CAJ | 학술논문

目的：通过对甘草进行不同质量浓度锰处理的研究，探讨锰胁迫对甘草植株生理和生长特性的影响。方法以1年生甘草移栽苗为实验材料，采用盆栽蛭石的方法，共设置5个锰质量浓度水平，分别为CK（0），1．81，18．1，36．2和54．3mg·L －1，在测定甘草叶片色素含量、光合指标及各抗氧化酶活性的同时，对甘草生长指标和地上、地下生物量进行测定。结果甘草各项生理和生长指标随着锰处理质量浓度的增加均呈现先升高后下降的趋势，且适当质量浓度的锰处理与CK和54．3 mg · L －1处理之间比较差异均显著（P＜0．05）。在质量浓度18．1 mg · L －1处理时，甘草叶片各色素含量和净光合速率（Pn）、气孔导度（Gs）、蒸腾速率（Tr）达到最大值，与54．3 mg · L －1处理之间比较差异显著（P＜0．05）。超氧化物歧化酶（SOD）和过氧化物酶（POD）活性在质量浓度18．1 mg · L －1时达到最大值，与54．3 mg · L －1处理之间比较差异显著（P＜0．05），而过氧化氢酶（CAT）活性在质量浓度36．2mg·L－1处理时达到最大值，随后三者活性均开始下降。同时，甘草株高、地茎和芦头直径在质量浓度36．2mg·L－1处理，地上和地下部分干质量在18．1 mg · L －1处理时达最大值后，均开始下降，且与54．3 mg · L －1处理之间比较差异显著（P＜0．05）。结论适当质量浓度的锰处理能够显著提高甘草的各项生理和生长指标，但过高质量浓度的锰则会对甘草生长产生胁迫，抑制其光合产物的积累。
목적：통과대감초진행불동질량농도맹처리적연구，탐토맹협박대감초식주생리화생장특성적영향。방법이1년생감초이재묘위실험재료，채용분재질석적방법，공설치5개맹질량농도수평，분별위CK（0），1．81，18．1，36．2화54．3mg·L －1，재측정감초협편색소함량、광합지표급각항양화매활성적동시，대감초생장지표화지상、지하생물량진행측정。결과감초각항생리화생장지표수착맹처리질량농도적증가균정현선승고후하강적추세，차괄당질량농도적맹처리여CK화54．3 mg · L －1처리지간비교차이균현저（P＜0．05）。재질량농도18．1 mg · L －1처리시，감초협편각색소함량화정광합속솔（Pn）、기공도도（Gs）、증등속솔（Tr）체도최대치，여54．3 mg · L －1처리지간비교차이현저（P＜0．05）。초양화물기화매（SOD）화과양화물매（POD）활성재질량농도18．1 mg · L －1시체도최대치，여54．3 mg · L －1처리지간비교차이현저（P＜0．05），이과양화경매（CAT）활성재질량농도36．2mg·L－1처리시체도최대치，수후삼자활성균개시하강。동시，감초주고、지경화호두직경재질량농도36．2mg·L－1처리，지상화지하부분간질량재18．1 mg · L －1처리시체최대치후，균개시하강，차여54．3 mg · L －1처리지간비교차이현저（P＜0．05）。결론괄당질량농도적맹처리능구현저제고감초적각항생리화생장지표，단과고질량농도적맹칙회대감초생장산생협박，억제기광합산물적적루。
Objective To investigate the effects of manganese(Mn) stress on the physiological and growth characteristics of Glycyr‐rhiza uralensis Fisch ..Methods The transplants of one‐year‐old G .uralensis were subjected to five concentrations of Mn (CK , 1 .81 ,18 .1 ,36 .2 and 54 .3 mg · L -1 ) culturing in vermiculite ,and 1 .81 mg · L -1 Mn was used as the normal concentration in the complete Hoagland nutrition solution .Then the pigments contents ,photosynthesis indicators and antioxidase activities of the leaves of G .uralensis were determined .The growth indicators and biomass of shoots and roots of the plants were also measured . Results All of the physiological and growth characteristics of G .uralensis showed increased with the increase of concentration of Mn treatment ,and showed significant difference between the appropriate concentration of Mn and CK or 54 .3 mg · L -1 Mn (P<0 .05) .The pigments contents ,Pn ,Gs ,Tr reached the highest after 18 .1 mg · L -1 Mn treatment ,and showed significant differ‐ence between 18 .1 and 54 .3 mg · L -1 Mn treatment(P<0 .05) .SOD and POD were the highest after 18 .1 mg · L -1 Mn treat‐ment and showed significant difference between 18 .1 and 54 .3 mg · L -1 Mn treatment(P<0 .05) ,while CAT was the highest af‐ter 36 .2 mg · L -1 treatment .Then all of them began to decline .Meanwhile ,the growth indicators of height ,root diameter and ground diameter reached the highest after 36 .2 mg · L -1 Mn treatment .Dry weights of the shoots and roots after 18 .1 mg · L -1 treatment were the highest and showed significant difference with 54 .3 mg · L -1 Mn treatment .Conclusion The appropriate con‐centration of Mn treatment could significantly increase the physiological and growth characteristics of G .uralensis ,but excessive concentration of Mn treatment could result in stress on the growth of G .uralensis in all aspects and inhibit the accumulation of photosynthetic products .