[1]韩占江,程龙,杨赵平,等.硬枝碱蓬种子萌发对盐旱胁迫的响应[J].北方园艺,2015,39(04):63-66.[doi:10.11937/bfyy.201504015]
　HAN Zhan-jiang,CHENG Long,YANG Zhao-ping,et al.Response of Seed Germination to Salt and Drought Stress in Suaeda rigida[J].Northern Horticulture,2015,39(04):63-66.[doi:10.11937/bfyy.201504015]

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硬枝碱蓬种子萌发对盐旱胁迫的响应

《北方园艺》[ISSN:1001-0009/CN:23-1247/S] 卷: 第39卷期数: 2015年04 页码: 63-66 栏目: 出版日期: 2015-02-28

Title:: Response of Seed Germination to Salt and Drought Stress in Suaeda rigida

作者:: 韩占江; 程龙; 杨赵平; 张玲; 石强; （塔里木大学植物科学学院，新疆生产建设兵团塔里木盆地生物资源保护利用重点实验室，新疆阿拉尔 843300）

Author(s):: HAN Zhan-jiang; CHENG Long; YANG Zhao-ping; ZHANG Ling; SHI Qiang; （College of Plant Science，Tarim University,Xinjiang Production and Construction Corps Key Laboratory of Protection and Utilization of Biological Resources in Tarim Basin，Alar，Xinjiang 843300)

关键词:: 硬枝碱蓬; 盐胁迫; 干旱胁迫; 萌发特性

Keywords:: Suaeda rigida Kung et G.L.Chu; salt stress; drought stress; germination characteristics

DOI:: 10.11937/bfyy.201504015

文献标志码:: A

摘要:: 以硬枝碱蓬种子为试材，在最适的温光条件下，研究不同NaCl和PEG（分子量为6 000）处理对硬枝碱蓬种子萌发特性的影响。结果表明：低浓度的盐（NaCl浓度为100 mmol/L）显著缩短了硬枝碱蓬种子的萌发进程，但对硬枝碱蓬种子的最终萌发率无显著影响；中等或高浓度的盐（NaCl浓度为200～500 mmol/L）显著延长了硬枝碱蓬种子的平均萌发时间，降低了种子的最终萌发率。轻度干旱（外界渗透势为-0.2 MPa时）显著促进硬枝碱蓬种子萌发，缩短平均萌发时间，快速达到最终萌发率，完成萌发进程，最终萌发率最高，为99%，显著高于对照；中度和严重干旱（渗透势在-1.2～-0.4 MPa范围时）显著抑制硬枝碱蓬种子萌发，随着外界渗透势的降低，种子最终萌发率呈显著下降的趋势，平均萌发时间延长，达到最终萌发率的速度较慢，完成萌发进程用时延长；在外界渗透势为-1.2 MPa时最终萌发率最低，仅为28%。硬枝碱蓬种子的耐盐（NaCl）阈值和极限值分别为394.30 mmol/L和894.30 mmol/L；硬枝碱蓬种子的耐旱（PEG-6000）阈值和极限值分别为-0.88 MPa和-1.79 MPa。综上所述，硬枝碱蓬种子萌发时表现出较强的抗盐性和抗旱性。

Abstract:: Taking Suaeda rigida Kung et G.L.Chu seed as materials ， effects of different treatments of NaCl and PEG （ molecular weight 6000) on seed germination characteristics were studied.The results showed that low concentration of salt (NaCl concentration 100 mmol/L) shorten significantly germination process of Suaeda rigida ， whereas had no significant effect on its final germination rate.Medium or high salt concentration (NaCl concentrations were 200—500 mmol/L) prolonged significantly average germination time and reduced final germination rate of Suaeda rigida  .The mild drought (osmotic potential was -0.2 MPa) promoted significantly seed germination of Suaeda rigida ， shorten average germination time,and reached quickly final germination rate to complete germination process.And its final germination rate was the highest,99%,significantly higher than the control.The moderate and severe drought (osmotic potentials were at range of -1.2 to -0.4 MPa) inhibited significantly seed germination of Suaeda rigida  .As external osmotic potential reducing,final germination rate of Suaeda rigid  seed showed a significant downward trend,average germination time was prolonged,reached final germination rate slowly ， and time for completing germination process was also prolonged.When the external osmotic potential was -1.2 MPa,its final germination rate was the lowest,only 28%.The threshold and limit of salt tolerant (NaCl) in Suaeda rigida seed  were 394.30 mmol/L and 894.30 mmol/L ， respectively.While the threshold and limit of drought tolerant (PEG-6000) in Suaeda rigida seed were -0.88 MPa and -1.79 MPa ， respectively. Suaeda rigida seed showed a higher salt and drought tolerance at germination stage.

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备注/Memo

第一作者简介：韩占江（1979-），男，黑龙江绥棱人，博士，副教授，现主要从事植物资源与抗逆生理等研究工作。E-mail：hanzhanjiang@126.com.基金项目：国家自然科学基金资助项目（31360055）；新疆生产建设兵团博士资金资助项目（2013BB008）；塔里木大学校长基金资助项目（TDZKBS201204）；国家级大学生创新创业训练计划资助项目（201310757006）。

更新日期/Last Update: 2015-04-09