摘要
采用盆栽技术,研究了木本蔬菜香椿对不同质量浓度(0、100、200、400、800mg/kg)Cu2+胁迫的响应。结果表明,低质量浓度(≤200mg/kg,下同)的Cu2+胁迫可促进香椿的生长,在高质量浓度(≥200mg/kg,下同)Cu2+胁迫下香椿的芽长、冠幅、株高增长受到抑制;随着Cu2+胁迫浓度的升高,香椿叶片中的叶绿素a、叶绿素b含量先升高后降低,丙二醛(MDA)含量先降低后升高,可溶性蛋白含量先降低后升高而后又降低,可溶性糖含量先降低后升高;随着Cu2+胁迫浓度的升高,综合香椿体内的叶绿素、MDA、可溶性蛋白、可溶性糖、有机酸、维生素C含量变化结果可知,香椿对低浓度的Cu2+胁迫具有一定的抗逆性,但是高浓度的Cu2+胁迫会对香椿的生长及叶片品质产生负面影响。
Woody vegetable, Toona sinensis, was exposed to 0, 100, 200, 400, 800 mg/kg of Cu2＋ to study the stress on its seedling growth and leaf quality. Low concentrations （4200 mg/kg） of Cu2＋ stress could promote the growth of Toona sinensis. But the bud length, crown width and plant height of Toona sinensis were inhibited at high Cu2＋ stress （;200 mg/kg）. With the increase of Cu2; concentration, the content of chlorophyll a, chlorophyll b in leaves increased first and then decreased, while the content of malondialdehyde （MDA） presented the different tendency, so as the soluble sugar; for soluble protein of Toona sinensis, it was finally decreased before a certain fluctuation. From the response of Toona sinensis to Cu2＋ stress, it had some resistance to the low concentration of Cu2＋ stress, but the high concentration of Cu2＋stress still had negative effect on its growth and leaf quality.
出处
《环境污染与防治》
CAS
CSCD
北大核心
2013年第4期38-42,共5页
Environmental Pollution & Control
基金
天津市科技支撑计划重点项目(No.12ZCZDNC00400)
天津市农业科技成果转化与推广项目(No.0801160)
关键词
木本蔬菜
香椿
铜胁迫
生长
woody vegetable
Toona sinensis
copper stress
growth
