Physiological and biochemical responses of strawberry crown and leaf tissues to freezing stress

BMC Plant Biology

Table 1 Analysis of variance for the influence of freezing temperature stress on physiological, biochemical, and morphological traits of strawberry cultivars

		Mean sum of squares
Source of variance	df	F_v/F_m	RWC	Leaf FI	Crown FI	Leaf total soluble carbohydrates	Crown total soluble carbohydrates	Crown total protein	Leaf total protein
Temperature (T)	5	0.24**	2672.32**	7033.60**	13,085.56**	1559.10**	1169.19**	605.43**	1017.92**
Cultivar (C)	6	0.041**	156.07**	841.38**	281.68**	96.99**	124.54**	44.83**	101.13**
T × C	30	0.006**	62.93**	180.20**	183.5**	13.38**	20.47**	35.56**	21.99**
Error	84	0.0001	10.66	3.07	0.97	2.79	0.34	1.43	0.64
Coefficient of variation (%)		2.79	4.78	9.73	4.69	3.94	3.27	7.81	4.27
		Mean sum of squares
Source of variance	df	Leaf proline	Crown proline	Leaf TBARS	Crown TBARS	Leaf SOD	Crown SOD	Leaf POD	Crown POD
Temperature (T)	5	18.39**	21.99**	515.82**	513.90**	1637.38**	238.45**	98.37**	1076.53**
Cultivar (C)	6	2.57**	2.57**	28.75**	40.25**	240.07**	33.86**	73.49**	219.16**
T × C	30	1.85**	1.16**	7.53**	8.86**	134.98**	81.88**	76.19**	166.13**
Error	84	0.02	0.009	0.61	0.56	1.17	0.87	2.49	3.07
Coefficient of variation (%)		9.35	5.93	6.35	6.41	8.77	10.19	13.23	16.67

df Degree of freedom, Fv/Fm Maximum quantum yield of PSII, RWC Leaf relative water content, FI Freezing injury, TBARS Thiobarbituric acid reactive substances, SOD Superoxide dismutase, POD Peroxidase
** Significant at P ≤ 0.05

ISSN: 1471-2229