[1]龚佳,倪细炉*,李健. NaHCO3胁迫对宁夏4种灌木生长及光合特性的影响[J].西北林学院学报,2017,32(2):8-15.[doi:10.3969/j.issn.1001-7461.2017.02.02]
　GONG Jia,NI Xi-lu*,LI Jian. Effects of NaHCO3 Stress on the Growth and Photosynthetic Characteristics of Four Shrubs in Ningxia[J].JOURNAL OF NORTHWEST FORESTRY UNIVERSITY,2017,32(2):8-15.[doi:10.3969/j.issn.1001-7461.2017.02.02]
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 NaHCO3胁迫对宁夏4种灌木生长及光合特性的影响()
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《西北林学院学报》[ISSN:1001-7461/CN:61-1202/S]

卷:
第32卷
期数:
2017年第2期
页码:
8-15
栏目:
出版日期:
2017-03-31

文章信息/Info

Title:
 Effects of NaHCO3 Stress on the Growth and Photosynthetic Characteristics of Four Shrubs in Ningxia
文章编号:
1001-7461(2017)02-0008-08
作者:
 龚佳1; 2; 倪细炉2*; 李健2
 （1.宁夏大学 生命科学学院，宁夏 银川 750021；2.宁夏林业研究院 种苗生物工程国家重点实验室，宁夏 银川 750004）
Author(s):
 GONG Jia1; NI Xi-lu2*; LI Jian2
 (1.College of Life Science,Ningxia University,Yinchuan,Ningxia 750021,China; 2.Ningxia Forestry Institute,State Key Laboratory of the Seedling Bioengineering,Ningxia Forestry Institute,Yinchuan,Ningxia 750004,China)
关键词:
 ; NaHCO3胁迫; 生长; 生理特性; 耐盐性
Keywords:
 ; NaHCO3 stress;  growth;  physiology characteristic;  salt tolerance
分类号:
S718
DOI:
10.3969/j.issn.1001-7461.2017.02.02
文献标志码:
A
摘要:
 采用盆栽方法，以4个树种实生幼苗为材料，对不同浓度（0,250,500,750 mmol·L-1和1 000 mmol·L-1）NaHCO3胁迫下各树种的形态表现、生长及生理特性进行研究，比较4种植物耐盐性大小。结果表明，1）随着NaHCO3浓度的增加，4种植物幼苗的生长明显受到抑制，株高、生物积累量减少，净光合速率、蒸腾速率和叶绿素相对值降低，按降幅大小排列为黑果枸杞<柽柳<银水牛果<沙棘；2）随胁迫时间的延长，黑果枸杞和柽柳幼苗叶片的净光合速率在≤500 mmol·L-1的处理下先降低后回升，表明植物已经适应了该浓度的胁迫，具有较强的NaHCO3耐受性；3）低浓度（≤500 mmol·L-1）NaHCO3处理下沙棘和银水牛果通过增加根冠比提高对胁迫的抗性，高浓度（>500 mmol·L-1）处理下根冠比的增加不明显，黑果枸杞和柽柳在不同胁迫浓度之间根冠比值变化幅度较小，基本保持一致；4）综合分析4种植物的生长及生理指标，进行回归分析求得4种植物的耐盐阈值分别为黑果枸杞600 mmol·L-1、沙棘303 mmol·L-1、银水牛果470 mmol·L-1、柽柳516 mmol·L-1。比较得出4种植物的耐盐性大小为黑果枸杞>柽柳>银水牛果>沙棘。
Abstract:
 A pot experiment was carried out to investigate the NaHCO3 stress on the growth and photosynthetic characteristics of 4 shrub species,Lycium ruthenicum,Hippophae rhamnoides,Shepherdia argentea and Tamarix chinensis.Five different levels of NaHCO3 were set:0,250,500,750,and 1 000 mmol·L-1.The results showed that 1) with the increase of NaHCO3 concentration,the seedling growth was obviously inhibited.The plant height and biomass accumulation decreased，as well as net photosynthetic rate (Pn),transpiration rate and chlorophyll relative value.The decreasing amplitude of the growth index of four plants was in the order of L.ruthenicum<T.chinensis<S.argentea<H.rhamnoides.2) With the increase of salt-stress time,when the salt concentration was less than 500 mmol·L-1,Pn of L.ruthenicum and T.chinensis decreased at first and then increased,showing that plants had adapted to the NaHCO3 concentration,and the L.ruthenicum and T.chinensis also showed relatively high NaHCO3 tolerance.3) Under the lower concentration of NaHCO3 treatment,S.argentea and H.rhamnoides improved the NaHCO3 tolerance by increasing root/shoot ratio,L.ruthenicum and T.chinensis changed not obviously among different treatments.4) The salt tolerance threshold for L.ruthenicum was 600 mmol·L-1,516 mmol·L-1 for T.chinensis,470 mmol·L-1 for S.argentea and 303 mmol·L-1 for H.rhamnoides.Based on the analysis of growth and photosynthetic characteristics,the NaHCO3 tolerance of four plants were L.ruthenicum > T.chinensis >S.argentea > H.rhamnoides.

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备注/Memo

备注/Memo:
 收稿日期：2016-08-16修回日期：2016-09-28
基金项目：国家科技攻关项目“宁夏主要退化土壤生态修复关键技术合作研究”（2015DFA90900）。
作者简介：龚佳，女，硕士，研究方向：逆境生理学。
*通信作者：倪细炉，男，博士，副研究员，研究方向：植物生理生态学。E-mail:hixilu110@163.com
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