| 5–氨基乙酰丙酸缓解‘红颜’草莓盐胁迫伤害的时间效应研究 |
| |
| 引用本文： | 吴雯雯,安玉艳,汪良驹.5–氨基乙酰丙酸缓解‘红颜’草莓盐胁迫伤害的时间效应研究[J].园艺学报,2017,44(6):1038-1048. |
| |
| 作者姓名： | 吴雯雯 安玉艳 汪良驹 |
| |
| 作者单位： | （南京农业大学园艺学院，南京 210095） |
| |
| 基金项目： | 国家自然科学基金项目(31401820)，江苏省自然科学基金项目(BK20140702)，中央高校基本科研业务费专项基金项目(KJQN201538)，江苏高校优势学科建设工程项目(PAPD130809001) |
| |
| 摘 要： | 为了明确外源5–氨基乙酰丙酸(5-ALA)缓解草莓盐胁迫伤害的适宜处理时间,比较了不同时间点添加外源5-ALA缓解植物盐胁迫伤害的效应,发现在100 mmol·L-1 Na Cl处理前5 d、处理同时或处理后3 d分别用10 mg·L-1 5-ALA溶液浇灌‘红颜’草莓根际,前5 d预处理的效果最佳,喻示着5-ALA的预防效应高于治疗效应。进一步于盐处理前5、10、15和20 d分别用5-ALA溶液根灌草莓苗,发现提前20 d预处理的效果最好,说明至少在20 d以内提前预处理越早,越有利于缓解盐胁迫对草莓苗的伤害。试验观察到,5-ALA缓解草莓盐胁迫伤害主要表现为:(1)缓解盐胁迫导致的草莓叶片叶绿素含量以及叶绿素b/a比值下降;(2)诱导盐胁迫下草莓叶片和根系抗氧化酶活性上升,缓解由盐胁迫导致的超氧阴离子生成速率加快;(3)有利于PSⅡ–PSⅠ之间电子传递,提高光能吸收、捕获、传递效率,减少热耗散,提高光合性能指数;(4)缓解盐胁迫对草莓植株生长的抑制作用,提高植株整体,特别是根系的生物学产量。
|
| 关 键 词： | 草莓 5-ALA 盐胁迫 叶绿素荧光 活性氧代谢 时间效应 |
Study on Time Effects of Exogenous 5-Aminolevulinic Acid Treatment on Alleviating Salinity Injury in ‘Benihoppe’ Strawberry |
| |
| WU Wenwen,AN Yuyan,WANG Liangju.Study on Time Effects of Exogenous 5-Aminolevulinic Acid Treatment on Alleviating Salinity Injury in ‘Benihoppe’ Strawberry[J].Acta Horticulturae Sinica,2017,44(6):1038-1048. |
| |
| Authors: | WU Wenwen AN Yuyan WANG Liangju |
| |
| Institution: | （College of Horticulture，Nanjing Agricultural University，Nanjing 210095，China） |
| |
| Abstract: | In order to determine the suitable time for 5-aminolevulinic acid (5-ALA) application to alleviate salinity injury in strawberry (Fragaria × ananassa Duch.‘Benihoppe’),exogenous 10 mg · L-1 5-ALA solution was rhizospherically applied at 5 days before,simultaneously or 3 days after 100 mmol · L-1 NaC1 treatment,and the results showed that the alleviating effect was best in the pretreatment.This result implies that 5-ALA is more preventive than therapeutic for strawberry against salt stress.After then,another experiment was carried out,where 10 mg · L-1 5-ALA solutions were rhizospherically pretreated to strawberry plants 5,10,15 or 20 days before NaC1 treatment and the result showed that the pretreatment prior 20 d was the best effective treatment,which means that the earlier the strawberry was pretreated with 5-ALA,the less of salinity injury was found.It was observed that the possible alleviating mechanisms of 5-ALA against salt stress in strawberry may include the follows.(1) 5-ALA alleviated the decrease of leaf chlorophyll content and Chl.b/a ratio induced by salinity in strawberry.(2) 5-ALA induced the additional increase of antioxidant enzyme activities and decreased the production rate of superoxide anion in the leaves and roots of strawberry under salt stress.(3) 5-ALA was beneficial to intersystem electron transport from PS Ⅱ to PS Ⅰ,increasing the energy conversion efficiency during light energy absorption,harvest and transport,reducing heat dissipation,and improving photosynthetic capacity under salt stress.(4) 5-ALA alleviated the inhibition of plant growth induced by salt stress,including shoots and roots,especially the latter. |
| |
| Keywords: | strawberry 5-ALA salt stress chlorophyll fluorescence reactive oxygen metabolism time effect |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《园艺学报》浏览原始摘要信息 |
| 点击此处可从《园艺学报》下载免费的PDF全文 |
|
