不同盐处理对攀援卫矛和大叶黄杨生理效应的影响
2015-06-16郭栋
郭栋



摘 要:以一年生的攀援卫矛和大叶黄杨为试材,采用不同浓度NaCl 溶液浇灌其幼苗根部,测定分析不同浓度的盐溶液对二者生理指标的影响,结果表明:(1) 攀援卫矛和大叶黄杨叶片中的MDA含量随着盐浓度的升高而增加,经2.5%的盐胁迫处理后,二者叶片内丙二醛含量达最大值,与CK相比攀援卫矛高出132%,大叶黄杨高出118%;(2) 盐胁迫处理后,攀援卫矛和大叶黄杨叶片中脯氨酸含量变化表现为盐浓度越高,积累的脯氨酸含量越多;(3) 方差分析表明,攀援卫矛在NaCl浓度为1.5%时就表现出长势衰弱,而大叶黄杨在NaCl浓度2.0%以下生长良好,2.0%以上才显示出长势衰弱。研究认为,大叶黄杨的抗盐性较攀援卫矛更强,盐碱地生长的适应范围更广。
关键词:攀缘卫矛;大叶黄杨;盐胁迫;生理效应
中图分类号:S387.3; S792.115 文献标识码:A DOI 编码:10.3969/j.issn.1006-6500.2015.06.033
Abstract: Based on the annual living Euonymus kiautschoicus and Euonymus japonicas, by different density of NaCl solvent irrigation to the seeding root, to analyze effect of different density of solvent on photosynthesis. The results showed that (1) The MDA volume of Euonymus kiautschoiccus and Euonymus japomnicus raising up with NaCl density going up; MDA volume gets the peak at the circumstance of 2.5% NaCl salt stress, and compared with CK, the Euonymus kiautschoicus towers over 132%, Euonymus japonicas towers over 118%;(2)After the salt stress, the proline volume of the Euonymus kiautschoiccus and Euonymus japomnicus turns out the bigger density of NaCl solvent, the more the accumulation of pralines; (3)According to the analysis of variance, the Euonymus kiautschoiccus in the NaCl 1.5% salt stress, the growth turns out to be weakening, however, under NaCl 2.0% salt stress, the Euonymus japomnicus turns out to be good, in the circumstance of over NaCl 2.0%, the growth turns out weakening. In summary, the author considers that the salt resistance of Euonymus japomnicus is better than Euonymus kiautschoiccus, and Euonymus japomnicus is suitable for planting in saline-alkali soil.
Key words: Euonymus kiautschoicus;Euonymus japonicus;salt stress;photosynthesis
攀援卫矛(Euonymus kiautshovicus Loe.),卫矛科卫矛属半常绿灌木,为阳性树种,适应性强,根系发达,耐轻、中度盐碱,观赏效果好、用途广,是良好的绿篱用树,不仅适用于庭院、建筑物周围,也可用于主干道绿化带。因其对有毒气体抗性很强,且能吸收净化空气,所以是污染区理想的绿化树种[1]。
大叶黄杨(Euonymus japonicus Thunb.),卫矛科卫矛属常绿灌木或小乔木,温带及亚热带树种,产于我国中部和北部,它既喜欢在温暖湿润的气候条件下生长,又耐荫耐寒[2-5]。
我国盐碱土壤分布较广,且还在不断加重,如何开发利用大面积的盐碱地已经成为急迫的问题[6]。目前国内有不少使用攀援卫矛和大叶黄杨进行盐碱地治理和绿化改造的工程,但对其耐盐性研究的理论不多,因此研究它们在盐胁迫下的生长发育有着重要的科学理论意义。……
