CAJ | 학술논문

以外来入侵植物小花山桃草为试验材料,研究了不同浓度(0、50、100mmol/L)NaCl胁迫对其超氧化物歧化酶(SOD) 活性、叶绿素、脯氨酸和丙二醛(MDA)含量等的影响,探讨了这些生理指标的变化与小花山桃草耐盐性的关系.结果表明:随盐胁迫浓度的升高以及胁迫时间的延长,小花山桃草的超氧化物歧化酶(SOD)活性、叶绿素含量都有先升后降趋势;丙二醛(MDA)含量则先下降后上升;脯氨酸含量无明显变化.由此可知,短期低盐胁迫对小花山桃草生长有一定的促进作用,而在长时间胁迫条件下当盐分积累到一定程度后,小花山桃草生长受阻.这在一定程度上揭示了外来入侵植物小花山桃草抗逆性强的生理机制.
이외래입침식물소화산도초위시험재료,연구료불동농도(0、50、100mmol/L)NaCl협박대기초양화물기화매(SOD) 활성、협록소、포안산화병이철(MDA)함량등적영향,탐토료저사생리지표적변화여소화산도초내염성적관계.결과표명:수염협박농도적승고이급협박시간적연장,소화산도초적초양화물기화매(SOD)활성、협록소함량도유선승후강추세;병이철(MDA)함량칙선하강후상승;포안산함량무명현변화.유차가지,단기저염협박대소화산도초생장유일정적촉진작용,이재장시간협박조건하당염분적루도일정정도후,소화산도초생장수조.저재일정정도상게시료외래입침식물소화산도초항역성강적생리궤제.
Different levels of NaCl stress affected the content of superoxide dismutase (SOD), chlorophyll, proline, and malondialdehyde (MDA) in Gaura parviflora. The results showed that the activity of SOD and chlorophyll content were raised at beginning and then decreased with the increasing of NaCl concentration, while MDA content had contrary trend. We inferred that Gaura parviflora growth might be stimulated under low salt stress for short time. However, salt accumulation for a long time was unfavorable for them. These results provided a physiological mechanism of Gaura parviflora growth under low salt stress.Kew words: Gaura parviflora; Salt stress;Physiological characteristics