甲哌鎓对中国南方红壤侵蚀区芒萁抗旱性的诱导  

The drought resistance of Dicranopteris pedata inducted by Mepiquat Chloride in red soil erosion areas of southern China

作　　者：冯柳俊 陈志强 陈志彪[1,2] 罗立津 王健[1,2] FENG Liujun;CHEN Zhiqiang;CHEN Zhibiao;LUO Lijin;WANG Jian(State Key Laboratory for Subtropical Mountain Ecology(Ministry of Science and Technology and Fujian Province funded),Fujian Normal University,Fuzhou 350117,China;School of Geographical Sciences,Fujian Normal University,Fuzhou 350117,China;Laboratory of Environmental Microbiology,Fujian Institute of Microbiology,Fuzhou 350007,China)

机构地区：[1]福建省湿润山地生态重点实验室—省部共建国家重点实验室培育基地,福州350117 [2]福建师范大学地理科学学院,福州350117 [3]福建省微生物研究所环境微生物学实验室,福州350007

出　　处：《生态科学》2025年第1期252-259,共8页Ecological Science

基　　金：福建省自然科学基金资助项目(2020J01143);福建省水利科技项目(MSK202201);福建省水利科技项目(A20LKYC00291B06)。

摘　　要：全球气候变暖使干旱胁迫愈发严重,生态环境因此面临挑战。芒萁是南方红壤侵蚀区水土流失治理和生态修复的重要植物,增强其抗旱性以覆盖环境恶劣区域是该区的治理关键之一,而甲哌鎓能够促进植物抗逆性。因此,选择了南方红壤侵蚀区典型代表长汀县为样地,从形态性状、养分和逆境生理三个方面探讨甲哌鎓喷施对芒萁抗旱性的诱导。结果表明,甲哌鎓使干旱胁迫下芒萁叶面积、比叶面积、叶片相对含水率变小,而叶组织密度和叶干物质含量增加,叶厚度基本不变;甲哌鎓喷施显著促进芒萁N和P的积累,最终使干旱胁迫样地和对照样地芒萁N含量无显著差异;甲哌鎓喷施促使脯氨酸含量增加但未提高抗氧化酶活性。隶属函数法综合评价结果表明300 mg·L^(-1)浓度的甲哌鎓喷施对芒萁抗旱性的诱导效果较好。综上,甲哌鎓能够通过影响叶片形态性状和养分吸收与积累以提高芒萁抗旱性,并一定程度上诱导芒萁抗旱生理。Global warming has made drought stress more serious and thus the ecological environment is facing challenges.Dicranopteris pedata is one of the important plants for soil and water conservation and ecological restoration in the red soil erosion areas of southern China.Enhancing the drought resistance of Dicranopteris pedata to cover areas of harsh environment is one of the key factors in managing red soil erosion in this area,and Mepiquat Chloride is able to promote plant resilience.Therefore,Changting County,a typical representative of the southern red soil erosion zone,was selected as a sample site to explore the induction of drought resistence in Dicranopteris pedata by Mepiquat Chloride application from three aspects morphological traits,nutrients and stress physiology.The results showed that Mepiquat Chloride caused a decrease in leaf area,specific leaf area,and relative water content of Dicranopteris pedata under drought stress,but increased leaf tissue density and leaf dry matter content,while leaf thickness remained basically unchanged.Mepiquat Chloride application significantly promoted the accumulation of N and P of Dicranopteris pedata,and finally there was no significant difference in N content of Dicranopteris pedata between the drought-stressed plots and control plots.Mepiquat Chloride application caused an increase in proline content,but did not improve the activity of antioxidant enzymes.The results of comprehensive evaluation of membership function method showed that Mepiquat Chloride application with a concentration of 300 mg·L^(-1) had a better effect on inducing drought resistence of Dicranopteris pedata.In conclusion,Mepiquat Chloride can improve the drought resistance of Dicranopteris pedata by affecting leaf morphological traits and nutrient absortion and accumulation,and induce drought resistance physiology of Dicranopteris pedata to a certain extent.

关 键 词：芒萁 干旱胁迫 甲哌鎓 水土流失 养分 形态性状 

分 类 号：S157.9[农业科学—土壤学]