Biochemical and Anatomical Changes and Yield Reduction in Rice (Oryza sativa L.) under Varied Salinity Regimes

Table 1

The main effect of salinity on biochemical characteristics and yield of eight rice varieties.

Salinity levels (dSm^−1)	Chlorophyll-a (mg/cm^2)	Chlorophyll-b (mg/cm^2)	Total chlorophyll (mg/cm^2)	Chlorophyll a/b	Proline (μmol g^−1 fw)	Reducing sugar (mg g^−1 fw)	Nonreducing sugar (mg g^−1 fw)	Total soluble sugar (mg g^−1 fw)	Free amino acid (mg g^−1 fw)	Total soluble protein (mg g^−1 fw)	Grain yield (g hill^−1)
0	8.99^a	4.67^a	13.67^a	1.93^c	4.64^d	19.50^c	19.87^a	39.38^c	18.50^a	29.36^a	17.78^a
4	8.11^b	3.60^b	11.71^b	2.28^b	5.71^c	29.13^b	18.11^b	47.24^b	14.6^b	26.30^b	11.63^b
8	6.59^c	2.57^c	9.15^c	2.57^a	11.33^b	40.75^a	13.92^c	54.68^a	10.86^c	22.64^c	5.73^c
12	4.14^d	1.71^d	5.86^d	2.46^ab	23.75^a	16.54^d	10.34^d	26.89^d	5.64^d	15.28^d	1.65^d
Variety
IR20	6.91^bc	3.16^b	10.07^bc	2.36^abc	13.9^bc	18.96^e	10.09^f	29.09^d	7.87^e	19.77^e	4.97^d
Pokkali	7.39^ab	3.62^a	11.01^a	2.10^c	8.58^e	31.18^a	19.50^a	50.58^a	14.17^b	26.79^a	7.64^c
MR33	6.72^cd	2.72^c	9.44^de	2.58^a	11.69^cd	24.85^d	12.52^e	37.38^c	16.31^a	23.63^bc	9.09^b
MR52	6.22^d	2.93^c	9.19^e	2.16^bc	15.37^b	32.39^a	19.0^ab	51.39^a	9.15^de	20.86^de	9.10^b
MR211	7.70^a	3.29^b	10.99^a	2.39^ab	8.625^e	26.83^bc	17.82^bc	44.65^b	15.68^a	28.19^a	12.41^a
MR219	6.95^bc	2.96^c	9.91^cd	2.45^a	11.57^cd	24.71^d	14.77^d	39.48	10.65^c	22.06^cd	8.79^b
MR232	7.39^ab	3.20^b	10.60^ab	2.32^abc	10.325^d	27.64^b	16.50^c	44.15^b	15.17^ab	24.49^b	13.49^a
BRRI dhan29	6.38^d	3.22^b	9.61^cde	2.14^bc	15.97^a	25.29^cd	14.29^d	39.58^c	10.36^cd	20.70^de	5.98^d
𝐹-test	**	**	**	**	**	**	**	**	**	**	**
CV (%)	9.18	7.25	6.73	13.86	11.47	9.49	14.64	8.17	15.21	9.79	16.37

Means with the same letter in the columns do not differ significantly (𝑃≤0.05), **significant in 1% level.