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[1]薛志慧 王炫臻 赵静怡 柯子星 孙威江**.两种基因型茶树新梢形态及叶片超微结构差异对其吸收累积稀土镧的影响[J].应用与环境生物学报,2020,26(04):1-12.[doi:10.19675/j.cnki.1006-687x.2019.09024]
 XUE Zhihui,WANG Xuanzhen,ZHAO Jingyi,et al.Shoot morphology and leaf ultrastructure of two genotypes of tea and their effect on rare earth lanthanum adsorption *[J].Chinese Journal of Applied & Environmental Biology,2020,26(04):1-12.[doi:10.19675/j.cnki.1006-687x.2019.09024]
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两种基因型茶树新梢形态及叶片超微结构差异对其吸收累积稀土镧的影响()
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《应用与环境生物学报》[ISSN:1006-687X/CN:51-1482/Q]

卷:
26卷
期数:
2020年04期
页码:
1-12
栏目:
研究论文
出版日期:
2020-08-25

文章信息/Info

Title:
Shoot morphology and leaf ultrastructure of two genotypes of tea and their effect on rare earth lanthanum adsorption *
作者:
薛志慧1234 王炫臻2 赵静怡2 柯子星2 孙威江1234**
1福建农林大学园艺学院 福州 350002
2福建农林大学安溪茶学院 福州 350002
3福建省茶产业工程技术研究中心 福州 350002
4福建茶产业技术开发基地 福州 350002
Author(s):
XUE Zhihui1234 WANG Xuanzhen 2 ZHAO Jingyi2 KO?Tzuhsing2 & SUN Weijiang1234**
1 College of Horticulture, Fujian Agriculture and Forestry University , Fuzhou 350002, China
2 Anxi College of Tea Science, Fujian Agriculture and Forestry University , Fuzhou 350002, China
3 Tea Industry Technology Development Base of Fujian Province, Fuzhou 350002,China
4 Tea Industry Engineering Technology Research Center of Fujian Province, Fuzhou 350002,China
关键词:
稀土基因型超微结构
Keywords:
rare earth lanthanum tea genotypes ultrastructure
DOI:
10.19675/j.cnki.1006-687x.2019.09024
摘要:
不同基因型茶树品种对稀土的积累有显著性差异,但产生差异的生理机制仍不清楚。本试验采用室内营养液培养法,对比研究稀土高/低积累基因型茶树品种铁观音和水仙在不同浓度稀土镧溶液(0.08 mmol/L、0.4 mmol/L和1.2 mmol/L)处理下的镧吸收量、生长发育以及叶片细胞超微结构的变化反应。结果显示,随着镧浓度的升高,不同叶位镧吸收量呈现出先降低后升高的规律,1.2 mmol/L镧浓度下,水仙品种不同叶位叶片镧积累量是铁观音的0.3~1.7倍。低浓度稀土镧处理下,两个品种茶树生长旺盛,新梢多为正常成熟新梢;高浓度处理下植株矮小,叶色黄绿,失去光泽,新梢生长和发育迟缓。扫描电镜观察发现低浓度稀土镧处理下细胞变化与对照相比差异不大,高浓度处理下叶片细胞褶皱明显,气孔周围蜡质增多。两个品种相比,铁观音较水仙蜡质覆盖量少,气孔密度大,受害程度较小,铁观音表现出较强的耐受性。透射电镜观察发现,高浓度稀土镧处理下两个茶树品种叶片细胞器受损,细胞质组分流失,水仙较铁观音受害程度严重。本研究表明,水仙品种更容易受到稀土镧的毒害作用,铁观音表现出较强的耐性。该研究初步了解不同茶树品种对稀土的生理反应差异,为茶树稀土低积累品种的筛选提供研究基础。(图7 表1 参27)
Abstract:
The accumulation of rare earths in different genotypes of tea trees is confirmed to show a significantly different. Unfortunately, the effect of accumulation of rare earths on the physiological mechanism of tea trees is unclear. In this study, two tea tree varieties ( Shuixian and Tieguanyin) were chosen as candidates to understand the La adsorption amount, growth condition, and the changes in ultrastructure of leaf cell under various concentrations of La (0.08 mmol/L, 0.4 mmol/L and 1.2 mmol/L) by using indoor nutrient fluid cultural method. The results showed that with the increase in La concentration, the absorption amount of La decreased firstly and then increased at different leaf positions. Under the concentration of La at 1.2 mmol/L, the accumulation amount of La at different leaf positions of Shuixian species was 0.3-1.7 fold higher than that of Tieguanyin. Under low concentration of La, the growth condition was vigorous and the new shoots were in mature and health condition for both tea tree varieties. In high concentration of La treatment, the plants were shorter, yellowish-green in color with tarnish were obviously observed as well as the growth development of new shoots delayed. From the observation of scanning electron microscope, no significant difference was observed between cell structure for control sample and low-concentration La treated sample, whereas the cell wrinkles markedly emerged and wax were grown around the stomata under higher concentration of La treatment. Compared with the two varieties, Tieguanyin had less wax coverage, larger stomatal density, and less damage whereas the Tieguanyin showed stronger tolerance. Transmission electron microscope observation showed that the leaf organelles of two tea varieties were damaged and cytoplasmic components were lost in high concentration of La treatment, in particular to Shuixian species.This study showed that the narcissus species is susceptible to be poisoned by La metal and Tieguanyin showed stronger tolerance. This investigation explored the preliminary understanding regarding the physiological reactions of different tea tree varieties to rare earths, furthermore provided useful information for screening the low rare earths accumulation tea tree.

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备注/Memo

备注/Memo:
收稿日期 Received: 2019-09-10 接受日期 Accepted: 2019-12-04
福建省自然科学基金项目(2016J01696)、福建农林大学科技创新专项(CXZX2016003)、安溪茶学院青年基金项目(ACKY2015003、ACKY2016005)资助
**通讯作者 Corresponding author (E-mail: swj8103@126.com)
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更新日期/Last Update: 2020-01-14