盐胁迫对杨树形成层过氧化物酶活性及其效应的影响

应用生态学报 ›› 2003, Vol. ›› Issue (6): 871-874.

盐胁迫对杨树形成层过氧化物酶活性及其效应的影响

李国旗^1,2, 安树青¹, 张纪林³, 李瑾¹, 王云静¹, 孙经林⁴

1. 南京大学生物科学与技术系, 南京 210093;
2. 宁夏大学生命科学院, 银川 750021;
3. 江苏省林业科学研究所, 南京 211153;
4. 江苏省如东县林业局, 如东 226400

收稿日期:2001-03-28 修回日期:2002-01-07
通讯作者: 李国旗,男,1968年生,博士,副研究员,主要从事生理生态和应用生态学研究,发表论文16篇.E-mail:ligq@nxu.edu.cn.
基金资助:
国家“九五”重点科技攻关资助项目(960070305)

Impact of salt stress on peroxidase activity in Populus deltoides cambium and its consequence

LI Guoqi^1,2, AN Shuqing¹, ZHANG Jilin³, LI Jin¹, WANG Yunjing¹, SUN Jinglin⁴

1. Department of Biological Science and Technology, Nanjing University, Nanjing 210093, China;
2. Biological Science and Technology Department of Ningxia University, Yinchuan 750021, China;
3. Jiangsu Institute of Forestry Science Research, Nanjing 211153, China;
4. Forest Office of Rudong County, Rudong 226400, China

Received:2001-03-28 Revised:2002-01-07

摘要/Abstract

摘要： 研究了盐胁迫对杨树形成层中过氧化物酶(POD)活性和杨树次生木质部解剖特征的影响,结果表明,POD活性受盐胁迫影响在休眠期和生长期有不同的表现.处于休眠期的杨树,在较低的土壤含盐量下,随着含盐量的升高,POD活性呈现出先升高后降低的趋势,即含盐量0.024%→0.094%→0.145%,POD活性的变化83.7→132.1→63.2units·min^-1·g^-1FW;而生长期的杨树,POD活性受到盐胁迫的抑制而降低,当含盐量0.036%→0.289%逐步升高时,POD活性405.2→107.2units·min^-1·g^-1FW逐步降低.盐胁迫下杨树的解剖特征呈现规律性变化,当含盐量0.036%→0.125%→0.289%升高,早材和晚材导管直径变化分别为41.8→56.6→43.4μm和29.1→33.1→33.1μm;早材和晚材导管频率的变化分别为141.8→113.8→144.2个·mm^-2和160.0→134.8→206.7个·mm^-2.含盐量0.0365→0.289%升高,纤维长度和宽度的变化分别为693.8→570.4μm和14.9→13.5μm.

关键词: 土壤盐度, 过氧化物酶, 生态解剖, 输水性能, 材质

Abstract: Studies on the impact of salt stress on the peroxidase (POD) activity in Populus deltoides cambium and on the anatomic characteristics of its secondary xylem indicated that the changes of PODactivity caused by soil salinity stress behaved differently in dormant and growing period. In low salinity soil, the POD activity of dormant Populus deltoides showed the trend of increasing first,and then,decreasing as the soil salinity was rising gradually.Namely, with the rising of soil salinity in the range of 0.024→0.094→0.145%,the POD activity varied in the range of 83.7→132.1→63.2 units·min^-1 ·g^-1 FW accordingly.However,in growing season, with the gradual increase of soil salinity from 0.036 to 0.289%, the POD activity decreased gradually from 405.2 to 107.2 units·min^-1 ·g^-1 FW.There were regular changes in wood anatomic characteristics of Populus deltoides . Namely,with the increase of soil salinity 0.036→0.125→0.289%, the vessel diameters (VD) of both early wood and late wood varied accordingly in the range of 41.8→56.6→43.4 μm,and 29.1→33.1→33.1 μm, respectively.The vessel frequencies (VF) were 141.8→113.8→144.2 and 160.0→134.8→206.7 entries mm^-2, respectively. Along with the gradual increase of soil salinity from 0.036 to 0.289%, the fiber length gradually decreased from 693.8 to 570.4 μ m, and the fiber width decreased from 14.9 to 13.5 μm.

Key words: Soil salinity, Peroxidase(POD), Ecological anatomy, Water conductance, Wood quality

中图分类号:

Q948.113

李国旗, 安树青, 张纪林, 李瑾, 王云静, 孙经林. 盐胁迫对杨树形成层过氧化物酶活性及其效应的影响[J]. 应用生态学报, 2003, (6): 871-874.

LI Guoqi, AN Shuqing, ZHANG Jilin, LI Jin, WANG Yunjing, SUN Jinglin. Impact of salt stress on peroxidase activity in Populus deltoides cambium and its consequence[J]. Chinese Journal of Applied Ecology, 2003, (6): 871-874.

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