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盐胁迫对北沙参生长及生理特性的影响被引量:11
2014年
为了研究北沙参对盐胁迫的响应,利用不同比例盐碱土栽培和不同浓度盐水浇灌处理,检测其生物生长量,以及叶片组织叶绿素a、叶绿素b、总叶绿素、胡萝卜素及丙二醛含量等。结果表明,低比例盐碱土和低浓度盐水对北沙参生长量和叶绿素含量影响不大,高比例盐碱土和高浓度盐水明显降低北沙参的生长量和叶片叶绿素含量,并且盐分胁迫对叶绿素a含量的影响大于对叶绿素b的影响,盐胁迫对胡萝卜素含量的影响不大。当盐碱土比例超过1/2时,北沙参生长受到明显抑制,叶绿素含量显著降低;当盐浓度超过9 g/L时,北沙参生长受到明显抑制,叶绿素含量显著降低。叶片组织丙二醛的含量随盐浓度的增加而升高。
彭英刘晓静汤兴利徐道华吴群杜凤凤周义峰
关键词:北沙参盐胁迫生长量叶绿素丙二醛
Effects of Light, Fertilizer and Irrigation on Growth and Physiological Characteristics of Glehnia littoralis被引量:1
2014年
The aim was to promote the cultivation and application of medicinal plants Glehnia littoralis. [Method] Glehnia littoralis was used as experi-mental materials in this study, and orthogonal design was performed to investigate the effects of light, fertilizer and irrigation on the growth of Glehnia littoralis. The biomass, leaf chlorophyl and malondialdehyde (MDA) content were determined to study its response to light, fertilizer and irrigation. [Result] The results showed that the optimum cultivation conditions of Glehnia littoralis were not completely consistent with wild living environments. Lightly shade, highly fertilization (21.38-32.08 g) and proper irrigation (500-750 ml) were suitable for artificial cultivated Glehnia littoralis. Under the condition, the biomass was enhanced, leaf chlorophyl and carotene con-tent were increased, and MDA content changed significantly. Under stress condi-tions, the biomass of Glehnia littoralis reduced, with the decrease of chlorophyl and carotenoid content. The content of chlorophyl a was more sensitive to the variation of light, fertilizer, irrigation and other environmental factors, and MDA content signifi-cantly increased by stress conditions. [Conclusion] This research can provide refer-ence for large-scale artificial cultivation of Glehnia littoralis.
彭英汤兴利莫日江吴群周义峰
关键词:IRRIGATIONBIOMASSMDA
红掌两个bZIPs基因片段的克隆与低温响应特性分析
2015年
本研究以红掌‘Alabama’幼苗为材料,克隆了2个b ZIP转录因子基因Aab ZIP1和Aab ZIP2。Aab ZIP1片段长度462 bp,Aab ZIP2片段长度为369 bp,两基因核苷酸序列的相似度为46.97%,推定的氨基酸序列相似性为31.17%。Blastx发现两个基因均具有亮氨酸拉链的保守结构域,具备b ZIP转录因子家族的基本特征。RT-PCR分析检测表明,低温处理后,Aab ZIP1基因为组成型表达,不响应低温胁迫;Aab ZIP2基因表达受低温诱导,其表达强度随着低温处理时间的延长而增强,Aab ZIP2可能在红掌的低温胁迫响应过程中起重要作用。
彭英杜凤凤田丹青潘晓韵刘晓静
关键词:红掌BZIP亮氨酸拉链克隆
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