[1]李娅,李喻,杨秀莲,等.NaCl胁迫对不同种源海州常山生长及离子吸收、分配与运输的影响[J].江苏林业科技,2017,44(05):6-13.[doi:10.3969/j.issn.1001-7380.2017.05.002]
　LI Ya,LI Yu,YANG Xiu-lian,et al.Effects of NaCl stress on seedling growth and mineral ion uptake， distribution and transportation from different provenances of Clerodendrum trichotomum[J].Journal of Jiangsu Forestry Science &Technology,2017,44(05):6-13.[doi:10.3969/j.issn.1001-7380.2017.05.002]
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NaCl胁迫对不同种源海州常山生长及离子吸收、分配与运输的影响()
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《江苏林业科技》[ISSN:1001-7380/CN:32-1236/S]

卷:
第44卷
期数:
2017年05期
页码:
6-13
栏目:
试验研究
出版日期:
2017-10-31

文章信息/Info

Title:
Effects of NaCl stress on seedling growth and mineral ion uptake， distribution and transportation from different provenances of Clerodendrum trichotomum
文章编号:
1001-7380（2017）05-0006-08
作者:
李娅; 李喻; 杨秀莲; 岳远征; 王良桂*
南京林业大学 风景园林学院/风景园林江苏省重点实验室，江苏 南京 210037
Author(s):
LI Ya;  LI Yu;  YANG Xiu-lian;  YUE Yuan-zheng;  WANG Liang-gui*
College of Landscape Architecture, Key Laboratory of Landscape Architecture of Jiangsu Province, Nanjing Forestry University, Nanjing 210037, China
关键词:
NaCl; 胁迫; 种源; 海州常山; 离子平衡
Keywords:
NaCl;  Stress;  Provenance;  Clerodendrum trichotomum;  Ion homeostasis
分类号:
Q945.12； S793.9
DOI:
10.3969/j.issn.1001-7380.2017.05.002
文献标志码:
A
摘要:
以江西萍乡、山东平度、江苏盐城3个种源地的海州常山组织培养苗为材料，采用不同浓度NaCl进行胁迫处理，分析其对海州常山生长、离子选择吸收和运输的影响，探讨不同种源海州常山的耐盐差异和耐盐机理。结果表明：（1）NaCl胁迫下，海州常山生物量下降，含水量降低，生长受到抑制；（2）随着NaCl浓度上升，Na+的吸收为先升后降，高浓度NaCl胁迫下，江西萍乡种源Na+主要集中在叶柄中，而山东平度种源Na+主要集中在茎部；K+含量随着NaCl胁迫的增加呈下降的趋势，在叶片中含量较高；K+/Na+随NaCl浓度的增加呈下降趋势；（3）随着NaCl浓度增加，根系选择吸收系数SAK,Na、离子运输系数STK,Na先增后降（山东平度茎秆运输除外），总体而言，盐城种源SAK,Na，STK,Na的值大于其他种源，根抑制Na+、促进K+向地上部运输的能力也较其他种源强。综合分析表明：高浓度的盐胁迫对不同种源均产生不利影响，造成植物体内盐离子积累，但盐城种源保持体内离子平衡能力和耐盐性高于其他种源。
Abstract:
To understand the salt tolerance mechanisms, we studied the seedling growth and the absorption, distribution and translocation of mineral nutrients including Na+, K+and K+/Na+ in different organs of Clerodendrum trichotomum plantlets from three provenances (Pingxiang provenance from Jiangxi, Pingdu provenance from Shandong, and Yancheng provenance from Jiangsu) at different levels of NaCl stress. The results showed that under salt stress：(1) The growth of seedlings of the three provenances was significantly inhibited, and the biomass were restrained by salt stress. The water content and fresh weigh were decreased as the salt stress increased. (2)With salt stress increased, absorption of Na+ increased at first then decreased from the three provenances seedlings at high concentrations of salt from 160—200 mmol/L,with the content of Na+in Pingxiang higher that those in others, and Na+ in Pingxiang and Yancheng was concentrated in the petiole while that in Pingdu mainly in the stem; The K+ content was different from Na+content, absorption of K+ decreased in the organs of C. trichotomum, but K+ content in the leaves had remained a higher level; K+/Na+ in the organs of three provenances were decreased with the increase of salt concentration. (3) The SAK,Na and STK, Na values from C. trichotomum were increased at first, then decreased with the increasing salt stress except SK,Na of stem from Pingdu. Yancheng had more great selective transport capability of K+in root while Na+ was inhibited from being transported to stem. For these reasons, the significant difference of salt tolerance occurred in three provenances. Comprehensive analysis showed that the seedlings of C.trichotomum from three provenances were adversely affected by severe salt stress, resulting in the accumulation of salt ions in plants, but the ability of Yancheng to keep balance of ion in the plant was higher than those of Pingdu and Pingxiang, and the former also had stronger ability than the latters in salt tolerance．

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备注/Memo

备注/Memo:
收稿日期：2017-09-15;修回日期：2017-10-08
基金项目：江苏省农业科技自主创新资金项目“耐盐碱海州常山种质资源与创新利用”[CX（14）2031]；林业公益性行业科研专项“耐盐碱观赏海州常山种质资源收集和良种选育”（201404109）
作者简介：李娅（1992- ），女，四川达州人，硕士研究生。主要从事园林植物遗传育种研究工作。
*通信作者：王良桂（1963- ），男，安徽寿县人，教授，博士。主要从事植物栽培与应用、园林工程管理等工作。
更新日期/Last Update: 2017-11-21