论文范文网-权威专业免费论文范文资源下载门户!
当前位置:毕业论文格式范文>硕士论文>范文阅读
快捷分类:

关于棕榈论文范文 干旱胁迫对4种棕榈植物幼苗光合特性抗氧化酶活性影响相关论文写作参考文献

分类:硕士论文 原创主题:棕榈论文 更新时间:2024-03-04

干旱胁迫对4种棕榈植物幼苗光合特性抗氧化酶活性影响是关于棕榈方面的的相关大学硕士和相关本科毕业论文以及相关棕榈读音论文开题报告范文和职称论文写作参考文献资料下载。

摘 要 以4种棕榈植物幼苗为试材,通过盆栽控水试验,研究了干旱胁迫对其光合特性和抗氧化酶活性的影响.结果表明,随着干旱程度加剧,4种棕榈植物的净光合速率(Pn)、气孔导度(Gs)和蒸腾速率(E)均呈逐渐下降趋势,但下降幅度在不同种及不同胁迫处理之间存在差异.在轻度干旱胁迫下,气孔限制是皇后葵和砂糖椰子Pn下降的主要原因,而东澳棕和圆叶蒲葵Pn下降的主要原因是非气孔限制因素;在中度和重度干旱胁迫下,4种棕榈植物Pn下降的主要原因均为非气孔限制因素.4种棕榈植物的平均水分利用效率(WUE)依次为皇后葵>东澳棕>砂磄椰子>圆叶蒲葵.轻度干旱胁迫下4种植物的超氧化物歧化酶(SOD)、过氧化物酶(POD)和过氧化氢酶(CAT)活性均高于对照,中度和重度胁迫下均低于对照.复水后各处理均可恢复达对照水平.4种棕榈植物以皇后葵抗干旱能力最好,其次为东澳棕和砂糖椰子,圆叶蒲葵最差,对干旱环境最为敏感.

关键词 棕榈植物;干旱胁迫;光合作用;抗氧化酶

中图分类号 Q948 文献标识码 A

Abstract A pot experiment was conducted to study the effects of different drought stress(normal irrigation, light drought, moderate drought, and severe drought)on the photosynthetic characteristics and antioxidant enzymes of the seedling in four species(Syagrus romanzoffiana, Carpentaria acuminata, Arenga pinnata and the activities of Livistona rotundifolia)of Palmaceae family. The results showed that their net photosynthetic rate(Pn), stomatal conductance(Gs), and transpiration rate(E), compared with those under normal irrigation, gradually decreased with increasing drought stress. However, the reducing rates were different among the four species and different treatments. The intercellular CO2 concentration (Ci) decreased, and the stomatal limitation value(Ls)increased under light drought stress in S. romanzoffiana and A. pinnata,thus the decrease of their Pn was mainly caused by stomatal limitation. But when Ci increased, and Ls decreased under the same stress in C. acuminata and L. rotundifolia, therefore the decrease of these Pn was mainly caused by non-stomatal limitation. However, the Ci increased while Ls decreased under moderate and severe stress in the four species, thus decrease of all Pn examined was mainly caused by non-stomatal limitation. Water use efficiency(WUE)of the four species was: S. romanzoffiana>C. acuminata>A. pinnata >L. rotundifolia. Superoxide dismutase(SOD), peroxidase(POD), and catalase(CAT)activities of the four species increased under light drought stress, decreased under moderate and severe drought stress, and renewed their activities to the level of normal irrigation after re-watering in all treatments. Thereby, S. romanzoffiana possessed the. strongest capability against drought stress among the four species, then C. acuminata and A. pinnata, and lastly L. rotundifolia although L. rotundifolia possessed the best sensitivity to the drought environment.

Key words Palms;Drought stress;Photosynthesis;Antioxidant enzyme

doi 10.3969/j.issn.1000-2561.2016.10.011

总结:此文是一篇棕榈论文范文,为你的毕业论文写作提供有价值的参考。

参考文献:

1、 干旱胁迫下冠菌素(COR)对花生种子萌发和幼苗生长影响 摘 要:探讨适宜浓度冠菌素(COR)浸种提高花生幼苗抗旱性的作用效果,为COR在生产上应用提供依据。在正常水分和25%聚乙二醇(PEG)模拟干旱。

2、 4种常用药剂对枇杷黄毛虫田间防效 摘要 本文研究了4种常用药剂对枇杷黄毛虫的田间防治效。结果表明,8 000 IU mg苏云金杆菌悬浮剂、20%氰戊菊酯乳油、2 5%联苯菊酯乳油。

3、 4种食品防腐剂在铁皮石斛开放式组织培养中抑菌效果 摘 要 就4种食品防腐剂对铁皮石斛幼苗和原球茎在开放式组织培养中的抑菌效果进行试验。结果表明:尼泊金复合酯和肉桂酸钾具有较好的抑菌效果,0 12。

4、 4种药物对乌鳢急性毒性 摘 要:采用半静态试验方法研究了在水温(28 3±1 5)℃、pH(8 01±0 12)、溶氧(4 6±0 5)mg L条件下,敌百虫、高锰酸钾。

5、 大数据撼动供应链系统的4种方式 大数据分析能够提高可见性,让人们更直观地知道东西在哪里、应该在哪里,以及系统出了什么问题。大数据越来越流行,我们不能视而不见,因为有充足的理由。

6、 干旱胁迫下黄腐酸钾对烤烟幼苗保水渗透调节能力影响 摘 要:为揭示黄腐酸钾(FA-K)在烟草上缓解干旱胁迫伤害的作用、机理及施用技术,在PEG-6000(聚乙二醇)模拟干旱胁迫的营养液培养条件下,。