| Effects of seed priming on the physiological characteristics of sorghum seedlings under saline stress |
|
View Fulltext View/Add Comment Download reader |
| |
| DOI：10.7606/j.issn.1000-7601.2016.05.07 |
| Key Words: seed priming sorghum salt stress germination physiological |
| Author Name | Affiliation | | ZHANG Fei | Liaoning Provincial Academy of Agricultural Sciences, Innovation Center, Shenyang, Liaoning 110161, China | | ZHU Kai | Liaoning Provincial Academy of Agricultural Sciences, Innovation Center, Shenyang, Liaoning 110161, China | | WANG Yan-qiu | Liaoning Provincial Academy of Agricultural Sciences, Innovation Center, Shenyang, Liaoning 110161, China | | ZHANG Zhi-peng | Liaoning Provincial Academy of Agricultural Sciences, Innovation Center, Shenyang, Liaoning 110161, China | | ZOU Jian-qiu | Liaoning Provincial Academy of Agricultural Sciences, Innovation Center, Shenyang, Liaoning 110161, China |
|
| Hits: 1571 |
| Download times: 997 |
| Abstract: |
| To explore the physiological effects of sorghum seedlings by seed priming under saline soil conditions and enhance the salt tolerance of sorghum at sprouting and seedling stages, a pot culturing experiment was employed in this study to investigate complex salt priming (CSP), single salt priming (SSP), none salt priming (NSP) on sorghum seeds that were sown in the sandy soil conditions treated with 0, 40, 80, 120 mmol·L-1 and 160 mmol·L-1 salt solution irrigations. Consequently, seed germination and seedling physiological characteristics were studied. The results showed that seed priming could improve the seed germination rate, emergence rate and vigor index of sorghum seeding, especially through the effect of complex salt initiator (CSP) treatment with NaCl and Na2SO4 under different soil salt stresses. In addition, after seed priming, especially when treated by CSP, it could significantly relief the relative reduction of water content in leaves and roots, particularly under middle and high salt stresses. Also, the amounts of chlorophyll a+b and chlorophyll a showed a slow decline. When the concentration of salt was no more than 80 mmol·L-1 (Salt-80), the net photosynthesis showed a little reduction, and stomatal conductance and transpiration rate were consistent with the varying trend. Moreover, seed priming enhanced the SOD, POD, CAT and APX activities, while reduced the MDA and O-·2. MDA, O-·2 and POD were the more sensitive factors than others. The effects on the antioxidant system were in the order of the following: complex salt priming (CSP)> single salt priming (SSP)> complex salt priming (NSP). In conclusion, seed priming with NaCl and Na2SO4 complex solution could enhance the physiological adaptation of sorghum seedlings and improve the salt tolerance of sorghum at the sprouting and seedling stages. |
|
|
|