研究论文

干旱胁迫对5种园林乔木幼苗根系形态的影响

  • CHEN Xiao-xi ,
  • ZHANG Yan-jing ,
  • LAI Can ,
  • WU Jia ,
  • TAN Can-can ,
  • GUO Wei ,
  • ZHAN Guo-qiang ,
  • SUN Yan-jun
展开
  • (1. 广东生态工程职业学院,广东 广州 510520;2. 深圳坤元生态科技有限公司,广东 深圳 518000;3. 仲恺农业工程学院,广东 广州 510225)

收稿日期: 2024-09-09

  录用日期: 2024-11-07

  网络出版日期: 2025-03-20

基金资助

广东省林业科技创新项目“珠三角森林城市群质量提升关键技术研究” (2021KJCX009);广东省普通高校创新团队项目(2024KCXTD078)

Effects of Drought Stress on Root Morphological in Seedlings of Five Species of Garden Plants

  • 陈晓熹,张炎晶,赖 灿,伍 佳,谭灿灿,郭 微,战国强,孙延军
Expand
  • (1. Guangdong Ecological Engineering Vocational College, Guangzhou 510520,Guangdong China; 2. Shenzhen Kunyuan Ecological Technology Co., Ltd., Shenzhen 518000,Guangdong China; 3. Zhongkai University of Agriculture and Engineering, Guangzhou 510225,Guangdong China)

Received date: 2024-09-09

  Accepted date: 2024-11-07

  Online published: 2025-03-20

摘要

为探究干旱胁迫对城市树木根系形态的影响,以二年生凤凰木Delonix regia、火焰木Spathodea campanulata、樟Camphora officinarum、小叶榄仁Terminalia neotaliala和美丽异木棉Ceiba speciosa幼苗为研究对象,比较不同干旱胁迫强度下根系形态变化。结果表明,随干旱胁迫强度增加,CK相比中、重度干旱处理下的樟总根长、平均连接长度显著减小,分支密度显著增大(P<0.05);小叶榄仁平均连接长度显著减小,分支密度显著增大。干旱胁迫下大部分根系构型指标间呈极显著相关性(P<0.01)。特别是在重度干旱处理下,总根长与分支数的相关性更加紧密,表明在极端胁迫条件下,植物的生长策略和资源分配模式可能发生显著变化,从而影响根系特征间的相互关系。通过主成分分析和最大方差轮换法,筛选出对干旱胁迫敏感的树木根系形态指标为分支数、总根长和交叉数,5种乔木根系形态综合得分排序为小叶榄仁>凤凰木>樟>火焰木>美丽异木棉。

本文引用格式

CHEN Xiao-xi , ZHANG Yan-jing , LAI Can , WU Jia , TAN Can-can , GUO Wei , ZHAN Guo-qiang , SUN Yan-jun . 干旱胁迫对5种园林乔木幼苗根系形态的影响[J]. 亚热带植物科学, 2024 , 53(6) : 520 -526 . DOI: 10.3969/j.issn.1009-7791.2024.06.004

Abstract

This study investigated the effects of drought stress on the root morphological of urban trees. Two-years-old seedlings of Delonix regia, Spathodea campanulata, Camphora officinarum, Terminalia neotaliala and Ceiba speciosa were used as research subjects. And the changes in root morphology were compared across the different levels of drought stress. The results showed that with the increase of drought stress intensity, the total root length and average connection length of C. officinarum under CK treatment were significantly reduced compared to M and S treatment, and the branch density was significantly increased (P<0.05); The average connection length of T. neotaliala significantly decreased, and the branch density significantly increased. Under drought stress, most root architecture indicators showed a highly significant correlation (P<0.01). As drought stress increased, the correlations among root traits also intensified, particularly under severe drought conditions, where a strong correlation was observed between total root length and the number of root forks. This indicated that under drought stress, tree resource allocation patterns may change significantly, affecting the interrelationships among various root traits. Using principal component analysis (PCA) and maximum variance rotation, the primary structural indicators identified were the number of root forks, total root length, and root crossings. The comprehensive scores of the species in response to drought stress were ranked in descending order as follows: Terminalia neotalialaDelonix regiaCamphora officinarumSpathodea campanulataCeiba speciosa.

参考文献

[1] 张立恒, 王学全, 贾志清, 李清雪, 陈新均. 高寒沙地不同林龄中间锦鸡儿人工林根系分布特征[J]. 干旱区资源与环境, 2018, 32(11): 163–168.

[2]  Wang C, Ma Y, Trogisch S, Huang Y, Geng Y, Scherer–Lorenzen M, He J. Soil respiration is driven by fine root biomass along a forest chronosequence in subtropical China[J]. Journal of Plant Ecology, 2017, 10(1): 36–46.

[3]  Fang S, Clark R, Liao H. 3D quantification of plant root architecture in situ [M]// Measuring Roots: An Updated Approach. Berlin: Springer Nature, 2012: 135–148.

[4]  Kiswara W, Behnke N, van Avesaath P, Huiskes AHL, Erftemeijer PLA, Bouma TJ. Root architecture of six tropical seagrass species, growing in three contrasting habitats in Indonesian waters [J]. Aquatic Botany, 2009, 90(3): 235–245.

[5]  Di Carlo G, Badalamenti F, Terlizzi A. Recruitment of Posidonia oceanica on rubble mounds: Substratum effects on biomass partitioning and leaf morphology [J]. Aquatic Botany, 2007, 87(2): 97–103.

[6]  杜建会, 刘安隆, 董玉祥, 胡绵友, 梁杰, 李薇. 华南海岸典型沙生植物根系构型特征[J]. 植物生态学报, 2014, 38(8): 888–895.

[7]  李秉钧, 颜耀, 吴文景, 吴鹏飞, 邹显花, 马祥庆. 环境因子对植物根系及其构型的影响研究进展[J]. 亚热带水土保持, 2019, 31(3): 41–45.

[8]  单立山, 李毅, 任伟, 苏世平, 董秋莲, 耿东梅. 河西走廊中部两种荒漠植物根系构型特征[J]. 应用生态学报, 2013, 24(1): 25–31.

[9]  Ghani M A, Stokes A, Fourcaud T. The effect of root architecture and root loss through trenching on the anchorage of tropical urban trees (eugenia grandis wight) [J]. Trees, 2009, 23(2): 197–209.

[10]  刘晓娟. 根域限制对牡丹花器官碳代谢的影响[J]. 河南农业大学学报, 2017, 51(2): 170–176.

[11]  蔡施泽, 乐笑玮, 谢长坤, 车生泉. 3种上海市常见古树粗根系分布特征及保护对策[J]. 上海交通大学学报(农业科学版), 2017, 35(4): 7–14.

[12]  Smith S, De Smet I. Root system architecture: insights from Arabidopsis and cereal crops [J]. Philosophical Transactions of The Royal Society B, 2012, 367(1595): 1441–1452.

[13]  In’t Zandt D, Le Marié C, Kirchgessner N, Visser E, Hund A. High-resolution quantification of root dynamics in split- nutrient rhizoslides reveals rapid and strong proliferation of maize roots in response to local high nitrogen [J]. Journal of Experimental Botany, 2015, 66(18): 5507–5517.

[14]  许丽丽, 孟新亚, 尤燕平, 宋希强, 陈耀丽, 钟云芳. 血叶兰幼苗对干旱胁迫的生理响应及其抗旱性指标筛选[J]. 亚热带植物科学, 2024, 53(1): 12–21.

[15]  陈拓, 冯虎元, 徐世建, 强维亚, 安黎哲. 荒漠植物叶片碳同位素组成及其水分利用效率[J]. 中国沙漠, 2002, 22(3): 288–291.

[16]  刘锦春, 钟章成. 干旱胁迫和复水对石灰岩地区柏木幼苗根系生长的影响[J]. 生态学报, 2009, 29(12): 6439–6445.

[17]  郑淼, 郭毅, 王丽敏. 水分调亏对银杏幼苗根系生长发育和光合特性的影响[J]. 山东农业大学学报(自然科学版), 2021, 52(3): 430–435.

[18]  吴敏, 张文辉, 周建云, 马闯, 韩文娟. 干旱胁迫对栓皮栎幼苗细根的生长与生理生化指标的影响[J]. 生态学报, 2014, 34(15): 4223–4233.

[19]  祁军. 土壤湿度对香樟幼苗根系生长和构型的影响[J]. 亚热带植物科学, 2022, 51(1): 19–25.

[20]  袁梦琦, 王梅芳, 李黎明, 檀婷婷, 兰雪涵, 杜凤国. 干旱胁迫对豚草种子萌发及幼根生长的影响[J]. 植物检疫, 2021, 35(6): 27–32.

[21]  杨振亚, 周本智, 陈庆标, 葛晓改, 王小明, 曹永慧, 童冉, 石洋. 干旱对杉木幼苗根系构型及非结构性碳水化合物的影响[J]. 生态学报, 2018, 38(18): 6729–6740.

[22]  张翠梅, 师尚礼, 刘珍, 杨帆, 张振科. 干旱胁迫对不同抗旱性苜蓿品种根系形态及解剖结构的影响[J]. 草业学报, 2019, 28(5): 79–89.

[23]  Walk T C. Modeling applicability of fractal analysis to efficiency of soil exploration by roots [J]. Annals of Botany, 2004, 94(1): 119–128.

[24]  单立山, 李毅, 董秋莲, 耿东梅. 红砂根系构型对干旱的生态适应[J]. 中国沙漠, 2012, 32(5): 1283–1290.

[25]  张爱敏, 张晓龙, 江律, 肖丽, 罗乐, 于超, 张启翔. 不同潜水埋深对单叶蔷薇实生苗根系生长与构型的影响[J]. 中国野生植物资源, 2024, 43(4): 45–52.

[26]  白雪, 赵成章, 康满萍. 金塔绿洲不同林龄多枝柽柳根系分叉数与分支角度的关系[J]. 生态学报, 2021, 41(5): 1878–1884.

[27]  王冉, 李吉跃, 张方秋, 朱报著, 潘文. 不同施肥方法对马来沉香和土沉香苗期根系生长的影响[J]. 生态学报, 2011, 31(1): 98–106.

[28]  董鸣. 资源异质性环境中的植物克隆生长:觅食行为[J]. 植物学报, 1996(10): 828–835.

[29]  Sievers A, Braun M, Monshausen G B. The Root Cap: Structure and Function [M]. New York: Marcel Dekker, 2002.


文章导航

/