干旱胁迫对枫香‘云林紫枫’生长及叶色的影响  

Effects of drought stress on growth and leaf color of Liquidambar formosana‘Yunlin Zifeng’

作　　者：吕薇 曹受金[1] 周琦 沈鑫[2] 李因刚[2] LÜWei;CAO Shoujin;ZHOU Qi;SHEN Xin;LI Yingang(College of Forestry,Central South University of Forestry&Technology,Changsha 410004,Hunan,China;Zhejiang Key Laboratory of Forest Genetics and Breeding,Zhejiang Academy of Forestry,Hangzhou 310023,Zhejiang,China)

机构地区：[1]中南林业科技大学林学院,湖南长沙410004 [2]浙江省林业科学研究院浙江省林木育种全省重点实验室,浙江杭州310023

出　　处：《中南林业科技大学学报》2024年第9期29-37,共9页Journal of Central South University of Forestry & Technology

基　　金：国家自然科学基金项目(32161143003);浙江省农业新品种选育重大科技专项(2021C02070-7)。

摘　　要：【目的】研究不同土壤水分条件与‘云林紫枫’生长及叶色的关系。【方法】以‘云林紫枫’1年生幼苗为试验材料,系统开展了其在土壤含水量分别为土壤田间持水量80%(对照组)、65%、50%和35%条件下的幼苗生长和叶色变化研究。采用小型色差计CR-10 Plus测定叶片色度值,采用紫外-可见分光光度计测定叶片叶绿素、类胡萝卜素、花色苷含量以及可溶性糖含量。【结果】1)土壤含水量为65%条件下‘云林紫枫’总生物量积累最多(23.83 g),而50%条件下‘云林紫枫’株高(62.98 cm)和地径增长量(1.34 mm)最大;2)随着试验的进行,各处理叶片色度值L^(*)先升后降,色度值a^(*)和b^(*)先降后升,水分处理70 d后叶片各色度值均低于对照组,且65%条件下L^(*)、50%条件下a^(*)和b^(*)及35%条件下a^(*)显著低于对照组(P<0.05);3)不同水分处理下的‘云林紫枫’叶片叶绿素a和类胡萝卜素含量呈增加趋势,叶绿素b、总叶绿素含量先增后减,叶绿素a/b呈先降后升的趋势,处理70 d时,35%条件下的叶片叶绿素b含量显著低于对照与65%条件(P<0.05);50%条件下叶片花色素苷和可溶性糖含量显著高于其他处理(P<0.05)。【结论】土壤含水量为田间持水量50%条件时有利于‘云林紫枫’幼苗的生长和生物量累积,同时可以有效提高‘云林紫枫’叶片花色素苷和可溶性糖的积累,长期过低的水分供应会促进植物根系的生长。‘云林紫枫’叶片色素含量及种类是影响叶色呈色的重要因素,可溶性糖含量会在一定程度上影响花色苷的合成和表达。【Objective】To study the relationship between different soil moisture conditions and the growth and leaf color of Liquidambar formosana‘Yunlin Zifeng’.【Method】Using 1-year-old L.formosana‘Yunlin Zifeng’as experimental materials and systematically conducted a study on their growth and leaf color changes under soil moisture content of 80%,65%,50%,and 35%of soil field moisture.The leaf chromaticity values was determined by a small colorimeter CR-10 Plus.The contents of chlorophyll,carotenoid,anthocyanins and soluble sugars were determined by UV-visible spectrophotometer.【Result】1)Under the condition of soil moisture content of 65%,the total biomass accumulation of L.formosana‘Yunlin Zifeng’was the highest(23.83 g),while under the condition of 50%,the height(62.98 cm)and diameter growth were the highest(1.34 mm);2)As the experiment progressed,the leaves chromaticity values L^(*)in each treatment first increased and then decreased,while the chromaticity values a^(*)and b^(*)showed a trend of first decreasing and then increasing.After 70 days of drought treatment,the leaves chromaticity values were all lower than 80%,and under 65% conditions,L^(*),a^(*),and b^(*)with 50% conditions,and a^(*)with 35% conditions,were significantly lower than 80% (P<0.05).The chlorophyll a and carotenoid content in L.formosana‘Yunlin Zifeng’leaves under different water treatments showed an increasing trend,while chlorophyll b and total chlorophyll content first increased and then decreased,and chlorophyll a/b showed a decreasing and then increasing trend.At 70 days,the chlorophyll b content in leaves under 35% conditions was significantly lower than that of the control and 65%(P<0.05);3)Under 50% conditions,the content of anthocyanins and soluble sugars in leaves was significantly higher than other treatments(P<0.05).【Conclusion】Under 50%conditions,it is beneficial for the growth and biomass accumulation of L.formosana‘Yunlin Zifeng’,while effectively increasing the accumulation of anthocyanins and solub

关 键 词：枫香 土壤水分 生长 叶色 生理指标 

分 类 号：S718.43[农业科学—林学]