|
|
|
| Responses of root development after transplanting of seed-base and container seedlings of Platycladus orientalis under different water stresses |
| Yang Xitian, Xue Shuaizheng, Wang Xiangyang, Wu Mingzuo, Yan Dongfeng |
| Forestry College, Henan Agricultural University, 450002, Zhengzhou,China |
|
|
|
|
Abstract The water stress happening in seedling period is a key factor inhibiting the revegetation in arid regions. In order to explore the responses of different stoke types to water stress, we transplanted seed-base seedling (SS) and container seedling (CS) of Platycladus orientalis in water controlled condition. Soil water was controlled at three levels: well watered (WW), mild water stress (MWS) and severe water stress (SWS). The results showed that SS of P. orientalis had greater taproot length, root length and root surface area, but smaller number of root tips and first order lateral roots than CS. Taproot length increased with the water stress getting more severe; however, total root length decreased rapidly. For both SS and CS, their diameter at ground level and root biomass decreased as the water stress intensified, but the root-to-shoot ratio of SS increased. These results may indicate that SS outperforms CS after transplantation under water stress condition.
|
|
Received: 05 September 2013
|
|
|
|
|
|
|
|
|
