Figure 4.

Performance of CcHyPRP-transgenic plants against drought, salt and heat stress at the reproductive stage. Transgenic and control (90–100 days old) plants were subjected to drought (withholding water) and salt (250 mM NaCl) stress treatments for 10 days at 30°C. Heat stress treatments were given at 38°C for 2 h, 40°C for 2 h, and 42°C for 2 h followed by transferring to normal temperature (30°C) for the rest of the day. This cycle of heat stress treatments was repeated for 3 days. (A) Panicle size and filled grains/panicle of control and transgenic rice plants subjected to stress treatments. Data on panicle length (B) and grain number/panicle (C) were recorded. In each treatment, 10 plants were used and all the experiments were repeated thrice. Bar represents mean and I represents SE from three independent experiments. ^*indicates significant differences in comparison with the C at P < 0.05. 1, 2, 3, 4 represent CR-transgenics; 5, 6, 7, 8 represent RR-transgenics; CR1, CR2, CR3, and CR4 represent 35S transgenic lines; RR1, RR2, RR3, and RR4 represent rd29A transgenic lines; C represents control plants.