干旱胁迫对不同耐旱型杉木矿质元素分配的影响  

Effect of drought stress on mineral element allocation of Cunninghamia lanceolata with different drought tolerance

作　　者：郭文娟 张丽仙 陈宇龙 郭嘉龙 周丽丽 李树斌[1,2] GUO Wenjuan;ZHANG Lixian;CHEN Yulong;GUO Jialong;ZHOU Lili;LI Shubin(College of Forestry,Fujian Agriculture and Forestry University,Fuzhou,Fujian 350002,China;Chinese Fir Engineering Technology Research Center of the State Forestry and Grassland Administration,Fuzhou,Fujian 350002,China;College of Resources and Environment,Fujian Agriculture and Forestry University,Fuzhou,Fujian 350002,China;College of JunCao Science and Ecology(College of Carbon Neutrality),Fujian Agriculture and Forestry University,Fuzhou,Fujian 350002,China;College of Geography and Oceanography,Minjiang University,Fuzhou,Fujian 350108,China)

机构地区：[1]福建农林大学林学院,福建福州350002 [2]国家林业和草原局杉木工程技术研究中心,福建福州350002 [3]福建农林大学资源与环境学院,福建福州350002 [4]福建农林大学菌草与生态学院(碳中和学院),福建福州350002 [5]闽江学院地理与海洋学院,福建福州350108

出　　处：《福建农林大学学报(自然科学版)》2025年第2期199-208,共10页Journal of Fujian Agriculture and Forestry University:Natural Science Edition

基　　金：国家自然科学基金项目(32001306);福建农林大学科技创新专项基金项目(KFB23056)。

摘　　要：【目的】研究不同耐旱型杉木各器官矿质元素对干旱胁迫的响应规律,为揭示杉木的耐旱机理、提高林地生产力提供科学依据。【方法】以2年生不同耐旱型(忍耐型和敏感型)杉木幼苗为研究对象,采用室内盆栽控水法,设置正常水分(对照)和干旱胁迫处理(即分别为田间持水量的70%~80%和40%~50%),研究干旱胁迫对不同耐旱型杉木幼苗各器官矿质元素(K、Ca、Mg、Mn、Na、Al)分配的影响。【结果】与对照相比,干旱胁迫下敏感型杉木粗根(木质部和韧皮部)、枝(木质部和韧皮部)的Ca、Mg、Mn含量减少,而忍耐型杉木粗根(木质部和韧皮部)、茎(木质部和韧皮部)、枝(木质部和韧皮部)和叶的Ca、Mg、Mn含量增加;敏感型杉木枝(木质部和韧皮部)的K含量减少,忍耐型杉木茎(木质部和韧皮部)、叶的K含量增加;敏感型杉木地下部分、枝(木质部和韧皮部)的Na、Al含量下降,忍耐型杉木的细根、粗根韧皮部、枝(木质部和韧皮部)的Na含量增加,粗根木质部、叶的Na含量减少,地下部分、茎(木质部和韧皮部)的Al含量减少。相关性分析表明,细根与枝木质部的K、Mg、Mn、Na、Al含量呈极显著正相关(P<0.01),粗根韧皮部与叶的Ca、Mg、Mn含量呈负相关。主成分分析结果表明,干旱胁迫主要影响敏感型杉木细根、粗根韧皮部K、Ca、Mg及茎韧皮部Mn的含量,对忍耐型杉木细根、粗根韧皮部Na和Al、叶的Ca含量影响较大。【结论】不同耐旱型杉木在干旱胁迫下形成不同的矿质元素分配策略:敏感型杉木在干旱胁迫下减少了地下部根系对K、Ca、Mg、Na、Al的吸收,增加了叶对K、Ca的吸收;忍耐型杉木在干旱胁迫下增加了细根对K、Mg、Mn、Na的吸收,以及地上部器官对K、Ca、Mg、Mn的吸收。【Objective】Dynamics in the contents of mineral elements in various organs of Cunninghamia lanceolata(Chinese fir)were investigated in response to different drought stress,aiming to provide scientific basis for unveiling drought tolerance mechanism and improving the productivity of Chinese fir plantation.【Method】Two⁃year⁃old Chinese fir seedlings,with contrasting drought toler⁃ance(tolerant and sensitive types),were subject to various drought stress(70%-80%and 40%-50%of field water capacity),with regular water supply as the control by indoor potted watering control method.The effect of drought stress on the distribution of mineral elements,including potassium(K),calcium(Ca),magnesium(Mg),manganese(Mn),sodium(Na)and aluminum(Al)in different organs of Chinese fir seedlings were studied.【Result】Compared with the control,the contents of Ca,Mg and Mn were declined in the coarse root(xylem and phloem)and branches(xylem and phloem)of sensitive Chinese fir,while increased in the coarse root(xylem and phloem),stem(xylem and phloem),branches(xylem and phloem)and needles of the tolerant type.The content of K dropped in the branches(xylem and phloem)of sensitive Chinese fir,while rose in the stem(xylem and phloem)and needles of the tolerant ones.The contents of Na and Al were both decreased in the underground parts and branches(xylem and phloem)of the sensitive type,while the dynamics of Na and Al varied in the tolerant type,which were higher Na content in the fine roots,coarse root cortex and branches,lower Na content in the coarse root xylem and needles,lower Al content in the underground parts and stem.Correlation analysis showed extremely significant positive correlations(P<0.01)between fine roots and the contents of K,Mg,Mn,Na and Al in branch xylem,as well as negative correlation between coarse roots cortex and Ca,Mg and Mn in needles.Principal component analysis indicated that drought stress mainly affected the contents of K,Ca and Mg in the fine roots,coarse root cortex,and the content of Mn in the s

关 键 词：杉木 干旱胁迫 器官 矿质元素 分配策略 

分 类 号：S791.27[农业科学—林木遗传育种]