You Zhao, Chao Zhaoxia, Yao Zhengpei, Ren Yanping, Chen Quanjia, Qu Yanying, Zhang Hua
We studied 10 transgenic lines of MvNHX1 and three transgenic lines of MvP5CS, all of which were the T7 generations obtained from the way of pollen tube channel. The non-transgenic cotton D5 was used as a control, and the study took place in a greenhouse and in the field. Under conditions of drought and salt stress in the greenhouse, we measured the germination rate, chlorophyll content, proline content and MDA content of the MvNHX1 transgenic lines, the MvP5CS transgenic lines and the D5 control. We found that the chlorophyll and proline content of transgenic lines were higher than the control and the MDA content was lower. Under conditions of drought stress in the florescence in the field, we found that branches, the effective branches, bolls, the effective bolls, the boll weight and the lint of the two transgenic lines exceeded the control. Consequently, the productivity of transgenic cotton was found to be higher during drought stress. Furthermore, elongation at break, short fiber content, micronaire and spinning consistency index of the two transgenic lines were higher than in the D5 control. The results of the two transgenic lines showed that the MvNHX1 lines had advantages in terms of salt tolerance and that the MvP5CS lines were superior in drought tolerance.