B	74.4	d	A
glufosinate	45	162.3	cd	B	209.4	a	A	93.9	a	A	100.8	abc	A
imazethapyr	30	171.8	bcd	A	139.1	d	B	60.1	bcde	B	82.3	cd	A
imazethapyr	45	174.7	bc	A	166.3	c	A	77.5	abcd	B	97.3	bcd	A
Herbicide (H)⁴ 4 ANOVA at 95% of confidence level.		<.0001*						<.0001*
Temp. conditions (TC)		<.0001*						<.0001*
Generation (G)		<.0001*						<.0001*
H*TC		0.0525*						0.0002*
G*H		<.0001*						0.0003*
G*TC		0.1817						0.2513
HTCG		<.0001*						<.0001*

Herbicide¹ 1 See Table 1 for herbicides rates.	Temp.² 2 Temperature treatment for 7d prior and 7d after herbicide application. °C	Panicles plant^-1						Panicle biomass (g)
Herbicide¹ 1 See Table 1 for herbicides rates.		G3³ 3 Generation 3 and 5, respectively. Means without the same letter are significantly different. Lowercase letters are used to compare means from interaction between herbicide and temperature within the same generation (columns). Uppercase letters are used to compare generation means within the same temperature and the same herbicide (rows). Means are separated based on Tukey's honest significant difference (HSD) test (α = 5%).			G5			G3			G5
non-treated	30	92.7	abc	A	115.2	bc	A	6.6	a	A	3.1	bc	B
non-treated	45	68.3	c	B	118.7	bc	A	5.7	a	A	4.0	bc	B
florpyrauxifen-benzyl	30	78.7	bc	A	87.7	c	A	1.6	b	B	3.0	bc	A
florpyrauxifen-benzyl	45	85.0	abc	B	145.3	b	A	2.6	b	B	4.2	bc	A
quinclorac	30	94.5	abc	A	99.7	c	A	1.9	b	B	3.4	bc	A
quinclorac	45	68.3	c	B	78.4	c	A	2.6	b	B	7.6	a	A
glufosinate	30	115.3	ab	A	105.0	bc	A	3.1	b	A	2.7	bc	A
glufosinate	45	94.5	abc	A	207.3	a	A	3.0	b	A	2.4	bc	A
imazethapyr	30	121.3	ab	A	89.7	c	B	3.3	b	A	2.5	bc	A
imazethapyr	45	125.0	a	A	80.3	c	B	3.1	b	A	2.4	c	A
Herbicide (H)⁴ 4 ANOVA at 95% of confidence level.		0.0143*						<.0001*
Temp. conditions (TC)		0.1081						0.0004*
Generation (G)		<.0001*						0.3275
H*TC		<.0001*						<.0001*
G*H		<.0001*						<.0001*
G*TC		<.0001*						0.0021*
HTCG		<.0001*						0.0046*

Herbicide¹ 1 See Table 1 for herbicides rates.	Temp.² 2 Temperature treatment for 7d prior and 7d after herbicide application. °C	Seeds plant^-1						Seed biomass (g)
Herbicide¹ 1 See Table 1 for herbicides rates.		G3³ 3 Generation 3 and 5, respectively. Means without the same letter are significantly different. Lowercase letters are used to compare means from interaction between herbicide and temperature within the same generation (columns). Uppercase letters are used to compare generation means within the same temperature and the same herbicide (rows). Means are separated based on Tukey's honest significant difference (HSD) test (α = 5%).			G5			G3			G5
non-treated	30	19,357	abcd	A	18,899	de	A	27.9	abc	A	27.5	cd	A
non-treated	45	17,509	bcd	B	33,600	a	A	22.2	bc	B	43.8	a	A
florpyrauxifen-benzyl	30	15,457	d	B	22,454	cd	A	23.1	bc	B	30.1	bc	A
florpyrauxifen-benzyl	45	17,328	cd	B	29,908	ab	A	23.3	bc	B	42.2	a	A
quinclorac	30	15,386	d	B	25,385	bc	A	22.4	bc	B	37.1	ab	A
quinclorac	45	14,628	d	B	29,141	ab	A	21.5	c	B	41.6	a	A
glufosinate	30	24,295	a	A	27,206	bc	A	34.8	a	A	38.4	ab	A
glufosinate	45	20,487	abcd	A	16,804	de	A	30.1	ab	A	24.3	cd	B
imazethapyr	30	24,249	ab	A	16,190	e	B	31.2	ab	A	20.5	d	B
imazethapyr	45	21,553	abc	A	14,480	e	B	24.6	bc	A	18.8	d	B
Herbicide (H)⁴ 4 ANOVA at 95% of confidence level.		0.0097*						<.0001*
Temp. conditions (TC)		0.2772						0.0038*
Generation (G)		<.0001*						<.0001*
H*TC		<.0001*						0.2765
G*H		<.0001*						<.0001*
G*TC		0.0007*						<.0001*
HTCG		<.0001*						<.0001*

Herbicide¹ 1 See Table 1 for herbicides rates.	Temp.² 2 Temperature treatment for 7d prior and 7d after herbicide application. Conditions	Reproductive effort (%)
Herbicide¹ 1 See Table 1 for herbicides rates.		G3³ 3 Generation 3 and 5, respectively. Means without the same letter are significantly different. Lowercase letters are used to compare means from interaction between herbicide and temperature within the same generation (columns). Uppercase letters are used to compare generation means within the same temperature and the same herbicide (rows). Means are separated based on Tukey's honest significant difference (HSD) test (α = 5%).			G5
non-treated	30	24.6	cde	A	27.6	abc	A
non-treated	45	20.4	e	B	25.3	cd	A
florpyrauxifen-benzyl	30	36.0	ab	A	25.7	bc	B
florpyrauxifen-benzyl	45	26.5	cde	B	31.5	ab	A
quinclorac	30	25.5	cde	A	26.9	bc	A
quinclorac	45	26.9	cd	A	26.3	bc	A
glufosinate	30	38.1	a	A	33.5	a	B
glufosinate	45	23.8	de	A	19.2	de	B
imazethapyr	30	30.6	bc	A	19.5	de	B
imazethapyr	45	23.5	de	A	16.0	e	B
Herbicide (H)⁴ 4 ANOVA at 95% of confidence level.		<.0001*
Temp. conditions (TC)		<.0001*
Generation (G)		<.0001*
H*TC		<.0001*
G*H		<.0001*
G*TC		0.0011*
HTCG		0.0002*

Sociedade Brasileira da Ciência das Plantas Daninhas - SBCPD Rua Santa Catarina, 50, sala 1302 , 86010-470 - Londrina - Paraná / Brasil , +55 (51) 3308-6006 - Londrina - PR - Brazil
E-mail: sbcpd@sbcpd.org

Acompanhe os números deste periódico no seu leitor de RSS

[1] *Corresponding author: <nburgos@uark.edu>