LI Xueling,PANG Haiying,NIU Dongwei,et al.Effect of Different Exogenous Hormones on Cold-resistant Ability and Related Physiological Indicators of Plum Flower[J].Northern Horticulture,2017,41(11):17-22.[doi:10.11937/bfyy.201711004]
不同外源激素对李花抗寒性及相关生理指标的影响
- Title:
- Effect of Different Exogenous Hormones on Cold-resistant Ability and Related Physiological Indicators of Plum Flower
- 文献标志码:
- A
- 摘要:
- 以“大石早生李”“安哥诺李”“黑宝石李”“李王”4个李品种为试材，以喷水处理为对照，研究了喷施适宜浓度的外源水杨酸（SA）或脱落酸（ABA）〖JP〗对-2 ℃低温处理4 h后4个品种的李花抗寒性及相关生理指标的影响。结果表明：0.20 mmol?L-1 SA、0.15 mmol?L-1 SA、50 mg?L-1 〖JP3〗ABA、20 mg?L-1 ABA可以分别显著降低“大石早生李”“安哥诺李”“黑宝石李”“李王”的过冷却点温度，提高李花的抗寒性；对“大石早生李”“安哥诺李”“黑宝石李”“李王”4个李品种分别喷施适宜浓度的激素，低温胁迫下4个品种电解质外渗率比对照依次降低了32.19%、15.82%、40.60%、35.52%；丙二醛（MDA）含量比对照依次降低了5.46%、5.11%、17.98%、9.40%，O?[TX-*4]2产生速率比对照依次降低了10.24%、32.44%、7.67%、53.09%；H2O2含量比对照依次降低了19.99%、53.15%、30.17%、24.04%。喷施适宜浓度的外源SA、ABA可以减弱低温胁迫下李花的膜质过氧化作用，降低低温对细胞膜的破坏，从而一定程度上提高李花的抗寒性。
- Abstract:
- Four plum cultivars Prunus salicina ‘Oishiwas’‘Angeleno’‘Fraiar’‘Liwang’ were used as the test materials，H2O treatment as comparison，the effects of exogenous SA or ABA in their proper concentration on the cold-resistance and related physiological targets of flowers during -2 ℃ chilling stress were studied.The results showed that 0.20 mmol?L-1 SA for Prunus salicina ‘Oishiwas’，0.15 mmol?L-1 SA for ‘Angeleno’,50 mg?L-1 ABA for ‘Fraiar’ and 20 mg?L-1 ABA for ‘Liwang’ could decrease the supercooling temperature and enhance chilling tolerance in plum flowers.Four suitable concentration of hormone which were sprayed on four varieties compared with the control，could decrease the electrolyte osmotic rates by 32.19%，15.82%，40.60%，35.52%;decrease the MDA content by 5.46%，5.11%，17.98%，9.40%；decrease the genaration rate of O?[TX-*4]2 by 10.24%，32.44%，7.67%，53.09% and decrease the H2O2 content by 19.99%，53.15%，30.17%，24.04%.Taken together，it was considered that the suitable exogenous SA，ABA could enhance chilling tolerance in plum flowers by reducing the membrane lipid peroxidation and the destruction of cell membrane under low temperature stress.
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备注/Memo
第一作者简介：李学玲（1991-），女，硕士研究生，研究方向为经济林栽培生理。E-mail:1556770793@qq.com.责任作者：李彦慧（1971-），女，河北易县人，博士，教授，现主要从事经济林栽培生理等研究工作。E-mail:YanHuili01@163.com.基金项目：公益性行业（农业）科研专项资助项目（201003058-5）；河北省科技支撑资助项目（16236802D）。