Table 4.
Cumulative stress response index (CSRI), sum of relative individual component responses (total protein, soluble sugar, proline, ascorbate and glutathione content) at a given UV-B dose; and total stress response index (TSRI), pooled over all the treatments of UV-B irradiation (7, 14, 21 and 28 kJ m−2d−1) in nine rice varieties
| Treatments | Varieties | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Mangalamahsuri | Aathira | Kanchana | Jyothi | Annapoorna | Neeraja | Swetha | Swarnaprabha | Aiswarya | |
| Cumulative stress response index (CSRI) | |||||||||
| 7 kJ m−2 d−1 | 597.4 | 702.2 | 584.4 | 316.7 | 219.2 | 225.9 | 233.7 | 121.4 | 3.5 |
| 14 kJ m−2 d−1 | 1554.2 | 2088.2 | 1490.9 | 496.4 | 375.1 | 551.4 | 329.6 | 195.3 | 128.9 |
| 21 kJ m−2 d−1 | 2472.8 | 2043.9 | 1950.1 | 549.7 | 541.7 | 419.7 | 457.3 | 259.0 | 260.8 |
| 28 kJ m−2 d−1 | 2876.3 | 2412.0 | 2223.7 | 521.9 | 730.2 | 516.1 | 489.8 | 191.8 | 257.4 |
| Total stress response index (TSRI) | |||||||||
| 7500.7 (t) | 7246.3 (t) | 6249.1 (t) | 1884.7 (In) | 1866.2 (In) | 1713.1 (In) | 1510.6 (s) | 767.5 (s) | 650.6 (s) | |
The letters in parenthesis indicate the tolerance/sensitivity of rice varieties given in accordance to their performance upon UV-B irradiation
t tolerant, In intermediate, s sensitive