| 澳洲茶树对淹水胁迫的生长和生理响应 |
| |
| 引用本文： | 刘正兴,肖玉菲,莫云善,陈博雯,覃子海,张烨,张晓宁,覃玉凤,刘海龙.澳洲茶树对淹水胁迫的生长和生理响应[J].广西林业科学,2020(1):81-85. |
| |
| 作者姓名： | 刘正兴 肖玉菲 莫云善 陈博雯 覃子海 张烨 张晓宁 覃玉凤 刘海龙 |
| |
| 作者单位： | 广西国有钦廉林场;广西壮族自治区林业科学研究院/国家林业和草原局中南速生材繁育实验室/广西优良用材林资源培育重点实验室 |
| |
| 基金项目： | 广西科技计划项目(桂科AD18281083;桂科AB18221058);广西林业科技推广示范项目(gl2018kt09);广西林科院基本科研业务费专项(林科201812号)。 |
| |
| 摘 要： | 以1年生澳洲茶树(Melaleuca alternifolia)组培苗为研究对象,采用双套盆法进行盆栽淹水试验,研究淹水胁迫对澳洲茶树生长和生理特性的影响,为其推广种植提供理论依据。结果表明,淹水60 d内叶片不萎蔫,苗木成活率为100%,但苗木生长速度受到一定程度的抑制;过氧化物酶(POD)活性随淹水时间的增加逐渐提高,为淹水胁迫的主要响应酶;超氧化物歧化酶(SOD)活性前10 d波动升高,之后整体呈波动下降的趋势;过氧化氢酶(CAT)活性前16 d较高;硝酸还原酶(NR)活性18~30 d时较高;谷胱甘肽过氧化物酶(GSH-PX)活性呈先升高后下降的趋势,前38 d活性较高;丙二醛(MDA)含量呈连续M型变化后降为胁迫前的水平;脯氨酸含量在16 d时急剧上升;可溶性糖含量呈先增加后降低的趋势。澳洲茶树具有较强的耐涝性,可通过提高保护酶活性和调节代谢逐渐适应淹水环境,但生长速度较慢,为保证其生长速度,在淹水时应及时排水。
|
| 关 键 词： | 生理响应 淹水胁迫 澳洲茶树 双套盆法 |
Growth and Physiological Response of Melaleuca alternifolia to Flooding Stress |
| |
| Liu Zhengxing,Xiao Yufei,Mo Yunshan,Chen Bowen,Qin Zihai,Zhang Ye,Zhang Xiaoning,Qin Yufeng,Liu Hailong.Growth and Physiological Response of Melaleuca alternifolia to Flooding Stress[J].Guangxi Forestry Science,2020(1):81-85. |
| |
| Authors: | Liu Zhengxing Xiao Yufei Mo Yunshan Chen Bowen Qin Zihai Zhang Ye Zhang Xiaoning Qin Yufeng Liu Hailong |
| |
| Institution: | (Guangxi State-owned Qinlian Forest Farm,Qinzhou,Guangxi 535000,China;Guangxi Forestry Research Institute,Key Laboratory of Central South Fast-growing Timber Cultivation of National Forestry and Grassland Administration,Guangxi Key Laboratory of Superior Timber Trees Resource Cultivation,Nanning,Guangxi 530002,China) |
| |
| Abstract: | Taking 1-year-old tissue culture seedlings of Melaleuca alternifolia as materials, experiment of water flooding was carried out by using double-set pot method to study influences of flooding stress on growth and physiological characteristics of M. alternifolia, which could provide theoretical basis for popularization of M. alternifolia. Results showed that within 60 d of flooding, leaves were not wilted, and survival rate of seedlings was100%. But growth speed of seedlings was inhibited to some extent. POD activity gradually increased with increase of flooding time, which was the main response enzyme to flooding stress. SOD activity increased in early10 d, and then showed a trend of fluctuation and decline. CAT activity was higher before 16 d. NR activity was higher in 18-30 d. GSH-PX activity increased firstly and then decreased, with higher activity before 38 d.MDA content showed continuous M-type changes and then decreased to level before stress. Proline content increased sharply at 16 d. Soluble sugar content increased firstly and then decreased. M. alternifolia had strong flooding resistance, which could gradually adapt to flooding environment by improving activities of protective enzymes and regulating metabolism, but growth speed was slow. In order to ensure growth speed, drainage in time should be done when M. alternifolia grew in flooding environment. |
| |
| Keywords: | physiological response water flooding stress Melaleuca alternifolia double-set pot |
| 本文献已被 CNKI 维普 等数据库收录！ |
|
