山西农业大学学报（自然科学版）2019，Vol.39Issue(6)：34-39,6.DOI:10.13842／j.cnki.issn1671‐8151 .201903077
PEG 引发种子对干旱逆境下甜玉米萌发及幼苗生长的生理调节
Physiological regulation of peg‐seed primings on sweet corn germination and seedling growth under drought stress
摘要
Abstract
The objective of this research was to investigate the effects of PEG‐induced seeds on the emergence and seedling development of sweet corn(Zea mays L ) ,and to reveal the mechanism of PEG‐induced sorghumseed regulationunder drought stress.[Methods] Sweet cornseeds var.Golden Crown 218 were induced by 20% PEG 8000 solution ,and pot experi‐ments were conducted.Plants were irrigated at four levels as drought stress ,including 100% of the filed soil optimal water ca‐pacity (30%) as control group ,80%,60%,and 40% as drought treatments.Seed germination rates and parameters of phys‐iological characteristics of seedlings were measured.[Results] The results indicated that the resistance of PEG induced seeds to drought stress was enhanced due to the improved germination ability and increased germination rate.In addition ,leaf photo‐synthesis rate of PEG treated seeds was promoted under drought stress compared to non‐PEG treated groups.In terms of os‐motic adjustment ,the proline ( P‐value ＝ 0.001**) , free amino acid P‐value ＝ 0.002**) and conductivity ( F value ＝0.003**) of seedling leaves with PEG‐induced seeds were significantly different from non‐PEG treatments under drought stress.The activities of both SOD and CAT in PEG treatments demonstrated the extremely significant difference from non‐treated groups between 6 to 12 days after sowing under all different drought stress levels ,with the declined increasing rate of O2－ .[Conclusion] In conclusion ,seed priming with PEG could be used as an important strategy for drought tolerant cultiva‐tion of sweet corn in the field.关键词
甜玉米/PEG引发种/干旱/生理Key words
Sweet corn/PEG seed priming/Drought/Physiology分类
农业科技引用本文复制引用
于惠琳,吴玉群,胡宝忱,尤丹,王延波..PEG 引发种子对干旱逆境下甜玉米萌发及幼苗生长的生理调节[J].山西农业大学学报（自然科学版）,2019,39(6):34-39,6.基金项目
国家重点研发计划项目(2017YFD0300700) （2017YFD0300700）
国家重点研发计划项目(2017YFD0300701‐A01A ) （2017YFD0300701‐A01A ）
