On the basis of regional afforestation test on the excellent tree species of small poplar 2, further drought tolerance research, mainly through the potting test, to study in the continuous drought, small poplar 2 coping with drought stress mechanism, using samples are 2 years old small poplar, in early May, from Dengkou transplanted 2 years old seedlings to the loaded Kubuqi Desert sandy plastic pots, cut off the pole 40cm Promote new branches, after normal watering and maintenance, to the end of August to start the water control test, measured every 3 days, until the leaf wilt can not be tested, the measurement includes:
Soil water content (soil box sampling, 3 replicates), leaf water content (5 leaves per treatment), leaf photosynthetic characteristics (3 replicates per treatment) and biochemical characteristics (each indicator, each treatment to take 5g, -80 ° frozen determination, the specific determination method see botanical test guide). A total of four measurements were completed until the leaves were completely wilted, soil water content bush 20.08% to 0.98%, leaf water content and relative water content decreased, leaf saturation deficit increased, increased by 36.25%; with the increase of drought stress, the net photosynthetic rate (A) of small huayu2 decreased, photosynthetic rate increased with photosynthetically active radiation (PAR), to 700 mmol m -² s-¹ to reach the light saturation rate; biochemical indicators malondialdehyde (MDA) and proline (POD) content increased, plant organs suffered damage under adversity, the occurrence of membrane peroxidation, malondialdehyde content can reflect the degree of plant damage by adversity, plants suffered from the adversity of stress, the increase in proline content can reduce the cellular Water potential is conducive to cell or tissue water holding, improving the plant's resistance. With the increase of the degree of stress, the POD content in the leaves of small poplar No.2 continued to rise, and compared with the control, the POD content in different degrees of stress increased by 5.36%, 17.06% and 39.21%, respectively.
On the basis of regional afforestation test on the excellent tree species of small poplar 2, further drought tolerance research, mainly through the potting test, to study in the continuous drought, small poplar 2 coping with drought stress mechanism, using the sample is a 2-year-old small poplar, transplanted from Dengkou in early May, the 2-year-old live seedling to the loaded Kubuqi Desert sandy plastic pots, cut off the pole 40 cm After normal watering and maintenance, we started the water control test at the end of August, and measured every 3 days until the leaves wilted and could not be tested.
Soil water content (soil box sampling, 3 replicates), leaf water content (5 leaves per treatment), leaf photosynthetic characteristics (3 replicates per treatment) and biochemical characteristics (5g of each indicator, each treatment, -80° frozen and measured, see the botanical test guide for the specific measurement method). A total of four measurements were completed until the leaves were completely wilted.
Data quality is good.
| # | number | name | type |
| 1 | 2016YFC0500900 | National key R & D plan |
This work is licensed under
CC BY 4.0 (Creative Commons Attribution 4.0 International License).
CSTR:11738.11.ncdc.ZDYF.db1673.2022
10.12072/ncdc.ZDYF.db1673.2022
