Antioxidant Status of Vigna mungo L. in Response to Sulfur Nutrition

Table 2

Effect of graded level of sulfur supply on photoassimilatory pigments (chlorophylls and carotenoids), carbohydrates (sugars and starch), and cysteine in leaves of black gram plants at 28 days of growth.

S supply: meq S L^−1	1.0	2.0	4.0	6.0	8.0
Chlorophyll: mg g^−1 fresh weight
Chl. 𝑎	0.328^e	0.507^d	0.704^a	0.671^b	0.541^c
Chl. 𝑏	0.199^d	0.306^c	0.358^a	0.339^a	0.287^b
Total Chl.	𝟎.𝟓𝟎𝟕^d	𝟎.𝟖𝟏𝟑^c	𝟏.𝟎𝟔𝟐^a	𝟏.𝟎𝟏𝟏^b	𝟎.𝟖𝟐𝟖^c
Chl 𝑎/𝑏	1.648^c	1.656^c	1.966^a	1.971^a	1.882^b
Carotenoids: mg g^−1 fresh weight
Car	0.245^d	0.361^c	0.537^a	0.489^b	0.386^c
Chl/Car	2.091^d	2.250^b	1.978^a	2.067^d	2.147^c
Carbohydrates: % fresh weight
Reducing sugar	0.093^c	0.085^d	0.076^e	0.120^a	0.100^b
Nonreducing sugar	0.082^a	0.080^a	0.022^c	0.057^b	0.025^c
Total sugar	𝟎.𝟏𝟕𝟓^a	𝟎.𝟏𝟔𝟓^b	𝟎.𝟎𝟗𝟖^d	𝟎.𝟏𝟕𝟕^a	𝟎.𝟏𝟐𝟓^c
Starch	2.530^a	1.915^c	0.960^e	1.725^d	2.415^b
Cysteine: mM 100 mg^−1 fresh weight
Cysteine	0.081^e	0.119^d	0.148^c	0.199^b	0.227^a

Differences between group means with different letters in the same row are significant at 𝑃≤0.05.