Iron Toxicity Tolerance of Rice Genotypes in Relation to Growth, Yield and Physiochemical Characters

doi:10.1016/j.rsci.2023.02.002

摘要/Abstract

. [J]. Rice Science, 2023, 30(4): 321-334.

图/表 6

参考文献 62

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Factor	Final germination (%)	Germination energy (%)	Mean germination time (d)	Germination rate index (seed/d)	Root length (cm)	Shoot length (cm)	Seedling vigor index
Genotype (G)
RD31	82.1 ± 1.4 f	64.8 ± 1.4 f	4.8 ± 0.03 a	55.0 ± 1.0 g	2.5 ± 0.1 b	5.3 ± 0.2 d	679.1 ± 23.9 ef
RD41	83.9 ± 1.4 ef	72.2 ± 1.7 de	4.8 ± 0.02 b	58.4 ± 1.0 ef	1.9 ± 0.1 de	5.5 ± 0.1 cd	644.8 ± 20.7 f
RD57	85.4 ± 1.4 de	71.7 ± 1.4 de	4.6 ± 0.03 ef	61.7 ± 1.1 d	2.7 ± 0.2 ab	5.6 ± 0.2 bc	733.0 ± 17.1 cd
RD71	85.4 ± 1.5 de	67.4 ± 1.2 f	4.8 ± 0.03 bc	57.5 ± 1.1 f	2.0 ± 0.1 cd	4.9 ± 0.1 e	603.3 ± 18.1 g
RD77	86.9 ± 1.3 cd	74.1 ± 1.3 cd	4.7 ± 0.01 de	61.3 ± 0.8 d	2.1 ± 0.1 cd	5.8 ± 0.1 b	702.3 ± 17.5 de
RD79	83.6 ± 1.1 ef	70.7 ± 1.3 e	4.7 ± 0.03 cd	58.7 ± 1.0 ef	2.2 ± 0.1 c	5.3 ± 0.1 d	651.2 ± 14.0 f
RD85	91.9 ± 0.9 a	88.0 ± 0.9 a	4.5 ± 0.01 h	73.6 ± 0.6 a	2.7 ± 0.1 ab	6.5 ± 0.1 a	851.0 ± 11.4 a
RD87	88.5 ± 1.1 bc	81.0 ± 1.0 b	4.5 ± 0.02 h	69.4 ± 0.6 b	2.8 ± 0.1 a	5.9 ± 0.1 b	771.6 ± 17.7 b
RD35	89.7 ± 1.0 ab	83.6 ± 1.3 b	4.6 ± 0.03 fg	66.8 ± 0.9 c	1.9 ± 0.1 de	6.3 ± 0.1 a	750.7 ± 12.4 bc
Azucena	85.9 ± 1.4 cde	75.0 ± 1.5 c	4.7 ± 0.02 cd	59.1 ± 0.9 ef	2.8 ± 0.1 ab	5.5 ± 0.1 cd	728.7 ± 15.1 cd
IR64	78.3 ± 1.3 g	73.2 ± 1.3 cde	4.6 ± 0.02 g	60.4 ± 1.0 de	1.8 ± 0.1 e	4.8 ± 0.1 e	554.7 ± 13.2 h
Fe level (Fe, mg/L)
0 (control)	92.9 ± 1.2 a	92.9 ± 1.3 a	4.4 ± 0.01 d	78.8 ± 0.9 a	3.2 ± 0.1 b	7.0 ± 0.1 b	950.5 ± 21.9 b
150	90.6 ± 1.4 b	90.6 ± 1.4 b	4.4 ± 0.01 d	76.5 ± 1.1 b	3.7 ± 0.1 a	7.5 ± 0.1 a	1 014.0 ± 24.2 a
300	88.4 ± 1.1 c	75.9 ± 1.2 c	4.6 ± 0.02 c	62.9 ± 0.8 c	2.2 ± 0.1 c	5.5 ± 0.1 c	684.9 ± 14.1 c
600	84.0 ± 1.1 d	65.5 ± 1.2 d	4.8 ± 0.03 b	53.4 ± 0.8 d	1.4 ± 0.1 d	4.6 ± 0.1 d	516.1 ± 11.6 d
900	72.1 ± 1.4 e	48.6 ± 1.4 e	5.1 ± 0.04 a	38.3 ± 0.9 e	1.1 ± 0.1 e	3.3 ± 0.1 e	321.0 ± 10.6 e
G	**	**	**	**	**	**	**
Fe	**	**	**	**	**	**	**
G × Fe	**	**	**	**	**	**	**

Factor	Final germination (%)	Germination energy (%)	Mean germination time (d)	Germination rate index (seed/d)	Root length (cm)	Shoot length (cm)	Seedling vigor index
Genotype (G)
RD31	82.1 ± 1.4 f	64.8 ± 1.4 f	4.8 ± 0.03 a	55.0 ± 1.0 g	2.5 ± 0.1 b	5.3 ± 0.2 d	679.1 ± 23.9 ef
RD41	83.9 ± 1.4 ef	72.2 ± 1.7 de	4.8 ± 0.02 b	58.4 ± 1.0 ef	1.9 ± 0.1 de	5.5 ± 0.1 cd	644.8 ± 20.7 f
RD57	85.4 ± 1.4 de	71.7 ± 1.4 de	4.6 ± 0.03 ef	61.7 ± 1.1 d	2.7 ± 0.2 ab	5.6 ± 0.2 bc	733.0 ± 17.1 cd
RD71	85.4 ± 1.5 de	67.4 ± 1.2 f	4.8 ± 0.03 bc	57.5 ± 1.1 f	2.0 ± 0.1 cd	4.9 ± 0.1 e	603.3 ± 18.1 g
RD77	86.9 ± 1.3 cd	74.1 ± 1.3 cd	4.7 ± 0.01 de	61.3 ± 0.8 d	2.1 ± 0.1 cd	5.8 ± 0.1 b	702.3 ± 17.5 de
RD79	83.6 ± 1.1 ef	70.7 ± 1.3 e	4.7 ± 0.03 cd	58.7 ± 1.0 ef	2.2 ± 0.1 c	5.3 ± 0.1 d	651.2 ± 14.0 f
RD85	91.9 ± 0.9 a	88.0 ± 0.9 a	4.5 ± 0.01 h	73.6 ± 0.6 a	2.7 ± 0.1 ab	6.5 ± 0.1 a	851.0 ± 11.4 a
RD87	88.5 ± 1.1 bc	81.0 ± 1.0 b	4.5 ± 0.02 h	69.4 ± 0.6 b	2.8 ± 0.1 a	5.9 ± 0.1 b	771.6 ± 17.7 b
RD35	89.7 ± 1.0 ab	83.6 ± 1.3 b	4.6 ± 0.03 fg	66.8 ± 0.9 c	1.9 ± 0.1 de	6.3 ± 0.1 a	750.7 ± 12.4 bc
Azucena	85.9 ± 1.4 cde	75.0 ± 1.5 c	4.7 ± 0.02 cd	59.1 ± 0.9 ef	2.8 ± 0.1 ab	5.5 ± 0.1 cd	728.7 ± 15.1 cd
IR64	78.3 ± 1.3 g	73.2 ± 1.3 cde	4.6 ± 0.02 g	60.4 ± 1.0 de	1.8 ± 0.1 e	4.8 ± 0.1 e	554.7 ± 13.2 h
Fe level (Fe, mg/L)
0 (control)	92.9 ± 1.2 a	92.9 ± 1.3 a	4.4 ± 0.01 d	78.8 ± 0.9 a	3.2 ± 0.1 b	7.0 ± 0.1 b	950.5 ± 21.9 b
150	90.6 ± 1.4 b	90.6 ± 1.4 b	4.4 ± 0.01 d	76.5 ± 1.1 b	3.7 ± 0.1 a	7.5 ± 0.1 a	1 014.0 ± 24.2 a
300	88.4 ± 1.1 c	75.9 ± 1.2 c	4.6 ± 0.02 c	62.9 ± 0.8 c	2.2 ± 0.1 c	5.5 ± 0.1 c	684.9 ± 14.1 c
600	84.0 ± 1.1 d	65.5 ± 1.2 d	4.8 ± 0.03 b	53.4 ± 0.8 d	1.4 ± 0.1 d	4.6 ± 0.1 d	516.1 ± 11.6 d
900	72.1 ± 1.4 e	48.6 ± 1.4 e	5.1 ± 0.04 a	38.3 ± 0.9 e	1.1 ± 0.1 e	3.3 ± 0.1 e	321.0 ± 10.6 e
G	**	**	**	**	**	**	**
Fe	**	**	**	**	**	**	**
G × Fe	**	**	**	**	**	**	**

Factor	Plant height (cm)		Root length (m)		Shoot dry matter (g/plant)	Root dry matter (g/plant)		Tiller number per plant	Panicle number per plant		Filled grain ratio (%)	1000-grain weight (g)		Grain yield (g/plant)
Genotype (G)
RD31	92.1 ± 1.9 bc		128.9 ± 6.4 a		86.5 ± 3.0 bc	13.3 ± 0.5 cd		23.6 ± 0.6 ab	16.6 ± 0.7 ab		78.6 ± 0.2 gh	16.8 ± 0.7 cd		19.1 ± 1.1 c
RD41	90.6 ± 3.6 bc		129.1 ± 6.2 a		71.9 ± 1.8 d	13.4 ± 0.7 cd		19.7 ± 0.5 d	14.1 ± 0.8 cd		81.6 ± 0.1 cde	19.0 ± 0.8 ab		19.4 ± 1.2 c
RD57	93.5 ± 2.0 b		127.2 ± 7.7 a		84.3 ± 1.4 c	12.0 ± 1.2 d		22.4 ± 0.5 bc	16.5 ± 0.8 ab		79.2 ± 0.1 fgh	18.3 ± 0.3 b		18.8 ± 1.0 c
RD71	91.7 ± 1.7 bc		125.4 ± 7.7 a		73.3 ± 1.3 d	13.0 ± 0.5 cd		21.4 ± 0.5 bcd	14.8 ± 0.9 bcd		81.2 ± 0.1 def	19.2 ± 0.7 ab		20.5 ± 0.8 bc
RD77	90.1 ± 2.7 bcd		121.4 ± 6.7 a		69.1 ± 2.3 de	11.6 ± 0.7 d		22.1 ± 0.8 bc	16.4 ± 0.8 ab		78.9 ± 0.2 gh	18.8 ± 0.4 ab		20.6 ± 0.8 bc
RD79	90.9 ± 2.4 bc		121.4 ± 6.8 a		90.1 ± 2.0 b	13.8 ± 0.6 bcd		21.7 ± 0.8 bcd	16.1 ± 1.2 abc		80.3 ± 0.4 efg	18.8 ± 0.4 b		20.9 ± 0.8 bc
RD85	84.8 ± 1.0 d		125.9 ± 4.4 a		68.5 ± 2.1 de	17.2 ± 1.1 a		22.2 ± 0.7 bc	17.1 ± 0.7 a		84.9 ± 0.3 b	20.3 ± 0.5 a		23.5 ± 0.8 a
RD87	87.9 ± 2.8 cd		120.1 ± 6.9 a		73.5 ± 1.8 d	15.9 ± 1.4 ab		21.0 ± 0.7 cd	15.0 ± 1.1 bc		82.9 ± 0.1 bcd	19.5 ± 0.8 ab		21.8 ± 0.5 ab
RD35	88.4 ± 3.4 bcd		128.9 ± 8.0 a		69.9 ± 1.0 de	16.2 ± 0.5 a		23.3 ± 0.8 zb	15.2 ± 0.9 abc		83.6 ± 0.3 bc	18.2 ± 0.5 bc		22.4 ± 0.8 ab
Azucena	129.3 ± 2.7 a		120.3 ± 10.2 a		106.3 ± 1.8 a	15.0 ± 0.6 abc		11.3 ± 0.5 e	7.0 ± 0.3 e		93.7 ± 0.1 a	18.8 ± 0.6 ab		16.4 ± 0.6 d
IR64	76.0 ± 1.6 e		126.7 ± 7.0 a		64.6 ± 4.0 e	16.5 ± 0.9 a		24.7 ± 1.0 a	13.0 ± 1.1 d		78.0 ± 0.2 h	16.5 ± 0.5 d		19.0 ± 1.0 c
Fe level (Fe, mg/L)
0 (control)	92.1 ± 2.2 ab		121.1 ± 8.8 c		80.9 ± 1.6 c	13.7 ± 0.8 c		21.5 ± 0.7 bc	15.5 ± 0.8 b		81.3 ± 0.8 bc	18.8 ± 0.4 c		21.0 ± 0.9 c
150	94.3 ± 2.8 a		134.6 ± 5.6 b		89.6 ± 1.5 b	17.5 ± 0.7 b		22.5 ± 0.7 ab	16.9 ± 0.9 a		83.0 ± 1.2 ab	19.9 ± 0.6 b		23.6 ± 1.2 b
300	94.9 ± 2.7 a		149.7 ± 7.1 a		97.7 ± 2.4 a	21.0 ± 1.0 a		23.3 ± 0.7 a	16.5 ± 1.0 ab		83.2 ± 0.8 a	20.8 ± 0.9 a		25.2 ± 1.3 a
600	91.1 ± 1.6 b		115.2 ± 7.5 c		69.5 ± 2.2 d	11.6 ± 0.9 d		20.6 ± 0.6 c	13.2 ± 0.8 c		81.9 ± 1.0 c	17.7 ± 0.4 d		18.8 ± 0.4 d
900	89.1 ± 2.3 b		104.6 ± 6.5 d		52.3 ± 2.5 e	7.9 ± 0.5 e		18.2 ± 0.6 d	11.3 ± 0.8 d		81.0 ± 0.9 c	15.6 ± 0.5 e		12.5 ± 0.5 e
G	**		ns		**	**		**	**		**	**		**
Fe	**		**		**	**		**	**		**	**		**
G × Fe	ns		ns		**	**		*	*		**	**		**
Factor		SPAD value		Net photosynthetic rate [μmol/(m²∙s)]			Membrane stability index (%)			Leaf Fe content (mg/g)			Root Fe content (mg/g)
Genotype (G)
RD31		36.9 ± 0.4 cd		18.6 ± 0.6 b			72.8 ± 0.5 cd			7.2 ± 0.2 b			11.8 ± 0.4 b
RD41		37.8 ± 0.5 abcd		18.2 ± 0.7 b			75.2 ± 0.5 abcd			3.7 ± 0.1 f			10.9 ± 0.4 f
RD57		38.3 ± 0.3 abc		18.8 ± 1.0 b			77.1 ± 0.5 abc			5.7 ± 0.1 e			11.0 ± 0.2 d
RD71		38.1 ± 0.4 abc		19.6 ± 0.8 b			75.3 ± 0.6 abcd			5.3 ± 0.1 d			11.4 ± 0.3 e
RD77		35.7 ± 0.4 d		19.3 ± 0.6 b			74.5 ± 0.5 bcd			6.2 ± 0.1 c			11.6 ± 0.5 c
RD79		39.1 ± 0.2 abc		19.4 ± 0.8 b			77.2 ± 0.5 abc			3.9 ± 0.1 f			11.0 ± 0.3 e
RD85		39.2 ± 0.5 abc		23.0 ± 0.9 a			80.4 ± 0.2 ab			2.3 ± 0.1 h			10.1 ± 0.3 i
RD87		40.1 ± 0.3 a		22.4 ± 1.2 a			78.5 ± 0.4 abc			3.1 ± 0.1 g			10.6 ± 0.4 g
RD35		39.3 ± 0.5 ab		21.8 ± 0.8 a			78.4 ± 0.4 abc			2.6 ± 0.1 h			10.4 ± 0.2 h
Azucena		39.2 ± 0.6 ab		19.8 ± 0.7 b			81.3 ± 0.6 a			2.5 ± 0.1 h			9.9 ± 0.5 j
IR64		37.6 ± 0.5 bcd		19.2 ± 0.8 b			70.0 ± 0.4 d			8.7 ± 0.3 a			12.3 ± 0.5 a
Fe level (Fe, mg/L)
0 (control)		38.4 ± 0.4 bc		20.5 ± 0.7 c			84.1 ± 0.4 a			0.7 ± 0.0 e			4.1 ± 0.5 e
150		39.3 ± 0.4 ab		22.4 ± 0.5 b			83.9 ± 0.5 a			1.2 ± 0.0 d			8.0 ± 0.2 d
300		40.1 ± 0.4 a		25.0 ± 1.2 a			77.9 ± 0.4 b			2.0 ± 0.1 c			10.8 ± 0.2 c
600		37.5 ± 0.4 c		18.4 ± 0.5 d			71.4 ± 0.5 c			6.5 ± 0.1 b			13.3 ± 0.2 b
900		36.1 ± 0.4 d		13.7 ± 1.1 e			64.7 ± 0.6 d			12.8 ± 0.4 a			18.7 ± 0.5 a
G		**		**			**			**			**
Fe		**		**			**			**			**
G × Fe		**		**			**			**			**

Factor	Plant height (cm)		Root length (m)		Shoot dry matter (g/plant)	Root dry matter (g/plant)		Tiller number per plant	Panicle number per plant		Filled grain ratio (%)	1000-grain weight (g)		Grain yield (g/plant)
Genotype (G)
RD31	92.1 ± 1.9 bc		128.9 ± 6.4 a		86.5 ± 3.0 bc	13.3 ± 0.5 cd		23.6 ± 0.6 ab	16.6 ± 0.7 ab		78.6 ± 0.2 gh	16.8 ± 0.7 cd		19.1 ± 1.1 c
RD41	90.6 ± 3.6 bc		129.1 ± 6.2 a		71.9 ± 1.8 d	13.4 ± 0.7 cd		19.7 ± 0.5 d	14.1 ± 0.8 cd		81.6 ± 0.1 cde	19.0 ± 0.8 ab		19.4 ± 1.2 c
RD57	93.5 ± 2.0 b		127.2 ± 7.7 a		84.3 ± 1.4 c	12.0 ± 1.2 d		22.4 ± 0.5 bc	16.5 ± 0.8 ab		79.2 ± 0.1 fgh	18.3 ± 0.3 b		18.8 ± 1.0 c
RD71	91.7 ± 1.7 bc		125.4 ± 7.7 a		73.3 ± 1.3 d	13.0 ± 0.5 cd		21.4 ± 0.5 bcd	14.8 ± 0.9 bcd		81.2 ± 0.1 def	19.2 ± 0.7 ab		20.5 ± 0.8 bc
RD77	90.1 ± 2.7 bcd		121.4 ± 6.7 a		69.1 ± 2.3 de	11.6 ± 0.7 d		22.1 ± 0.8 bc	16.4 ± 0.8 ab		78.9 ± 0.2 gh	18.8 ± 0.4 ab		20.6 ± 0.8 bc
RD79	90.9 ± 2.4 bc		121.4 ± 6.8 a		90.1 ± 2.0 b	13.8 ± 0.6 bcd		21.7 ± 0.8 bcd	16.1 ± 1.2 abc		80.3 ± 0.4 efg	18.8 ± 0.4 b		20.9 ± 0.8 bc
RD85	84.8 ± 1.0 d		125.9 ± 4.4 a		68.5 ± 2.1 de	17.2 ± 1.1 a		22.2 ± 0.7 bc	17.1 ± 0.7 a		84.9 ± 0.3 b	20.3 ± 0.5 a		23.5 ± 0.8 a
RD87	87.9 ± 2.8 cd		120.1 ± 6.9 a		73.5 ± 1.8 d	15.9 ± 1.4 ab		21.0 ± 0.7 cd	15.0 ± 1.1 bc		82.9 ± 0.1 bcd	19.5 ± 0.8 ab		21.8 ± 0.5 ab
RD35	88.4 ± 3.4 bcd		128.9 ± 8.0 a		69.9 ± 1.0 de	16.2 ± 0.5 a		23.3 ± 0.8 zb	15.2 ± 0.9 abc		83.6 ± 0.3 bc	18.2 ± 0.5 bc		22.4 ± 0.8 ab
Azucena	129.3 ± 2.7 a		120.3 ± 10.2 a		106.3 ± 1.8 a	15.0 ± 0.6 abc		11.3 ± 0.5 e	7.0 ± 0.3 e		93.7 ± 0.1 a	18.8 ± 0.6 ab		16.4 ± 0.6 d
IR64	76.0 ± 1.6 e		126.7 ± 7.0 a		64.6 ± 4.0 e	16.5 ± 0.9 a		24.7 ± 1.0 a	13.0 ± 1.1 d		78.0 ± 0.2 h	16.5 ± 0.5 d		19.0 ± 1.0 c
Fe level (Fe, mg/L)
0 (control)	92.1 ± 2.2 ab		121.1 ± 8.8 c		80.9 ± 1.6 c	13.7 ± 0.8 c		21.5 ± 0.7 bc	15.5 ± 0.8 b		81.3 ± 0.8 bc	18.8 ± 0.4 c		21.0 ± 0.9 c
150	94.3 ± 2.8 a		134.6 ± 5.6 b		89.6 ± 1.5 b	17.5 ± 0.7 b		22.5 ± 0.7 ab	16.9 ± 0.9 a		83.0 ± 1.2 ab	19.9 ± 0.6 b		23.6 ± 1.2 b
300	94.9 ± 2.7 a		149.7 ± 7.1 a		97.7 ± 2.4 a	21.0 ± 1.0 a		23.3 ± 0.7 a	16.5 ± 1.0 ab		83.2 ± 0.8 a	20.8 ± 0.9 a		25.2 ± 1.3 a
600	91.1 ± 1.6 b		115.2 ± 7.5 c		69.5 ± 2.2 d	11.6 ± 0.9 d		20.6 ± 0.6 c	13.2 ± 0.8 c		81.9 ± 1.0 c	17.7 ± 0.4 d		18.8 ± 0.4 d
900	89.1 ± 2.3 b		104.6 ± 6.5 d		52.3 ± 2.5 e	7.9 ± 0.5 e		18.2 ± 0.6 d	11.3 ± 0.8 d		81.0 ± 0.9 c	15.6 ± 0.5 e		12.5 ± 0.5 e
G	**		ns		**	**		**	**		**	**		**
Fe	**		**		**	**		**	**		**	**		**
G × Fe	ns		ns		**	**		*	*		**	**		**
Factor		SPAD value		Net photosynthetic rate [μmol/(m²∙s)]			Membrane stability index (%)			Leaf Fe content (mg/g)			Root Fe content (mg/g)
Genotype (G)
RD31		36.9 ± 0.4 cd		18.6 ± 0.6 b			72.8 ± 0.5 cd			7.2 ± 0.2 b			11.8 ± 0.4 b
RD41		37.8 ± 0.5 abcd		18.2 ± 0.7 b			75.2 ± 0.5 abcd			3.7 ± 0.1 f			10.9 ± 0.4 f
RD57		38.3 ± 0.3 abc		18.8 ± 1.0 b			77.1 ± 0.5 abc			5.7 ± 0.1 e			11.0 ± 0.2 d
RD71		38.1 ± 0.4 abc		19.6 ± 0.8 b			75.3 ± 0.6 abcd			5.3 ± 0.1 d			11.4 ± 0.3 e
RD77		35.7 ± 0.4 d		19.3 ± 0.6 b			74.5 ± 0.5 bcd			6.2 ± 0.1 c			11.6 ± 0.5 c
RD79		39.1 ± 0.2 abc		19.4 ± 0.8 b			77.2 ± 0.5 abc			3.9 ± 0.1 f			11.0 ± 0.3 e
RD85		39.2 ± 0.5 abc		23.0 ± 0.9 a			80.4 ± 0.2 ab			2.3 ± 0.1 h			10.1 ± 0.3 i
RD87		40.1 ± 0.3 a		22.4 ± 1.2 a			78.5 ± 0.4 abc			3.1 ± 0.1 g			10.6 ± 0.4 g
RD35		39.3 ± 0.5 ab		21.8 ± 0.8 a			78.4 ± 0.4 abc			2.6 ± 0.1 h			10.4 ± 0.2 h
Azucena		39.2 ± 0.6 ab		19.8 ± 0.7 b			81.3 ± 0.6 a			2.5 ± 0.1 h			9.9 ± 0.5 j
IR64		37.6 ± 0.5 bcd		19.2 ± 0.8 b			70.0 ± 0.4 d			8.7 ± 0.3 a			12.3 ± 0.5 a
Fe level (Fe, mg/L)
0 (control)		38.4 ± 0.4 bc		20.5 ± 0.7 c			84.1 ± 0.4 a			0.7 ± 0.0 e			4.1 ± 0.5 e
150		39.3 ± 0.4 ab		22.4 ± 0.5 b			83.9 ± 0.5 a			1.2 ± 0.0 d			8.0 ± 0.2 d
300		40.1 ± 0.4 a		25.0 ± 1.2 a			77.9 ± 0.4 b			2.0 ± 0.1 c			10.8 ± 0.2 c
600		37.5 ± 0.4 c		18.4 ± 0.5 d			71.4 ± 0.5 c			6.5 ± 0.1 b			13.3 ± 0.2 b
900		36.1 ± 0.4 d		13.7 ± 1.1 e			64.7 ± 0.6 d			12.8 ± 0.4 a			18.7 ± 0.5 a
G		**		**			**			**			**
Fe		**		**			**			**			**
G × Fe		**		**			**			**			**

Genotype	Tolerance (TOL)					Stress tolerance index (STI)
Genotype	150 mg/L	300 mg/L	600 mg/L	900 mg/L	Mean^#	150 mg/L	300 mg/L	600 mg/L	900 mg/L	Mean^#
RD31	-2.92 ± 0.26 g	-5.24 ± 0.69 i	1.83 ± 0.62 e	10.16 ± 1.75 b	5.99 ± 1.19 c	1.00 ± 0.01 b	1.03 ± 0.01 d	0.83 ± 0.01 g	0.66 ± 0.01 g	0.75 ± 0.01 f
RD41	-3.79 ± 0.15 i	-5.32 ± 0.29 j	1.31 ± 0.38 f	7.23 ± 1.08 i	4.27 ± 0.78 h	1.04 ± 0.00 a	1.10 ± 0.01 a	0.85 ± 0.01 f	0.81 ± 0.01 c	0.83 ± 0.01 d
RD57	-4.10 ± 0.51 j	-5.68 ± 0.61 k	2.73 ± 0.68 b	8.34 ± 1.13 e	5.54 ± 0.91 d	1.01 ± 0.02 b	1.11 ± 0.00 a	0.88 ± 0.02 de	0.77 ± 0.01 e	0.83 ± 0.02 d
RD71	-2.66 ± 0.19 e	-4.88 ± 0.25 f	2.32 ± 0.60 c	8.16 ± 1.24 g	5.24 ± 0.92 f	1.01 ± 0.01 b	1.08 ± 0.01 c	0.87 ± 0.00 ef	0.77 ± 0.02 e	0.82 ± 0.01 d
RD77	-2.19 ± 0.11 c	-4.91 ± 0.82 g	2.29 ± 0.81 d	8.32 ± 1.38 f	5.30 ± 1.10 e	1.01 ± 0.01 b	1.10 ± 0.02 ab	0.85 ± 0.01 f	0.75 ± 0.01 f	0.80 ± 0.01 e
RD79	-3.04 ± 0.28 h	-5.01 ± 0.26 h	2.28 ± 0.75 d	9.77 ± 1.13 c	6.03 ± 0.94 b	1.02 ± 0.01 ab	1.10 ± 0.00 ab	0.90 ± 0.01 d	0.79 ± 0.01 cd	0.84 ± 0.01 c
RD85	-2.46 ± 0.12 d	-3.79 ± 0.82 b	1.21 ± 0.39 g	6.93 ± 1.20 j	4.07 ± 0.80 j	1.01 ± 0.03 b	1.12 ± 0.02 a	0.94 ± 0.02 ab	0.83 ± 0.02 b	0.88 ± 0.02 b
RD87	-1.03 ± 0.09 a	-4.06 ± 0.71 d	0.86 ± 0.57 h	9.48 ± 1.79 d	5.17 ± 1.18 g	1.01 ± 0.02 b	1.08 ± 0.01 bc	0.91 ± 0.01 c	0.78 ± 0.02 de	0.85 ± 0.02 c
RD35	-2.77 ± 0.14 f	-4.29 ± 0.95 e	0.73 ± 0.90 i	7.78 ± 1.67 h	4.26 ± 1.29 i	1.01 ± 0.01 b	1.11 ± 0.00 a	0.92 ± 0.01 bc	0.83 ± 0.01 b	0.87 ± 0.01 b
Azucena	-1.19 ± 0.17 b	-3.87 ± 0.43 c	0.45 ± 0.45 j	4.36 ± 0.98 k	2.40 ± 0.72 k	1.02 ± 0.01 ab	1.10 ± 0.00 ab	0.95 ± 0.02 a	0.85 ± 0.02 a	0.90 ± 0.02 a
IR64	-3.02 ± 0.35 h	1.16 ± 0.67 a	8.15 ± 1.79 a	12.95 ± 1.34 a	10.55 ± 1.57 a	1.00 ± 0.01 b	0.91 ± 0.01 e	0.70 ± 0.01 h	0.58 ± 0.01 h	0.64 ± 0.01 g

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